Google Git
Sign in
android / toolchain / llvm-project / refs/heads/android12L-tests-release / . / flang / lib / Semantics / resolve-names.cpp
blob: 0d2b8813c7bbc40b61e3f0a9b498207276a9217a [file] [log] [blame] [edit]
//===-- lib/Semantics/resolve-names.cpp -----------------------------------===//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "resolve-names.h"
#include "assignment.h"
#include "mod-file.h"
#include "pointer-assignment.h"
#include "program-tree.h"
#include "resolve-directives.h"
#include "resolve-names-utils.h"
#include "rewrite-parse-tree.h"
#include "flang/Common/Fortran.h"
#include "flang/Common/default-kinds.h"
#include "flang/Common/indirection.h"
#include "flang/Common/restorer.h"
#include "flang/Evaluate/characteristics.h"
#include "flang/Evaluate/check-expression.h"
#include "flang/Evaluate/common.h"
#include "flang/Evaluate/fold-designator.h"
#include "flang/Evaluate/fold.h"
#include "flang/Evaluate/intrinsics.h"
#include "flang/Evaluate/tools.h"
#include "flang/Evaluate/type.h"
#include "flang/Parser/parse-tree-visitor.h"
#include "flang/Parser/parse-tree.h"
#include "flang/Parser/tools.h"
#include "flang/Semantics/attr.h"
#include "flang/Semantics/expression.h"
#include "flang/Semantics/scope.h"
#include "flang/Semantics/semantics.h"
#include "flang/Semantics/symbol.h"
#include "flang/Semantics/tools.h"
#include "flang/Semantics/type.h"
#include "llvm/Support/raw_ostream.h"
#include <list>
#include <map>
#include <set>
#include <stack>
namespace Fortran::semantics {
using namespace parser::literals;
template <typename T> using Indirection = common::Indirection<T>;
using Message = parser::Message;
using Messages = parser::Messages;
using MessageFixedText = parser::MessageFixedText;
using MessageFormattedText = parser::MessageFormattedText;
class ResolveNamesVisitor;
// ImplicitRules maps initial character of identifier to the DeclTypeSpec
// representing the implicit type; std::nullopt if none.
// It also records the presence of IMPLICIT NONE statements.
// When inheritFromParent is set, defaults come from the parent rules.
class ImplicitRules {
public:
ImplicitRules(SemanticsContext &context, ImplicitRules *parent)
: parent_{parent}, context_{context} {
inheritFromParent_ = parent != nullptr;
}
bool isImplicitNoneType() const;
bool isImplicitNoneExternal() const;
void set_isImplicitNoneType(bool x) { isImplicitNoneType_ = x; }
void set_isImplicitNoneExternal(bool x) { isImplicitNoneExternal_ = x; }
void set_inheritFromParent(bool x) { inheritFromParent_ = x; }
// Get the implicit type for this name. May be null.
const DeclTypeSpec *GetType(SourceName) const;
// Record the implicit type for the range of characters [fromLetter,
// toLetter].
void SetTypeMapping(const DeclTypeSpec &type, parser::Location fromLetter,
parser::Location toLetter);
private:
static char Incr(char ch);
ImplicitRules *parent_;
SemanticsContext &context_;
bool inheritFromParent_{false}; // look in parent if not specified here
bool isImplicitNoneType_{
context_.IsEnabled(common::LanguageFeature::ImplicitNoneTypeAlways)};
bool isImplicitNoneExternal_{false};
// map_ contains the mapping between letters and types that were defined
// by the IMPLICIT statements of the related scope. It does not contain
// the default Fortran mappings nor the mapping defined in parents.
std::map<char, common::Reference<const DeclTypeSpec>> map_;
friend llvm::raw_ostream &operator<<(
llvm::raw_ostream &, const ImplicitRules &);
friend void ShowImplicitRule(
llvm::raw_ostream &, const ImplicitRules &, char);
};
// scope -> implicit rules for that scope
using ImplicitRulesMap = std::map<const Scope *, ImplicitRules>;
// Track statement source locations and save messages.
class MessageHandler {
public:
MessageHandler() { DIE("MessageHandler: default-constructed"); }
explicit MessageHandler(SemanticsContext &c) : context_{&c} {}
Messages &messages() { return context_->messages(); };
const std::optional<SourceName> &currStmtSource() {
return context_->location();
}
void set_currStmtSource(const std::optional<SourceName> &source) {
context_->set_location(source);
}
// Emit a message associated with the current statement source.
Message &Say(MessageFixedText &&);
Message &Say(MessageFormattedText &&);
// Emit a message about a SourceName
Message &Say(const SourceName &, MessageFixedText &&);
// Emit a formatted message associated with a source location.
template <typename... A>
Message &Say(const SourceName &source, MessageFixedText &&msg, A &&...args) {
return context_->Say(source, std::move(msg), std::forward<A>(args)...);
}
private:
SemanticsContext *context_;
};
// Inheritance graph for the parse tree visitation classes that follow:
// BaseVisitor
// + AttrsVisitor
// | + DeclTypeSpecVisitor
// | + ImplicitRulesVisitor
// | + ScopeHandler -----------+--+
// | + ModuleVisitor ========|==+
// | + InterfaceVisitor | |
// | +-+ SubprogramVisitor ==|==+
// + ArraySpecVisitor | |
// + DeclarationVisitor <--------+ |
// + ConstructVisitor |
// + ResolveNamesVisitor <------+
class BaseVisitor {
public:
BaseVisitor() { DIE("BaseVisitor: default-constructed"); }
BaseVisitor(
SemanticsContext &c, ResolveNamesVisitor &v, ImplicitRulesMap &rules)
: implicitRulesMap_{&rules}, this_{&v}, context_{&c}, messageHandler_{c} {
}
template <typename T> void Walk(const T &);
MessageHandler &messageHandler() { return messageHandler_; }
const std::optional<SourceName> &currStmtSource() {
return context_->location();
}
SemanticsContext &context() const { return *context_; }
evaluate::FoldingContext &GetFoldingContext() const {
return context_->foldingContext();
}
bool IsIntrinsic(
const SourceName &name, std::optional<Symbol::Flag> flag) const {
if (!flag) {
return context_->intrinsics().IsIntrinsic(name.ToString());
} else if (flag == Symbol::Flag::Function) {
return context_->intrinsics().IsIntrinsicFunction(name.ToString());
} else if (flag == Symbol::Flag::Subroutine) {
return context_->intrinsics().IsIntrinsicSubroutine(name.ToString());
} else {
DIE("expected Subroutine or Function flag");
}
}
// Make a placeholder symbol for a Name that otherwise wouldn't have one.
// It is not in any scope and always has MiscDetails.
void MakePlaceholder(const parser::Name &, MiscDetails::Kind);
template <typename T> common::IfNoLvalue<T, T> FoldExpr(T &&expr) {
return evaluate::Fold(GetFoldingContext(), std::move(expr));
}
template <typename T> MaybeExpr EvaluateExpr(const T &expr) {
return FoldExpr(AnalyzeExpr(*context_, expr));
}
template <typename T>
MaybeExpr EvaluateNonPointerInitializer(
const Symbol &symbol, const T &expr, parser::CharBlock source) {
if (!context().HasError(symbol)) {
if (auto maybeExpr{AnalyzeExpr(*context_, expr)}) {
auto restorer{GetFoldingContext().messages().SetLocation(source)};
return evaluate::NonPointerInitializationExpr(
symbol, std::move(*maybeExpr), GetFoldingContext());
}
}
return std::nullopt;
}
template <typename T> MaybeIntExpr EvaluateIntExpr(const T &expr) {
return semantics::EvaluateIntExpr(*context_, expr);
}
template <typename T>
MaybeSubscriptIntExpr EvaluateSubscriptIntExpr(const T &expr) {
if (MaybeIntExpr maybeIntExpr{EvaluateIntExpr(expr)}) {
return FoldExpr(evaluate::ConvertToType<evaluate::SubscriptInteger>(
std::move(*maybeIntExpr)));
} else {
return std::nullopt;
}
}
template <typename... A> Message &Say(A &&...args) {
return messageHandler_.Say(std::forward<A>(args)...);
}
template <typename... A>
Message &Say(
const parser::Name &name, MessageFixedText &&text, const A &...args) {
return messageHandler_.Say(name.source, std::move(text), args...);
}
protected:
ImplicitRulesMap *implicitRulesMap_{nullptr};
private:
ResolveNamesVisitor *this_;
SemanticsContext *context_;
MessageHandler messageHandler_;
};
// Provide Post methods to collect attributes into a member variable.
class AttrsVisitor : public virtual BaseVisitor {
public:
bool BeginAttrs(); // always returns true
Attrs GetAttrs();
Attrs EndAttrs();
bool SetPassNameOn(Symbol &);
bool SetBindNameOn(Symbol &);
void Post(const parser::LanguageBindingSpec &);
bool Pre(const parser::IntentSpec &);
bool Pre(const parser::Pass &);
bool CheckAndSet(Attr);
// Simple case: encountering CLASSNAME causes ATTRNAME to be set.
#define HANDLE_ATTR_CLASS(CLASSNAME, ATTRNAME) \
bool Pre(const parser::CLASSNAME &) { \
CheckAndSet(Attr::ATTRNAME); \
return false; \
}
HANDLE_ATTR_CLASS(PrefixSpec::Elemental, ELEMENTAL)
HANDLE_ATTR_CLASS(PrefixSpec::Impure, IMPURE)
HANDLE_ATTR_CLASS(PrefixSpec::Module, MODULE)
HANDLE_ATTR_CLASS(PrefixSpec::Non_Recursive, NON_RECURSIVE)
HANDLE_ATTR_CLASS(PrefixSpec::Pure, PURE)
HANDLE_ATTR_CLASS(PrefixSpec::Recursive, RECURSIVE)
HANDLE_ATTR_CLASS(TypeAttrSpec::BindC, BIND_C)
HANDLE_ATTR_CLASS(BindAttr::Deferred, DEFERRED)
HANDLE_ATTR_CLASS(BindAttr::Non_Overridable, NON_OVERRIDABLE)
HANDLE_ATTR_CLASS(Abstract, ABSTRACT)
HANDLE_ATTR_CLASS(Allocatable, ALLOCATABLE)
HANDLE_ATTR_CLASS(Asynchronous, ASYNCHRONOUS)
HANDLE_ATTR_CLASS(Contiguous, CONTIGUOUS)
HANDLE_ATTR_CLASS(External, EXTERNAL)
HANDLE_ATTR_CLASS(Intrinsic, INTRINSIC)
HANDLE_ATTR_CLASS(NoPass, NOPASS)
HANDLE_ATTR_CLASS(Optional, OPTIONAL)
HANDLE_ATTR_CLASS(Parameter, PARAMETER)
HANDLE_ATTR_CLASS(Pointer, POINTER)
HANDLE_ATTR_CLASS(Protected, PROTECTED)
HANDLE_ATTR_CLASS(Save, SAVE)
HANDLE_ATTR_CLASS(Target, TARGET)
HANDLE_ATTR_CLASS(Value, VALUE)
HANDLE_ATTR_CLASS(Volatile, VOLATILE)
#undef HANDLE_ATTR_CLASS
protected:
std::optional<Attrs> attrs_;
Attr AccessSpecToAttr(const parser::AccessSpec &x) {
switch (x.v) {
case parser::AccessSpec::Kind::Public:
return Attr::PUBLIC;
case parser::AccessSpec::Kind::Private:
return Attr::PRIVATE;
}
llvm_unreachable("Switch covers all cases"); // suppress g++ warning
}
Attr IntentSpecToAttr(const parser::IntentSpec &x) {
switch (x.v) {
case parser::IntentSpec::Intent::In:
return Attr::INTENT_IN;
case parser::IntentSpec::Intent::Out:
return Attr::INTENT_OUT;
case parser::IntentSpec::Intent::InOut:
return Attr::INTENT_INOUT;
}
llvm_unreachable("Switch covers all cases"); // suppress g++ warning
}
private:
bool IsDuplicateAttr(Attr);
bool HaveAttrConflict(Attr, Attr, Attr);
bool IsConflictingAttr(Attr);
MaybeExpr bindName_; // from BIND(C, NAME="...")
std::optional<SourceName> passName_; // from PASS(...)
};
// Find and create types from declaration-type-spec nodes.
class DeclTypeSpecVisitor : public AttrsVisitor {
public:
using AttrsVisitor::Post;
using AttrsVisitor::Pre;
void Post(const parser::IntrinsicTypeSpec::DoublePrecision &);
void Post(const parser::IntrinsicTypeSpec::DoubleComplex &);
void Post(const parser::DeclarationTypeSpec::ClassStar &);
void Post(const parser::DeclarationTypeSpec::TypeStar &);
bool Pre(const parser::TypeGuardStmt &);
void Post(const parser::TypeGuardStmt &);
void Post(const parser::TypeSpec &);
protected:
struct State {
bool expectDeclTypeSpec{false}; // should see decl-type-spec only when true
const DeclTypeSpec *declTypeSpec{nullptr};
struct {
DerivedTypeSpec *type{nullptr};
DeclTypeSpec::Category category{DeclTypeSpec::TypeDerived};
} derived;
bool allowForwardReferenceToDerivedType{false};
};
bool allowForwardReferenceToDerivedType() const {
return state_.allowForwardReferenceToDerivedType;
}
void set_allowForwardReferenceToDerivedType(bool yes) {
state_.allowForwardReferenceToDerivedType = yes;
}
// Walk the parse tree of a type spec and return the DeclTypeSpec for it.
template <typename T>
const DeclTypeSpec *ProcessTypeSpec(const T &x, bool allowForward = false) {
auto restorer{common::ScopedSet(state_, State{})};
set_allowForwardReferenceToDerivedType(allowForward);
BeginDeclTypeSpec();
Walk(x);
const auto *type{GetDeclTypeSpec()};
EndDeclTypeSpec();
return type;
}
const DeclTypeSpec *GetDeclTypeSpec();
void BeginDeclTypeSpec();
void EndDeclTypeSpec();
void SetDeclTypeSpec(const DeclTypeSpec &);
void SetDeclTypeSpecCategory(DeclTypeSpec::Category);
DeclTypeSpec::Category GetDeclTypeSpecCategory() const {
return state_.derived.category;
}
KindExpr GetKindParamExpr(
TypeCategory, const std::optional<parser::KindSelector> &);
void CheckForAbstractType(const Symbol &typeSymbol);
private:
State state_;
void MakeNumericType(TypeCategory, int kind);
};
// Visit ImplicitStmt and related parse tree nodes and updates implicit rules.
class ImplicitRulesVisitor : public DeclTypeSpecVisitor {
public:
using DeclTypeSpecVisitor::Post;
using DeclTypeSpecVisitor::Pre;
using ImplicitNoneNameSpec = parser::ImplicitStmt::ImplicitNoneNameSpec;
void Post(const parser::ParameterStmt &);
bool Pre(const parser::ImplicitStmt &);
bool Pre(const parser::LetterSpec &);
bool Pre(const parser::ImplicitSpec &);
void Post(const parser::ImplicitSpec &);
const DeclTypeSpec *GetType(SourceName name) {
return implicitRules_->GetType(name);
}
bool isImplicitNoneType() const {
return implicitRules_->isImplicitNoneType();
}
bool isImplicitNoneType(const Scope &scope) const {
return implicitRulesMap_->at(&scope).isImplicitNoneType();
}
bool isImplicitNoneExternal() const {
return implicitRules_->isImplicitNoneExternal();
}
void set_inheritFromParent(bool x) {
implicitRules_->set_inheritFromParent(x);
}
protected:
void BeginScope(const Scope &);
void SetScope(const Scope &);
private:
// implicit rules in effect for current scope
ImplicitRules *implicitRules_{nullptr};
std::optional<SourceName> prevImplicit_;
std::optional<SourceName> prevImplicitNone_;
std::optional<SourceName> prevImplicitNoneType_;
std::optional<SourceName> prevParameterStmt_;
bool HandleImplicitNone(const std::list<ImplicitNoneNameSpec> &nameSpecs);
};
// Track array specifications. They can occur in AttrSpec, EntityDecl,
// ObjectDecl, DimensionStmt, CommonBlockObject, or BasedPointerStmt.
// 1. INTEGER, DIMENSION(10) :: x
// 2. INTEGER :: x(10)
// 3. ALLOCATABLE :: x(:)
// 4. DIMENSION :: x(10)
// 5. COMMON x(10)
// 6. BasedPointerStmt
class ArraySpecVisitor : public virtual BaseVisitor {
public:
void Post(const parser::ArraySpec &);
void Post(const parser::ComponentArraySpec &);
void Post(const parser::CoarraySpec &);
void Post(const parser::AttrSpec &) { PostAttrSpec(); }
void Post(const parser::ComponentAttrSpec &) { PostAttrSpec(); }
protected:
const ArraySpec &arraySpec();
const ArraySpec &coarraySpec();
void BeginArraySpec();
void EndArraySpec();
void ClearArraySpec() { arraySpec_.clear(); }
void ClearCoarraySpec() { coarraySpec_.clear(); }
private:
// arraySpec_/coarraySpec_ are populated from any ArraySpec/CoarraySpec
ArraySpec arraySpec_;
ArraySpec coarraySpec_;
// When an ArraySpec is under an AttrSpec or ComponentAttrSpec, it is moved
// into attrArraySpec_
ArraySpec attrArraySpec_;
ArraySpec attrCoarraySpec_;
void PostAttrSpec();
};
// Manage a stack of Scopes
class ScopeHandler : public ImplicitRulesVisitor {
public:
using ImplicitRulesVisitor::Post;
using ImplicitRulesVisitor::Pre;
Scope &currScope() { return DEREF(currScope_); }
// The enclosing host procedure if current scope is in an internal procedure
Scope *GetHostProcedure();
// The enclosing scope, skipping blocks and derived types.
// TODO: Will return the scope of a FORALL or implied DO loop; is this ok?
// If not, should call FindProgramUnitContaining() instead.
Scope &InclusiveScope();
// The enclosing scope, skipping derived types.
Scope &NonDerivedTypeScope();
// Create a new scope and push it on the scope stack.
void PushScope(Scope::Kind kind, Symbol *symbol);
void PushScope(Scope &scope);
void PopScope();
void SetScope(Scope &);
template <typename T> bool Pre(const parser::Statement<T> &x) {
messageHandler().set_currStmtSource(x.source);
currScope_->AddSourceRange(x.source);
return true;
}
template <typename T> void Post(const parser::Statement<T> &) {
messageHandler().set_currStmtSource(std::nullopt);
}
// Special messages: already declared; referencing symbol's declaration;
// about a type; two names & locations
void SayAlreadyDeclared(const parser::Name &, Symbol &);
void SayAlreadyDeclared(const SourceName &, Symbol &);
void SayAlreadyDeclared(const SourceName &, const SourceName &);
void SayWithReason(
const parser::Name &, Symbol &, MessageFixedText &&, MessageFixedText &&);
void SayWithDecl(const parser::Name &, Symbol &, MessageFixedText &&);
void SayLocalMustBeVariable(const parser::Name &, Symbol &);
void SayDerivedType(const SourceName &, MessageFixedText &&, const Scope &);
void Say2(const SourceName &, MessageFixedText &&, const SourceName &,
MessageFixedText &&);
void Say2(
const SourceName &, MessageFixedText &&, Symbol &, MessageFixedText &&);
void Say2(
const parser::Name &, MessageFixedText &&, Symbol &, MessageFixedText &&);
// Search for symbol by name in current, parent derived type, and
// containing scopes
Symbol *FindSymbol(const parser::Name &);
Symbol *FindSymbol(const Scope &, const parser::Name &);
// Search for name only in scope, not in enclosing scopes.
Symbol *FindInScope(const Scope &, const parser::Name &);
Symbol *FindInScope(const Scope &, const SourceName &);
// Search for name in a derived type scope and its parents.
Symbol *FindInTypeOrParents(const Scope &, const parser::Name &);
Symbol *FindInTypeOrParents(const parser::Name &);
void EraseSymbol(const parser::Name &);
void EraseSymbol(const Symbol &symbol) { currScope().erase(symbol.name()); }
// Make a new symbol with the name and attrs of an existing one
Symbol &CopySymbol(const SourceName &, const Symbol &);
// Make symbols in the current or named scope
Symbol &MakeSymbol(Scope &, const SourceName &, Attrs);
Symbol &MakeSymbol(const SourceName &, Attrs = Attrs{});
Symbol &MakeSymbol(const parser::Name &, Attrs = Attrs{});
Symbol &MakeHostAssocSymbol(const parser::Name &, const Symbol &);
template <typename D>
common::IfNoLvalue<Symbol &, D> MakeSymbol(
const parser::Name &name, D &&details) {
return MakeSymbol(name, Attrs{}, std::move(details));
}
template <typename D>
common::IfNoLvalue<Symbol &, D> MakeSymbol(
const parser::Name &name, const Attrs &attrs, D &&details) {
return Resolve(name, MakeSymbol(name.source, attrs, std::move(details)));
}
template <typename D>
common::IfNoLvalue<Symbol &, D> MakeSymbol(
const SourceName &name, const Attrs &attrs, D &&details) {
// Note: don't use FindSymbol here. If this is a derived type scope,
// we want to detect whether the name is already declared as a component.
auto *symbol{FindInScope(currScope(), name)};
if (!symbol) {
symbol = &MakeSymbol(name, attrs);
symbol->set_details(std::move(details));
return *symbol;
}
if constexpr (std::is_same_v<DerivedTypeDetails, D>) {
if (auto *d{symbol->detailsIf<GenericDetails>()}) {
if (!d->specific()) {
// derived type with same name as a generic
auto *derivedType{d->derivedType()};
if (!derivedType) {
derivedType =
&currScope().MakeSymbol(name, attrs, std::move(details));
d->set_derivedType(*derivedType);
} else {
SayAlreadyDeclared(name, *derivedType);
}
return *derivedType;
}
}
}
if (symbol->CanReplaceDetails(details)) {
// update the existing symbol
symbol->attrs() |= attrs;
symbol->set_details(std::move(details));
return *symbol;
} else if constexpr (std::is_same_v<UnknownDetails, D>) {
symbol->attrs() |= attrs;
return *symbol;
} else {
if (!CheckPossibleBadForwardRef(*symbol)) {
SayAlreadyDeclared(name, *symbol);
}
// replace the old symbol with a new one with correct details
EraseSymbol(*symbol);
auto &result{MakeSymbol(name, attrs, std::move(details))};
context().SetError(result);
return result;
}
}
void MakeExternal(Symbol &);
protected:
// Apply the implicit type rules to this symbol.
void ApplyImplicitRules(Symbol &);
const DeclTypeSpec *GetImplicitType(Symbol &, const Scope &);
bool ConvertToObjectEntity(Symbol &);
bool ConvertToProcEntity(Symbol &);
const DeclTypeSpec &MakeNumericType(
TypeCategory, const std::optional<parser::KindSelector> &);
const DeclTypeSpec &MakeLogicalType(
const std::optional<parser::KindSelector> &);
void NotePossibleBadForwardRef(const parser::Name &);
std::optional<SourceName> HadForwardRef(const Symbol &) const;
bool CheckPossibleBadForwardRef(const Symbol &);
bool inExecutionPart_{false};
bool inSpecificationPart_{false};
std::set<SourceName> specPartForwardRefs_;
private:
Scope *currScope_{nullptr};
};
class ModuleVisitor : public virtual ScopeHandler {
public:
bool Pre(const parser::AccessStmt &);
bool Pre(const parser::Only &);
bool Pre(const parser::Rename::Names &);
bool Pre(const parser::Rename::Operators &);
bool Pre(const parser::UseStmt &);
void Post(const parser::UseStmt &);
void BeginModule(const parser::Name &, bool isSubmodule);
bool BeginSubmodule(const parser::Name &, const parser::ParentIdentifier &);
void ApplyDefaultAccess();
void AddGenericUse(GenericDetails &, const SourceName &, const Symbol &);
private:
// The default access spec for this module.
Attr defaultAccess_{Attr::PUBLIC};
// The location of the last AccessStmt without access-ids, if any.
std::optional<SourceName> prevAccessStmt_;
// The scope of the module during a UseStmt
Scope *useModuleScope_{nullptr};
Symbol &SetAccess(const SourceName &, Attr attr, Symbol * = nullptr);
// A rename in a USE statement: local => use
struct SymbolRename {
Symbol *local{nullptr};
Symbol *use{nullptr};
};
// Record a use from useModuleScope_ of use Name/Symbol as local Name/Symbol
SymbolRename AddUse(const SourceName &localName, const SourceName &useName);
SymbolRename AddUse(const SourceName &, const SourceName &, Symbol *);
void DoAddUse(const SourceName &, const SourceName &, Symbol &localSymbol,
const Symbol &useSymbol);
void AddUse(const GenericSpecInfo &);
Scope *FindModule(const parser::Name &, Scope *ancestor = nullptr);
};
class InterfaceVisitor : public virtual ScopeHandler {
public:
bool Pre(const parser::InterfaceStmt &);
void Post(const parser::InterfaceStmt &);
void Post(const parser::EndInterfaceStmt &);
bool Pre(const parser::GenericSpec &);
bool Pre(const parser::ProcedureStmt &);
bool Pre(const parser::GenericStmt &);
void Post(const parser::GenericStmt &);
bool inInterfaceBlock() const;
bool isGeneric() const;
bool isAbstract() const;
protected:
GenericDetails &GetGenericDetails();
// Add to generic the symbol for the subprogram with the same name
void CheckGenericProcedures(Symbol &);
private:
// A new GenericInfo is pushed for each interface block and generic stmt
struct GenericInfo {
GenericInfo(bool isInterface, bool isAbstract = false)
: isInterface{isInterface}, isAbstract{isAbstract} {}
bool isInterface; // in interface block
bool isAbstract; // in abstract interface block
Symbol *symbol{nullptr}; // the generic symbol being defined
};
std::stack<GenericInfo> genericInfo_;
const GenericInfo &GetGenericInfo() const { return genericInfo_.top(); }
void SetGenericSymbol(Symbol &symbol) { genericInfo_.top().symbol = &symbol; }
using ProcedureKind = parser::ProcedureStmt::Kind;
// mapping of generic to its specific proc names and kinds
std::multimap<Symbol *, std::pair<const parser::Name *, ProcedureKind>>
specificProcs_;
void AddSpecificProcs(const std::list<parser::Name> &, ProcedureKind);
void ResolveSpecificsInGeneric(Symbol &generic);
};
class SubprogramVisitor : public virtual ScopeHandler, public InterfaceVisitor {
public:
bool HandleStmtFunction(const parser::StmtFunctionStmt &);
bool Pre(const parser::SubroutineStmt &);
void Post(const parser::SubroutineStmt &);
bool Pre(const parser::FunctionStmt &);
void Post(const parser::FunctionStmt &);
bool Pre(const parser::EntryStmt &);
void Post(const parser::EntryStmt &);
bool Pre(const parser::InterfaceBody::Subroutine &);
void Post(const parser::InterfaceBody::Subroutine &);
bool Pre(const parser::InterfaceBody::Function &);
void Post(const parser::InterfaceBody::Function &);
bool Pre(const parser::Suffix &);
bool Pre(const parser::PrefixSpec &);
void Post(const parser::ImplicitPart &);
bool BeginSubprogram(
const parser::Name &, Symbol::Flag, bool hasModulePrefix = false);
bool BeginMpSubprogram(const parser::Name &);
void PushBlockDataScope(const parser::Name &);
void EndSubprogram();
protected:
// Set when we see a stmt function that is really an array element assignment
bool badStmtFuncFound_{false};
private:
// Info about the current function: parse tree of the type in the PrefixSpec;
// name and symbol of the function result from the Suffix; source location.
struct {
const parser::DeclarationTypeSpec *parsedType{nullptr};
const parser::Name *resultName{nullptr};
Symbol *resultSymbol{nullptr};
std::optional<SourceName> source;
} funcInfo_;
// Create a subprogram symbol in the current scope and push a new scope.
void CheckExtantExternal(const parser::Name &, Symbol::Flag);
Symbol &PushSubprogramScope(const parser::Name &, Symbol::Flag);
Symbol *GetSpecificFromGeneric(const parser::Name &);
SubprogramDetails &PostSubprogramStmt(const parser::Name &);
};
class DeclarationVisitor : public ArraySpecVisitor,
public virtual ScopeHandler {
public:
using ArraySpecVisitor::Post;
using ScopeHandler::Post;
using ScopeHandler::Pre;
bool Pre(const parser::Initialization &);
void Post(const parser::EntityDecl &);
void Post(const parser::ObjectDecl &);
void Post(const parser::PointerDecl &);
bool Pre(const parser::BindStmt &) { return BeginAttrs(); }
void Post(const parser::BindStmt &) { EndAttrs(); }
bool Pre(const parser::BindEntity &);
bool Pre(const parser::NamedConstantDef &);
bool Pre(const parser::NamedConstant &);
void Post(const parser::EnumDef &);
bool Pre(const parser::Enumerator &);
bool Pre(const parser::AccessSpec &);
bool Pre(const parser::AsynchronousStmt &);
bool Pre(const parser::ContiguousStmt &);
bool Pre(const parser::ExternalStmt &);
bool Pre(const parser::IntentStmt &);
bool Pre(const parser::IntrinsicStmt &);
bool Pre(const parser::OptionalStmt &);
bool Pre(const parser::ProtectedStmt &);
bool Pre(const parser::ValueStmt &);
bool Pre(const parser::VolatileStmt &);
bool Pre(const parser::AllocatableStmt &) {
objectDeclAttr_ = Attr::ALLOCATABLE;
return true;
}
void Post(const parser::AllocatableStmt &) { objectDeclAttr_ = std::nullopt; }
bool Pre(const parser::TargetStmt &) {
objectDeclAttr_ = Attr::TARGET;
return true;
}
void Post(const parser::TargetStmt &) { objectDeclAttr_ = std::nullopt; }
void Post(const parser::DimensionStmt::Declaration &);
void Post(const parser::CodimensionDecl &);
bool Pre(const parser::TypeDeclarationStmt &) { return BeginDecl(); }
void Post(const parser::TypeDeclarationStmt &);
void Post(const parser::IntegerTypeSpec &);
void Post(const parser::IntrinsicTypeSpec::Real &);
void Post(const parser::IntrinsicTypeSpec::Complex &);
void Post(const parser::IntrinsicTypeSpec::Logical &);
void Post(const parser::IntrinsicTypeSpec::Character &);
void Post(const parser::CharSelector::LengthAndKind &);
void Post(const parser::CharLength &);
void Post(const parser::LengthSelector &);
bool Pre(const parser::KindParam &);
bool Pre(const parser::DeclarationTypeSpec::Type &);
void Post(const parser::DeclarationTypeSpec::Type &);
bool Pre(const parser::DeclarationTypeSpec::Class &);
void Post(const parser::DeclarationTypeSpec::Class &);
bool Pre(const parser::DeclarationTypeSpec::Record &);
void Post(const parser::DerivedTypeSpec &);
bool Pre(const parser::DerivedTypeDef &);
bool Pre(const parser::DerivedTypeStmt &);
void Post(const parser::DerivedTypeStmt &);
bool Pre(const parser::TypeParamDefStmt &) { return BeginDecl(); }
void Post(const parser::TypeParamDefStmt &);
bool Pre(const parser::TypeAttrSpec::Extends &);
bool Pre(const parser::PrivateStmt &);
bool Pre(const parser::SequenceStmt &);
bool Pre(const parser::ComponentDefStmt &) { return BeginDecl(); }
void Post(const parser::ComponentDefStmt &) { EndDecl(); }
void Post(const parser::ComponentDecl &);
bool Pre(const parser::ProcedureDeclarationStmt &);
void Post(const parser::ProcedureDeclarationStmt &);
bool Pre(const parser::DataComponentDefStmt &); // returns false
bool Pre(const parser::ProcComponentDefStmt &);
void Post(const parser::ProcComponentDefStmt &);
bool Pre(const parser::ProcPointerInit &);
void Post(const parser::ProcInterface &);
void Post(const parser::ProcDecl &);
bool Pre(const parser::TypeBoundProcedurePart &);
void Post(const parser::TypeBoundProcedurePart &);
void Post(const parser::ContainsStmt &);
bool Pre(const parser::TypeBoundProcBinding &) { return BeginAttrs(); }
void Post(const parser::TypeBoundProcBinding &) { EndAttrs(); }
void Post(const parser::TypeBoundProcedureStmt::WithoutInterface &);
void Post(const parser::TypeBoundProcedureStmt::WithInterface &);
void Post(const parser::FinalProcedureStmt &);
bool Pre(const parser::TypeBoundGenericStmt &);
bool Pre(const parser::AllocateStmt &);
void Post(const parser::AllocateStmt &);
bool Pre(const parser::StructureConstructor &);
bool Pre(const parser::NamelistStmt::Group &);
bool Pre(const parser::IoControlSpec &);
bool Pre(const parser::CommonStmt::Block &);
bool Pre(const parser::CommonBlockObject &);
void Post(const parser::CommonBlockObject &);
bool Pre(const parser::EquivalenceStmt &);
bool Pre(const parser::SaveStmt &);
bool Pre(const parser::BasedPointerStmt &);
void PointerInitialization(
const parser::Name &, const parser::InitialDataTarget &);
void PointerInitialization(
const parser::Name &, const parser::ProcPointerInit &);
void NonPointerInitialization(
const parser::Name &, const parser::ConstantExpr &);
void CheckExplicitInterface(const parser::Name &);
void CheckBindings(const parser::TypeBoundProcedureStmt::WithoutInterface &);
const parser::Name *ResolveDesignator(const parser::Designator &);
protected:
bool BeginDecl();
void EndDecl();
Symbol &DeclareObjectEntity(const parser::Name &, Attrs = Attrs{});
// Make sure that there's an entity in an enclosing scope called Name
Symbol &FindOrDeclareEnclosingEntity(const parser::Name &);
// Declare a LOCAL/LOCAL_INIT entity. If there isn't a type specified
// it comes from the entity in the containing scope, or implicit rules.
// Return pointer to the new symbol, or nullptr on error.
Symbol *DeclareLocalEntity(const parser::Name &);
// Declare a statement entity (e.g., an implied DO loop index).
// If there isn't a type specified, implicit rules apply.
// Return pointer to the new symbol, or nullptr on error.
Symbol *DeclareStatementEntity(
const parser::Name &, const std::optional<parser::IntegerTypeSpec> &);
Symbol &MakeCommonBlockSymbol(const parser::Name &);
Symbol &MakeCommonBlockSymbol(const std::optional<parser::Name> &);
bool CheckUseError(const parser::Name &);
void CheckAccessibility(const SourceName &, bool, Symbol &);
void CheckCommonBlocks();
void CheckSaveStmts();
void CheckEquivalenceSets();
bool CheckNotInBlock(const char *);
bool NameIsKnownOrIntrinsic(const parser::Name &);
// Each of these returns a pointer to a resolved Name (i.e. with symbol)
// or nullptr in case of error.
const parser::Name *ResolveStructureComponent(
const parser::StructureComponent &);
const parser::Name *ResolveDataRef(const parser::DataRef &);
const parser::Name *ResolveName(const parser::Name &);
bool PassesSharedLocalityChecks(const parser::Name &name, Symbol &symbol);
Symbol *NoteInterfaceName(const parser::Name &);
private:
// The attribute corresponding to the statement containing an ObjectDecl
std::optional<Attr> objectDeclAttr_;
// Info about current character type while walking DeclTypeSpec.
// Also captures any "*length" specifier on an individual declaration.
struct {
std::optional<ParamValue> length;
std::optional<KindExpr> kind;
} charInfo_;
// Info about current derived type while walking DerivedTypeDef
struct {
const parser::Name *extends{nullptr}; // EXTENDS(name)
bool privateComps{false}; // components are private by default
bool privateBindings{false}; // bindings are private by default
bool sawContains{false}; // currently processing bindings
bool sequence{false}; // is a sequence type
const Symbol *type{nullptr}; // derived type being defined
} derivedTypeInfo_;
// Collect equivalence sets and process at end of specification part
std::vector<const std::list<parser::EquivalenceObject> *> equivalenceSets_;
// Names of all common block objects in the scope
std::set<SourceName> commonBlockObjects_;
// Info about about SAVE statements and attributes in current scope
struct {
std::optional<SourceName> saveAll; // "SAVE" without entity list
std::set<SourceName> entities; // names of entities with save attr
std::set<SourceName> commons; // names of common blocks with save attr
} saveInfo_;
// In a ProcedureDeclarationStmt or ProcComponentDefStmt, this is
// the interface name, if any.
const parser::Name *interfaceName_{nullptr};
// Map type-bound generic to binding names of its specific bindings
std::multimap<Symbol *, const parser::Name *> genericBindings_;
// Info about current ENUM
struct EnumeratorState {
// Enum value must hold inside a C_INT (7.6.2).
std::optional<int> value{0};
} enumerationState_;
bool HandleAttributeStmt(Attr, const std::list<parser::Name> &);
Symbol &HandleAttributeStmt(Attr, const parser::Name &);
Symbol &DeclareUnknownEntity(const parser::Name &, Attrs);
Symbol &DeclareProcEntity(const parser::Name &, Attrs, const ProcInterface &);
void SetType(const parser::Name &, const DeclTypeSpec &);
std::optional<DerivedTypeSpec> ResolveDerivedType(const parser::Name &);
std::optional<DerivedTypeSpec> ResolveExtendsType(
const parser::Name &, const parser::Name *);
Symbol *MakeTypeSymbol(const SourceName &, Details &&);
Symbol *MakeTypeSymbol(const parser::Name &, Details &&);
bool OkToAddComponent(const parser::Name &, const Symbol * = nullptr);
ParamValue GetParamValue(
const parser::TypeParamValue &, common::TypeParamAttr attr);
void CheckCommonBlockDerivedType(const SourceName &, const Symbol &);
std::optional<MessageFixedText> CheckSaveAttr(const Symbol &);
Attrs HandleSaveName(const SourceName &, Attrs);
void AddSaveName(std::set<SourceName> &, const SourceName &);
void SetSaveAttr(Symbol &);
bool HandleUnrestrictedSpecificIntrinsicFunction(const parser::Name &);
bool IsUplevelReference(const Symbol &);
const parser::Name *FindComponent(const parser::Name *, const parser::Name &);
void Initialization(const parser::Name &, const parser::Initialization &,
bool inComponentDecl);
bool PassesLocalityChecks(const parser::Name &name, Symbol &symbol);
bool CheckForHostAssociatedImplicit(const parser::Name &);
// Declare an object or procedure entity.
// T is one of: EntityDetails, ObjectEntityDetails, ProcEntityDetails
template <typename T>
Symbol &DeclareEntity(const parser::Name &name, Attrs attrs) {
Symbol &symbol{MakeSymbol(name, attrs)};
if (context().HasError(symbol) || symbol.has<T>()) {
return symbol; // OK or error already reported
} else if (symbol.has<UnknownDetails>()) {
symbol.set_details(T{});
return symbol;
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
symbol.set_details(T{std::move(*details)});
return symbol;
} else if (std::is_same_v<EntityDetails, T> &&
(symbol.has<ObjectEntityDetails>() ||
symbol.has<ProcEntityDetails>())) {
return symbol; // OK
} else if (auto *details{symbol.detailsIf<UseDetails>()}) {
Say(name.source,
"'%s' is use-associated from module '%s' and cannot be re-declared"_err_en_US,
name.source, GetUsedModule(*details).name());
} else if (auto *details{symbol.detailsIf<SubprogramNameDetails>()}) {
if (details->kind() == SubprogramKind::Module) {
Say2(name,
"Declaration of '%s' conflicts with its use as module procedure"_err_en_US,
symbol, "Module procedure definition"_en_US);
} else if (details->kind() == SubprogramKind::Internal) {
Say2(name,
"Declaration of '%s' conflicts with its use as internal procedure"_err_en_US,
symbol, "Internal procedure definition"_en_US);
} else {
DIE("unexpected kind");
}
} else if (std::is_same_v<ObjectEntityDetails, T> &&
symbol.has<ProcEntityDetails>()) {
SayWithDecl(
name, symbol, "'%s' is already declared as a procedure"_err_en_US);
} else if (std::is_same_v<ProcEntityDetails, T> &&
symbol.has<ObjectEntityDetails>()) {
if (InCommonBlock(symbol)) {
SayWithDecl(name, symbol,
"'%s' may not be a procedure as it is in a COMMON block"_err_en_US);
} else {
SayWithDecl(
name, symbol, "'%s' is already declared as an object"_err_en_US);
}
} else if (!CheckPossibleBadForwardRef(symbol)) {
SayAlreadyDeclared(name, symbol);
}
context().SetError(symbol);
return symbol;
}
};
// Resolve construct entities and statement entities.
// Check that construct names don't conflict with other names.
class ConstructVisitor : public virtual DeclarationVisitor {
public:
bool Pre(const parser::ConcurrentHeader &);
bool Pre(const parser::LocalitySpec::Local &);
bool Pre(const parser::LocalitySpec::LocalInit &);
bool Pre(const parser::LocalitySpec::Shared &);
bool Pre(const parser::AcSpec &);
bool Pre(const parser::AcImpliedDo &);
bool Pre(const parser::DataImpliedDo &);
bool Pre(const parser::DataIDoObject &);
bool Pre(const parser::DataStmtObject &);
bool Pre(const parser::DataStmtValue &);
bool Pre(const parser::DoConstruct &);
void Post(const parser::DoConstruct &);
bool Pre(const parser::ForallConstruct &);
void Post(const parser::ForallConstruct &);
bool Pre(const parser::ForallStmt &);
void Post(const parser::ForallStmt &);
bool Pre(const parser::BlockStmt &);
bool Pre(const parser::EndBlockStmt &);
void Post(const parser::Selector &);
bool Pre(const parser::AssociateStmt &);
void Post(const parser::EndAssociateStmt &);
void Post(const parser::Association &);
void Post(const parser::SelectTypeStmt &);
void Post(const parser::SelectRankStmt &);
bool Pre(const parser::SelectTypeConstruct &);
void Post(const parser::SelectTypeConstruct &);
bool Pre(const parser::SelectTypeConstruct::TypeCase &);
void Post(const parser::SelectTypeConstruct::TypeCase &);
// Creates Block scopes with neither symbol name nor symbol details.
bool Pre(const parser::SelectRankConstruct::RankCase &);
void Post(const parser::SelectRankConstruct::RankCase &);
void Post(const parser::TypeGuardStmt::Guard &);
void Post(const parser::SelectRankCaseStmt::Rank &);
bool Pre(const parser::ChangeTeamStmt &);
void Post(const parser::EndChangeTeamStmt &);
void Post(const parser::CoarrayAssociation &);
// Definitions of construct names
bool Pre(const parser::WhereConstructStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::ForallConstructStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::CriticalStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::LabelDoStmt &) {
return false; // error recovery
}
bool Pre(const parser::NonLabelDoStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::IfThenStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::SelectCaseStmt &x) { return CheckDef(x.t); }
bool Pre(const parser::SelectRankConstruct &);
void Post(const parser::SelectRankConstruct &);
bool Pre(const parser::SelectRankStmt &x) {
return CheckDef(std::get<0>(x.t));
}
bool Pre(const parser::SelectTypeStmt &x) {
return CheckDef(std::get<0>(x.t));
}
// References to construct names
void Post(const parser::MaskedElsewhereStmt &x) { CheckRef(x.t); }
void Post(const parser::ElsewhereStmt &x) { CheckRef(x.v); }
void Post(const parser::EndWhereStmt &x) { CheckRef(x.v); }
void Post(const parser::EndForallStmt &x) { CheckRef(x.v); }
void Post(const parser::EndCriticalStmt &x) { CheckRef(x.v); }
void Post(const parser::EndDoStmt &x) { CheckRef(x.v); }
void Post(const parser::ElseIfStmt &x) { CheckRef(x.t); }
void Post(const parser::ElseStmt &x) { CheckRef(x.v); }
void Post(const parser::EndIfStmt &x) { CheckRef(x.v); }
void Post(const parser::CaseStmt &x) { CheckRef(x.t); }
void Post(const parser::EndSelectStmt &x) { CheckRef(x.v); }
void Post(const parser::SelectRankCaseStmt &x) { CheckRef(x.t); }
void Post(const parser::TypeGuardStmt &x) { CheckRef(x.t); }
void Post(const parser::CycleStmt &x) { CheckRef(x.v); }
void Post(const parser::ExitStmt &x) { CheckRef(x.v); }
private:
// R1105 selector -> expr | variable
// expr is set in either case unless there were errors
struct Selector {
Selector() {}
Selector(const SourceName &source, MaybeExpr &&expr)
: source{source}, expr{std::move(expr)} {}
operator bool() const { return expr.has_value(); }
parser::CharBlock source;
MaybeExpr expr;
};
// association -> [associate-name =>] selector
struct Association {
const parser::Name *name{nullptr};
Selector selector;
};
std::vector<Association> associationStack_;
template <typename T> bool CheckDef(const T &t) {
return CheckDef(std::get<std::optional<parser::Name>>(t));
}
template <typename T> void CheckRef(const T &t) {
CheckRef(std::get<std::optional<parser::Name>>(t));
}
bool CheckDef(const std::optional<parser::Name> &);
void CheckRef(const std::optional<parser::Name> &);
const DeclTypeSpec &ToDeclTypeSpec(evaluate::DynamicType &&);
const DeclTypeSpec &ToDeclTypeSpec(
evaluate::DynamicType &&, MaybeSubscriptIntExpr &&length);
Symbol *MakeAssocEntity();
void SetTypeFromAssociation(Symbol &);
void SetAttrsFromAssociation(Symbol &);
Selector ResolveSelector(const parser::Selector &);
void ResolveIndexName(const parser::ConcurrentControl &control);
Association &GetCurrentAssociation();
void PushAssociation();
void PopAssociation();
};
// Create scopes for OpenACC constructs
class AccVisitor : public virtual DeclarationVisitor {
public:
void AddAccSourceRange(const parser::CharBlock &);
static bool NeedsScope(const parser::OpenACCBlockConstruct &);
bool Pre(const parser::OpenACCBlockConstruct &);
void Post(const parser::OpenACCBlockConstruct &);
bool Pre(const parser::AccBeginBlockDirective &x) {
AddAccSourceRange(x.source);
return true;
}
void Post(const parser::AccBeginBlockDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::AccEndBlockDirective &x) {
AddAccSourceRange(x.source);
return true;
}
void Post(const parser::AccEndBlockDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::AccBeginLoopDirective &x) {
AddAccSourceRange(x.source);
return true;
}
void Post(const parser::AccBeginLoopDirective &x) {
messageHandler().set_currStmtSource(std::nullopt);
}
};
bool AccVisitor::NeedsScope(const parser::OpenACCBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::AccBeginBlockDirective>(x.t)};
const auto &beginDir{std::get<parser::AccBlockDirective>(beginBlockDir.t)};
switch (beginDir.v) {
case llvm::acc::Directive::ACCD_data:
case llvm::acc::Directive::ACCD_host_data:
case llvm::acc::Directive::ACCD_kernels:
case llvm::acc::Directive::ACCD_parallel:
case llvm::acc::Directive::ACCD_serial:
return true;
default:
return false;
}
}
void AccVisitor::AddAccSourceRange(const parser::CharBlock &source) {
messageHandler().set_currStmtSource(source);
currScope().AddSourceRange(source);
}
bool AccVisitor::Pre(const parser::OpenACCBlockConstruct &x) {
if (NeedsScope(x)) {
PushScope(Scope::Kind::Block, nullptr);
}
return true;
}
void AccVisitor::Post(const parser::OpenACCBlockConstruct &x) {
if (NeedsScope(x)) {
PopScope();
}
}
// Create scopes for OpenMP constructs
class OmpVisitor : public virtual DeclarationVisitor {
public:
void AddOmpSourceRange(const parser::CharBlock &);
static bool NeedsScope(const parser::OpenMPBlockConstruct &);
bool Pre(const parser::OpenMPBlockConstruct &);
void Post(const parser::OpenMPBlockConstruct &);
bool Pre(const parser::OmpBeginBlockDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpBeginBlockDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::OmpEndBlockDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpEndBlockDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::OpenMPLoopConstruct &) {
PushScope(Scope::Kind::Block, nullptr);
return true;
}
void Post(const parser::OpenMPLoopConstruct &) { PopScope(); }
bool Pre(const parser::OmpBeginLoopDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpBeginLoopDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::OmpEndLoopDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpEndLoopDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::OpenMPSectionsConstruct &) {
PushScope(Scope::Kind::Block, nullptr);
return true;
}
void Post(const parser::OpenMPSectionsConstruct &) { PopScope(); }
bool Pre(const parser::OmpBeginSectionsDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpBeginSectionsDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
bool Pre(const parser::OmpEndSectionsDirective &x) {
AddOmpSourceRange(x.source);
return true;
}
void Post(const parser::OmpEndSectionsDirective &) {
messageHandler().set_currStmtSource(std::nullopt);
}
};
bool OmpVisitor::NeedsScope(const parser::OpenMPBlockConstruct &x) {
const auto &beginBlockDir{std::get<parser::OmpBeginBlockDirective>(x.t)};
const auto &beginDir{std::get<parser::OmpBlockDirective>(beginBlockDir.t)};
switch (beginDir.v) {
case llvm::omp::Directive::OMPD_target_data:
case llvm::omp::Directive::OMPD_master:
case llvm::omp::Directive::OMPD_ordered:
return false;
default:
return true;
}
}
void OmpVisitor::AddOmpSourceRange(const parser::CharBlock &source) {
messageHandler().set_currStmtSource(source);
currScope().AddSourceRange(source);
}
bool OmpVisitor::Pre(const parser::OpenMPBlockConstruct &x) {
if (NeedsScope(x)) {
PushScope(Scope::Kind::Block, nullptr);
}
return true;
}
void OmpVisitor::Post(const parser::OpenMPBlockConstruct &x) {
if (NeedsScope(x)) {
PopScope();
}
}
// Walk the parse tree and resolve names to symbols.
class ResolveNamesVisitor : public virtual ScopeHandler,
public ModuleVisitor,
public SubprogramVisitor,
public ConstructVisitor,
public OmpVisitor,
public AccVisitor {
public:
using AccVisitor::Post;
using AccVisitor::Pre;
using ArraySpecVisitor::Post;
using ConstructVisitor::Post;
using ConstructVisitor::Pre;
using DeclarationVisitor::Post;
using DeclarationVisitor::Pre;
using ImplicitRulesVisitor::Post;
using ImplicitRulesVisitor::Pre;
using InterfaceVisitor::Post;
using InterfaceVisitor::Pre;
using ModuleVisitor::Post;
using ModuleVisitor::Pre;
using OmpVisitor::Post;
using OmpVisitor::Pre;
using ScopeHandler::Post;
using ScopeHandler::Pre;
using SubprogramVisitor::Post;
using SubprogramVisitor::Pre;
ResolveNamesVisitor(SemanticsContext &context, ImplicitRulesMap &rules)
: BaseVisitor{context, *this, rules} {
PushScope(context.globalScope());
}
// Default action for a parse tree node is to visit children.
template <typename T> bool Pre(const T &) { return true; }
template <typename T> void Post(const T &) {}
bool Pre(const parser::SpecificationPart &);
void Post(const parser::Program &);
bool Pre(const parser::ImplicitStmt &);
void Post(const parser::PointerObject &);
void Post(const parser::AllocateObject &);
bool Pre(const parser::PointerAssignmentStmt &);
void Post(const parser::Designator &);
template <typename A, typename B>
void Post(const parser::LoopBounds<A, B> &x) {
ResolveName(*parser::Unwrap<parser::Name>(x.name));
}
void Post(const parser::ProcComponentRef &);
bool Pre(const parser::FunctionReference &);
bool Pre(const parser::CallStmt &);
bool Pre(const parser::ImportStmt &);
void Post(const parser::TypeGuardStmt &);
bool Pre(const parser::StmtFunctionStmt &);
bool Pre(const parser::DefinedOpName &);
bool Pre(const parser::ProgramUnit &);
void Post(const parser::AssignStmt &);
void Post(const parser::AssignedGotoStmt &);
// These nodes should never be reached: they are handled in ProgramUnit
bool Pre(const parser::MainProgram &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::FunctionSubprogram &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::SubroutineSubprogram &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::SeparateModuleSubprogram &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::Module &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::Submodule &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
bool Pre(const parser::BlockData &) {
llvm_unreachable("This node is handled in ProgramUnit");
}
void NoteExecutablePartCall(Symbol::Flag, const parser::Call &);
friend void ResolveSpecificationParts(SemanticsContext &, const Symbol &);
private:
// Kind of procedure we are expecting to see in a ProcedureDesignator
std::optional<Symbol::Flag> expectedProcFlag_;
std::optional<SourceName> prevImportStmt_;
void PreSpecificationConstruct(const parser::SpecificationConstruct &);
void CreateCommonBlockSymbols(const parser::CommonStmt &);
void CreateGeneric(const parser::GenericSpec &);
void FinishSpecificationPart(const std::list<parser::DeclarationConstruct> &);
void AnalyzeStmtFunctionStmt(const parser::StmtFunctionStmt &);
void CheckImports();
void CheckImport(const SourceName &, const SourceName &);
void HandleCall(Symbol::Flag, const parser::Call &);
void HandleProcedureName(Symbol::Flag, const parser::Name &);
bool SetProcFlag(const parser::Name &, Symbol &, Symbol::Flag);
void ResolveSpecificationParts(ProgramTree &);
void AddSubpNames(ProgramTree &);
bool BeginScopeForNode(const ProgramTree &);
void FinishSpecificationParts(const ProgramTree &);
void FinishDerivedTypeInstantiation(Scope &);
void ResolveExecutionParts(const ProgramTree &);
};
// ImplicitRules implementation
bool ImplicitRules::isImplicitNoneType() const {
if (isImplicitNoneType_) {
return true;
} else if (map_.empty() && inheritFromParent_) {
return parent_->isImplicitNoneType();
} else {
return false; // default if not specified
}
}
bool ImplicitRules::isImplicitNoneExternal() const {
if (isImplicitNoneExternal_) {
return true;
} else if (inheritFromParent_) {
return parent_->isImplicitNoneExternal();
} else {
return false; // default if not specified
}
}
const DeclTypeSpec *ImplicitRules::GetType(SourceName name) const {
char ch{name.begin()[0]};
if (isImplicitNoneType_) {
return nullptr;
} else if (auto it{map_.find(ch)}; it != map_.end()) {
return &*it->second;
} else if (inheritFromParent_) {
return parent_->GetType(name);
} else if (ch >= 'i' && ch <= 'n') {
return &context_.MakeNumericType(TypeCategory::Integer);
} else if (ch >= 'a' && ch <= 'z') {
return &context_.MakeNumericType(TypeCategory::Real);
} else {
return nullptr;
}
}
void ImplicitRules::SetTypeMapping(const DeclTypeSpec &type,
parser::Location fromLetter, parser::Location toLetter) {
for (char ch = *fromLetter; ch; ch = ImplicitRules::Incr(ch)) {
auto res{map_.emplace(ch, type)};
if (!res.second) {
context_.Say(parser::CharBlock{fromLetter},
"More than one implicit type specified for '%c'"_err_en_US, ch);
}
if (ch == *toLetter) {
break;
}
}
}
// Return the next char after ch in a way that works for ASCII or EBCDIC.
// Return '\0' for the char after 'z'.
char ImplicitRules::Incr(char ch) {
switch (ch) {
case 'i':
return 'j';
case 'r':
return 's';
case 'z':
return '\0';
default:
return ch + 1;
}
}
llvm::raw_ostream &operator<<(
llvm::raw_ostream &o, const ImplicitRules &implicitRules) {
o << "ImplicitRules:\n";
for (char ch = 'a'; ch; ch = ImplicitRules::Incr(ch)) {
ShowImplicitRule(o, implicitRules, ch);
}
ShowImplicitRule(o, implicitRules, '_');
ShowImplicitRule(o, implicitRules, '$');
ShowImplicitRule(o, implicitRules, '@');
return o;
}
void ShowImplicitRule(
llvm::raw_ostream &o, const ImplicitRules &implicitRules, char ch) {
auto it{implicitRules.map_.find(ch)};
if (it != implicitRules.map_.end()) {
o << " " << ch << ": " << *it->second << '\n';
}
}
template <typename T> void BaseVisitor::Walk(const T &x) {
parser::Walk(x, *this_);
}
void BaseVisitor::MakePlaceholder(
const parser::Name &name, MiscDetails::Kind kind) {
if (!name.symbol) {
name.symbol = &context_->globalScope().MakeSymbol(
name.source, Attrs{}, MiscDetails{kind});
}
}
// AttrsVisitor implementation
bool AttrsVisitor::BeginAttrs() {
CHECK(!attrs_);
attrs_ = std::make_optional<Attrs>();
return true;
}
Attrs AttrsVisitor::GetAttrs() {
CHECK(attrs_);
return *attrs_;
}
Attrs AttrsVisitor::EndAttrs() {
Attrs result{GetAttrs()};
attrs_.reset();
passName_ = std::nullopt;
bindName_.reset();
return result;
}
bool AttrsVisitor::SetPassNameOn(Symbol &symbol) {
if (!passName_) {
return false;
}
std::visit(common::visitors{
[&](ProcEntityDetails &x) { x.set_passName(*passName_); },
[&](ProcBindingDetails &x) { x.set_passName(*passName_); },
[](auto &) { common::die("unexpected pass name"); },
},
symbol.details());
return true;
}
bool AttrsVisitor::SetBindNameOn(Symbol &symbol) {
if (!bindName_) {
return false;
}
std::visit(
common::visitors{
[&](EntityDetails &x) { x.set_bindName(std::move(bindName_)); },
[&](ObjectEntityDetails &x) { x.set_bindName(std::move(bindName_)); },
[&](ProcEntityDetails &x) { x.set_bindName(std::move(bindName_)); },
[&](SubprogramDetails &x) { x.set_bindName(std::move(bindName_)); },
[&](CommonBlockDetails &x) { x.set_bindName(std::move(bindName_)); },
[](auto &) { common::die("unexpected bind name"); },
},
symbol.details());
return true;
}
void AttrsVisitor::Post(const parser::LanguageBindingSpec &x) {
CHECK(attrs_);
if (CheckAndSet(Attr::BIND_C)) {
if (x.v) {
bindName_ = EvaluateExpr(*x.v);
}
}
}
bool AttrsVisitor::Pre(const parser::IntentSpec &x) {
CHECK(attrs_);
CheckAndSet(IntentSpecToAttr(x));
return false;
}
bool AttrsVisitor::Pre(const parser::Pass &x) {
if (CheckAndSet(Attr::PASS)) {
if (x.v) {
passName_ = x.v->source;
MakePlaceholder(*x.v, MiscDetails::Kind::PassName);
}
}
return false;
}
// C730, C743, C755, C778, C1543 say no attribute or prefix repetitions
bool AttrsVisitor::IsDuplicateAttr(Attr attrName) {
if (attrs_->test(attrName)) {
Say(currStmtSource().value(),
"Attribute '%s' cannot be used more than once"_en_US,
AttrToString(attrName));
return true;
}
return false;
}
// See if attrName violates a constraint cause by a conflict. attr1 and attr2
// name attributes that cannot be used on the same declaration
bool AttrsVisitor::HaveAttrConflict(Attr attrName, Attr attr1, Attr attr2) {
if ((attrName == attr1 && attrs_->test(attr2)) ||
(attrName == attr2 && attrs_->test(attr1))) {
Say(currStmtSource().value(),
"Attributes '%s' and '%s' conflict with each other"_err_en_US,
AttrToString(attr1), AttrToString(attr2));
return true;
}
return false;
}
// C759, C1543
bool AttrsVisitor::IsConflictingAttr(Attr attrName) {
return HaveAttrConflict(attrName, Attr::INTENT_IN, Attr::INTENT_INOUT) ||
HaveAttrConflict(attrName, Attr::INTENT_IN, Attr::INTENT_OUT) ||
HaveAttrConflict(attrName, Attr::INTENT_INOUT, Attr::INTENT_OUT) ||
HaveAttrConflict(attrName, Attr::PASS, Attr::NOPASS) || // C781
HaveAttrConflict(attrName, Attr::PURE, Attr::IMPURE) ||
HaveAttrConflict(attrName, Attr::PUBLIC, Attr::PRIVATE) ||
HaveAttrConflict(attrName, Attr::RECURSIVE, Attr::NON_RECURSIVE);
}
bool AttrsVisitor::CheckAndSet(Attr attrName) {
CHECK(attrs_);
if (IsConflictingAttr(attrName) || IsDuplicateAttr(attrName)) {
return false;
}
attrs_->set(attrName);
return true;
}
// DeclTypeSpecVisitor implementation
const DeclTypeSpec *DeclTypeSpecVisitor::GetDeclTypeSpec() {
return state_.declTypeSpec;
}
void DeclTypeSpecVisitor::BeginDeclTypeSpec() {
CHECK(!state_.expectDeclTypeSpec);
CHECK(!state_.declTypeSpec);
state_.expectDeclTypeSpec = true;
}
void DeclTypeSpecVisitor::EndDeclTypeSpec() {
CHECK(state_.expectDeclTypeSpec);
state_ = {};
}
void DeclTypeSpecVisitor::SetDeclTypeSpecCategory(
DeclTypeSpec::Category category) {
CHECK(state_.expectDeclTypeSpec);
state_.derived.category = category;
}
bool DeclTypeSpecVisitor::Pre(const parser::TypeGuardStmt &) {
BeginDeclTypeSpec();
return true;
}
void DeclTypeSpecVisitor::Post(const parser::TypeGuardStmt &) {
EndDeclTypeSpec();
}
void DeclTypeSpecVisitor::Post(const parser::TypeSpec &typeSpec) {
// Record the resolved DeclTypeSpec in the parse tree for use by
// expression semantics if the DeclTypeSpec is a valid TypeSpec.
// The grammar ensures that it's an intrinsic or derived type spec,
// not TYPE(*) or CLASS(*) or CLASS(T).
if (const DeclTypeSpec * spec{state_.declTypeSpec}) {
switch (spec->category()) {
case DeclTypeSpec::Numeric:
case DeclTypeSpec::Logical:
case DeclTypeSpec::Character:
typeSpec.declTypeSpec = spec;
break;
case DeclTypeSpec::TypeDerived:
if (const DerivedTypeSpec * derived{spec->AsDerived()}) {
CheckForAbstractType(derived->typeSymbol()); // C703
typeSpec.declTypeSpec = spec;
}
break;
default:
CRASH_NO_CASE;
}
}
}
void DeclTypeSpecVisitor::Post(
const parser::IntrinsicTypeSpec::DoublePrecision &) {
MakeNumericType(TypeCategory::Real, context().doublePrecisionKind());
}
void DeclTypeSpecVisitor::Post(
const parser::IntrinsicTypeSpec::DoubleComplex &) {
MakeNumericType(TypeCategory::Complex, context().doublePrecisionKind());
}
void DeclTypeSpecVisitor::MakeNumericType(TypeCategory category, int kind) {
SetDeclTypeSpec(context().MakeNumericType(category, kind));
}
void DeclTypeSpecVisitor::CheckForAbstractType(const Symbol &typeSymbol) {
if (typeSymbol.attrs().test(Attr::ABSTRACT)) {
Say("ABSTRACT derived type may not be used here"_err_en_US);
}
}
void DeclTypeSpecVisitor::Post(const parser::DeclarationTypeSpec::ClassStar &) {
SetDeclTypeSpec(context().globalScope().MakeClassStarType());
}
void DeclTypeSpecVisitor::Post(const parser::DeclarationTypeSpec::TypeStar &) {
SetDeclTypeSpec(context().globalScope().MakeTypeStarType());
}
// Check that we're expecting to see a DeclTypeSpec (and haven't seen one yet)
// and save it in state_.declTypeSpec.
void DeclTypeSpecVisitor::SetDeclTypeSpec(const DeclTypeSpec &declTypeSpec) {
CHECK(state_.expectDeclTypeSpec);
CHECK(!state_.declTypeSpec);
state_.declTypeSpec = &declTypeSpec;
}
KindExpr DeclTypeSpecVisitor::GetKindParamExpr(
TypeCategory category, const std::optional<parser::KindSelector> &kind) {
return AnalyzeKindSelector(context(), category, kind);
}
// MessageHandler implementation
Message &MessageHandler::Say(MessageFixedText &&msg) {
return context_->Say(currStmtSource().value(), std::move(msg));
}
Message &MessageHandler::Say(MessageFormattedText &&msg) {
return context_->Say(currStmtSource().value(), std::move(msg));
}
Message &MessageHandler::Say(const SourceName &name, MessageFixedText &&msg) {
return Say(name, std::move(msg), name);
}
// ImplicitRulesVisitor implementation
void ImplicitRulesVisitor::Post(const parser::ParameterStmt &) {
prevParameterStmt_ = currStmtSource();
}
bool ImplicitRulesVisitor::Pre(const parser::ImplicitStmt &x) {
bool result{
std::visit(common::visitors{
[&](const std::list<ImplicitNoneNameSpec> &y) {
return HandleImplicitNone(y);
},
[&](const std::list<parser::ImplicitSpec> &) {
if (prevImplicitNoneType_) {
Say("IMPLICIT statement after IMPLICIT NONE or "
"IMPLICIT NONE(TYPE) statement"_err_en_US);
return false;
}
implicitRules_->set_isImplicitNoneType(false);
return true;
},
},
x.u)};
prevImplicit_ = currStmtSource();
return result;
}
bool ImplicitRulesVisitor::Pre(const parser::LetterSpec &x) {
auto loLoc{std::get<parser::Location>(x.t)};
auto hiLoc{loLoc};
if (auto hiLocOpt{std::get<std::optional<parser::Location>>(x.t)}) {
hiLoc = *hiLocOpt;
if (*hiLoc < *loLoc) {
Say(hiLoc, "'%s' does not follow '%s' alphabetically"_err_en_US,
std::string(hiLoc, 1), std::string(loLoc, 1));
return false;
}
}
implicitRules_->SetTypeMapping(*GetDeclTypeSpec(), loLoc, hiLoc);
return false;
}
bool ImplicitRulesVisitor::Pre(const parser::ImplicitSpec &) {
BeginDeclTypeSpec();
set_allowForwardReferenceToDerivedType(true);
return true;
}
void ImplicitRulesVisitor::Post(const parser::ImplicitSpec &) {
EndDeclTypeSpec();
}
void ImplicitRulesVisitor::SetScope(const Scope &scope) {
implicitRules_ = &DEREF(implicitRulesMap_).at(&scope);
prevImplicit_ = std::nullopt;
prevImplicitNone_ = std::nullopt;
prevImplicitNoneType_ = std::nullopt;
prevParameterStmt_ = std::nullopt;
}
void ImplicitRulesVisitor::BeginScope(const Scope &scope) {
// find or create implicit rules for this scope
DEREF(implicitRulesMap_).try_emplace(&scope, context(), implicitRules_);
SetScope(scope);
}
// TODO: for all of these errors, reference previous statement too
bool ImplicitRulesVisitor::HandleImplicitNone(
const std::list<ImplicitNoneNameSpec> &nameSpecs) {
if (prevImplicitNone_) {
Say("More than one IMPLICIT NONE statement"_err_en_US);
Say(*prevImplicitNone_, "Previous IMPLICIT NONE statement"_en_US);
return false;
}
if (prevParameterStmt_) {
Say("IMPLICIT NONE statement after PARAMETER statement"_err_en_US);
return false;
}
prevImplicitNone_ = currStmtSource();
bool implicitNoneTypeNever{
context().IsEnabled(common::LanguageFeature::ImplicitNoneTypeNever)};
if (nameSpecs.empty()) {
if (!implicitNoneTypeNever) {
prevImplicitNoneType_ = currStmtSource();
implicitRules_->set_isImplicitNoneType(true);
if (prevImplicit_) {
Say("IMPLICIT NONE statement after IMPLICIT statement"_err_en_US);
return false;
}
}
} else {
int sawType{0};
int sawExternal{0};
for (const auto noneSpec : nameSpecs) {
switch (noneSpec) {
case ImplicitNoneNameSpec::External:
implicitRules_->set_isImplicitNoneExternal(true);
++sawExternal;
break;
case ImplicitNoneNameSpec::Type:
if (!implicitNoneTypeNever) {
prevImplicitNoneType_ = currStmtSource();
implicitRules_->set_isImplicitNoneType(true);
if (prevImplicit_) {
Say("IMPLICIT NONE(TYPE) after IMPLICIT statement"_err_en_US);
return false;
}
++sawType;
}
break;
}
}
if (sawType > 1) {
Say("TYPE specified more than once in IMPLICIT NONE statement"_err_en_US);
return false;
}
if (sawExternal > 1) {
Say("EXTERNAL specified more than once in IMPLICIT NONE statement"_err_en_US);
return false;
}
}
return true;
}
// ArraySpecVisitor implementation
void ArraySpecVisitor::Post(const parser::ArraySpec &x) {
CHECK(arraySpec_.empty());
arraySpec_ = AnalyzeArraySpec(context(), x);
}
void ArraySpecVisitor::Post(const parser::ComponentArraySpec &x) {
CHECK(arraySpec_.empty());
arraySpec_ = AnalyzeArraySpec(context(), x);
}
void ArraySpecVisitor::Post(const parser::CoarraySpec &x) {
CHECK(coarraySpec_.empty());
coarraySpec_ = AnalyzeCoarraySpec(context(), x);
}
const ArraySpec &ArraySpecVisitor::arraySpec() {
return !arraySpec_.empty() ? arraySpec_ : attrArraySpec_;
}
const ArraySpec &ArraySpecVisitor::coarraySpec() {
return !coarraySpec_.empty() ? coarraySpec_ : attrCoarraySpec_;
}
void ArraySpecVisitor::BeginArraySpec() {
CHECK(arraySpec_.empty());
CHECK(coarraySpec_.empty());
CHECK(attrArraySpec_.empty());
CHECK(attrCoarraySpec_.empty());
}
void ArraySpecVisitor::EndArraySpec() {
CHECK(arraySpec_.empty());
CHECK(coarraySpec_.empty());
attrArraySpec_.clear();
attrCoarraySpec_.clear();
}
void ArraySpecVisitor::PostAttrSpec() {
// Save dimension/codimension from attrs so we can process array/coarray-spec
// on the entity-decl
if (!arraySpec_.empty()) {
if (attrArraySpec_.empty()) {
attrArraySpec_ = arraySpec_;
arraySpec_.clear();
} else {
Say(currStmtSource().value(),
"Attribute 'DIMENSION' cannot be used more than once"_err_en_US);
}
}
if (!coarraySpec_.empty()) {
if (attrCoarraySpec_.empty()) {
attrCoarraySpec_ = coarraySpec_;
coarraySpec_.clear();
} else {
Say(currStmtSource().value(),
"Attribute 'CODIMENSION' cannot be used more than once"_err_en_US);
}
}
}
// ScopeHandler implementation
void ScopeHandler::SayAlreadyDeclared(const parser::Name &name, Symbol &prev) {
SayAlreadyDeclared(name.source, prev);
}
void ScopeHandler::SayAlreadyDeclared(const SourceName &name, Symbol &prev) {
if (context().HasError(prev)) {
// don't report another error about prev
} else {
if (const auto *details{prev.detailsIf<UseDetails>()}) {
Say(name, "'%s' is already declared in this scoping unit"_err_en_US)
.Attach(details->location(),
"It is use-associated with '%s' in module '%s'"_err_en_US,
details->symbol().name(), GetUsedModule(*details).name());
} else {
SayAlreadyDeclared(name, prev.name());
}
context().SetError(prev);
}
}
void ScopeHandler::SayAlreadyDeclared(
const SourceName &name1, const SourceName &name2) {
if (name1.begin() < name2.begin()) {
SayAlreadyDeclared(name2, name1);
} else {
Say(name1, "'%s' is already declared in this scoping unit"_err_en_US)
.Attach(name2, "Previous declaration of '%s'"_en_US, name2);
}
}
void ScopeHandler::SayWithReason(const parser::Name &name, Symbol &symbol,
MessageFixedText &&msg1, MessageFixedText &&msg2) {
Say2(name, std::move(msg1), symbol, std::move(msg2));
context().SetError(symbol, msg1.isFatal());
}
void ScopeHandler::SayWithDecl(
const parser::Name &name, Symbol &symbol, MessageFixedText &&msg) {
SayWithReason(name, symbol, std::move(msg),
symbol.test(Symbol::Flag::Implicit) ? "Implicit declaration of '%s'"_en_US
: "Declaration of '%s'"_en_US);
}
void ScopeHandler::SayLocalMustBeVariable(
const parser::Name &name, Symbol &symbol) {
SayWithDecl(name, symbol,
"The name '%s' must be a variable to appear"
" in a locality-spec"_err_en_US);
}
void ScopeHandler::SayDerivedType(
const SourceName &name, MessageFixedText &&msg, const Scope &type) {
const Symbol &typeSymbol{DEREF(type.GetSymbol())};
Say(name, std::move(msg), name, typeSymbol.name())
.Attach(typeSymbol.name(), "Declaration of derived type '%s'"_en_US,
typeSymbol.name());
}
void ScopeHandler::Say2(const SourceName &name1, MessageFixedText &&msg1,
const SourceName &name2, MessageFixedText &&msg2) {
Say(name1, std::move(msg1)).Attach(name2, std::move(msg2), name2);
}
void ScopeHandler::Say2(const SourceName &name, MessageFixedText &&msg1,
Symbol &symbol, MessageFixedText &&msg2) {
Say2(name, std::move(msg1), symbol.name(), std::move(msg2));
context().SetError(symbol, msg1.isFatal());
}
void ScopeHandler::Say2(const parser::Name &name, MessageFixedText &&msg1,
Symbol &symbol, MessageFixedText &&msg2) {
Say2(name.source, std::move(msg1), symbol.name(), std::move(msg2));
context().SetError(symbol, msg1.isFatal());
}
// T may be `Scope` or `const Scope`
template <typename T> static T &GetInclusiveScope(T &scope) {
for (T *s{&scope}; !s->IsGlobal(); s = &s->parent()) {
if (s->kind() != Scope::Kind::Block && !s->IsDerivedType() &&
!s->IsStmtFunction()) {
return *s;
}
}
return scope;
}
Scope &ScopeHandler::InclusiveScope() { return GetInclusiveScope(currScope()); }
Scope *ScopeHandler::GetHostProcedure() {
Scope &parent{InclusiveScope().parent()};
return parent.kind() == Scope::Kind::Subprogram ? &parent : nullptr;
}
Scope &ScopeHandler::NonDerivedTypeScope() {
return currScope_->IsDerivedType() ? currScope_->parent() : *currScope_;
}
void ScopeHandler::PushScope(Scope::Kind kind, Symbol *symbol) {
PushScope(currScope().MakeScope(kind, symbol));
}
void ScopeHandler::PushScope(Scope &scope) {
currScope_ = &scope;
auto kind{currScope_->kind()};
if (kind != Scope::Kind::Block) {
BeginScope(scope);
}
// The name of a module or submodule cannot be "used" in its scope,
// as we read 19.3.1(2), so we allow the name to be used as a local
// identifier in the module or submodule too. Same with programs
// (14.1(3)) and BLOCK DATA.
if (!currScope_->IsDerivedType() && kind != Scope::Kind::Module &&
kind != Scope::Kind::MainProgram && kind != Scope::Kind::BlockData) {
if (auto *symbol{scope.symbol()}) {
// Create a dummy symbol so we can't create another one with the same
// name. It might already be there if we previously pushed the scope.
if (!FindInScope(scope, symbol->name())) {
auto &newSymbol{MakeSymbol(symbol->name())};
if (kind == Scope::Kind::Subprogram) {
// Allow for recursive references. If this symbol is a function
// without an explicit RESULT(), this new symbol will be discarded
// and replaced with an object of the same name.
newSymbol.set_details(HostAssocDetails{*symbol});
} else {
newSymbol.set_details(MiscDetails{MiscDetails::Kind::ScopeName});
}
}
}
}
}
void ScopeHandler::PopScope() {
// Entities that are not yet classified as objects or procedures are now
// assumed to be objects.
// TODO: Statement functions
for (auto &pair : currScope()) {
ConvertToObjectEntity(*pair.second);
}
SetScope(currScope_->parent());
}
void ScopeHandler::SetScope(Scope &scope) {
currScope_ = &scope;
ImplicitRulesVisitor::SetScope(InclusiveScope());
}
Symbol *ScopeHandler::FindSymbol(const parser::Name &name) {
return FindSymbol(currScope(), name);
}
Symbol *ScopeHandler::FindSymbol(const Scope &scope, const parser::Name &name) {
if (scope.IsDerivedType()) {
if (Symbol * symbol{scope.FindComponent(name.source)}) {
if (!symbol->has<ProcBindingDetails>() &&
!symbol->test(Symbol::Flag::ParentComp)) {
return Resolve(name, symbol);
}
}
return FindSymbol(scope.parent(), name);
} else {
return Resolve(name, scope.FindSymbol(name.source));
}
}
Symbol &ScopeHandler::MakeSymbol(
Scope &scope, const SourceName &name, Attrs attrs) {
if (Symbol * symbol{FindInScope(scope, name)}) {
symbol->attrs() |= attrs;
return *symbol;
} else {
const auto pair{scope.try_emplace(name, attrs, UnknownDetails{})};
CHECK(pair.second); // name was not found, so must be able to add
return *pair.first->second;
}
}
Symbol &ScopeHandler::MakeSymbol(const SourceName &name, Attrs attrs) {
return MakeSymbol(currScope(), name, attrs);
}
Symbol &ScopeHandler::MakeSymbol(const parser::Name &name, Attrs attrs) {
return Resolve(name, MakeSymbol(name.source, attrs));
}
Symbol &ScopeHandler::MakeHostAssocSymbol(
const parser::Name &name, const Symbol &hostSymbol) {
Symbol &symbol{MakeSymbol(name, HostAssocDetails{hostSymbol})};
name.symbol = &symbol;
symbol.attrs() = hostSymbol.attrs(); // TODO: except PRIVATE, PUBLIC?
symbol.flags() = hostSymbol.flags();
return symbol;
}
Symbol &ScopeHandler::CopySymbol(const SourceName &name, const Symbol &symbol) {
CHECK(!FindInScope(currScope(), name));
return MakeSymbol(currScope(), name, symbol.attrs());
}
// Look for name only in scope, not in enclosing scopes.
Symbol *ScopeHandler::FindInScope(
const Scope &scope, const parser::Name &name) {
return Resolve(name, FindInScope(scope, name.source));
}
Symbol *ScopeHandler::FindInScope(const Scope &scope, const SourceName &name) {
if (auto it{scope.find(name)}; it != scope.end()) {
return &*it->second;
} else {
return nullptr;
}
}
// Find a component or type parameter by name in a derived type or its parents.
Symbol *ScopeHandler::FindInTypeOrParents(
const Scope &scope, const parser::Name &name) {
return Resolve(name, scope.FindComponent(name.source));
}
Symbol *ScopeHandler::FindInTypeOrParents(const parser::Name &name) {
return FindInTypeOrParents(currScope(), name);
}
void ScopeHandler::EraseSymbol(const parser::Name &name) {
currScope().erase(name.source);
name.symbol = nullptr;
}
static bool NeedsType(const Symbol &symbol) {
return !symbol.GetType() &&
std::visit(common::visitors{
[](const EntityDetails &) { return true; },
[](const ObjectEntityDetails &) { return true; },
[](const AssocEntityDetails &) { return true; },
[&](const ProcEntityDetails &p) {
return symbol.test(Symbol::Flag::Function) &&
!symbol.attrs().test(Attr::INTRINSIC) &&
!p.interface().type() && !p.interface().symbol();
},
[](const auto &) { return false; },
},
symbol.details());
}
void ScopeHandler::ApplyImplicitRules(Symbol &symbol) {
if (NeedsType(symbol)) {
const Scope *scope{&symbol.owner()};
if (scope->IsGlobal()) {
scope = &currScope();
}
if (const DeclTypeSpec *
type{GetImplicitType(symbol, GetInclusiveScope(*scope))}) {
symbol.set(Symbol::Flag::Implicit);
symbol.SetType(*type);
return;
}
if (symbol.has<ProcEntityDetails>() &&
!symbol.attrs().test(Attr::EXTERNAL)) {
std::optional<Symbol::Flag> functionOrSubroutineFlag;
if (symbol.test(Symbol::Flag::Function)) {
functionOrSubroutineFlag = Symbol::Flag::Function;
} else if (symbol.test(Symbol::Flag::Subroutine)) {
functionOrSubroutineFlag = Symbol::Flag::Subroutine;
}
if (IsIntrinsic(symbol.name(), functionOrSubroutineFlag)) {
// type will be determined in expression semantics
symbol.attrs().set(Attr::INTRINSIC);
return;
}
}
if (!context().HasError(symbol)) {
Say(symbol.name(), "No explicit type declared for '%s'"_err_en_US);
context().SetError(symbol);
}
}
}
const DeclTypeSpec *ScopeHandler::GetImplicitType(
Symbol &symbol, const Scope &scope) {
const auto *type{implicitRulesMap_->at(&scope).GetType(symbol.name())};
if (type) {
if (const DerivedTypeSpec * derived{type->AsDerived()}) {
// Resolve any forward-referenced derived type; a quick no-op else.
auto &instantiatable{*const_cast<DerivedTypeSpec *>(derived)};
instantiatable.Instantiate(currScope(), context());
}
}
return type;
}
// Convert symbol to be a ObjectEntity or return false if it can't be.
bool ScopeHandler::ConvertToObjectEntity(Symbol &symbol) {
if (symbol.has<ObjectEntityDetails>()) {
// nothing to do
} else if (symbol.has<UnknownDetails>()) {
symbol.set_details(ObjectEntityDetails{});
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
symbol.set_details(ObjectEntityDetails{std::move(*details)});
} else if (auto *useDetails{symbol.detailsIf<UseDetails>()}) {
return useDetails->symbol().has<ObjectEntityDetails>();
} else {
return false;
}
return true;
}
// Convert symbol to be a ProcEntity or return false if it can't be.
bool ScopeHandler::ConvertToProcEntity(Symbol &symbol) {
if (symbol.has<ProcEntityDetails>()) {
// nothing to do
} else if (symbol.has<UnknownDetails>()) {
symbol.set_details(ProcEntityDetails{});
} else if (auto *details{symbol.detailsIf<EntityDetails>()}) {
symbol.set_details(ProcEntityDetails{std::move(*details)});
if (symbol.GetType() && !symbol.test(Symbol::Flag::Implicit)) {
CHECK(!symbol.test(Symbol::Flag::Subroutine));
symbol.set(Symbol::Flag::Function);
}
} else {
return false;
}
return true;
}
const DeclTypeSpec &ScopeHandler::MakeNumericType(
TypeCategory category, const std::optional<parser::KindSelector> &kind) {
KindExpr value{GetKindParamExpr(category, kind)};
if (auto known{evaluate::ToInt64(value)}) {
return context().MakeNumericType(category, static_cast<int>(*known));
} else {
return currScope_->MakeNumericType(category, std::move(value));
}
}
const DeclTypeSpec &ScopeHandler::MakeLogicalType(
const std::optional<parser::KindSelector> &kind) {
KindExpr value{GetKindParamExpr(TypeCategory::Logical, kind)};
if (auto known{evaluate::ToInt64(value)}) {
return context().MakeLogicalType(static_cast<int>(*known));
} else {
return currScope_->MakeLogicalType(std::move(value));
}
}
void ScopeHandler::NotePossibleBadForwardRef(const parser::Name &name) {
if (inSpecificationPart_ && name.symbol) {
auto kind{currScope().kind()};
if ((kind == Scope::Kind::Subprogram && !currScope().IsStmtFunction()) ||
kind == Scope::Kind::Block) {
bool isHostAssociated{&name.symbol->owner() == &currScope()
? name.symbol->has<HostAssocDetails>()
: name.symbol->owner().Contains(currScope())};
if (isHostAssociated) {
specPartForwardRefs_.insert(name.source);
}
}
}
}
std::optional<SourceName> ScopeHandler::HadForwardRef(
const Symbol &symbol) const {
auto iter{specPartForwardRefs_.find(symbol.name())};
if (iter != specPartForwardRefs_.end()) {
return *iter;
}
return std::nullopt;
}
bool ScopeHandler::CheckPossibleBadForwardRef(const Symbol &symbol) {
if (!context().HasError(symbol)) {
if (auto fwdRef{HadForwardRef(symbol)}) {
Say(*fwdRef,
"Forward reference to '%s' is not allowed in the same specification part"_err_en_US,
*fwdRef)
.Attach(symbol.name(), "Later declaration of '%s'"_en_US, *fwdRef);
context().SetError(symbol);
return true;
}
}
return false;
}
void ScopeHandler::MakeExternal(Symbol &symbol) {
if (!symbol.attrs().test(Attr::EXTERNAL)) {
symbol.attrs().set(Attr::EXTERNAL);
if (symbol.attrs().test(Attr::INTRINSIC)) { // C840
Say(symbol.name(),
"Symbol '%s' cannot have both EXTERNAL and INTRINSIC attributes"_err_en_US,
symbol.name());
}
}
}
// ModuleVisitor implementation
bool ModuleVisitor::Pre(const parser::Only &x) {
std::visit(common::visitors{
[&](const Indirection<parser::GenericSpec> &generic) {
AddUse(GenericSpecInfo{generic.value()});
},
[&](const parser::Name &name) {
Resolve(name, AddUse(name.source, name.source).use);
},
[&](const parser::Rename &rename) { Walk(rename); },
},
x.u);
return false;
}
bool ModuleVisitor::Pre(const parser::Rename::Names &x) {
const auto &localName{std::get<0>(x.t)};
const auto &useName{std::get<1>(x.t)};
SymbolRename rename{AddUse(localName.source, useName.source)};
Resolve(useName, rename.use);
Resolve(localName, rename.local);
return false;
}
bool ModuleVisitor::Pre(const parser::Rename::Operators &x) {
const parser::DefinedOpName &local{std::get<0>(x.t)};
const parser::DefinedOpName &use{std::get<1>(x.t)};
GenericSpecInfo localInfo{local};
GenericSpecInfo useInfo{use};
if (IsIntrinsicOperator(context(), local.v.source)) {
Say(local.v,
"Intrinsic operator '%s' may not be used as a defined operator"_err_en_US);
} else if (IsLogicalConstant(context(), local.v.source)) {
Say(local.v,
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
} else {
SymbolRename rename{AddUse(localInfo.symbolName(), useInfo.symbolName())};
useInfo.Resolve(rename.use);
localInfo.Resolve(rename.local);
}
return false;
}
// Set useModuleScope_ to the Scope of the module being used.
bool ModuleVisitor::Pre(const parser::UseStmt &x) {
useModuleScope_ = FindModule(x.moduleName);
if (!useModuleScope_) {
return false;
}
// use the name from this source file
useModuleScope_->symbol()->ReplaceName(x.moduleName.source);
return true;
}
void ModuleVisitor::Post(const parser::UseStmt &x) {
if (const auto *list{std::get_if<std::list<parser::Rename>>(&x.u)}) {
// Not a use-only: collect the names that were used in renames,
// then add a use for each public name that was not renamed.
std::set<SourceName> useNames;
for (const auto &rename : *list) {
std::visit(common::visitors{
[&](const parser::Rename::Names &names) {
useNames.insert(std::get<1>(names.t).source);
},
[&](const parser::Rename::Operators &ops) {
useNames.insert(std::get<1>(ops.t).v.source);
},
},
rename.u);
}
for (const auto &[name, symbol] : *useModuleScope_) {
if (symbol->attrs().test(Attr::PUBLIC) &&
!symbol->attrs().test(Attr::INTRINSIC) &&
!symbol->has<MiscDetails>() && useNames.count(name) == 0) {
SourceName location{x.moduleName.source};
if (auto *localSymbol{FindInScope(currScope(), name)}) {
DoAddUse(location, localSymbol->name(), *localSymbol, *symbol);
} else {
DoAddUse(location, location, CopySymbol(name, *symbol), *symbol);
}
}
}
}
useModuleScope_ = nullptr;
}
ModuleVisitor::SymbolRename ModuleVisitor::AddUse(
const SourceName &localName, const SourceName &useName) {
return AddUse(localName, useName, FindInScope(*useModuleScope_, useName));
}
ModuleVisitor::SymbolRename ModuleVisitor::AddUse(
const SourceName &localName, const SourceName &useName, Symbol *useSymbol) {
if (!useModuleScope_) {
return {}; // error occurred finding module
}
if (!useSymbol) {
Say(useName, "'%s' not found in module '%s'"_err_en_US, MakeOpName(useName),
useModuleScope_->GetName().value());
return {};
}
if (useSymbol->attrs().test(Attr::PRIVATE)) {
Say(useName, "'%s' is PRIVATE in '%s'"_err_en_US, MakeOpName(useName),
useModuleScope_->GetName().value());
return {};
}
auto &localSymbol{MakeSymbol(localName)};
DoAddUse(useName, localName, localSymbol, *useSymbol);
return {&localSymbol, useSymbol};
}
// symbol must be either a Use or a Generic formed by merging two uses.
// Convert it to a UseError with this additional location.
static void ConvertToUseError(
Symbol &symbol, const SourceName &location, const Scope &module) {
const auto *useDetails{symbol.detailsIf<UseDetails>()};
if (!useDetails) {
auto &genericDetails{symbol.get<GenericDetails>()};
useDetails = &genericDetails.uses().at(0)->get<UseDetails>();
}
symbol.set_details(
UseErrorDetails{*useDetails}.add_occurrence(location, module));
}
void ModuleVisitor::DoAddUse(const SourceName &location,
const SourceName &localName, Symbol &localSymbol, const Symbol &useSymbol) {
localSymbol.attrs() = useSymbol.attrs() & ~Attrs{Attr::PUBLIC, Attr::PRIVATE};
localSymbol.flags() = useSymbol.flags();
if (auto *useDetails{localSymbol.detailsIf<UseDetails>()}) {
const Symbol &ultimate{localSymbol.GetUltimate()};
if (ultimate == useSymbol.GetUltimate()) {
// use-associating the same symbol again -- ok
} else if (ultimate.has<GenericDetails>() &&
useSymbol.has<GenericDetails>()) {
// use-associating generics with the same names: merge them into a
// new generic in this scope
auto generic1{ultimate.get<GenericDetails>()};
AddGenericUse(generic1, localName, useSymbol);
generic1.AddUse(localSymbol);
// useSymbol has specific g and so does generic1
auto &generic2{useSymbol.get<GenericDetails>()};
if (generic1.derivedType() && generic2.derivedType() &&
generic1.derivedType() != generic2.derivedType()) {
Say(location,
"Generic interface '%s' has ambiguous derived types"
" from modules '%s' and '%s'"_err_en_US,
localSymbol.name(), GetUsedModule(*useDetails).name(),
useSymbol.owner().GetName().value());
context().SetError(localSymbol);
} else {
generic1.CopyFrom(generic2);
}
EraseSymbol(localSymbol);
MakeSymbol(localSymbol.name(), ultimate.attrs(), std::move(generic1));
} else {
ConvertToUseError(localSymbol, location, *useModuleScope_);
}
} else if (auto *genericDetails{localSymbol.detailsIf<GenericDetails>()}) {
if (const auto *useDetails{useSymbol.detailsIf<GenericDetails>()}) {
AddGenericUse(*genericDetails, localName, useSymbol);
if (genericDetails->derivedType() && useDetails->derivedType() &&
genericDetails->derivedType() != useDetails->derivedType()) {
Say(location,
"Generic interface '%s' has ambiguous derived types"
" from modules '%s' and '%s'"_err_en_US,
localSymbol.name(),
genericDetails->derivedType()->owner().GetName().value(),
useDetails->derivedType()->owner().GetName().value());
} else {
genericDetails->CopyFrom(*useDetails);
}
} else {
ConvertToUseError(localSymbol, location, *useModuleScope_);
}
} else if (auto *details{localSymbol.detailsIf<UseErrorDetails>()}) {
details->add_occurrence(location, *useModuleScope_);
} else if (!localSymbol.has<UnknownDetails>()) {
Say(location,
"Cannot use-associate '%s'; it is already declared in this scope"_err_en_US,
localName)
.Attach(localSymbol.name(), "Previous declaration of '%s'"_en_US,
localName);
} else {
localSymbol.set_details(UseDetails{localName, useSymbol});
}
}
void ModuleVisitor::AddUse(const GenericSpecInfo &info) {
if (useModuleScope_) {
const auto &name{info.symbolName()};
auto rename{
AddUse(name, name, info.FindInScope(context(), *useModuleScope_))};
info.Resolve(rename.use);
}
}
// Create a UseDetails symbol for this USE and add it to generic
void ModuleVisitor::AddGenericUse(
GenericDetails &generic, const SourceName &name, const Symbol &useSymbol) {
generic.AddUse(currScope().MakeSymbol(name, {}, UseDetails{name, useSymbol}));
}
bool ModuleVisitor::BeginSubmodule(
const parser::Name &name, const parser::ParentIdentifier &parentId) {
auto &ancestorName{std::get<parser::Name>(parentId.t)};
auto &parentName{std::get<std::optional<parser::Name>>(parentId.t)};
Scope *ancestor{FindModule(ancestorName)};
if (!ancestor) {
return false;
}
Scope *parentScope{parentName ? FindModule(*parentName, ancestor) : ancestor};
if (!parentScope) {
return false;
}
PushScope(*parentScope); // submodule is hosted in parent
BeginModule(name, true);
if (!ancestor->AddSubmodule(name.source, currScope())) {
Say(name, "Module '%s' already has a submodule named '%s'"_err_en_US,
ancestorName.source, name.source);
}
return true;
}
void ModuleVisitor::BeginModule(const parser::Name &name, bool isSubmodule) {
auto &symbol{MakeSymbol(name, ModuleDetails{isSubmodule})};
auto &details{symbol.get<ModuleDetails>()};
PushScope(Scope::Kind::Module, &symbol);
details.set_scope(&currScope());
defaultAccess_ = Attr::PUBLIC;
prevAccessStmt_ = std::nullopt;
}
// Find a module or submodule by name and return its scope.
// If ancestor is present, look for a submodule of that ancestor module.
// May have to read a .mod file to find it.
// If an error occurs, report it and return nullptr.
Scope *ModuleVisitor::FindModule(const parser::Name &name, Scope *ancestor) {
ModFileReader reader{context()};
Scope *scope{reader.Read(name.source, ancestor)};
if (!scope) {
return nullptr;
}
if (scope->kind() != Scope::Kind::Module) {
Say(name, "'%s' is not a module"_err_en_US);
return nullptr;
}
if (DoesScopeContain(scope, currScope())) { // 14.2.2(1)
Say(name, "Module '%s' cannot USE itself"_err_en_US);
}
Resolve(name, scope->symbol());
return scope;
}
void ModuleVisitor::ApplyDefaultAccess() {
for (auto &pair : currScope()) {
Symbol &symbol = *pair.second;
if (!symbol.attrs().HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
symbol.attrs().set(defaultAccess_);
}
}
}
// InterfaceVistor implementation
bool InterfaceVisitor::Pre(const parser::InterfaceStmt &x) {
bool isAbstract{std::holds_alternative<parser::Abstract>(x.u)};
genericInfo_.emplace(/*isInterface*/ true, isAbstract);
return BeginAttrs();
}
void InterfaceVisitor::Post(const parser::InterfaceStmt &) { EndAttrs(); }
void InterfaceVisitor::Post(const parser::EndInterfaceStmt &) {
genericInfo_.pop();
}
// Create a symbol in genericSymbol_ for this GenericSpec.
bool InterfaceVisitor::Pre(const parser::GenericSpec &x) {
if (auto *symbol{GenericSpecInfo{x}.FindInScope(context(), currScope())}) {
SetGenericSymbol(*symbol);
}
return false;
}
bool InterfaceVisitor::Pre(const parser::ProcedureStmt &x) {
if (!isGeneric()) {
Say("A PROCEDURE statement is only allowed in a generic interface block"_err_en_US);
return false;
}
auto kind{std::get<parser::ProcedureStmt::Kind>(x.t)};
const auto &names{std::get<std::list<parser::Name>>(x.t)};
AddSpecificProcs(names, kind);
return false;
}
bool InterfaceVisitor::Pre(const parser::GenericStmt &) {
genericInfo_.emplace(/*isInterface*/ false);
return true;
}
void InterfaceVisitor::Post(const parser::GenericStmt &x) {
if (auto &accessSpec{std::get<std::optional<parser::AccessSpec>>(x.t)}) {
GetGenericInfo().symbol->attrs().set(AccessSpecToAttr(*accessSpec));
}
const auto &names{std::get<std::list<parser::Name>>(x.t)};
AddSpecificProcs(names, ProcedureKind::Procedure);
genericInfo_.pop();
}
bool InterfaceVisitor::inInterfaceBlock() const {
return !genericInfo_.empty() && GetGenericInfo().isInterface;
}
bool InterfaceVisitor::isGeneric() const {
return !genericInfo_.empty() && GetGenericInfo().symbol;
}
bool InterfaceVisitor::isAbstract() const {
return !genericInfo_.empty() && GetGenericInfo().isAbstract;
}
GenericDetails &InterfaceVisitor::GetGenericDetails() {
return GetGenericInfo().symbol->get<GenericDetails>();
}
void InterfaceVisitor::AddSpecificProcs(
const std::list<parser::Name> &names, ProcedureKind kind) {
for (const auto &name : names) {
specificProcs_.emplace(
GetGenericInfo().symbol, std::make_pair(&name, kind));
}
}
// By now we should have seen all specific procedures referenced by name in
// this generic interface. Resolve those names to symbols.
void InterfaceVisitor::ResolveSpecificsInGeneric(Symbol &generic) {
auto &details{generic.get<GenericDetails>()};
SymbolSet symbolsSeen;
for (const Symbol &symbol : details.specificProcs()) {
symbolsSeen.insert(symbol);
}
auto range{specificProcs_.equal_range(&generic)};
for (auto it{range.first}; it != range.second; ++it) {
auto *name{it->second.first};
auto kind{it->second.second};
const auto *symbol{FindSymbol(*name)};
if (!symbol) {
Say(*name, "Procedure '%s' not found"_err_en_US);
continue;
}
symbol = &symbol->GetUltimate();
if (symbol == &generic) {
if (auto *specific{generic.get<GenericDetails>().specific()}) {
symbol = specific;
}
}
if (!symbol->has<SubprogramDetails>() &&
!symbol->has<SubprogramNameDetails>()) {
Say(*name, "'%s' is not a subprogram"_err_en_US);
continue;
}
if (kind == ProcedureKind::ModuleProcedure) {
if (const auto *nd{symbol->detailsIf<SubprogramNameDetails>()}) {
if (nd->kind() != SubprogramKind::Module) {
Say(*name, "'%s' is not a module procedure"_err_en_US);
}
} else {
// USE-associated procedure
const auto *sd{symbol->detailsIf<SubprogramDetails>()};
CHECK(sd);
if (symbol->owner().kind() != Scope::Kind::Module ||
sd->isInterface()) {
Say(*name, "'%s' is not a module procedure"_err_en_US);
}
}
}
if (!symbolsSeen.insert(*symbol).second) {
Say(name->source,
"Procedure '%s' is already specified in generic '%s'"_err_en_US,
name->source, MakeOpName(generic.name()));
continue;
}
details.AddSpecificProc(*symbol, name->source);
}
specificProcs_.erase(range.first, range.second);
}
// Check that the specific procedures are all functions or all subroutines.
// If there is a derived type with the same name they must be functions.
// Set the corresponding flag on generic.
void InterfaceVisitor::CheckGenericProcedures(Symbol &generic) {
ResolveSpecificsInGeneric(generic);
auto &details{generic.get<GenericDetails>()};
if (auto *proc{details.CheckSpecific()}) {
auto msg{
"'%s' may not be the name of both a generic interface and a"
" procedure unless it is a specific procedure of the generic"_err_en_US};
if (proc->name().begin() > generic.name().begin()) {
Say(proc->name(), std::move(msg));
} else {
Say(generic.name(), std::move(msg));
}
}
auto &specifics{details.specificProcs()};
if (specifics.empty()) {
if (details.derivedType()) {
generic.set(Symbol::Flag::Function);
}
return;
}
const Symbol &firstSpecific{specifics.front()};
bool isFunction{firstSpecific.test(Symbol::Flag::Function)};
for (const Symbol &specific : specifics) {
if (isFunction != specific.test(Symbol::Flag::Function)) { // C1514
auto &msg{Say(generic.name(),
"Generic interface '%s' has both a function and a subroutine"_err_en_US)};
if (isFunction) {
msg.Attach(firstSpecific.name(), "Function declaration"_en_US);
msg.Attach(specific.name(), "Subroutine declaration"_en_US);
} else {
msg.Attach(firstSpecific.name(), "Subroutine declaration"_en_US);
msg.Attach(specific.name(), "Function declaration"_en_US);
}
}
}
if (!isFunction && details.derivedType()) {
SayDerivedType(generic.name(),
"Generic interface '%s' may only contain functions due to derived type"
" with same name"_err_en_US,
*details.derivedType()->scope());
}
generic.set(isFunction ? Symbol::Flag::Function : Symbol::Flag::Subroutine);
}
// SubprogramVisitor implementation
// Return false if it is actually an assignment statement.
bool SubprogramVisitor::HandleStmtFunction(const parser::StmtFunctionStmt &x) {
const auto &name{std::get<parser::Name>(x.t)};
const DeclTypeSpec *resultType{nullptr};
// Look up name: provides return type or tells us if it's an array
if (auto *symbol{FindSymbol(name)}) {
auto *details{symbol->detailsIf<EntityDetails>()};
if (!details) {
badStmtFuncFound_ = true;
return false;
}
// TODO: check that attrs are compatible with stmt func
resultType = details->type();
symbol->details() = UnknownDetails{}; // will be replaced below
}
if (badStmtFuncFound_) {
Say(name, "'%s' has not been declared as an array"_err_en_US);
return true;
}
auto &symbol{PushSubprogramScope(name, Symbol::Flag::Function)};
symbol.set(Symbol::Flag::StmtFunction);
EraseSymbol(symbol); // removes symbol added by PushSubprogramScope
auto &details{symbol.get<SubprogramDetails>()};
for (const auto &dummyName : std::get<std::list<parser::Name>>(x.t)) {
ObjectEntityDetails dummyDetails{true};
if (auto *dummySymbol{FindInScope(currScope().parent(), dummyName)}) {
if (auto *d{dummySymbol->detailsIf<EntityDetails>()}) {
if (d->type()) {
dummyDetails.set_type(*d->type());
}
}
}
Symbol &dummy{MakeSymbol(dummyName, std::move(dummyDetails))};
ApplyImplicitRules(dummy);
details.add_dummyArg(dummy);
}
ObjectEntityDetails resultDetails;
if (resultType) {
resultDetails.set_type(*resultType);
}
resultDetails.set_funcResult(true);
Symbol &result{MakeSymbol(name, std::move(resultDetails))};
ApplyImplicitRules(result);
details.set_result(result);
const auto &parsedExpr{std::get<parser::Scalar<parser::Expr>>(x.t)};
Walk(parsedExpr);
// The analysis of the expression that constitutes the body of the
// statement function is deferred to FinishSpecificationPart() so that
// all declarations and implicit typing are complete.
PopScope();
return true;
}
bool SubprogramVisitor::Pre(const parser::Suffix &suffix) {
if (suffix.resultName) {
funcInfo_.resultName = &suffix.resultName.value();
}
return true;
}
bool SubprogramVisitor::Pre(const parser::PrefixSpec &x) {
// Save this to process after UseStmt and ImplicitPart
if (const auto *parsedType{std::get_if<parser::DeclarationTypeSpec>(&x.u)}) {
if (funcInfo_.parsedType) { // C1543
Say(currStmtSource().value(),
"FUNCTION prefix cannot specify the type more than once"_err_en_US);
return false;
} else {
funcInfo_.parsedType = parsedType;
funcInfo_.source = currStmtSource();
return false;
}
} else {
return true;
}
}
void SubprogramVisitor::Post(const parser::ImplicitPart &) {
// If the function has a type in the prefix, process it now
if (funcInfo_.parsedType) {
messageHandler().set_currStmtSource(funcInfo_.source);
if (const auto *type{ProcessTypeSpec(*funcInfo_.parsedType, true)}) {
funcInfo_.resultSymbol->SetType(*type);
}
}
funcInfo_ = {};
}
bool SubprogramVisitor::Pre(const parser::InterfaceBody::Subroutine &x) {
const auto &name{std::get<parser::Name>(
std::get<parser::Statement<parser::SubroutineStmt>>(x.t).statement.t)};
return BeginSubprogram(name, Symbol::Flag::Subroutine);
}
void SubprogramVisitor::Post(const parser::InterfaceBody::Subroutine &) {
EndSubprogram();
}
bool SubprogramVisitor::Pre(const parser::InterfaceBody::Function &x) {
const auto &name{std::get<parser::Name>(
std::get<parser::Statement<parser::FunctionStmt>>(x.t).statement.t)};
return BeginSubprogram(name, Symbol::Flag::Function);
}
void SubprogramVisitor::Post(const parser::InterfaceBody::Function &) {
EndSubprogram();
}
bool SubprogramVisitor::Pre(const parser::SubroutineStmt &) {
return BeginAttrs();
}
bool SubprogramVisitor::Pre(const parser::FunctionStmt &) {
return BeginAttrs();
}
bool SubprogramVisitor::Pre(const parser::EntryStmt &) { return BeginAttrs(); }
void SubprogramVisitor::Post(const parser::SubroutineStmt &stmt) {
const auto &name{std::get<parser::Name>(stmt.t)};
auto &details{PostSubprogramStmt(name)};
for (const auto &dummyArg : std::get<std::list<parser::DummyArg>>(stmt.t)) {
if (const auto *dummyName{std::get_if<parser::Name>(&dummyArg.u)}) {
Symbol &dummy{MakeSymbol(*dummyName, EntityDetails(true))};
details.add_dummyArg(dummy);
} else {
details.add_alternateReturn();
}
}
}
void SubprogramVisitor::Post(const parser::FunctionStmt &stmt) {
const auto &name{std::get<parser::Name>(stmt.t)};
auto &details{PostSubprogramStmt(name)};
for (const auto &dummyName : std::get<std::list<parser::Name>>(stmt.t)) {
Symbol &dummy{MakeSymbol(dummyName, EntityDetails(true))};
details.add_dummyArg(dummy);
}
const parser::Name *funcResultName;
if (funcInfo_.resultName && funcInfo_.resultName->source != name.source) {
// Note that RESULT is ignored if it has the same name as the function.
funcResultName = funcInfo_.resultName;
} else {
EraseSymbol(name); // was added by PushSubprogramScope
funcResultName = &name;
}
// add function result to function scope
EntityDetails funcResultDetails;
funcResultDetails.set_funcResult(true);
funcInfo_.resultSymbol =
&MakeSymbol(*funcResultName, std::move(funcResultDetails));
details.set_result(*funcInfo_.resultSymbol);
// C1560.
if (funcInfo_.resultName && funcInfo_.resultName->source == name.source) {
Say(funcInfo_.resultName->source,
"The function name should not appear in RESULT, references to '%s' "
"inside"
" the function will be considered as references to the result only"_en_US,
name.source);
// RESULT name was ignored above, the only side effect from doing so will be
// the inability to make recursive calls. The related parser::Name is still
// resolved to the created function result symbol because every parser::Name
// should be resolved to avoid internal errors.
Resolve(*funcInfo_.resultName, funcInfo_.resultSymbol);
}
name.symbol = currScope().symbol(); // must not be function result symbol
// Clear the RESULT() name now in case an ENTRY statement in the implicit-part
// has a RESULT() suffix.
funcInfo_.resultName = nullptr;
}
SubprogramDetails &SubprogramVisitor::PostSubprogramStmt(
const parser::Name &name) {
Symbol &symbol{*currScope().symbol()};
CHECK(name.source == symbol.name());
SetBindNameOn(symbol);
symbol.attrs() |= EndAttrs();
if (symbol.attrs().test(Attr::MODULE)) {
symbol.attrs().set(Attr::EXTERNAL, false);
}
return symbol.get<SubprogramDetails>();
}
void SubprogramVisitor::Post(const parser::EntryStmt &stmt) {
auto attrs{EndAttrs()}; // needs to be called even if early return
Scope &inclusiveScope{InclusiveScope()};
const Symbol *subprogram{inclusiveScope.symbol()};
if (!subprogram) {
CHECK(context().AnyFatalError());
return;
}
const auto &name{std::get<parser::Name>(stmt.t)};
const auto *parentDetails{subprogram->detailsIf<SubprogramDetails>()};
bool inFunction{parentDetails && parentDetails->isFunction()};
const parser::Name *resultName{funcInfo_.resultName};
if (resultName) { // RESULT(result) is present
funcInfo_.resultName = nullptr;
if (!inFunction) {
Say2(resultName->source,
"RESULT(%s) may appear only in a function"_err_en_US,
subprogram->name(), "Containing subprogram"_en_US);
} else if (resultName->source == subprogram->name()) { // C1574
Say2(resultName->source,
"RESULT(%s) may not have the same name as the function"_err_en_US,
subprogram->name(), "Containing function"_en_US);
} else if (const Symbol *
symbol{FindSymbol(inclusiveScope.parent(), *resultName)}) { // C1574
if (const auto *details{symbol->detailsIf<SubprogramDetails>()}) {
if (details->entryScope() == &inclusiveScope) {
Say2(resultName->source,
"RESULT(%s) may not have the same name as an ENTRY in the function"_err_en_US,
symbol->name(), "Conflicting ENTRY"_en_US);
}
}
}
if (Symbol * symbol{FindSymbol(name)}) { // C1570
// When RESULT() appears, ENTRY name can't have been already declared
if (inclusiveScope.Contains(symbol->owner())) {
Say2(name,
"ENTRY name '%s' may not be declared when RESULT() is present"_err_en_US,
*symbol, "Previous declaration of '%s'"_en_US);
}
}
if (resultName->source == name.source) {
// ignore RESULT() hereafter when it's the same name as the ENTRY
resultName = nullptr;
}
}
SubprogramDetails entryDetails;
entryDetails.set_entryScope(inclusiveScope);
if (inFunction) {
// Create the entity to hold the function result, if necessary.
Symbol *resultSymbol{nullptr};
auto &effectiveResultName{*(resultName ? resultName : &name)};
resultSymbol = FindInScope(currScope(), effectiveResultName);
if (resultSymbol) { // C1574
std::visit(
common::visitors{[](EntityDetails &x) { x.set_funcResult(true); },
[](ObjectEntityDetails &x) { x.set_funcResult(true); },
[](ProcEntityDetails &x) { x.set_funcResult(true); },
[&](const auto &) {
Say2(effectiveResultName.source,
"'%s' was previously declared as an item that may not be used as a function result"_err_en_US,
resultSymbol->name(), "Previous declaration of '%s'"_en_US);
}},
resultSymbol->details());
} else if (inExecutionPart_) {
ObjectEntityDetails entity;
entity.set_funcResult(true);
resultSymbol = &MakeSymbol(effectiveResultName, std::move(entity));
ApplyImplicitRules(*resultSymbol);
} else {
EntityDetails entity;
entity.set_funcResult(true);
resultSymbol = &MakeSymbol(effectiveResultName, std::move(entity));
}
if (!resultName) {
name.symbol = nullptr; // symbol will be used for entry point below
}
entryDetails.set_result(*resultSymbol);
}
for (const auto &dummyArg : std::get<std::list<parser::DummyArg>>(stmt.t)) {
if (const auto *dummyName{std::get_if<parser::Name>(&dummyArg.u)}) {
Symbol *dummy{FindSymbol(*dummyName)};
if (dummy) {
std::visit(
common::visitors{[](EntityDetails &x) { x.set_isDummy(); },
[](ObjectEntityDetails &x) { x.set_isDummy(); },
[](ProcEntityDetails &x) { x.set_isDummy(); },
[&](const auto &) {
Say2(dummyName->source,
"ENTRY dummy argument '%s' is previously declared as an item that may not be used as a dummy argument"_err_en_US,
dummy->name(), "Previous declaration of '%s'"_en_US);
}},
dummy->details());
} else {
dummy = &MakeSymbol(*dummyName, EntityDetails(true));
}
entryDetails.add_dummyArg(*dummy);
} else {
if (inFunction) { // C1573
Say(name,
"ENTRY in a function may not have an alternate return dummy argument"_err_en_US);
break;
}
entryDetails.add_alternateReturn();
}
}
Symbol::Flag subpFlag{
inFunction ? Symbol::Flag::Function : Symbol::Flag::Subroutine};
CheckExtantExternal(name, subpFlag);
Scope &outer{inclusiveScope.parent()}; // global or module scope
if (Symbol * extant{FindSymbol(outer, name)}) {
if (extant->has<ProcEntityDetails>()) {
if (!extant->test(subpFlag)) {
Say2(name,
subpFlag == Symbol::Flag::Function
? "'%s' was previously called as a subroutine"_err_en_US
: "'%s' was previously called as a function"_err_en_US,
*extant, "Previous call of '%s'"_en_US);
}
if (extant->attrs().test(Attr::PRIVATE)) {
attrs.set(Attr::PRIVATE);
}
outer.erase(extant->name());
} else {
if (outer.IsGlobal()) {
Say2(name, "'%s' is already defined as a global identifier"_err_en_US,
*extant, "Previous definition of '%s'"_en_US);
} else {
SayAlreadyDeclared(name, *extant);
}
return;
}
}
if (outer.IsModule() && !attrs.test(Attr::PRIVATE)) {
attrs.set(Attr::PUBLIC);
}
Symbol &entrySymbol{MakeSymbol(outer, name.source, attrs)};
entrySymbol.set_details(std::move(entryDetails));
if (outer.IsGlobal()) {
MakeExternal(entrySymbol);
}
SetBindNameOn(entrySymbol);
entrySymbol.set(subpFlag);
Resolve(name, entrySymbol);
}
// A subprogram declared with MODULE PROCEDURE
bool SubprogramVisitor::BeginMpSubprogram(const parser::Name &name) {
auto *symbol{FindSymbol(name)};
if (symbol && symbol->has<SubprogramNameDetails>()) {
symbol = FindSymbol(currScope().parent(), name);
}
if (!IsSeparateModuleProcedureInterface(symbol)) {
Say(name, "'%s' was not declared a separate module procedure"_err_en_US);
return false;
}
if (symbol->owner() == currScope()) {
PushScope(Scope::Kind::Subprogram, symbol);
} else {
Symbol &newSymbol{MakeSymbol(name, SubprogramDetails{})};
PushScope(Scope::Kind::Subprogram, &newSymbol);
const auto &details{symbol->get<SubprogramDetails>()};
auto &newDetails{newSymbol.get<SubprogramDetails>()};
for (const Symbol *dummyArg : details.dummyArgs()) {
if (!dummyArg) {
newDetails.add_alternateReturn();
} else if (Symbol * copy{currScope().CopySymbol(*dummyArg)}) {
newDetails.add_dummyArg(*copy);
}
}
if (details.isFunction()) {
currScope().erase(symbol->name());
newDetails.set_result(*currScope().CopySymbol(details.result()));
}
}
return true;
}
// A subprogram declared with SUBROUTINE or FUNCTION
bool SubprogramVisitor::BeginSubprogram(
const parser::Name &name, Symbol::Flag subpFlag, bool hasModulePrefix) {
if (hasModulePrefix && !inInterfaceBlock() &&
!IsSeparateModuleProcedureInterface(
FindSymbol(currScope().parent(), name))) {
Say(name, "'%s' was not declared a separate module procedure"_err_en_US);
return false;
}
PushSubprogramScope(name, subpFlag);
return true;
}
void SubprogramVisitor::EndSubprogram() { PopScope(); }
void SubprogramVisitor::CheckExtantExternal(
const parser::Name &name, Symbol::Flag subpFlag) {
if (auto *prev{FindSymbol(name)}) {
if (prev->attrs().test(Attr::EXTERNAL) && prev->has<ProcEntityDetails>()) {
// this subprogram was previously called, now being declared
if (!prev->test(subpFlag)) {
Say2(name,
subpFlag == Symbol::Flag::Function
? "'%s' was previously called as a subroutine"_err_en_US
: "'%s' was previously called as a function"_err_en_US,
*prev, "Previous call of '%s'"_en_US);
}
EraseSymbol(name);
}
}
}
Symbol &SubprogramVisitor::PushSubprogramScope(
const parser::Name &name, Symbol::Flag subpFlag) {
auto *symbol{GetSpecificFromGeneric(name)};
if (!symbol) {
CheckExtantExternal(name, subpFlag);
symbol = &MakeSymbol(name, SubprogramDetails{});
}
symbol->set(subpFlag);
PushScope(Scope::Kind::Subprogram, symbol);
auto &details{symbol->get<SubprogramDetails>()};
if (inInterfaceBlock()) {
details.set_isInterface();
if (!isAbstract()) {
MakeExternal(*symbol);
}
if (isGeneric()) {
GetGenericDetails().AddSpecificProc(*symbol, name.source);
}
set_inheritFromParent(false);
}
FindSymbol(name)->set(subpFlag); // PushScope() created symbol
return *symbol;
}
void SubprogramVisitor::PushBlockDataScope(const parser::Name &name) {
if (auto *prev{FindSymbol(name)}) {
if (prev->attrs().test(Attr::EXTERNAL) && prev->has<ProcEntityDetails>()) {
if (prev->test(Symbol::Flag::Subroutine) ||
prev->test(Symbol::Flag::Function)) {
Say2(name, "BLOCK DATA '%s' has been called"_err_en_US, *prev,
"Previous call of '%s'"_en_US);
}
EraseSymbol(name);
}
}
if (name.source.empty()) {
// Don't let unnamed BLOCK DATA conflict with unnamed PROGRAM
PushScope(Scope::Kind::BlockData, nullptr);
} else {
PushScope(Scope::Kind::BlockData, &MakeSymbol(name, SubprogramDetails{}));
}
}
// If name is a generic, return specific subprogram with the same name.
Symbol *SubprogramVisitor::GetSpecificFromGeneric(const parser::Name &name) {
if (auto *symbol{FindSymbol(name)}) {
if (auto *details{symbol->detailsIf<GenericDetails>()}) {
// found generic, want subprogram
auto *specific{details->specific()};
if (!specific) {
specific =
&currScope().MakeSymbol(name.source, Attrs{}, SubprogramDetails{});
details->set_specific(Resolve(name, *specific));
} else if (isGeneric()) {
SayAlreadyDeclared(name, *specific);
}
if (!specific->has<SubprogramDetails>()) {
specific->set_details(SubprogramDetails{});
}
return specific;
}
}
return nullptr;
}
// DeclarationVisitor implementation
bool DeclarationVisitor::BeginDecl() {
BeginDeclTypeSpec();
BeginArraySpec();
return BeginAttrs();
}
void DeclarationVisitor::EndDecl() {
EndDeclTypeSpec();
EndArraySpec();
EndAttrs();
}
bool DeclarationVisitor::CheckUseError(const parser::Name &name) {
const auto *details{name.symbol->detailsIf<UseErrorDetails>()};
if (!details) {
return false;
}
Message &msg{Say(name, "Reference to '%s' is ambiguous"_err_en_US)};
for (const auto &[location, module] : details->occurrences()) {
msg.Attach(location, "'%s' was use-associated from module '%s'"_en_US,
name.source, module->GetName().value());
}
return true;
}
// Report error if accessibility of symbol doesn't match isPrivate.
void DeclarationVisitor::CheckAccessibility(
const SourceName &name, bool isPrivate, Symbol &symbol) {
if (symbol.attrs().test(Attr::PRIVATE) != isPrivate) {
Say2(name,
"'%s' does not have the same accessibility as its previous declaration"_err_en_US,
symbol, "Previous declaration of '%s'"_en_US);
}
}
void DeclarationVisitor::Post(const parser::TypeDeclarationStmt &) {
if (!GetAttrs().HasAny({Attr::POINTER, Attr::ALLOCATABLE})) { // C702
if (const auto *typeSpec{GetDeclTypeSpec()}) {
if (typeSpec->category() == DeclTypeSpec::Character) {
if (typeSpec->characterTypeSpec().length().isDeferred()) {
Say("The type parameter LEN cannot be deferred without"
" the POINTER or ALLOCATABLE attribute"_err_en_US);
}
} else if (const DerivedTypeSpec * derivedSpec{typeSpec->AsDerived()}) {
for (const auto &pair : derivedSpec->parameters()) {
if (pair.second.isDeferred()) {
Say(currStmtSource().value(),
"The value of type parameter '%s' cannot be deferred"
" without the POINTER or ALLOCATABLE attribute"_err_en_US,
pair.first);
}
}
}
}
}
EndDecl();
}
void DeclarationVisitor::Post(const parser::DimensionStmt::Declaration &x) {
DeclareObjectEntity(std::get<parser::Name>(x.t));
}
void DeclarationVisitor::Post(const parser::CodimensionDecl &x) {
DeclareObjectEntity(std::get<parser::Name>(x.t));
}
bool DeclarationVisitor::Pre(const parser::Initialization &) {
// Defer inspection of initializers to Initialization() so that the
// symbol being initialized will be available within the initialization
// expression.
return false;
}
void DeclarationVisitor::Post(const parser::EntityDecl &x) {
// TODO: may be under StructureStmt
const auto &name{std::get<parser::ObjectName>(x.t)};
Attrs attrs{attrs_ ? HandleSaveName(name.source, *attrs_) : Attrs{}};
Symbol &symbol{DeclareUnknownEntity(name, attrs)};
symbol.ReplaceName(name.source);
if (auto &init{std::get<std::optional<parser::Initialization>>(x.t)}) {
if (ConvertToObjectEntity(symbol)) {
Initialization(name, *init, false);
}
} else if (attrs.test(Attr::PARAMETER)) { // C882, C883
Say(name, "Missing initialization for parameter '%s'"_err_en_US);
}
}
void DeclarationVisitor::Post(const parser::PointerDecl &x) {
const auto &name{std::get<parser::Name>(x.t)};
Symbol &symbol{DeclareUnknownEntity(name, Attrs{Attr::POINTER})};
symbol.ReplaceName(name.source);
}
bool DeclarationVisitor::Pre(const parser::BindEntity &x) {
auto kind{std::get<parser::BindEntity::Kind>(x.t)};
auto &name{std::get<parser::Name>(x.t)};
Symbol *symbol;
if (kind == parser::BindEntity::Kind::Object) {
symbol = &HandleAttributeStmt(Attr::BIND_C, name);
} else {
symbol = &MakeCommonBlockSymbol(name);
symbol->attrs().set(Attr::BIND_C);
}
SetBindNameOn(*symbol);
return false;
}
bool DeclarationVisitor::Pre(const parser::NamedConstantDef &x) {
auto &name{std::get<parser::NamedConstant>(x.t).v};
auto &symbol{HandleAttributeStmt(Attr::PARAMETER, name)};
if (!ConvertToObjectEntity(symbol) ||
symbol.test(Symbol::Flag::CrayPointer) ||
symbol.test(Symbol::Flag::CrayPointee)) {
SayWithDecl(
name, symbol, "PARAMETER attribute not allowed on '%s'"_err_en_US);
return false;
}
const auto &expr{std::get<parser::ConstantExpr>(x.t)};
ApplyImplicitRules(symbol);
Walk(expr);
if (auto converted{EvaluateNonPointerInitializer(
symbol, expr, expr.thing.value().source)}) {
symbol.get<ObjectEntityDetails>().set_init(std::move(*converted));
}
return false;
}
bool DeclarationVisitor::Pre(const parser::NamedConstant &x) {
const parser::Name &name{x.v};
if (!FindSymbol(name)) {
Say(name, "Named constant '%s' not found"_err_en_US);
} else {
CheckUseError(name);
}
return false;
}
bool DeclarationVisitor::Pre(const parser::Enumerator &enumerator) {
const parser::Name &name{std::get<parser::NamedConstant>(enumerator.t).v};
Symbol *symbol{FindSymbol(name)};
if (symbol) {
// Contrary to named constants appearing in a PARAMETER statement,
// enumerator names should not have their type, dimension or any other
// attributes defined before they are declared in the enumerator statement.
// This is not explicitly forbidden by the standard, but they are scalars
// which type is left for the compiler to chose, so do not let users try to
// tamper with that.
SayAlreadyDeclared(name, *symbol);
symbol = nullptr;
} else {
// Enumerators are treated as PARAMETER (section 7.6 paragraph (4))
symbol = &MakeSymbol(name, Attrs{Attr::PARAMETER}, ObjectEntityDetails{});
symbol->SetType(context().MakeNumericType(
TypeCategory::Integer, evaluate::CInteger::kind));
}
if (auto &init{std::get<std::optional<parser::ScalarIntConstantExpr>>(
enumerator.t)}) {
Walk(*init); // Resolve names in expression before evaluation.
if (auto value{EvaluateInt64(context(), *init)}) {
// Cast all init expressions to C_INT so that they can then be
// safely incremented (see 7.6 Note 2).
enumerationState_.value = static_cast<int>(*value);
} else {
Say(name,
"Enumerator value could not be computed "
"from the given expression"_err_en_US);
// Prevent resolution of next enumerators value
enumerationState_.value = std::nullopt;
}
}
if (symbol) {
if (enumerationState_.value) {
symbol->get<ObjectEntityDetails>().set_init(SomeExpr{
evaluate::Expr<evaluate::CInteger>{*enumerationState_.value}});
} else {
context().SetError(*symbol);
}
}
if (enumerationState_.value) {
(*enumerationState_.value)++;
}
return false;
}
void DeclarationVisitor::Post(const parser::EnumDef &) {
enumerationState_ = EnumeratorState{};
}
bool DeclarationVisitor::Pre(const parser::AccessSpec &x) {
Attr attr{AccessSpecToAttr(x)};
if (!NonDerivedTypeScope().IsModule()) { // C817
Say(currStmtSource().value(),
"%s attribute may only appear in the specification part of a module"_err_en_US,
EnumToString(attr));
}
CheckAndSet(attr);
return false;
}
bool DeclarationVisitor::Pre(const parser::AsynchronousStmt &x) {
return HandleAttributeStmt(Attr::ASYNCHRONOUS, x.v);
}
bool DeclarationVisitor::Pre(const parser::ContiguousStmt &x) {
return HandleAttributeStmt(Attr::CONTIGUOUS, x.v);
}
bool DeclarationVisitor::Pre(const parser::ExternalStmt &x) {
HandleAttributeStmt(Attr::EXTERNAL, x.v);
for (const auto &name : x.v) {
auto *symbol{FindSymbol(name)};
if (!ConvertToProcEntity(*symbol)) {
SayWithDecl(
name, *symbol, "EXTERNAL attribute not allowed on '%s'"_err_en_US);
} else if (symbol->attrs().test(Attr::INTRINSIC)) { // C840
Say(symbol->name(),
"Symbol '%s' cannot have both INTRINSIC and EXTERNAL attributes"_err_en_US,
symbol->name());
}
}
return false;
}
bool DeclarationVisitor::Pre(const parser::IntentStmt &x) {
auto &intentSpec{std::get<parser::IntentSpec>(x.t)};
auto &names{std::get<std::list<parser::Name>>(x.t)};
return CheckNotInBlock("INTENT") && // C1107
HandleAttributeStmt(IntentSpecToAttr(intentSpec), names);
}
bool DeclarationVisitor::Pre(const parser::IntrinsicStmt &x) {
HandleAttributeStmt(Attr::INTRINSIC, x.v);
for (const auto &name : x.v) {
auto *symbol{FindSymbol(name)};
if (!ConvertToProcEntity(*symbol)) {
SayWithDecl(
name, *symbol, "INTRINSIC attribute not allowed on '%s'"_err_en_US);
} else if (symbol->attrs().test(Attr::EXTERNAL)) { // C840
Say(symbol->name(),
"Symbol '%s' cannot have both EXTERNAL and INTRINSIC attributes"_err_en_US,
symbol->name());
}
}
return false;
}
bool DeclarationVisitor::Pre(const parser::OptionalStmt &x) {
return CheckNotInBlock("OPTIONAL") && // C1107
HandleAttributeStmt(Attr::OPTIONAL, x.v);
}
bool DeclarationVisitor::Pre(const parser::ProtectedStmt &x) {
return HandleAttributeStmt(Attr::PROTECTED, x.v);
}
bool DeclarationVisitor::Pre(const parser::ValueStmt &x) {
return CheckNotInBlock("VALUE") && // C1107
HandleAttributeStmt(Attr::VALUE, x.v);
}
bool DeclarationVisitor::Pre(const parser::VolatileStmt &x) {
return HandleAttributeStmt(Attr::VOLATILE, x.v);
}
// Handle a statement that sets an attribute on a list of names.
bool DeclarationVisitor::HandleAttributeStmt(
Attr attr, const std::list<parser::Name> &names) {
for (const auto &name : names) {
HandleAttributeStmt(attr, name);
}
return false;
}
Symbol &DeclarationVisitor::HandleAttributeStmt(
Attr attr, const parser::Name &name) {
if (attr == Attr::INTRINSIC && !IsIntrinsic(name.source, std::nullopt)) {
Say(name.source, "'%s' is not a known intrinsic procedure"_err_en_US);
}
auto *symbol{FindInScope(currScope(), name)};
if (attr == Attr::ASYNCHRONOUS || attr == Attr::VOLATILE) {
// these can be set on a symbol that is host-assoc or use-assoc
if (!symbol &&
(currScope().kind() == Scope::Kind::Subprogram ||
currScope().kind() == Scope::Kind::Block)) {
if (auto *hostSymbol{FindSymbol(name)}) {
symbol = &MakeHostAssocSymbol(name, *hostSymbol);
}
}
} else if (symbol && symbol->has<UseDetails>()) {
Say(currStmtSource().value(),
"Cannot change %s attribute on use-associated '%s'"_err_en_US,
EnumToString(attr), name.source);
return *symbol;
}
if (!symbol) {
symbol = &MakeSymbol(name, EntityDetails{});
}
symbol->attrs().set(attr);
symbol->attrs() = HandleSaveName(name.source, symbol->attrs());
return *symbol;
}
// C1107
bool DeclarationVisitor::CheckNotInBlock(const char *stmt) {
if (currScope().kind() == Scope::Kind::Block) {
Say(MessageFormattedText{
"%s statement is not allowed in a BLOCK construct"_err_en_US, stmt});
return false;
} else {
return true;
}
}
void DeclarationVisitor::Post(const parser::ObjectDecl &x) {
CHECK(objectDeclAttr_);
const auto &name{std::get<parser::ObjectName>(x.t)};
DeclareObjectEntity(name, Attrs{*objectDeclAttr_});
}
// Declare an entity not yet known to be an object or proc.
Symbol &DeclarationVisitor::DeclareUnknownEntity(
const parser::Name &name, Attrs attrs) {
if (!arraySpec().empty() || !coarraySpec().empty()) {
return DeclareObjectEntity(name, attrs);
} else {
Symbol &symbol{DeclareEntity<EntityDetails>(name, attrs)};
if (auto *type{GetDeclTypeSpec()}) {
SetType(name, *type);
}
charInfo_.length.reset();
SetBindNameOn(symbol);
if (symbol.attrs().test(Attr::EXTERNAL)) {
ConvertToProcEntity(symbol);
}
return symbol;
}
}
Symbol &DeclarationVisitor::DeclareProcEntity(
const parser::Name &name, Attrs attrs, const ProcInterface &interface) {
Symbol &symbol{DeclareEntity<ProcEntityDetails>(name, attrs)};
if (auto *details{symbol.detailsIf<ProcEntityDetails>()}) {
if (details->IsInterfaceSet()) {
SayWithDecl(name, symbol,
"The interface for procedure '%s' has already been "
"declared"_err_en_US);
context().SetError(symbol);
} else {
if (interface.type()) {
symbol.set(Symbol::Flag::Function);
} else if (interface.symbol()) {
if (interface.symbol()->test(Symbol::Flag::Function)) {
symbol.set(Symbol::Flag::Function);
} else if (interface.symbol()->test(Symbol::Flag::Subroutine)) {
symbol.set(Symbol::Flag::Subroutine);
}
}
details->set_interface(interface);
SetBindNameOn(symbol);
SetPassNameOn(symbol);
}
}
return symbol;
}
Symbol &DeclarationVisitor::DeclareObjectEntity(
const parser::Name &name, Attrs attrs) {
Symbol &symbol{DeclareEntity<ObjectEntityDetails>(name, attrs)};
if (auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
if (auto *type{GetDeclTypeSpec()}) {
SetType(name, *type);
}
if (!arraySpec().empty()) {
if (details->IsArray()) {
if (!context().HasError(symbol)) {
Say(name,
"The dimensions of '%s' have already been declared"_err_en_US);
context().SetError(symbol);
}
} else {
details->set_shape(arraySpec());
}
}
if (!coarraySpec().empty()) {
if (details->IsCoarray()) {
if (!context().HasError(symbol)) {
Say(name,
"The codimensions of '%s' have already been declared"_err_en_US);
context().SetError(symbol);
}
} else {
details->set_coshape(coarraySpec());
}
}
SetBindNameOn(symbol);
}
ClearArraySpec();
ClearCoarraySpec();
charInfo_.length.reset();
return symbol;
}
void DeclarationVisitor::Post(const parser::IntegerTypeSpec &x) {
SetDeclTypeSpec(MakeNumericType(TypeCategory::Integer, x.v));
}
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Real &x) {
SetDeclTypeSpec(MakeNumericType(TypeCategory::Real, x.kind));
}
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Complex &x) {
SetDeclTypeSpec(MakeNumericType(TypeCategory::Complex, x.kind));
}
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Logical &x) {
SetDeclTypeSpec(MakeLogicalType(x.kind));
}
void DeclarationVisitor::Post(const parser::IntrinsicTypeSpec::Character &) {
if (!charInfo_.length) {
charInfo_.length = ParamValue{1, common::TypeParamAttr::Len};
}
if (!charInfo_.kind) {
charInfo_.kind =
KindExpr{context().GetDefaultKind(TypeCategory::Character)};
}
SetDeclTypeSpec(currScope().MakeCharacterType(
std::move(*charInfo_.length), std::move(*charInfo_.kind)));
charInfo_ = {};
}
void DeclarationVisitor::Post(const parser::CharSelector::LengthAndKind &x) {
charInfo_.kind = EvaluateSubscriptIntExpr(x.kind);
std::optional<std::int64_t> intKind{ToInt64(charInfo_.kind)};
if (intKind &&
!evaluate::IsValidKindOfIntrinsicType(
TypeCategory::Character, *intKind)) { // C715, C719
Say(currStmtSource().value(),
"KIND value (%jd) not valid for CHARACTER"_err_en_US, *intKind);
charInfo_.kind = std::nullopt; // prevent further errors
}
if (x.length) {
charInfo_.length = GetParamValue(*x.length, common::TypeParamAttr::Len);
}
}
void DeclarationVisitor::Post(const parser::CharLength &x) {
if (const auto *length{std::get_if<std::uint64_t>(&x.u)}) {
charInfo_.length = ParamValue{
static_cast<ConstantSubscript>(*length), common::TypeParamAttr::Len};
} else {
charInfo_.length = GetParamValue(
std::get<parser::TypeParamValue>(x.u), common::TypeParamAttr::Len);
}
}
void DeclarationVisitor::Post(const parser::LengthSelector &x) {
if (const auto *param{std::get_if<parser::TypeParamValue>(&x.u)}) {
charInfo_.length = GetParamValue(*param, common::TypeParamAttr::Len);
}
}
bool DeclarationVisitor::Pre(const parser::KindParam &x) {
if (const auto *kind{std::get_if<
parser::Scalar<parser::Integer<parser::Constant<parser::Name>>>>(
&x.u)}) {
const parser::Name &name{kind->thing.thing.thing};
if (!FindSymbol(name)) {
Say(name, "Parameter '%s' not found"_err_en_US);
}
}
return false;
}
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Type &) {
CHECK(GetDeclTypeSpecCategory() == DeclTypeSpec::Category::TypeDerived);
return true;
}
void DeclarationVisitor::Post(const parser::DeclarationTypeSpec::Type &type) {
const parser::Name &derivedName{std::get<parser::Name>(type.derived.t)};
if (const Symbol * derivedSymbol{derivedName.symbol}) {
CheckForAbstractType(*derivedSymbol); // C706
}
}
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Class &) {
SetDeclTypeSpecCategory(DeclTypeSpec::Category::ClassDerived);
return true;
}
void DeclarationVisitor::Post(
const parser::DeclarationTypeSpec::Class &parsedClass) {
const auto &typeName{std::get<parser::Name>(parsedClass.derived.t)};
if (auto spec{ResolveDerivedType(typeName)};
spec && !IsExtensibleType(&*spec)) { // C705
SayWithDecl(typeName, *typeName.symbol,
"Non-extensible derived type '%s' may not be used with CLASS"
" keyword"_err_en_US);
}
}
bool DeclarationVisitor::Pre(const parser::DeclarationTypeSpec::Record &) {
// TODO
return true;
}
void DeclarationVisitor::Post(const parser::DerivedTypeSpec &x) {
const auto &typeName{std::get<parser::Name>(x.t)};
auto spec{ResolveDerivedType(typeName)};
if (!spec) {
return;
}
bool seenAnyName{false};
for (const auto &typeParamSpec :
std::get<std::list<parser::TypeParamSpec>>(x.t)) {
const auto &optKeyword{
std::get<std::optional<parser::Keyword>>(typeParamSpec.t)};
std::optional<SourceName> name;
if (optKeyword) {
seenAnyName = true;
name = optKeyword->v.source;
} else if (seenAnyName) {
Say(typeName.source, "Type parameter value must have a name"_err_en_US);
continue;
}
const auto &value{std::get<parser::TypeParamValue>(typeParamSpec.t)};
// The expressions in a derived type specifier whose values define
// non-defaulted type parameters are evaluated (folded) in the enclosing
// scope. The KIND/LEN distinction is resolved later in
// DerivedTypeSpec::CookParameters().
ParamValue param{GetParamValue(value, common::TypeParamAttr::Kind)};
if (!param.isExplicit() || param.GetExplicit()) {
spec->AddRawParamValue(optKeyword, std::move(param));
}
}
// The DerivedTypeSpec *spec is used initially as a search key.
// If it turns out to have the same name and actual parameter
// value expressions as another DerivedTypeSpec in the current
// scope does, then we'll use that extant spec; otherwise, when this
// spec is distinct from all derived types previously instantiated
// in the current scope, this spec will be moved into that collection.
const auto &dtDetails{spec->typeSymbol().get<DerivedTypeDetails>()};
auto category{GetDeclTypeSpecCategory()};
if (dtDetails.isForwardReferenced()) {
DeclTypeSpec &type{currScope().MakeDerivedType(category, std::move(*spec))};
SetDeclTypeSpec(type);
return;
}
// Normalize parameters to produce a better search key.
spec->CookParameters(GetFoldingContext());
if (!spec->MightBeParameterized()) {
spec->EvaluateParameters(context());
}
if (const DeclTypeSpec *
extant{currScope().FindInstantiatedDerivedType(*spec, category)}) {
// This derived type and parameter expressions (if any) are already present
// in this scope.
SetDeclTypeSpec(*extant);
} else {
DeclTypeSpec &type{currScope().MakeDerivedType(category, std::move(*spec))};
DerivedTypeSpec &derived{type.derivedTypeSpec()};
if (derived.MightBeParameterized() &&
currScope().IsParameterizedDerivedType()) {
// Defer instantiation; use the derived type's definition's scope.
derived.set_scope(DEREF(spec->typeSymbol().scope()));
} else {
auto restorer{
GetFoldingContext().messages().SetLocation(currStmtSource().value())};
derived.Instantiate(currScope(), context());
}
SetDeclTypeSpec(type);
}
// Capture the DerivedTypeSpec in the parse tree for use in building
// structure constructor expressions.
x.derivedTypeSpec = &GetDeclTypeSpec()->derivedTypeSpec();
}
// The descendents of DerivedTypeDef in the parse tree are visited directly
// in this Pre() routine so that recursive use of the derived type can be
// supported in the components.
bool DeclarationVisitor::Pre(const parser::DerivedTypeDef &x) {
auto &stmt{std::get<parser::Statement<parser::DerivedTypeStmt>>(x.t)};
Walk(stmt);
Walk(std::get<std::list<parser::Statement<parser::TypeParamDefStmt>>>(x.t));
auto &scope{currScope()};
CHECK(scope.symbol());
CHECK(scope.symbol()->scope() == &scope);
auto &details{scope.symbol()->get<DerivedTypeDetails>()};
std::set<SourceName> paramNames;
for (auto &paramName : std::get<std::list<parser::Name>>(stmt.statement.t)) {
details.add_paramName(paramName.source);
auto *symbol{FindInScope(scope, paramName)};
if (!symbol) {
Say(paramName,
"No definition found for type parameter '%s'"_err_en_US); // C742
// No symbol for a type param. Create one and mark it as containing an
// error to improve subsequent semantic processing
BeginAttrs();
Symbol *typeParam{MakeTypeSymbol(
paramName, TypeParamDetails{common::TypeParamAttr::Len})};
context().SetError(*typeParam);
EndAttrs();
} else if (!symbol->has<TypeParamDetails>()) {
Say2(paramName, "'%s' is not defined as a type parameter"_err_en_US,
*symbol, "Definition of '%s'"_en_US); // C741
}
if (!paramNames.insert(paramName.source).second) {
Say(paramName,
"Duplicate type parameter name: '%s'"_err_en_US); // C731
}
}
for (const auto &[name, symbol] : currScope()) {
if (symbol->has<TypeParamDetails>() && !paramNames.count(name)) {
SayDerivedType(name,
"'%s' is not a type parameter of this derived type"_err_en_US,
currScope()); // C741
}
}
Walk(std::get<std::list<parser::Statement<parser::PrivateOrSequence>>>(x.t));
const auto &componentDefs{
std::get<std::list<parser::Statement<parser::ComponentDefStmt>>>(x.t)};
Walk(componentDefs);
if (derivedTypeInfo_.sequence) {
details.set_sequence(true);
if (componentDefs.empty()) { // C740
Say(stmt.source,
"A sequence type must have at least one component"_err_en_US);
}
if (!details.paramNames().empty()) { // C740
Say(stmt.source,
"A sequence type may not have type parameters"_err_en_US);
}
if (derivedTypeInfo_.extends) { // C735
Say(stmt.source,
"A sequence type may not have the EXTENDS attribute"_err_en_US);
} else {
for (const auto &componentName : details.componentNames()) {
const Symbol *componentSymbol{scope.FindComponent(componentName)};
if (componentSymbol && componentSymbol->has<ObjectEntityDetails>()) {
const auto &componentDetails{
componentSymbol->get<ObjectEntityDetails>()};
const DeclTypeSpec *componentType{componentDetails.type()};
if (componentType && // C740
!componentType->AsIntrinsic() &&
!componentType->IsSequenceType()) {
Say(componentSymbol->name(),
"A sequence type data component must either be of an"
" intrinsic type or a derived sequence type"_err_en_US);
}
}
}
}
}
Walk(std::get<std::optional<parser::TypeBoundProcedurePart>>(x.t));
Walk(std::get<parser::Statement<parser::EndTypeStmt>>(x.t));
derivedTypeInfo_ = {};
PopScope();
return false;
}
bool DeclarationVisitor::Pre(const parser::DerivedTypeStmt &) {
return BeginAttrs();
}
void DeclarationVisitor::Post(const parser::DerivedTypeStmt &x) {
auto &name{std::get<parser::Name>(x.t)};
// Resolve the EXTENDS() clause before creating the derived
// type's symbol to foil attempts to recursively extend a type.
auto *extendsName{derivedTypeInfo_.extends};
std::optional<DerivedTypeSpec> extendsType{
ResolveExtendsType(name, extendsName)};
auto &symbol{MakeSymbol(name, GetAttrs(), DerivedTypeDetails{})};
symbol.ReplaceName(name.source);
derivedTypeInfo_.type = &symbol;
PushScope(Scope::Kind::DerivedType, &symbol);
if (extendsType) {
// Declare the "parent component"; private if the type is.
// Any symbol stored in the EXTENDS() clause is temporarily
// hidden so that a new symbol can be created for the parent
// component without producing spurious errors about already
// existing.
const Symbol &extendsSymbol{extendsType->typeSymbol()};
auto restorer{common::ScopedSet(extendsName->symbol, nullptr)};
if (OkToAddComponent(*extendsName, &extendsSymbol)) {
auto &comp{DeclareEntity<ObjectEntityDetails>(*extendsName, Attrs{})};
comp.attrs().set(
Attr::PRIVATE, extendsSymbol.attrs().test(Attr::PRIVATE));
comp.set(Symbol::Flag::ParentComp);
DeclTypeSpec &type{currScope().MakeDerivedType(
DeclTypeSpec::TypeDerived, std::move(*extendsType))};
type.derivedTypeSpec().set_scope(*extendsSymbol.scope());
comp.SetType(type);
DerivedTypeDetails &details{symbol.get<DerivedTypeDetails>()};
details.add_component(comp);
}
}
EndAttrs();
}
void DeclarationVisitor::Post(const parser::TypeParamDefStmt &x) {
auto *type{GetDeclTypeSpec()};
auto attr{std::get<common::TypeParamAttr>(x.t)};
for (auto &decl : std::get<std::list<parser::TypeParamDecl>>(x.t)) {
auto &name{std::get<parser::Name>(decl.t)};
if (Symbol * symbol{MakeTypeSymbol(name, TypeParamDetails{attr})}) {
SetType(name, *type);
if (auto &init{
std::get<std::optional<parser::ScalarIntConstantExpr>>(decl.t)}) {
if (auto maybeExpr{EvaluateNonPointerInitializer(
*symbol, *init, init->thing.thing.thing.value().source)}) {
if (auto *intExpr{std::get_if<SomeIntExpr>(&maybeExpr->u)}) {
symbol->get<TypeParamDetails>().set_init(std::move(*intExpr));
}
}
}
}
}
EndDecl();
}
bool DeclarationVisitor::Pre(const parser::TypeAttrSpec::Extends &x) {
if (derivedTypeInfo_.extends) {
Say(currStmtSource().value(),
"Attribute 'EXTENDS' cannot be used more than once"_err_en_US);
} else {
derivedTypeInfo_.extends = &x.v;
}
return false;
}
bool DeclarationVisitor::Pre(const parser::PrivateStmt &) {
if (!currScope().parent().IsModule()) {
Say("PRIVATE is only allowed in a derived type that is"
" in a module"_err_en_US); // C766
} else if (derivedTypeInfo_.sawContains) {
derivedTypeInfo_.privateBindings = true;
} else if (!derivedTypeInfo_.privateComps) {
derivedTypeInfo_.privateComps = true;
} else {
Say("PRIVATE may not appear more than once in"
" derived type components"_en_US); // C738
}
return false;
}
bool DeclarationVisitor::Pre(const parser::SequenceStmt &) {
if (derivedTypeInfo_.sequence) {
Say("SEQUENCE may not appear more than once in"
" derived type components"_en_US); // C738
}
derivedTypeInfo_.sequence = true;
return false;
}
void DeclarationVisitor::Post(const parser::ComponentDecl &x) {
const auto &name{std::get<parser::Name>(x.t)};
auto attrs{GetAttrs()};
if (derivedTypeInfo_.privateComps &&
!attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
attrs.set(Attr::PRIVATE);
}
if (const auto *declType{GetDeclTypeSpec()}) {
if (const auto *derived{declType->AsDerived()}) {
if (!attrs.HasAny({Attr::POINTER, Attr::ALLOCATABLE})) {
if (derivedTypeInfo_.type == &derived->typeSymbol()) { // C744
Say("Recursive use of the derived type requires "
"POINTER or ALLOCATABLE"_err_en_US);
}
}
if (!coarraySpec().empty()) { // C747
if (IsTeamType(derived)) {
Say("A coarray component may not be of type TEAM_TYPE from "
"ISO_FORTRAN_ENV"_err_en_US);
} else {
if (IsIsoCType(derived)) {
Say("A coarray component may not be of type C_PTR or C_FUNPTR from "
"ISO_C_BINDING"_err_en_US);
}
}
}
if (auto it{FindCoarrayUltimateComponent(*derived)}) { // C748
std::string ultimateName{it.BuildResultDesignatorName()};
// Strip off the leading "%"
if (ultimateName.length() > 1) {
ultimateName.erase(0, 1);
if (attrs.HasAny({Attr::POINTER, Attr::ALLOCATABLE})) {
evaluate::AttachDeclaration(
Say(name.source,
"A component with a POINTER or ALLOCATABLE attribute may "
"not "
"be of a type with a coarray ultimate component (named "
"'%s')"_err_en_US,
ultimateName),
derived->typeSymbol());
}
if (!arraySpec().empty() || !coarraySpec().empty()) {
evaluate::AttachDeclaration(
Say(name.source,
"An array or coarray component may not be of a type with a "
"coarray ultimate component (named '%s')"_err_en_US,
ultimateName),
derived->typeSymbol());
}
}
}
}
}
if (OkToAddComponent(name)) {
auto &symbol{DeclareObjectEntity(name, attrs)};
if (symbol.has<ObjectEntityDetails>()) {
if (auto &init{std::get<std::optional<parser::Initialization>>(x.t)}) {
Initialization(name, *init, true);
}
}
currScope().symbol()->get<DerivedTypeDetails>().add_component(symbol);
}
ClearArraySpec();
ClearCoarraySpec();
}
bool DeclarationVisitor::Pre(const parser::ProcedureDeclarationStmt &) {
CHECK(!interfaceName_);
return BeginDecl();
}
void DeclarationVisitor::Post(const parser::ProcedureDeclarationStmt &) {
interfaceName_ = nullptr;
EndDecl();
}
bool DeclarationVisitor::Pre(const parser::DataComponentDefStmt &x) {
// Overrides parse tree traversal so as to handle attributes first,
// so POINTER & ALLOCATABLE enable forward references to derived types.
Walk(std::get<std::list<parser::ComponentAttrSpec>>(x.t));
set_allowForwardReferenceToDerivedType(
GetAttrs().HasAny({Attr::POINTER, Attr::ALLOCATABLE}));
Walk(std::get<parser::DeclarationTypeSpec>(x.t));
set_allowForwardReferenceToDerivedType(false);
Walk(std::get<std::list<parser::ComponentDecl>>(x.t));
return false;
}
bool DeclarationVisitor::Pre(const parser::ProcComponentDefStmt &) {
CHECK(!interfaceName_);
return true;
}
void DeclarationVisitor::Post(const parser::ProcComponentDefStmt &) {
interfaceName_ = nullptr;
}
bool DeclarationVisitor::Pre(const parser::ProcPointerInit &x) {
if (auto *name{std::get_if<parser::Name>(&x.u)}) {
return !NameIsKnownOrIntrinsic(*name);
}
return true;
}
void DeclarationVisitor::Post(const parser::ProcInterface &x) {
if (auto *name{std::get_if<parser::Name>(&x.u)}) {
interfaceName_ = name;
NoteInterfaceName(*name);
}
}
void DeclarationVisitor::Post(const parser::ProcDecl &x) {
const auto &name{std::get<parser::Name>(x.t)};
ProcInterface interface;
if (interfaceName_) {
interface.set_symbol(*interfaceName_->symbol);
} else if (auto *type{GetDeclTypeSpec()}) {
interface.set_type(*type);
}
auto attrs{HandleSaveName(name.source, GetAttrs())};
DerivedTypeDetails *dtDetails{nullptr};
if (Symbol * symbol{currScope().symbol()}) {
dtDetails = symbol->detailsIf<DerivedTypeDetails>();
}
if (!dtDetails) {
attrs.set(Attr::EXTERNAL);
}
Symbol &symbol{DeclareProcEntity(name, attrs, interface)};
symbol.ReplaceName(name.source);
if (dtDetails) {
dtDetails->add_component(symbol);
}
}
bool DeclarationVisitor::Pre(const parser::TypeBoundProcedurePart &) {
derivedTypeInfo_.sawContains = true;
return true;
}
// Resolve binding names from type-bound generics, saved in genericBindings_.
void DeclarationVisitor::Post(const parser::TypeBoundProcedurePart &) {
// track specifics seen for the current generic to detect duplicates:
const Symbol *currGeneric{nullptr};
std::set<SourceName> specifics;
for (const auto &[generic, bindingName] : genericBindings_) {
if (generic != currGeneric) {
currGeneric = generic;
specifics.clear();
}
auto [it, inserted]{specifics.insert(bindingName->source)};
if (!inserted) {
Say(*bindingName, // C773
"Binding name '%s' was already specified for generic '%s'"_err_en_US,
bindingName->source, generic->name())
.Attach(*it, "Previous specification of '%s'"_en_US, *it);
continue;
}
auto *symbol{FindInTypeOrParents(*bindingName)};
if (!symbol) {
Say(*bindingName, // C772
"Binding name '%s' not found in this derived type"_err_en_US);
} else if (!symbol->has<ProcBindingDetails>()) {
SayWithDecl(*bindingName, *symbol, // C772
"'%s' is not the name of a specific binding of this type"_err_en_US);
} else {
generic->get<GenericDetails>().AddSpecificProc(
*symbol, bindingName->source);
}
}
genericBindings_.clear();
}
void DeclarationVisitor::Post(const parser::ContainsStmt &) {
if (derivedTypeInfo_.sequence) {
Say("A sequence type may not have a CONTAINS statement"_err_en_US); // C740
}
}
void DeclarationVisitor::Post(
const parser::TypeBoundProcedureStmt::WithoutInterface &x) {
if (GetAttrs().test(Attr::DEFERRED)) { // C783
Say("DEFERRED is only allowed when an interface-name is provided"_err_en_US);
}
for (auto &declaration : x.declarations) {
auto &bindingName{std::get<parser::Name>(declaration.t)};
auto &optName{std::get<std::optional<parser::Name>>(declaration.t)};
const parser::Name &procedureName{optName ? *optName : bindingName};
Symbol *procedure{FindSymbol(procedureName)};
if (!procedure) {
procedure = NoteInterfaceName(procedureName);
}
if (auto *s{MakeTypeSymbol(bindingName, ProcBindingDetails{*procedure})}) {
SetPassNameOn(*s);
if (GetAttrs().test(Attr::DEFERRED)) {
context().SetError(*s);
}
}
}
}
void DeclarationVisitor::CheckBindings(
const parser::TypeBoundProcedureStmt::WithoutInterface &tbps) {
CHECK(currScope().IsDerivedType());
for (auto &declaration : tbps.declarations) {
auto &bindingName{std::get<parser::Name>(declaration.t)};
if (Symbol * binding{FindInScope(currScope(), bindingName)}) {
if (auto *details{binding->detailsIf<ProcBindingDetails>()}) {
const Symbol *procedure{FindSubprogram(details->symbol())};
if (!CanBeTypeBoundProc(procedure)) {
if (details->symbol().name() != binding->name()) {
Say(binding->name(),
"The binding of '%s' ('%s') must be either an accessible "
"module procedure or an external procedure with "
"an explicit interface"_err_en_US,
binding->name(), details->symbol().name());
} else {
Say(binding->name(),
"'%s' must be either an accessible module procedure "
"or an external procedure with an explicit interface"_err_en_US,
binding->name());
}
context().SetError(*binding);
}
}
}
}
}
void DeclarationVisitor::Post(
const parser::TypeBoundProcedureStmt::WithInterface &x) {
if (!GetAttrs().test(Attr::DEFERRED)) { // C783
Say("DEFERRED is required when an interface-name is provided"_err_en_US);
}
if (Symbol * interface{NoteInterfaceName(x.interfaceName)}) {
for (auto &bindingName : x.bindingNames) {
if (auto *s{
MakeTypeSymbol(bindingName, ProcBindingDetails{*interface})}) {
SetPassNameOn(*s);
if (!GetAttrs().test(Attr::DEFERRED)) {
context().SetError(*s);
}
}
}
}
}
void DeclarationVisitor::Post(const parser::FinalProcedureStmt &x) {
if (currScope().IsDerivedType() && currScope().symbol()) {
if (auto *details{currScope().symbol()->detailsIf<DerivedTypeDetails>()}) {
for (const auto &subrName : x.v) {
if (const auto *name{ResolveName(subrName)}) {
auto pair{
details->finals().emplace(name->source, DEREF(name->symbol))};
if (!pair.second) { // C787
Say(name->source,
"FINAL subroutine '%s' already appeared in this derived type"_err_en_US,
name->source)
.Attach(pair.first->first,
"earlier appearance of this FINAL subroutine"_en_US);
}
}
}
}
}
}
bool DeclarationVisitor::Pre(const parser::TypeBoundGenericStmt &x) {
const auto &accessSpec{std::get<std::optional<parser::AccessSpec>>(x.t)};
const auto &genericSpec{std::get<Indirection<parser::GenericSpec>>(x.t)};
const auto &bindingNames{std::get<std::list<parser::Name>>(x.t)};
auto info{GenericSpecInfo{genericSpec.value()}};
SourceName symbolName{info.symbolName()};
bool isPrivate{accessSpec ? accessSpec->v == parser::AccessSpec::Kind::Private
: derivedTypeInfo_.privateBindings};
auto *genericSymbol{info.FindInScope(context(), currScope())};
if (genericSymbol) {
if (!genericSymbol->has<GenericDetails>()) {
genericSymbol = nullptr; // MakeTypeSymbol will report the error below
}
} else {
// look in parent types:
Symbol *inheritedSymbol{nullptr};
for (const auto &name : info.GetAllNames(context())) {
inheritedSymbol = currScope().FindComponent(SourceName{name});
if (inheritedSymbol) {
break;
}
}
if (inheritedSymbol && inheritedSymbol->has<GenericDetails>()) {
CheckAccessibility(symbolName, isPrivate, *inheritedSymbol); // C771
}
}
if (genericSymbol) {
CheckAccessibility(symbolName, isPrivate, *genericSymbol); // C771
} else {
genericSymbol = MakeTypeSymbol(symbolName, GenericDetails{});
if (!genericSymbol) {
return false;
}
if (isPrivate) {
genericSymbol->attrs().set(Attr::PRIVATE);
}
}
for (const parser::Name &bindingName : bindingNames) {
genericBindings_.emplace(genericSymbol, &bindingName);
}
info.Resolve(genericSymbol);
return false;
}
bool DeclarationVisitor::Pre(const parser::AllocateStmt &) {
BeginDeclTypeSpec();
return true;
}
void DeclarationVisitor::Post(const parser::AllocateStmt &) {
EndDeclTypeSpec();
}
bool DeclarationVisitor::Pre(const parser::StructureConstructor &x) {
auto &parsedType{std::get<parser::DerivedTypeSpec>(x.t)};
const DeclTypeSpec *type{ProcessTypeSpec(parsedType)};
if (!type) {
return false;
}
const DerivedTypeSpec *spec{type->AsDerived()};
const Scope *typeScope{spec ? spec->scope() : nullptr};
if (!typeScope) {
return false;
}
// N.B C7102 is implicitly enforced by having inaccessible types not
// being found in resolution.
// More constraints are enforced in expression.cpp so that they
// can apply to structure constructors that have been converted
// from misparsed function references.
for (const auto &component :
std::get<std::list<parser::ComponentSpec>>(x.t)) {
// Visit the component spec expression, but not the keyword, since
// we need to resolve its symbol in the scope of the derived type.
Walk(std::get<parser::ComponentDataSource>(component.t));
if (const auto &kw{std::get<std::optional<parser::Keyword>>(component.t)}) {
FindInTypeOrParents(*typeScope, kw->v);
}
}
return false;
}
bool DeclarationVisitor::Pre(const parser::BasedPointerStmt &x) {
for (const parser::BasedPointer &bp : x.v) {
const parser::ObjectName &pointerName{std::get<0>(bp.t)};
const parser::ObjectName &pointeeName{std::get<1>(bp.t)};
auto *pointer{FindSymbol(pointerName)};
if (!pointer) {
pointer = &MakeSymbol(pointerName, ObjectEntityDetails{});
} else if (!ConvertToObjectEntity(*pointer) || IsNamedConstant(*pointer)) {
SayWithDecl(pointerName, *pointer, "'%s' is not a variable"_err_en_US);
} else if (pointer->Rank() > 0) {
SayWithDecl(pointerName, *pointer,
"Cray pointer '%s' must be a scalar"_err_en_US);
} else if (pointer->test(Symbol::Flag::CrayPointee)) {
Say(pointerName,
"'%s' cannot be a Cray pointer as it is already a Cray pointee"_err_en_US);
}
pointer->set(Symbol::Flag::CrayPointer);
const DeclTypeSpec &pointerType{MakeNumericType(TypeCategory::Integer,
context().defaultKinds().subscriptIntegerKind())};
const auto *type{pointer->GetType()};
if (!type) {
pointer->SetType(pointerType);
} else if (*type != pointerType) {
Say(pointerName.source, "Cray pointer '%s' must have type %s"_err_en_US,
pointerName.source, pointerType.AsFortran());
}
if (ResolveName(pointeeName)) {
Symbol &pointee{*pointeeName.symbol};
if (pointee.has<UseDetails>()) {
Say(pointeeName,
"'%s' cannot be a Cray pointee as it is use-associated"_err_en_US);
continue;
} else if (!ConvertToObjectEntity(pointee) || IsNamedConstant(pointee)) {
Say(pointeeName, "'%s' is not a variable"_err_en_US);
continue;
} else if (pointee.test(Symbol::Flag::CrayPointer)) {
Say(pointeeName,
"'%s' cannot be a Cray pointee as it is already a Cray pointer"_err_en_US);
} else if (pointee.test(Symbol::Flag::CrayPointee)) {
Say(pointeeName,
"'%s' was already declared as a Cray pointee"_err_en_US);
} else {
pointee.set(Symbol::Flag::CrayPointee);
}
if (const auto *pointeeType{pointee.GetType()}) {
if (const auto *derived{pointeeType->AsDerived()}) {
if (!derived->typeSymbol().get<DerivedTypeDetails>().sequence()) {
Say(pointeeName,
"Type of Cray pointee '%s' is a non-sequence derived type"_err_en_US);
}
}
}
// process the pointee array-spec, if present
BeginArraySpec();
Walk(std::get<std::optional<parser::ArraySpec>>(bp.t));
const auto &spec{arraySpec()};
if (!spec.empty()) {
auto &details{pointee.get<ObjectEntityDetails>()};
if (details.shape().empty()) {
details.set_shape(spec);
} else {
SayWithDecl(pointeeName, pointee,
"Array spec was already declared for '%s'"_err_en_US);
}
}
ClearArraySpec();
currScope().add_crayPointer(pointeeName.source, *pointer);
}
}
return false;
}
bool DeclarationVisitor::Pre(const parser::NamelistStmt::Group &x) {
if (!CheckNotInBlock("NAMELIST")) { // C1107
return false;
}
NamelistDetails details;
for (const auto &name : std::get<std::list<parser::Name>>(x.t)) {
auto *symbol{FindSymbol(name)};
if (!symbol) {
symbol = &MakeSymbol(name, ObjectEntityDetails{});
ApplyImplicitRules(*symbol);
} else if (!ConvertToObjectEntity(*symbol)) {
SayWithDecl(name, *symbol, "'%s' is not a variable"_err_en_US);
}
symbol->GetUltimate().set(Symbol::Flag::InNamelist);
details.add_object(*symbol);
}
const auto &groupName{std::get<parser::Name>(x.t)};
auto *groupSymbol{FindInScope(currScope(), groupName)};
if (!groupSymbol || !groupSymbol->has<NamelistDetails>()) {
groupSymbol = &MakeSymbol(groupName, std::move(details));
groupSymbol->ReplaceName(groupName.source);
}
groupSymbol->get<NamelistDetails>().add_objects(details.objects());
return false;
}
bool DeclarationVisitor::Pre(const parser::IoControlSpec &x) {
if (const auto *name{std::get_if<parser::Name>(&x.u)}) {
auto *symbol{FindSymbol(*name)};
if (!symbol) {
Say(*name, "Namelist group '%s' not found"_err_en_US);
} else if (!symbol->GetUltimate().has<NamelistDetails>()) {
SayWithDecl(
*name, *symbol, "'%s' is not the name of a namelist group"_err_en_US);
}
}
return true;
}
bool DeclarationVisitor::Pre(const parser::CommonStmt::Block &x) {
CheckNotInBlock("COMMON"); // C1107
return true;
}
bool DeclarationVisitor::Pre(const parser::CommonBlockObject &) {
BeginArraySpec();
return true;
}
void DeclarationVisitor::Post(const parser::CommonBlockObject &x) {
const auto &name{std::get<parser::Name>(x.t)};
DeclareObjectEntity(name);
auto pair{commonBlockObjects_.insert(name.source)};
if (!pair.second) {
const SourceName &prev{*pair.first};
Say2(name.source, "'%s' is already in a COMMON block"_err_en_US, prev,
"Previous occurrence of '%s' in a COMMON block"_en_US);
}
}
bool DeclarationVisitor::Pre(const parser::EquivalenceStmt &x) {
// save equivalence sets to be processed after specification part
CheckNotInBlock("EQUIVALENCE"); // C1107
for (const std::list<parser::EquivalenceObject> &set : x.v) {
equivalenceSets_.push_back(&set);
}
return false; // don't implicitly declare names yet
}
void DeclarationVisitor::CheckEquivalenceSets() {
EquivalenceSets equivSets{context()};
for (const auto *set : equivalenceSets_) {
const auto &source{set->front().v.value().source};
if (set->size() <= 1) { // R871
Say(source, "Equivalence set must have more than one object"_err_en_US);
}
for (const parser::EquivalenceObject &object : *set) {
const auto &designator{object.v.value()};
// The designator was not resolved when it was encountered so do it now.
// AnalyzeExpr causes array sections to be changed to substrings as needed
Walk(designator);
if (AnalyzeExpr(context(), designator)) {
equivSets.AddToSet(designator);
}
}
equivSets.FinishSet(source);
}
for (auto &set : equivSets.sets()) {
if (!set.empty()) {
currScope().add_equivalenceSet(std::move(set));
}
}
equivalenceSets_.clear();
}
bool DeclarationVisitor::Pre(const parser::SaveStmt &x) {
if (x.v.empty()) {
saveInfo_.saveAll = currStmtSource();
currScope().set_hasSAVE();
} else {
for (const parser::SavedEntity &y : x.v) {
auto kind{std::get<parser::SavedEntity::Kind>(y.t)};
const auto &name{std::get<parser::Name>(y.t)};
if (kind == parser::SavedEntity::Kind::Common) {
MakeCommonBlockSymbol(name);
AddSaveName(saveInfo_.commons, name.source);
} else {
HandleAttributeStmt(Attr::SAVE, name);
}
}
}
return false;
}
void DeclarationVisitor::CheckSaveStmts() {
for (const SourceName &name : saveInfo_.entities) {
auto *symbol{FindInScope(currScope(), name)};
if (!symbol) {
// error was reported
} else if (saveInfo_.saveAll) {
// C889 - note that pgi, ifort, xlf do not enforce this constraint
Say2(name,
"Explicit SAVE of '%s' is redundant due to global SAVE statement"_err_en_US,
*saveInfo_.saveAll, "Global SAVE statement"_en_US);
} else if (auto msg{CheckSaveAttr(*symbol)}) {
Say(name, std::move(*msg));
context().SetError(*symbol);
} else {
SetSaveAttr(*symbol);
}
}
for (const SourceName &name : saveInfo_.commons) {
if (auto *symbol{currScope().FindCommonBlock(name)}) {
auto &objects{symbol->get<CommonBlockDetails>().objects()};
if (objects.empty()) {
if (currScope().kind() != Scope::Kind::Block) {
Say(name,
"'%s' appears as a COMMON block in a SAVE statement but not in"
" a COMMON statement"_err_en_US);
} else { // C1108
Say(name,
"SAVE statement in BLOCK construct may not contain a"
" common block name '%s'"_err_en_US);
}
} else {
for (auto &object : symbol->get<CommonBlockDetails>().objects()) {
SetSaveAttr(*object);
}
}
}
}
if (saveInfo_.saveAll) {
// Apply SAVE attribute to applicable symbols
for (auto pair : currScope()) {
auto &symbol{*pair.second};
if (!CheckSaveAttr(symbol)) {
SetSaveAttr(symbol);
}
}
}
saveInfo_ = {};
}
// If SAVE attribute can't be set on symbol, return error message.
std::optional<MessageFixedText> DeclarationVisitor::CheckSaveAttr(
const Symbol &symbol) {
if (IsDummy(symbol)) {
return "SAVE attribute may not be applied to dummy argument '%s'"_err_en_US;
} else if (symbol.IsFuncResult()) {
return "SAVE attribute may not be applied to function result '%s'"_err_en_US;
} else if (symbol.has<ProcEntityDetails>() &&
!symbol.attrs().test(Attr::POINTER)) {
return "Procedure '%s' with SAVE attribute must also have POINTER attribute"_err_en_US;
} else if (IsAutomatic(symbol)) {
return "SAVE attribute may not be applied to automatic data object '%s'"_err_en_US;
} else {
return std::nullopt;
}
}
// Record SAVEd names in saveInfo_.entities.
Attrs DeclarationVisitor::HandleSaveName(const SourceName &name, Attrs attrs) {
if (attrs.test(Attr::SAVE)) {
AddSaveName(saveInfo_.entities, name);
}
return attrs;
}
// Record a name in a set of those to be saved.
void DeclarationVisitor::AddSaveName(
std::set<SourceName> &set, const SourceName &name) {
auto pair{set.insert(name)};
if (!pair.second) {
Say2(name, "SAVE attribute was already specified on '%s'"_err_en_US,
*pair.first, "Previous specification of SAVE attribute"_en_US);
}
}
// Set the SAVE attribute on symbol unless it is implicitly saved anyway.
void DeclarationVisitor::SetSaveAttr(Symbol &symbol) {
if (!IsSaved(symbol)) {
symbol.attrs().set(Attr::SAVE);
}
}
// Check types of common block objects, now that they are known.
void DeclarationVisitor::CheckCommonBlocks() {
// check for empty common blocks
for (const auto &pair : currScope().commonBlocks()) {
const auto &symbol{*pair.second};
if (symbol.get<CommonBlockDetails>().objects().empty() &&
symbol.attrs().test(Attr::BIND_C)) {
Say(symbol.name(),
"'%s' appears as a COMMON block in a BIND statement but not in"
" a COMMON statement"_err_en_US);
}
}
// check objects in common blocks
for (const auto &name : commonBlockObjects_) {
const auto *symbol{currScope().FindSymbol(name)};
if (!symbol) {
continue;
}
const auto &attrs{symbol->attrs()};
if (attrs.test(Attr::ALLOCATABLE)) {
Say(name,
"ALLOCATABLE object '%s' may not appear in a COMMON block"_err_en_US);
} else if (attrs.test(Attr::BIND_C)) {
Say(name,
"Variable '%s' with BIND attribute may not appear in a COMMON block"_err_en_US);
} else if (IsDummy(*symbol)) {
Say(name,
"Dummy argument '%s' may not appear in a COMMON block"_err_en_US);
} else if (symbol->IsFuncResult()) {
Say(name,
"Function result '%s' may not appear in a COMMON block"_err_en_US);
} else if (const DeclTypeSpec * type{symbol->GetType()}) {
if (type->category() == DeclTypeSpec::ClassStar) {
Say(name,
"Unlimited polymorphic pointer '%s' may not appear in a COMMON block"_err_en_US);
} else if (const auto *derived{type->AsDerived()}) {
auto &typeSymbol{derived->typeSymbol()};
if (!typeSymbol.attrs().test(Attr::BIND_C) &&
!typeSymbol.get<DerivedTypeDetails>().sequence()) {
Say(name,
"Derived type '%s' in COMMON block must have the BIND or"
" SEQUENCE attribute"_err_en_US);
}
CheckCommonBlockDerivedType(name, typeSymbol);
}
}
}
commonBlockObjects_ = {};
}
Symbol &DeclarationVisitor::MakeCommonBlockSymbol(const parser::Name &name) {
return Resolve(name, currScope().MakeCommonBlock(name.source));
}
Symbol &DeclarationVisitor::MakeCommonBlockSymbol(
const std::optional<parser::Name> &name) {
if (name) {
return MakeCommonBlockSymbol(*name);
} else {
return MakeCommonBlockSymbol(parser::Name{});
}
}
bool DeclarationVisitor::NameIsKnownOrIntrinsic(const parser::Name &name) {
return FindSymbol(name) || HandleUnrestrictedSpecificIntrinsicFunction(name);
}
// Check if this derived type can be in a COMMON block.
void DeclarationVisitor::CheckCommonBlockDerivedType(
const SourceName &name, const Symbol &typeSymbol) {
if (const auto *scope{typeSymbol.scope()}) {
for (const auto &pair : *scope) {
const Symbol &component{*pair.second};
if (component.attrs().test(Attr::ALLOCATABLE)) {
Say2(name,
"Derived type variable '%s' may not appear in a COMMON block"
" due to ALLOCATABLE component"_err_en_US,
component.name(), "Component with ALLOCATABLE attribute"_en_US);
return;
}
if (const auto *details{component.detailsIf<ObjectEntityDetails>()}) {
if (details->init()) {
Say2(name,
"Derived type variable '%s' may not appear in a COMMON block"
" due to component with default initialization"_err_en_US,
component.name(), "Component with default initialization"_en_US);
return;
}
if (const auto *type{details->type()}) {
if (const auto *derived{type->AsDerived()}) {
CheckCommonBlockDerivedType(name, derived->typeSymbol());
}
}
}
}
}
}
bool DeclarationVisitor::HandleUnrestrictedSpecificIntrinsicFunction(
const parser::Name &name) {
if (auto interface{context().intrinsics().IsSpecificIntrinsicFunction(
name.source.ToString())}) {
// Unrestricted specific intrinsic function names (e.g., "cos")
// are acceptable as procedure interfaces.
Symbol &symbol{
MakeSymbol(InclusiveScope(), name.source, Attrs{Attr::INTRINSIC})};
if (interface->IsElemental()) {
symbol.attrs().set(Attr::ELEMENTAL);
}
symbol.set_details(ProcEntityDetails{});
Resolve(name, symbol);
return true;
} else {
return false;
}
}
// Checks for all locality-specs: LOCAL, LOCAL_INIT, and SHARED
bool DeclarationVisitor::PassesSharedLocalityChecks(
const parser::Name &name, Symbol &symbol) {
if (!IsVariableName(symbol)) {
SayLocalMustBeVariable(name, symbol); // C1124
return false;
}
if (symbol.owner() == currScope()) { // C1125 and C1126
SayAlreadyDeclared(name, symbol);
return false;
}
return true;
}
// Checks for locality-specs LOCAL and LOCAL_INIT
bool DeclarationVisitor::PassesLocalityChecks(
const parser::Name &name, Symbol &symbol) {
if (IsAllocatable(symbol)) { // C1128
SayWithDecl(name, symbol,
"ALLOCATABLE variable '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (IsOptional(symbol)) { // C1128
SayWithDecl(name, symbol,
"OPTIONAL argument '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (IsIntentIn(symbol)) { // C1128
SayWithDecl(name, symbol,
"INTENT IN argument '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (IsFinalizable(symbol)) { // C1128
SayWithDecl(name, symbol,
"Finalizable variable '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (IsCoarray(symbol)) { // C1128
SayWithDecl(
name, symbol, "Coarray '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (const DeclTypeSpec * type{symbol.GetType()}) {
if (type->IsPolymorphic() && IsDummy(symbol) &&
!IsPointer(symbol)) { // C1128
SayWithDecl(name, symbol,
"Nonpointer polymorphic argument '%s' not allowed in a "
"locality-spec"_err_en_US);
return false;
}
}
if (IsAssumedSizeArray(symbol)) { // C1128
SayWithDecl(name, symbol,
"Assumed size array '%s' not allowed in a locality-spec"_err_en_US);
return false;
}
if (std::optional<MessageFixedText> msg{
WhyNotModifiable(symbol, currScope())}) {
SayWithReason(name, symbol,
"'%s' may not appear in a locality-spec because it is not "
"definable"_err_en_US,
std::move(*msg));
return false;
}
return PassesSharedLocalityChecks(name, symbol);
}
Symbol &DeclarationVisitor::FindOrDeclareEnclosingEntity(
const parser::Name &name) {
Symbol *prev{FindSymbol(name)};
if (!prev) {
// Declare the name as an object in the enclosing scope so that
// the name can't be repurposed there later as something else.
prev = &MakeSymbol(InclusiveScope(), name.source, Attrs{});
ConvertToObjectEntity(*prev);
ApplyImplicitRules(*prev);
}
return *prev;
}
Symbol *DeclarationVisitor::DeclareLocalEntity(const parser::Name &name) {
Symbol &prev{FindOrDeclareEnclosingEntity(name)};
if (!PassesLocalityChecks(name, prev)) {
return nullptr;
}
return &MakeHostAssocSymbol(name, prev);
}
Symbol *DeclarationVisitor::DeclareStatementEntity(const parser::Name &name,
const std::optional<parser::IntegerTypeSpec> &type) {
const DeclTypeSpec *declTypeSpec{nullptr};
if (auto *prev{FindSymbol(name)}) {
if (prev->owner() == currScope()) {
SayAlreadyDeclared(name, *prev);
return nullptr;
}
name.symbol = nullptr;
declTypeSpec = prev->GetType();
}
Symbol &symbol{DeclareEntity<ObjectEntityDetails>(name, {})};
if (!symbol.has<ObjectEntityDetails>()) {
return nullptr; // error was reported in DeclareEntity
}
if (type) {
declTypeSpec = ProcessTypeSpec(*type);
}
if (declTypeSpec) {
// Subtlety: Don't let a "*length" specifier (if any is pending) affect the
// declaration of this implied DO loop control variable.
auto restorer{
common::ScopedSet(charInfo_.length, std::optional<ParamValue>{})};
SetType(name, *declTypeSpec);
} else {
ApplyImplicitRules(symbol);
}
return Resolve(name, &symbol);
}
// Set the type of an entity or report an error.
void DeclarationVisitor::SetType(
const parser::Name &name, const DeclTypeSpec &type) {
CHECK(name.symbol);
auto &symbol{*name.symbol};
if (charInfo_.length) { // Declaration has "*length" (R723)
auto length{std::move(*charInfo_.length)};
charInfo_.length.reset();
if (type.category() == DeclTypeSpec::Character) {
auto kind{type.characterTypeSpec().kind()};
// Recurse with correct type.
SetType(name,
currScope().MakeCharacterType(std::move(length), std::move(kind)));
return;
} else { // C753
Say(name,
"A length specifier cannot be used to declare the non-character entity '%s'"_err_en_US);
}
}
auto *prevType{symbol.GetType()};
if (!prevType) {
symbol.SetType(type);
} else if (symbol.has<UseDetails>()) {
// error recovery case, redeclaration of use-associated name
} else if (HadForwardRef(symbol)) {
// error recovery after use of host-associated name
} else if (!symbol.test(Symbol::Flag::Implicit)) {
SayWithDecl(
name, symbol, "The type of '%s' has already been declared"_err_en_US);
context().SetError(symbol);
} else if (type != *prevType) {
SayWithDecl(name, symbol,
"The type of '%s' has already been implicitly declared"_err_en_US);
context().SetError(symbol);
} else {
symbol.set(Symbol::Flag::Implicit, false);
}
}
std::optional<DerivedTypeSpec> DeclarationVisitor::ResolveDerivedType(
const parser::Name &name) {
Symbol *symbol{FindSymbol(NonDerivedTypeScope(), name)};
if (!symbol || symbol->has<UnknownDetails>()) {
if (allowForwardReferenceToDerivedType()) {
if (!symbol) {
symbol = &MakeSymbol(InclusiveScope(), name.source, Attrs{});
Resolve(name, *symbol);
};
DerivedTypeDetails details;
details.set_isForwardReferenced();
symbol->set_details(std::move(details));
} else { // C732
Say(name, "Derived type '%s' not found"_err_en_US);
return std::nullopt;
}
}
if (CheckUseError(name)) {
return std::nullopt;
}
symbol = &symbol->GetUltimate();
if (auto *details{symbol->detailsIf<GenericDetails>()}) {
if (details->derivedType()) {
symbol = details->derivedType();
}
}
if (symbol->has<DerivedTypeDetails>()) {
return DerivedTypeSpec{name.source, *symbol};
} else {
Say(name, "'%s' is not a derived type"_err_en_US);
return std::nullopt;
}
}
std::optional<DerivedTypeSpec> DeclarationVisitor::ResolveExtendsType(
const parser::Name &typeName, const parser::Name *extendsName) {
if (!extendsName) {
return std::nullopt;
} else if (typeName.source == extendsName->source) {
Say(extendsName->source,
"Derived type '%s' cannot extend itself"_err_en_US);
return std::nullopt;
} else {
return ResolveDerivedType(*extendsName);
}
}
Symbol *DeclarationVisitor::NoteInterfaceName(const parser::Name &name) {
// The symbol is checked later by CheckExplicitInterface() and
// CheckBindings(). It can be a forward reference.
if (!NameIsKnownOrIntrinsic(name)) {
Symbol &symbol{MakeSymbol(InclusiveScope(), name.source, Attrs{})};
Resolve(name, symbol);
}
return name.symbol;
}
void DeclarationVisitor::CheckExplicitInterface(const parser::Name &name) {
if (const Symbol * symbol{name.symbol}) {
if (!symbol->HasExplicitInterface()) {
Say(name,
"'%s' must be an abstract interface or a procedure with "
"an explicit interface"_err_en_US,
symbol->name());
}
}
}
// Create a symbol for a type parameter, component, or procedure binding in
// the current derived type scope. Return false on error.
Symbol *DeclarationVisitor::MakeTypeSymbol(
const parser::Name &name, Details &&details) {
return Resolve(name, MakeTypeSymbol(name.source, std::move(details)));
}
Symbol *DeclarationVisitor::MakeTypeSymbol(
const SourceName &name, Details &&details) {
Scope &derivedType{currScope()};
CHECK(derivedType.IsDerivedType());
if (auto *symbol{FindInScope(derivedType, name)}) { // C742
Say2(name,
"Type parameter, component, or procedure binding '%s'"
" already defined in this type"_err_en_US,
*symbol, "Previous definition of '%s'"_en_US);
return nullptr;
} else {
auto attrs{GetAttrs()};
// Apply binding-private-stmt if present and this is a procedure binding
if (derivedTypeInfo_.privateBindings &&
!attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE}) &&
std::holds_alternative<ProcBindingDetails>(details)) {
attrs.set(Attr::PRIVATE);
}
Symbol &result{MakeSymbol(name, attrs, std::move(details))};
if (result.has<TypeParamDetails>()) {
derivedType.symbol()->get<DerivedTypeDetails>().add_paramDecl(result);
}
return &result;
}
}
// Return true if it is ok to declare this component in the current scope.
// Otherwise, emit an error and return false.
bool DeclarationVisitor::OkToAddComponent(
const parser::Name &name, const Symbol *extends) {
for (const Scope *scope{&currScope()}; scope;) {
CHECK(scope->IsDerivedType());
if (auto *prev{FindInScope(*scope, name)}) {
if (!context().HasError(*prev)) {
auto msg{""_en_US};
if (extends) {
msg = "Type cannot be extended as it has a component named"
" '%s'"_err_en_US;
} else if (prev->test(Symbol::Flag::ParentComp)) {
msg = "'%s' is a parent type of this type and so cannot be"
" a component"_err_en_US;
} else if (scope != &currScope()) {
msg = "Component '%s' is already declared in a parent of this"
" derived type"_err_en_US;
} else {
msg = "Component '%s' is already declared in this"
" derived type"_err_en_US;
}
Say2(name, std::move(msg), *prev, "Previous declaration of '%s'"_en_US);
}
return false;
}
if (scope == &currScope() && extends) {
// The parent component has not yet been added to the scope.
scope = extends->scope();
} else {
scope = scope->GetDerivedTypeParent();
}
}
return true;
}
ParamValue DeclarationVisitor::GetParamValue(
const parser::TypeParamValue &x, common::TypeParamAttr attr) {
return std::visit(
common::visitors{
[=](const parser::ScalarIntExpr &x) { // C704
return ParamValue{EvaluateIntExpr(x), attr};
},
[=](const parser::Star &) { return ParamValue::Assumed(attr); },
[=](const parser::TypeParamValue::Deferred &) {
return ParamValue::Deferred(attr);
},
},
x.u);
}
// ConstructVisitor implementation
void ConstructVisitor::ResolveIndexName(
const parser::ConcurrentControl &control) {
const parser::Name &name{std::get<parser::Name>(control.t)};
auto *prev{FindSymbol(name)};
if (prev) {
if (prev->owner().kind() == Scope::Kind::Forall ||
prev->owner() == currScope()) {
SayAlreadyDeclared(name, *prev);
return;
}
name.symbol = nullptr;
}
auto &symbol{DeclareObjectEntity(name)};
if (symbol.GetType()) {
// type came from explicit type-spec
} else if (!prev) {
ApplyImplicitRules(symbol);
} else if (!prev->has<ObjectEntityDetails>() && !prev->has<EntityDetails>()) {
Say2(name, "Index name '%s' conflicts with existing identifier"_err_en_US,
*prev, "Previous declaration of '%s'"_en_US);
return;
} else {
if (const auto *type{prev->GetType()}) {
symbol.SetType(*type);
}
if (prev->IsObjectArray()) {
SayWithDecl(name, *prev, "Index variable '%s' is not scalar"_err_en_US);
return;
}
}
EvaluateExpr(parser::Scalar{parser::Integer{common::Clone(name)}});
}
// We need to make sure that all of the index-names get declared before the
// expressions in the loop control are evaluated so that references to the
// index-names in the expressions are correctly detected.
bool ConstructVisitor::Pre(const parser::ConcurrentHeader &header) {
BeginDeclTypeSpec();
Walk(std::get<std::optional<parser::IntegerTypeSpec>>(header.t));
const auto &controls{
std::get<std::list<parser::ConcurrentControl>>(header.t)};
for (const auto &control : controls) {
ResolveIndexName(control);
}
Walk(controls);
Walk(std::get<std::optional<parser::ScalarLogicalExpr>>(header.t));
EndDeclTypeSpec();
return false;
}
bool ConstructVisitor::Pre(const parser::LocalitySpec::Local &x) {
for (auto &name : x.v) {
if (auto *symbol{DeclareLocalEntity(name)}) {
symbol->set(Symbol::Flag::LocalityLocal);
}
}
return false;
}
bool ConstructVisitor::Pre(const parser::LocalitySpec::LocalInit &x) {
for (auto &name : x.v) {
if (auto *symbol{DeclareLocalEntity(name)}) {
symbol->set(Symbol::Flag::LocalityLocalInit);
}
}
return false;
}
bool ConstructVisitor::Pre(const parser::LocalitySpec::Shared &x) {
for (const auto &name : x.v) {
if (!FindSymbol(name)) {
Say(name, "Variable '%s' with SHARED locality implicitly declared"_en_US);
}
Symbol &prev{FindOrDeclareEnclosingEntity(name)};
if (PassesSharedLocalityChecks(name, prev)) {
MakeHostAssocSymbol(name, prev).set(Symbol::Flag::LocalityShared);
}
}
return false;
}
bool ConstructVisitor::Pre(const parser::AcSpec &x) {
ProcessTypeSpec(x.type);
PushScope(Scope::Kind::ImpliedDos, nullptr);
Walk(x.values);
PopScope();
return false;
}
// Section 19.4, paragraph 5 says that each ac-do-variable has the scope of the
// enclosing ac-implied-do
bool ConstructVisitor::Pre(const parser::AcImpliedDo &x) {
auto &values{std::get<std::list<parser::AcValue>>(x.t)};
auto &control{std::get<parser::AcImpliedDoControl>(x.t)};
auto &type{std::get<std::optional<parser::IntegerTypeSpec>>(control.t)};
auto &bounds{std::get<parser::AcImpliedDoControl::Bounds>(control.t)};
PushScope(Scope::Kind::ImpliedDos, nullptr);
DeclareStatementEntity(bounds.name.thing.thing, type);
Walk(bounds);
Walk(values);
PopScope();
return false;
}
bool ConstructVisitor::Pre(const parser::DataImpliedDo &x) {
auto &objects{std::get<std::list<parser::DataIDoObject>>(x.t)};
auto &type{std::get<std::optional<parser::IntegerTypeSpec>>(x.t)};
auto &bounds{std::get<parser::DataImpliedDo::Bounds>(x.t)};
DeclareStatementEntity(bounds.name.thing.thing, type);
Walk(bounds);
Walk(objects);
return false;
}
// Sets InDataStmt flag on a variable (or misidentified function) in a DATA
// statement so that the predicate IsInitialized(base symbol) will be true
// during semantic analysis before the symbol's initializer is constructed.
bool ConstructVisitor::Pre(const parser::DataIDoObject &x) {
std::visit(
common::visitors{
[&](const parser::Scalar<Indirection<parser::Designator>> &y) {
Walk(y.thing.value());
const parser::Name &first{parser::GetFirstName(y.thing.value())};
if (first.symbol) {
first.symbol->set(Symbol::Flag::InDataStmt);
}
},
[&](const Indirection<parser::DataImpliedDo> &y) { Walk(y.value()); },
},
x.u);
return false;
}
bool ConstructVisitor::Pre(const parser::DataStmtObject &x) {
std::visit(common::visitors{
[&](const Indirection<parser::Variable> &y) {
Walk(y.value());
const parser::Name &first{parser::GetFirstName(y.value())};
if (first.symbol) {
first.symbol->set(Symbol::Flag::InDataStmt);
}
},
[&](const parser::DataImpliedDo &y) {
PushScope(Scope::Kind::ImpliedDos, nullptr);
Walk(y);
PopScope();
},
},
x.u);
return false;
}
bool ConstructVisitor::Pre(const parser::DataStmtValue &x) {
const auto &data{std::get<parser::DataStmtConstant>(x.t)};
auto &mutableData{const_cast<parser::DataStmtConstant &>(data)};
if (auto *elem{parser::Unwrap<parser::ArrayElement>(mutableData)}) {
if (const auto *name{std::get_if<parser::Name>(&elem->base.u)}) {
if (const Symbol * symbol{FindSymbol(*name)}) {
if (const Symbol * ultimate{GetAssociationRoot(*symbol)}) {
if (ultimate->has<DerivedTypeDetails>()) {
mutableData.u = elem->ConvertToStructureConstructor(
DerivedTypeSpec{name->source, *ultimate});
}
}
}
}
}
return true;
}
bool ConstructVisitor::Pre(const parser::DoConstruct &x) {
if (x.IsDoConcurrent()) {
PushScope(Scope::Kind::Block, nullptr);
}
return true;
}
void ConstructVisitor::Post(const parser::DoConstruct &x) {
if (x.IsDoConcurrent()) {
PopScope();
}
}
bool ConstructVisitor::Pre(const parser::ForallConstruct &) {
PushScope(Scope::Kind::Forall, nullptr);
return true;
}
void ConstructVisitor::Post(const parser::ForallConstruct &) { PopScope(); }
bool ConstructVisitor::Pre(const parser::ForallStmt &) {
PushScope(Scope::Kind::Forall, nullptr);
return true;
}
void ConstructVisitor::Post(const parser::ForallStmt &) { PopScope(); }
bool ConstructVisitor::Pre(const parser::BlockStmt &x) {
CheckDef(x.v);
PushScope(Scope::Kind::Block, nullptr);
return false;
}
bool ConstructVisitor::Pre(const parser::EndBlockStmt &x) {
PopScope();
CheckRef(x.v);
return false;
}
void ConstructVisitor::Post(const parser::Selector &x) {
GetCurrentAssociation().selector = ResolveSelector(x);
}
bool ConstructVisitor::Pre(const parser::AssociateStmt &x) {
CheckDef(x.t);
PushScope(Scope::Kind::Block, nullptr);
PushAssociation();
return true;
}
void ConstructVisitor::Post(const parser::EndAssociateStmt &x) {
PopAssociation();
PopScope();
CheckRef(x.v);
}
void ConstructVisitor::Post(const parser::Association &x) {
const auto &name{std::get<parser::Name>(x.t)};
GetCurrentAssociation().name = &name;
if (auto *symbol{MakeAssocEntity()}) {
if (ExtractCoarrayRef(GetCurrentAssociation().selector.expr)) { // C1103
Say("Selector must not be a coindexed object"_err_en_US);
}
SetTypeFromAssociation(*symbol);
SetAttrsFromAssociation(*symbol);
}
GetCurrentAssociation() = {}; // clean for further parser::Association.
}
bool ConstructVisitor::Pre(const parser::ChangeTeamStmt &x) {
CheckDef(x.t);
PushScope(Scope::Kind::Block, nullptr);
PushAssociation();
return true;
}
void ConstructVisitor::Post(const parser::CoarrayAssociation &x) {
const auto &decl{std::get<parser::CodimensionDecl>(x.t)};
const auto &name{std::get<parser::Name>(decl.t)};
if (auto *symbol{FindInScope(currScope(), name)}) {
const auto &selector{std::get<parser::Selector>(x.t)};
if (auto sel{ResolveSelector(selector)}) {
const Symbol *whole{UnwrapWholeSymbolDataRef(sel.expr)};
if (!whole || whole->Corank() == 0) {
Say(sel.source, // C1116
"Selector in coarray association must name a coarray"_err_en_US);
} else if (auto dynType{sel.expr->GetType()}) {
if (!symbol->GetType()) {
symbol->SetType(ToDeclTypeSpec(std::move(*dynType)));
}
}
}
}
}
void ConstructVisitor::Post(const parser::EndChangeTeamStmt &x) {
PopAssociation();
PopScope();
CheckRef(x.t);
}
bool ConstructVisitor::Pre(const parser::SelectTypeConstruct &) {
PushAssociation();
return true;
}
void ConstructVisitor::Post(const parser::SelectTypeConstruct &) {
PopAssociation();
}
void ConstructVisitor::Post(const parser::SelectTypeStmt &x) {
auto &association{GetCurrentAssociation()};
if (const std::optional<parser::Name> &name{std::get<1>(x.t)}) {
// This isn't a name in the current scope, it is in each TypeGuardStmt
MakePlaceholder(*name, MiscDetails::Kind::SelectTypeAssociateName);
association.name = &*name;
auto exprType{association.selector.expr->GetType()};
if (ExtractCoarrayRef(association.selector.expr)) { // C1103
Say("Selector must not be a coindexed object"_err_en_US);
}
if (exprType && !exprType->IsPolymorphic()) { // C1159
Say(association.selector.source,
"Selector '%s' in SELECT TYPE statement must be "
"polymorphic"_err_en_US);
}
} else {
if (const Symbol *
whole{UnwrapWholeSymbolDataRef(association.selector.expr)}) {
ConvertToObjectEntity(const_cast<Symbol &>(*whole));
if (!IsVariableName(*whole)) {
Say(association.selector.source, // C901
"Selector is not a variable"_err_en_US);
association = {};
}
if (const DeclTypeSpec * type{whole->GetType()}) {
if (!type->IsPolymorphic()) { // C1159
Say(association.selector.source,
"Selector '%s' in SELECT TYPE statement must be "
"polymorphic"_err_en_US);
}
}
} else {
Say(association.selector.source, // C1157
"Selector is not a named variable: 'associate-name =>' is required"_err_en_US);
association = {};
}
}
}
void ConstructVisitor::Post(const parser::SelectRankStmt &x) {
auto &association{GetCurrentAssociation()};
if (const std::optional<parser::Name> &name{std::get<1>(x.t)}) {
// This isn't a name in the current scope, it is in each SelectRankCaseStmt
MakePlaceholder(*name, MiscDetails::Kind::SelectRankAssociateName);
association.name = &*name;
}
}
bool ConstructVisitor::Pre(const parser::SelectTypeConstruct::TypeCase &) {
PushScope(Scope::Kind::Block, nullptr);
return true;
}
void ConstructVisitor::Post(const parser::SelectTypeConstruct::TypeCase &) {
PopScope();
}
bool ConstructVisitor::Pre(const parser::SelectRankConstruct::RankCase &) {
PushScope(Scope::Kind::Block, nullptr);
return true;
}
void ConstructVisitor::Post(const parser::SelectRankConstruct::RankCase &) {
PopScope();
}
void ConstructVisitor::Post(const parser::TypeGuardStmt::Guard &x) {
if (auto *symbol{MakeAssocEntity()}) {
if (std::holds_alternative<parser::Default>(x.u)) {
SetTypeFromAssociation(*symbol);
} else if (const auto *type{GetDeclTypeSpec()}) {
symbol->SetType(*type);
}
SetAttrsFromAssociation(*symbol);
}
}
void ConstructVisitor::Post(const parser::SelectRankCaseStmt::Rank &x) {
if (auto *symbol{MakeAssocEntity()}) {
SetTypeFromAssociation(*symbol);
SetAttrsFromAssociation(*symbol);
if (const auto *init{std::get_if<parser::ScalarIntConstantExpr>(&x.u)}) {
if (auto val{EvaluateInt64(context(), *init)}) {
auto &details{symbol->get<AssocEntityDetails>()};
details.set_rank(*val);
}
}
}
}
bool ConstructVisitor::Pre(const parser::SelectRankConstruct &) {
PushAssociation();
return true;
}
void ConstructVisitor::Post(const parser::SelectRankConstruct &) {
PopAssociation();
}
bool ConstructVisitor::CheckDef(const std::optional<parser::Name> &x) {
if (x) {
MakeSymbol(*x, MiscDetails{MiscDetails::Kind::ConstructName});
}
return true;
}
void ConstructVisitor::CheckRef(const std::optional<parser::Name> &x) {
if (x) {
// Just add an occurrence of this name; checking is done in ValidateLabels
FindSymbol(*x);
}
}
// Make a symbol representing an associating entity from current association.
Symbol *ConstructVisitor::MakeAssocEntity() {
Symbol *symbol{nullptr};
auto &association{GetCurrentAssociation()};
if (association.name) {
symbol = &MakeSymbol(*association.name, UnknownDetails{});
if (symbol->has<AssocEntityDetails>() && symbol->owner() == currScope()) {
Say(*association.name, // C1104
"The associate name '%s' is already used in this associate statement"_err_en_US);
return nullptr;
}
} else if (const Symbol *
whole{UnwrapWholeSymbolDataRef(association.selector.expr)}) {
symbol = &MakeSymbol(whole->name());
} else {
return nullptr;
}
if (auto &expr{association.selector.expr}) {
symbol->set_details(AssocEntityDetails{common::Clone(*expr)});
} else {
symbol->set_details(AssocEntityDetails{});
}
return symbol;
}
// Set the type of symbol based on the current association selector.
void ConstructVisitor::SetTypeFromAssociation(Symbol &symbol) {
auto &details{symbol.get<AssocEntityDetails>()};
const MaybeExpr *pexpr{&details.expr()};
if (!*pexpr) {
pexpr = &GetCurrentAssociation().selector.expr;
}
if (*pexpr) {
const SomeExpr &expr{**pexpr};
if (std::optional<evaluate::DynamicType> type{expr.GetType()}) {
if (const auto *charExpr{
evaluate::UnwrapExpr<evaluate::Expr<evaluate::SomeCharacter>>(
expr)}) {
symbol.SetType(ToDeclTypeSpec(std::move(*type),
FoldExpr(
std::visit([](const auto &kindChar) { return kindChar.LEN(); },
charExpr->u))));
} else {
symbol.SetType(ToDeclTypeSpec(std::move(*type)));
}
} else {
// BOZ literals, procedure designators, &c. are not acceptable
Say(symbol.name(), "Associate name '%s' must have a type"_err_en_US);
}
}
}
// If current selector is a variable, set some of its attributes on symbol.
void ConstructVisitor::SetAttrsFromAssociation(Symbol &symbol) {
Attrs attrs{evaluate::GetAttrs(GetCurrentAssociation().selector.expr)};
symbol.attrs() |= attrs &
Attrs{Attr::TARGET, Attr::ASYNCHRONOUS, Attr::VOLATILE, Attr::CONTIGUOUS};
if (attrs.test(Attr::POINTER)) {
symbol.attrs().set(Attr::TARGET);
}
}
ConstructVisitor::Selector ConstructVisitor::ResolveSelector(
const parser::Selector &x) {
return std::visit(common::visitors{
[&](const parser::Expr &expr) {
return Selector{expr.source, EvaluateExpr(expr)};
},
[&](const parser::Variable &var) {
return Selector{var.GetSource(), EvaluateExpr(var)};
},
},
x.u);
}
ConstructVisitor::Association &ConstructVisitor::GetCurrentAssociation() {
CHECK(!associationStack_.empty());
return associationStack_.back();
}
void ConstructVisitor::PushAssociation() {
associationStack_.emplace_back(Association{});
}
void ConstructVisitor::PopAssociation() {
CHECK(!associationStack_.empty());
associationStack_.pop_back();
}
const DeclTypeSpec &ConstructVisitor::ToDeclTypeSpec(
evaluate::DynamicType &&type) {
switch (type.category()) {
SWITCH_COVERS_ALL_CASES
case common::TypeCategory::Integer:
case common::TypeCategory::Real:
case common::TypeCategory::Complex:
return context().MakeNumericType(type.category(), type.kind());
case common::TypeCategory::Logical:
return context().MakeLogicalType(type.kind());
case common::TypeCategory::Derived:
if (type.IsAssumedType()) {
return currScope().MakeTypeStarType();
} else if (type.IsUnlimitedPolymorphic()) {
return currScope().MakeClassStarType();
} else {
return currScope().MakeDerivedType(
type.IsPolymorphic() ? DeclTypeSpec::ClassDerived
: DeclTypeSpec::TypeDerived,
common::Clone(type.GetDerivedTypeSpec())
);
}
case common::TypeCategory::Character:
CRASH_NO_CASE;
}
}
const DeclTypeSpec &ConstructVisitor::ToDeclTypeSpec(
evaluate::DynamicType &&type, MaybeSubscriptIntExpr &&length) {
CHECK(type.category() == common::TypeCategory::Character);
if (length) {
return currScope().MakeCharacterType(
ParamValue{SomeIntExpr{*std::move(length)}, common::TypeParamAttr::Len},
KindExpr{type.kind()});
} else {
return currScope().MakeCharacterType(
ParamValue::Deferred(common::TypeParamAttr::Len),
KindExpr{type.kind()});
}
}
// ResolveNamesVisitor implementation
bool ResolveNamesVisitor::Pre(const parser::FunctionReference &x) {
HandleCall(Symbol::Flag::Function, x.v);
return false;
}
bool ResolveNamesVisitor::Pre(const parser::CallStmt &x) {
HandleCall(Symbol::Flag::Subroutine, x.v);
return false;
}
bool ResolveNamesVisitor::Pre(const parser::ImportStmt &x) {
auto &scope{currScope()};
// Check C896 and C899: where IMPORT statements are allowed
switch (scope.kind()) {
case Scope::Kind::Module:
if (scope.IsModule()) {
Say("IMPORT is not allowed in a module scoping unit"_err_en_US);
return false;
} else if (x.kind == common::ImportKind::None) {
Say("IMPORT,NONE is not allowed in a submodule scoping unit"_err_en_US);
return false;
}
break;
case Scope::Kind::MainProgram:
Say("IMPORT is not allowed in a main program scoping unit"_err_en_US);
return false;
case Scope::Kind::Subprogram:
if (scope.parent().IsGlobal()) {
Say("IMPORT is not allowed in an external subprogram scoping unit"_err_en_US);
return false;
}
break;
case Scope::Kind::BlockData: // C1415 (in part)
Say("IMPORT is not allowed in a BLOCK DATA subprogram"_err_en_US);
return false;
default:;
}
if (auto error{scope.SetImportKind(x.kind)}) {
Say(std::move(*error));
}
for (auto &name : x.names) {
if (FindSymbol(scope.parent(), name)) {
scope.add_importName(name.source);
} else {
Say(name, "'%s' not found in host scope"_err_en_US);
}
}
prevImportStmt_ = currStmtSource();
return false;
}
const parser::Name *DeclarationVisitor::ResolveStructureComponent(
const parser::StructureComponent &x) {
return FindComponent(ResolveDataRef(x.base), x.component);
}
const parser::Name *DeclarationVisitor::ResolveDesignator(
const parser::Designator &x) {
return std::visit(
common::visitors{
[&](const parser::DataRef &x) { return ResolveDataRef(x); },
[&](const parser::Substring &x) {
return ResolveDataRef(std::get<parser::DataRef>(x.t));
},
},
x.u);
}
const parser::Name *DeclarationVisitor::ResolveDataRef(
const parser::DataRef &x) {
return std::visit(
common::visitors{
[=](const parser::Name &y) { return ResolveName(y); },
[=](const Indirection<parser::StructureComponent> &y) {
return ResolveStructureComponent(y.value());
},
[&](const Indirection<parser::ArrayElement> &y) {
Walk(y.value().subscripts);
const parser::Name *name{ResolveDataRef(y.value().base)};
if (!name) {
} else if (!name->symbol->has<ProcEntityDetails>()) {
ConvertToObjectEntity(*name->symbol);
} else if (!context().HasError(*name->symbol)) {
SayWithDecl(*name, *name->symbol,
"Cannot reference function '%s' as data"_err_en_US);
}
return name;
},
[&](const Indirection<parser::CoindexedNamedObject> &y) {
Walk(y.value().imageSelector);
return ResolveDataRef(y.value().base);
},
},
x.u);
}
// If implicit types are allowed, ensure name is in the symbol table.
// Otherwise, report an error if it hasn't been declared.
const parser::Name *DeclarationVisitor::ResolveName(const parser::Name &name) {
FindSymbol(name);
if (CheckForHostAssociatedImplicit(name)) {
NotePossibleBadForwardRef(name);
return &name;
}
if (Symbol * symbol{name.symbol}) {
if (CheckUseError(name)) {
return nullptr; // reported an error
}
NotePossibleBadForwardRef(name);
symbol->set(Symbol::Flag::ImplicitOrError, false);
if (IsUplevelReference(*symbol)) {
MakeHostAssocSymbol(name, *symbol);
} else if (IsDummy(*symbol) ||
(!symbol->GetType() && FindCommonBlockContaining(*symbol))) {
ConvertToObjectEntity(*symbol);
ApplyImplicitRules(*symbol);
}
return &name;
}
if (isImplicitNoneType()) {
Say(name, "No explicit type declared for '%s'"_err_en_US);
return nullptr;
}
// Create the symbol then ensure it is accessible
MakeSymbol(InclusiveScope(), name.source, Attrs{});
auto *symbol{FindSymbol(name)};
if (!symbol) {
Say(name,
"'%s' from host scoping unit is not accessible due to IMPORT"_err_en_US);
return nullptr;
}
ConvertToObjectEntity(*symbol);
ApplyImplicitRules(*symbol);
NotePossibleBadForwardRef(name);
return &name;
}
// A specification expression may refer to a symbol in the host procedure that
// is implicitly typed. Because specification parts are processed before
// execution parts, this may be the first time we see the symbol. It can't be a
// local in the current scope (because it's in a specification expression) so
// either it is implicitly declared in the host procedure or it is an error.
// We create a symbol in the host assuming it is the former; if that proves to
// be wrong we report an error later in CheckDeclarations().
bool DeclarationVisitor::CheckForHostAssociatedImplicit(
const parser::Name &name) {
if (inExecutionPart_) {
return false;
}
if (name.symbol) {
ApplyImplicitRules(*name.symbol);
}
Symbol *hostSymbol;
Scope *host{GetHostProcedure()};
if (!host || isImplicitNoneType(*host)) {
return false;
}
if (!name.symbol) {
hostSymbol = &MakeSymbol(*host, name.source, Attrs{});
ConvertToObjectEntity(*hostSymbol);
ApplyImplicitRules(*hostSymbol);
hostSymbol->set(Symbol::Flag::ImplicitOrError);
} else if (name.symbol->test(Symbol::Flag::ImplicitOrError)) {
hostSymbol = name.symbol;
} else {
return false;
}
Symbol &symbol{MakeHostAssocSymbol(name, *hostSymbol)};
if (isImplicitNoneType()) {
symbol.get<HostAssocDetails>().implicitOrExplicitTypeError = true;
} else {
symbol.get<HostAssocDetails>().implicitOrSpecExprError = true;
}
return true;
}
bool DeclarationVisitor::IsUplevelReference(const Symbol &symbol) {
const Scope &symbolUnit{GetProgramUnitContaining(symbol)};
if (symbolUnit == GetProgramUnitContaining(currScope())) {
return false;
} else {
Scope::Kind kind{symbolUnit.kind()};
return kind == Scope::Kind::Subprogram || kind == Scope::Kind::MainProgram;
}
}
// base is a part-ref of a derived type; find the named component in its type.
// Also handles intrinsic type parameter inquiries (%kind, %len) and
// COMPLEX component references (%re, %im).
const parser::Name *DeclarationVisitor::FindComponent(
const parser::Name *base, const parser::Name &component) {
if (!base || !base->symbol) {
return nullptr;
}
auto &symbol{base->symbol->GetUltimate()};
if (!symbol.has<AssocEntityDetails>() && !ConvertToObjectEntity(symbol)) {
SayWithDecl(*base, symbol,
"'%s' is an invalid base for a component reference"_err_en_US);
return nullptr;
}
auto *type{symbol.GetType()};
if (!type) {
return nullptr; // should have already reported error
}
if (const IntrinsicTypeSpec * intrinsic{type->AsIntrinsic()}) {
auto name{component.ToString()};
auto category{intrinsic->category()};
MiscDetails::Kind miscKind{MiscDetails::Kind::None};
if (name == "kind") {
miscKind = MiscDetails::Kind::KindParamInquiry;
} else if (category == TypeCategory::Character) {
if (name == "len") {
miscKind = MiscDetails::Kind::LenParamInquiry;
}
} else if (category == TypeCategory::Complex) {
if (name == "re") {
miscKind = MiscDetails::Kind::ComplexPartRe;
} else if (name == "im") {
miscKind = MiscDetails::Kind::ComplexPartIm;
}
}
if (miscKind != MiscDetails::Kind::None) {
MakePlaceholder(component, miscKind);
return nullptr;
}
} else if (const DerivedTypeSpec * derived{type->AsDerived()}) {
if (const Scope * scope{derived->scope()}) {
if (Resolve(component, scope->FindComponent(component.source))) {
if (auto msg{
CheckAccessibleComponent(currScope(), *component.symbol)}) {
context().Say(component.source, *msg);
}
return &component;
} else {
SayDerivedType(component.source,
"Component '%s' not found in derived type '%s'"_err_en_US, *scope);
}
}
return nullptr;
}
if (symbol.test(Symbol::Flag::Implicit)) {
Say(*base,
"'%s' is not an object of derived type; it is implicitly typed"_err_en_US);
} else {
SayWithDecl(
*base, symbol, "'%s' is not an object of derived type"_err_en_US);
}
return nullptr;
}
void DeclarationVisitor::Initialization(const parser::Name &name,
const parser::Initialization &init, bool inComponentDecl) {
// Traversal of the initializer was deferred to here so that the
// symbol being declared can be available for use in the expression, e.g.:
// real, parameter :: x = tiny(x)
if (!name.symbol) {
return;
}
Symbol &ultimate{name.symbol->GetUltimate()};
if (IsAllocatable(ultimate)) {
Say(name, "Allocatable object '%s' cannot be initialized"_err_en_US);
return;
}
if (auto *object{ultimate.detailsIf<ObjectEntityDetails>()}) {
// TODO: check C762 - all bounds and type parameters of component
// are colons or constant expressions if component is initialized
std::visit(
common::visitors{
[&](const parser::ConstantExpr &expr) {
NonPointerInitialization(name, expr);
},
[&](const parser::NullInit &null) {
Walk(null);
if (auto nullInit{EvaluateExpr(null)}) {
if (!evaluate::IsNullPointer(*nullInit)) {
Say(name,
"Pointer initializer must be intrinsic NULL()"_err_en_US); // C813
} else if (IsPointer(ultimate)) {
object->set_init(std::move(*nullInit));
} else {
Say(name,
"Non-pointer component '%s' initialized with null pointer"_err_en_US);
}
}
},
[&](const parser::InitialDataTarget &) {
// Defer analysis to the end of the specification part
// so that forward references and attribute checks like SAVE
// work better.
},
[&](const std::list<Indirection<parser::DataStmtValue>> &) {
// TODO: Need to Walk(init.u); when implementing this case
if (inComponentDecl) {
Say(name,
"Component '%s' initialized with DATA statement values"_err_en_US);
} else {
// TODO - DATA statements and DATA-like initialization extension
}
},
},
init.u);
}
}
void DeclarationVisitor::PointerInitialization(
const parser::Name &name, const parser::InitialDataTarget &target) {
if (name.symbol) {
Symbol &ultimate{name.symbol->GetUltimate()};
if (!context().HasError(ultimate)) {
if (IsPointer(ultimate)) {
if (auto *details{ultimate.detailsIf<ObjectEntityDetails>()}) {
CHECK(!details->init());
Walk(target);
if (MaybeExpr expr{EvaluateExpr(target)}) {
// Validation is done in declaration checking.
details->set_init(std::move(*expr));
}
}
} else {
Say(name,
"'%s' is not a pointer but is initialized like one"_err_en_US);
context().SetError(ultimate);
}
}
}
}
void DeclarationVisitor::PointerInitialization(
const parser::Name &name, const parser::ProcPointerInit &target) {
if (name.symbol) {
Symbol &ultimate{name.symbol->GetUltimate()};
if (!context().HasError(ultimate)) {
if (IsProcedurePointer(ultimate)) {
auto &details{ultimate.get<ProcEntityDetails>()};
CHECK(!details.init());
Walk(target);
if (const auto *targetName{std::get_if<parser::Name>(&target.u)}) {
if (targetName->symbol) {
// Validation is done in declaration checking.
details.set_init(*targetName->symbol);
}
} else {
details.set_init(nullptr); // explicit NULL()
}
} else {
Say(name,
"'%s' is not a procedure pointer but is initialized "
"like one"_err_en_US);
context().SetError(ultimate);
}
}
}
}
void DeclarationVisitor::NonPointerInitialization(
const parser::Name &name, const parser::ConstantExpr &expr) {
if (name.symbol) {
Symbol &ultimate{name.symbol->GetUltimate()};
if (!context().HasError(ultimate)) {
if (IsPointer(ultimate)) {
Say(name,
"'%s' is a pointer but is not initialized like one"_err_en_US);
} else if (auto *details{ultimate.detailsIf<ObjectEntityDetails>()}) {
CHECK(!details->init());
Walk(expr);
if (ultimate.owner().IsParameterizedDerivedType()) {
// Can't convert to type of component, which might not yet
// be known; that's done later during PDT instantiation.
if (MaybeExpr value{EvaluateExpr(expr)}) {
details->set_init(std::move(*value));
}
} else if (MaybeExpr folded{EvaluateNonPointerInitializer(
ultimate, expr, expr.thing.value().source)}) {
details->set_init(std::move(*folded));
}
}
}
}
}
void ResolveNamesVisitor::HandleCall(
Symbol::Flag procFlag, const parser::Call &call) {
std::visit(
common::visitors{
[&](const parser::Name &x) { HandleProcedureName(procFlag, x); },
[&](const parser::ProcComponentRef &x) { Walk(x); },
},
std::get<parser::ProcedureDesignator>(call.t).u);
Walk(std::get<std::list<parser::ActualArgSpec>>(call.t));
}
void ResolveNamesVisitor::HandleProcedureName(
Symbol::Flag flag, const parser::Name &name) {
CHECK(flag == Symbol::Flag::Function || flag == Symbol::Flag::Subroutine);
auto *symbol{FindSymbol(NonDerivedTypeScope(), name)};
if (!symbol) {
if (IsIntrinsic(name.source, flag)) {
symbol =
&MakeSymbol(InclusiveScope(), name.source, Attrs{Attr::INTRINSIC});
} else {
symbol = &MakeSymbol(context().globalScope(), name.source, Attrs{});
}
Resolve(name, *symbol);
if (symbol->has<ModuleDetails>()) {
SayWithDecl(name, *symbol,
"Use of '%s' as a procedure conflicts with its declaration"_err_en_US);
return;
}
if (!symbol->attrs().test(Attr::INTRINSIC)) {
if (isImplicitNoneExternal() && !symbol->attrs().test(Attr::EXTERNAL)) {
Say(name,
"'%s' is an external procedure without the EXTERNAL"
" attribute in a scope with IMPLICIT NONE(EXTERNAL)"_err_en_US);
return;
}
MakeExternal(*symbol);
}
ConvertToProcEntity(*symbol);
SetProcFlag(name, *symbol, flag);
} else if (CheckUseError(name)) {
// error was reported
} else {
symbol = &Resolve(name, symbol)->GetUltimate();
bool convertedToProcEntity{ConvertToProcEntity(*symbol)};
if (convertedToProcEntity && !symbol->attrs().test(Attr::EXTERNAL) &&
IsIntrinsic(symbol->name(), flag) && !IsDummy(*symbol)) {
symbol->attrs().set(Attr::INTRINSIC);
// 8.2(3): ignore type from intrinsic in type-declaration-stmt
symbol->get<ProcEntityDetails>().set_interface(ProcInterface{});
}
if (!SetProcFlag(name, *symbol, flag)) {
return; // reported error
}
if (IsProcedure(*symbol) || symbol->has<DerivedTypeDetails>() ||
symbol->has<ObjectEntityDetails>() ||
symbol->has<AssocEntityDetails>()) {
// Symbols with DerivedTypeDetails, ObjectEntityDetails and
// AssocEntityDetails are accepted here as procedure-designators because
// this means the related FunctionReference are mis-parsed structure
// constructors or array references that will be fixed later when
// analyzing expressions.
} else if (symbol->test(Symbol::Flag::Implicit)) {
Say(name,
"Use of '%s' as a procedure conflicts with its implicit definition"_err_en_US);
} else {
SayWithDecl(name, *symbol,
"Use of '%s' as a procedure conflicts with its declaration"_err_en_US);
}
}
}
// Variant of HandleProcedureName() for use while skimming the executable
// part of a subprogram to catch calls to dummy procedures that are part
// of the subprogram's interface, and to mark as procedures any symbols
// that might otherwise have been miscategorized as objects.
void ResolveNamesVisitor::NoteExecutablePartCall(
Symbol::Flag flag, const parser::Call &call) {
auto &designator{std::get<parser::ProcedureDesignator>(call.t)};
if (const auto *name{std::get_if<parser::Name>(&designator.u)}) {
// Subtlety: The symbol pointers in the parse tree are not set, because
// they might end up resolving elsewhere (e.g., construct entities in
// SELECT TYPE).
if (Symbol * symbol{currScope().FindSymbol(name->source)}) {
Symbol::Flag other{flag == Symbol::Flag::Subroutine
? Symbol::Flag::Function
: Symbol::Flag::Subroutine};
if (!symbol->test(other)) {
ConvertToProcEntity(*symbol);
if (symbol->has<ProcEntityDetails>()) {
symbol->set(flag);
if (IsDummy(*symbol)) {
symbol->attrs().set(Attr::EXTERNAL);
}
ApplyImplicitRules(*symbol);
}
}
}
}
}
// Check and set the Function or Subroutine flag on symbol; false on error.
bool ResolveNamesVisitor::SetProcFlag(
const parser::Name &name, Symbol &symbol, Symbol::Flag flag) {
if (symbol.test(Symbol::Flag::Function) && flag == Symbol::Flag::Subroutine) {
SayWithDecl(
name, symbol, "Cannot call function '%s' like a subroutine"_err_en_US);
return false;
} else if (symbol.test(Symbol::Flag::Subroutine) &&
flag == Symbol::Flag::Function) {
SayWithDecl(
name, symbol, "Cannot call subroutine '%s' like a function"_err_en_US);
return false;
} else if (symbol.has<ProcEntityDetails>()) {
symbol.set(flag); // in case it hasn't been set yet
if (flag == Symbol::Flag::Function) {
ApplyImplicitRules(symbol);
}
} else if (symbol.GetType() && flag == Symbol::Flag::Subroutine) {
SayWithDecl(
name, symbol, "Cannot call function '%s' like a subroutine"_err_en_US);
}
return true;
}
bool ModuleVisitor::Pre(const parser::AccessStmt &x) {
Attr accessAttr{AccessSpecToAttr(std::get<parser::AccessSpec>(x.t))};
if (!currScope().IsModule()) { // C869
Say(currStmtSource().value(),
"%s statement may only appear in the specification part of a module"_err_en_US,
EnumToString(accessAttr));
return false;
}
const auto &accessIds{std::get<std::list<parser::AccessId>>(x.t)};
if (accessIds.empty()) {
if (prevAccessStmt_) { // C869
Say("The default accessibility of this module has already been declared"_err_en_US)
.Attach(*prevAccessStmt_, "Previous declaration"_en_US);
}
prevAccessStmt_ = currStmtSource();
defaultAccess_ = accessAttr;
} else {
for (const auto &accessId : accessIds) {
std::visit(
common::visitors{
[=](const parser::Name &y) {
Resolve(y, SetAccess(y.source, accessAttr));
},
[=](const Indirection<parser::GenericSpec> &y) {
auto info{GenericSpecInfo{y.value()}};
const auto &symbolName{info.symbolName()};
if (auto *symbol{info.FindInScope(context(), currScope())}) {
info.Resolve(&SetAccess(symbolName, accessAttr, symbol));
} else if (info.kind().IsName()) {
info.Resolve(&SetAccess(symbolName, accessAttr));
} else {
Say(symbolName, "Generic spec '%s' not found"_err_en_US);
}
},
},
accessId.u);
}
}
return false;
}
// Set the access specification for this symbol.
Symbol &ModuleVisitor::SetAccess(
const SourceName &name, Attr attr, Symbol *symbol) {
if (!symbol) {
symbol = &MakeSymbol(name);
}
Attrs &attrs{symbol->attrs()};
if (attrs.HasAny({Attr::PUBLIC, Attr::PRIVATE})) {
// PUBLIC/PRIVATE already set: make it a fatal error if it changed
Attr prev = attrs.test(Attr::PUBLIC) ? Attr::PUBLIC : Attr::PRIVATE;
Say(name,
WithIsFatal(
"The accessibility of '%s' has already been specified as %s"_en_US,
attr != prev),
MakeOpName(name), EnumToString(prev));
} else {
attrs.set(attr);
}
return *symbol;
}
static bool NeedsExplicitType(const Symbol &symbol) {
if (symbol.has<UnknownDetails>()) {
return true;
} else if (const auto *details{symbol.detailsIf<EntityDetails>()}) {
return !details->type();
} else if (const auto *details{symbol.detailsIf<ObjectEntityDetails>()}) {
return !details->type();
} else if (const auto *details{symbol.detailsIf<ProcEntityDetails>()}) {
return !details->interface().symbol() && !details->interface().type();
} else {
return false;
}
}
bool ResolveNamesVisitor::Pre(const parser::SpecificationPart &x) {
const auto &[accDecls, ompDecls, compilerDirectives, useStmts, importStmts,
implicitPart, decls] = x.t;
auto flagRestorer{common::ScopedSet(inSpecificationPart_, true)};
Walk(accDecls);
Walk(ompDecls);
Walk(compilerDirectives);
Walk(useStmts);
Walk(importStmts);
Walk(implicitPart);
auto setRestorer{
common::ScopedSet(specPartForwardRefs_, std::set<SourceName>{})};
for (const auto &decl : decls) {
if (const auto *spec{
std::get_if<parser::SpecificationConstruct>(&decl.u)}) {
PreSpecificationConstruct(*spec);
}
}
Walk(decls);
FinishSpecificationPart(decls);
return false;
}
// Initial processing on specification constructs, before visiting them.
void ResolveNamesVisitor::PreSpecificationConstruct(
const parser::SpecificationConstruct &spec) {
std::visit(
common::visitors{
[&](const parser::Statement<Indirection<parser::GenericStmt>> &y) {
CreateGeneric(std::get<parser::GenericSpec>(y.statement.value().t));
},
[&](const Indirection<parser::InterfaceBlock> &y) {
const auto &stmt{std::get<parser::Statement<parser::InterfaceStmt>>(
y.value().t)};
if (const auto *spec{parser::Unwrap<parser::GenericSpec>(stmt)}) {
CreateGeneric(*spec);
}
},
[&](const parser::Statement<parser::OtherSpecificationStmt> &y) {
if (const auto *commonStmt{parser::Unwrap<parser::CommonStmt>(y)}) {
CreateCommonBlockSymbols(*commonStmt);
}
},
[&](const auto &) {},
},
spec.u);
}
void ResolveNamesVisitor::CreateCommonBlockSymbols(
const parser::CommonStmt &commonStmt) {
for (const parser::CommonStmt::Block &block : commonStmt.blocks) {
const auto &[name, objects] = block.t;
Symbol &commonBlock{MakeCommonBlockSymbol(name)};
for (const auto &object : objects) {
Symbol &obj{DeclareObjectEntity(std::get<parser::Name>(object.t))};
if (auto *details{obj.detailsIf<ObjectEntityDetails>()}) {
details->set_commonBlock(commonBlock);
commonBlock.get<CommonBlockDetails>().add_object(obj);
}
}
}
}
void ResolveNamesVisitor::CreateGeneric(const parser::GenericSpec &x) {
auto info{GenericSpecInfo{x}};
const SourceName &symbolName{info.symbolName()};
if (IsLogicalConstant(context(), symbolName)) {
Say(symbolName,
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
return;
}
GenericDetails genericDetails;
if (Symbol * existing{info.FindInScope(context(), currScope())}) {
if (existing->has<GenericDetails>()) {
info.Resolve(existing);
return; // already have generic, add to it
}
Symbol &ultimate{existing->GetUltimate()};
if (auto *ultimateDetails{ultimate.detailsIf<GenericDetails>()}) {
// convert a use-associated generic into a local generic
genericDetails.CopyFrom(*ultimateDetails);
AddGenericUse(genericDetails, existing->name(),
existing->get<UseDetails>().symbol());
} else if (ultimate.has<SubprogramDetails>() ||
ultimate.has<SubprogramNameDetails>()) {
genericDetails.set_specific(ultimate);
} else if (ultimate.has<DerivedTypeDetails>()) {
genericDetails.set_derivedType(ultimate);
} else {
SayAlreadyDeclared(symbolName, *existing);
}
EraseSymbol(*existing);
}
info.Resolve(&MakeSymbol(symbolName, Attrs{}, std::move(genericDetails)));
}
void ResolveNamesVisitor::FinishSpecificationPart(
const std::list<parser::DeclarationConstruct> &decls) {
badStmtFuncFound_ = false;
CheckImports();
bool inModule{currScope().kind() == Scope::Kind::Module};
for (auto &pair : currScope()) {
auto &symbol{*pair.second};
if (NeedsExplicitType(symbol)) {
ApplyImplicitRules(symbol);
}
if (symbol.has<GenericDetails>()) {
CheckGenericProcedures(symbol);
}
if (inModule && symbol.attrs().test(Attr::EXTERNAL) &&
!symbol.test(Symbol::Flag::Function) &&
!symbol.test(Symbol::Flag::Subroutine)) {
// in a module, external proc without return type is subroutine
symbol.set(
symbol.GetType() ? Symbol::Flag::Function : Symbol::Flag::Subroutine);
}
if (!symbol.has<HostAssocDetails>()) {
CheckPossibleBadForwardRef(symbol);
}
}
currScope().InstantiateDerivedTypes(context());
for (const auto &decl : decls) {
if (const auto *statement{std::get_if<
parser::Statement<common::Indirection<parser::StmtFunctionStmt>>>(
&decl.u)}) {
AnalyzeStmtFunctionStmt(statement->statement.value());
}
}
// TODO: what about instantiations in BLOCK?
CheckSaveStmts();
CheckCommonBlocks();
if (!inInterfaceBlock()) {
// TODO: warn for the case where the EQUIVALENCE statement is in a
// procedure declaration in an interface block
CheckEquivalenceSets();
}
}
// Analyze the bodies of statement functions now that the symbols in this
// specification part have been fully declared and implicitly typed.
void ResolveNamesVisitor::AnalyzeStmtFunctionStmt(
const parser::StmtFunctionStmt &stmtFunc) {
Symbol *symbol{std::get<parser::Name>(stmtFunc.t).symbol};
if (!symbol || !symbol->has<SubprogramDetails>()) {
return;
}
auto &details{symbol->get<SubprogramDetails>()};
auto expr{AnalyzeExpr(
context(), std::get<parser::Scalar<parser::Expr>>(stmtFunc.t))};
if (!expr) {
context().SetError(*symbol);
return;
}
if (auto type{evaluate::DynamicType::From(*symbol)}) {
auto converted{ConvertToType(*type, std::move(*expr))};
if (!converted) {
context().SetError(*symbol);
return;
}
details.set_stmtFunction(std::move(*converted));
} else {
details.set_stmtFunction(std::move(*expr));
}
}
void ResolveNamesVisitor::CheckImports() {
auto &scope{currScope()};
switch (scope.GetImportKind()) {
case common::ImportKind::None:
break;
case common::ImportKind::All:
// C8102: all entities in host must not be hidden
for (const auto &pair : scope.parent()) {
auto &name{pair.first};
std::optional<SourceName> scopeName{scope.GetName()};
if (!scopeName || name != *scopeName) {
CheckImport(prevImportStmt_.value(), name);
}
}
break;
case common::ImportKind::Default:
case common::ImportKind::Only:
// C8102: entities named in IMPORT must not be hidden
for (auto &name : scope.importNames()) {
CheckImport(name, name);
}
break;
}
}
void ResolveNamesVisitor::CheckImport(
const SourceName &location, const SourceName &name) {
if (auto *symbol{FindInScope(currScope(), name)}) {
Say(location, "'%s' from host is not accessible"_err_en_US, name)
.Attach(symbol->name(), "'%s' is hidden by this entity"_en_US,
symbol->name());
}
}
bool ResolveNamesVisitor::Pre(const parser::ImplicitStmt &x) {
return CheckNotInBlock("IMPLICIT") && // C1107
ImplicitRulesVisitor::Pre(x);
}
void ResolveNamesVisitor::Post(const parser::PointerObject &x) {
std::visit(common::visitors{
[&](const parser::Name &x) { ResolveName(x); },
[&](const parser::StructureComponent &x) {
ResolveStructureComponent(x);
},
},
x.u);
}
void ResolveNamesVisitor::Post(const parser::AllocateObject &x) {
std::visit(common::visitors{
[&](const parser::Name &x) { ResolveName(x); },
[&](const parser::StructureComponent &x) {
ResolveStructureComponent(x);
},
},
x.u);
}
bool ResolveNamesVisitor::Pre(const parser::PointerAssignmentStmt &x) {
const auto &dataRef{std::get<parser::DataRef>(x.t)};
const auto &bounds{std::get<parser::PointerAssignmentStmt::Bounds>(x.t)};
const auto &expr{std::get<parser::Expr>(x.t)};
ResolveDataRef(dataRef);
Walk(bounds);
// Resolve unrestricted specific intrinsic procedures as in "p => cos".
if (const parser::Name * name{parser::Unwrap<parser::Name>(expr)}) {
if (NameIsKnownOrIntrinsic(*name)) {
return false;
}
}
Walk(expr);
return false;
}
void ResolveNamesVisitor::Post(const parser::Designator &x) {
ResolveDesignator(x);
}
void ResolveNamesVisitor::Post(const parser::ProcComponentRef &x) {
ResolveStructureComponent(x.v.thing);
}
void ResolveNamesVisitor::Post(const parser::TypeGuardStmt &x) {
DeclTypeSpecVisitor::Post(x);
ConstructVisitor::Post(x);
}
bool ResolveNamesVisitor::Pre(const parser::StmtFunctionStmt &x) {
CheckNotInBlock("STATEMENT FUNCTION"); // C1107
if (HandleStmtFunction(x)) {
return false;
} else {
// This is an array element assignment: resolve names of indices
const auto &names{std::get<std::list<parser::Name>>(x.t)};
for (auto &name : names) {
ResolveName(name);
}
return true;
}
}
bool ResolveNamesVisitor::Pre(const parser::DefinedOpName &x) {
const parser::Name &name{x.v};
if (FindSymbol(name)) {
// OK
} else if (IsLogicalConstant(context(), name.source)) {
Say(name,
"Logical constant '%s' may not be used as a defined operator"_err_en_US);
} else {
// Resolved later in expression semantics
MakePlaceholder(name, MiscDetails::Kind::TypeBoundDefinedOp);
}
return false;
}
void ResolveNamesVisitor::Post(const parser::AssignStmt &x) {
if (auto *name{ResolveName(std::get<parser::Name>(x.t))}) {
ConvertToObjectEntity(DEREF(name->symbol));
}
}
void ResolveNamesVisitor::Post(const parser::AssignedGotoStmt &x) {
if (auto *name{ResolveName(std::get<parser::Name>(x.t))}) {
ConvertToObjectEntity(DEREF(name->symbol));
}
}
bool ResolveNamesVisitor::Pre(const parser::ProgramUnit &x) {
if (std::holds_alternative<common::Indirection<parser::CompilerDirective>>(
x.u)) {
// TODO: global directives
return true;
}
auto root{ProgramTree::Build(x)};
SetScope(context().globalScope());
ResolveSpecificationParts(root);
FinishSpecificationParts(root);
inExecutionPart_ = true;
ResolveExecutionParts(root);
inExecutionPart_ = false;
ResolveAccParts(context(), x);
ResolveOmpParts(context(), x);
return false;
}
// References to procedures need to record that their symbols are known
// to be procedures, so that they don't get converted to objects by default.
class ExecutionPartSkimmer {
public:
explicit ExecutionPartSkimmer(ResolveNamesVisitor &resolver)
: resolver_{resolver} {}
void Walk(const parser::ExecutionPart *exec) {
if (exec) {
parser::Walk(*exec, *this);
}
}
template <typename A> bool Pre(const A &) { return true; }
template <typename A> void Post(const A &) {}
void Post(const parser::FunctionReference &fr) {
resolver_.NoteExecutablePartCall(Symbol::Flag::Function, fr.v);
}
void Post(const parser::CallStmt &cs) {
resolver_.NoteExecutablePartCall(Symbol::Flag::Subroutine, cs.v);
}
private:
ResolveNamesVisitor &resolver_;
};
// Build the scope tree and resolve names in the specification parts of this
// node and its children
void ResolveNamesVisitor::ResolveSpecificationParts(ProgramTree &node) {
if (node.isSpecificationPartResolved()) {
return; // been here already
}
node.set_isSpecificationPartResolved();
if (!BeginScopeForNode(node)) {
return; // an error prevented scope from being created
}
Scope &scope{currScope()};
node.set_scope(scope);
AddSubpNames(node);
std::visit(
[&](const auto *x) {
if (x) {
Walk(*x);
}
},
node.stmt());
Walk(node.spec());
// If this is a function, convert result to an object. This is to prevent the
// result from being converted later to a function symbol if it is called
// inside the function.
// If the result is function pointer, then ConvertToObjectEntity will not
// convert the result to an object, and calling the symbol inside the function
// will result in calls to the result pointer.
// A function cannot be called recursively if RESULT was not used to define a
// distinct result name (15.6.2.2 point 4.).
if (Symbol * symbol{scope.symbol()}) {
if (auto *details{symbol->detailsIf<SubprogramDetails>()}) {
if (details->isFunction()) {
ConvertToObjectEntity(const_cast<Symbol &>(details->result()));
}
}
}
if (node.IsModule()) {
ApplyDefaultAccess();
}
for (auto &child : node.children()) {
ResolveSpecificationParts(child);
}
ExecutionPartSkimmer{*this}.Walk(node.exec());
PopScope();
// Ensure that every object entity has a type.
for (auto &pair : *node.scope()) {
ApplyImplicitRules(*pair.second);
}
}
// Add SubprogramNameDetails symbols for module and internal subprograms
void ResolveNamesVisitor::AddSubpNames(ProgramTree &node) {
auto kind{
node.IsModule() ? SubprogramKind::Module : SubprogramKind::Internal};
for (auto &child : node.children()) {
auto &symbol{MakeSymbol(child.name(), SubprogramNameDetails{kind, child})};
symbol.set(child.GetSubpFlag());
}
}
// Push a new scope for this node or return false on error.
bool ResolveNamesVisitor::BeginScopeForNode(const ProgramTree &node) {
switch (node.GetKind()) {
SWITCH_COVERS_ALL_CASES
case ProgramTree::Kind::Program:
PushScope(Scope::Kind::MainProgram,
&MakeSymbol(node.name(), MainProgramDetails{}));
return true;
case ProgramTree::Kind::Function:
case ProgramTree::Kind::Subroutine:
return BeginSubprogram(
node.name(), node.GetSubpFlag(), node.HasModulePrefix());
case ProgramTree::Kind::MpSubprogram:
return BeginMpSubprogram(node.name());
case ProgramTree::Kind::Module:
BeginModule(node.name(), false);
return true;
case ProgramTree::Kind::Submodule:
return BeginSubmodule(node.name(), node.GetParentId());
case ProgramTree::Kind::BlockData:
PushBlockDataScope(node.name());
return true;
}
}
// Some analyses and checks, such as the processing of initializers of
// pointers, are deferred until all of the pertinent specification parts
// have been visited. This deferred processing enables the use of forward
// references in these circumstances.
class DeferredCheckVisitor {
public:
explicit DeferredCheckVisitor(ResolveNamesVisitor &resolver)
: resolver_{resolver} {}
template <typename A> void Walk(const A &x) { parser::Walk(x, *this); }
template <typename A> bool Pre(const A &) { return true; }
template <typename A> void Post(const A &) {}
void Post(const parser::DerivedTypeStmt &x) {
const auto &name{std::get<parser::Name>(x.t)};
if (Symbol * symbol{name.symbol}) {
if (Scope * scope{symbol->scope()}) {
if (scope->IsDerivedType()) {
resolver_.PushScope(*scope);
pushedScope_ = true;
}
}
}
}
void Post(const parser::EndTypeStmt &) {
if (pushedScope_) {
resolver_.PopScope();
pushedScope_ = false;
}
}
void Post(const parser::ProcInterface &pi) {
if (const auto *name{std::get_if<parser::Name>(&pi.u)}) {
resolver_.CheckExplicitInterface(*name);
}
}
bool Pre(const parser::EntityDecl &decl) {
Init(std::get<parser::Name>(decl.t),
std::get<std::optional<parser::Initialization>>(decl.t));
return false;
}
bool Pre(const parser::ComponentDecl &decl) {
Init(std::get<parser::Name>(decl.t),
std::get<std::optional<parser::Initialization>>(decl.t));
return false;
}
bool Pre(const parser::ProcDecl &decl) {
if (const auto &init{
std::get<std::optional<parser::ProcPointerInit>>(decl.t)}) {
resolver_.PointerInitialization(std::get<parser::Name>(decl.t), *init);
}
return false;
}
void Post(const parser::TypeBoundProcedureStmt::WithInterface &tbps) {
resolver_.CheckExplicitInterface(tbps.interfaceName);
}
void Post(const parser::TypeBoundProcedureStmt::WithoutInterface &tbps) {
if (pushedScope_) {
resolver_.CheckBindings(tbps);
}
}
private:
void Init(const parser::Name &name,
const std::optional<parser::Initialization> &init) {
if (init) {
if (const auto *target{
std::get_if<parser::InitialDataTarget>(&init->u)}) {
resolver_.PointerInitialization(name, *target);
}
}
}
ResolveNamesVisitor &resolver_;
bool pushedScope_{false};
};
// Perform checks and completions that need to happen after all of
// the specification parts but before any of the execution parts.
void ResolveNamesVisitor::FinishSpecificationParts(const ProgramTree &node) {
if (!node.scope()) {
return; // error occurred creating scope
}
SetScope(*node.scope());
// The initializers of pointers, the default initializers of pointer
// components, and non-deferred type-bound procedure bindings have not
// yet been traversed.
// We do that now, when any (formerly) forward references that appear
// in those initializers will resolve to the right symbols without
// incurring spurious errors with IMPLICIT NONE.
DeferredCheckVisitor{*this}.Walk(node.spec());
DeferredCheckVisitor{*this}.Walk(node.exec()); // for BLOCK
for (Scope &childScope : currScope().children()) {
if (childScope.IsParameterizedDerivedTypeInstantiation()) {
FinishDerivedTypeInstantiation(childScope);
}
}
for (const auto &child : node.children()) {
FinishSpecificationParts(child);
}
}
// Duplicate and fold component object pointer default initializer designators
// using the actual type parameter values of each particular instantiation.
// Validation is done later in declaration checking.
void ResolveNamesVisitor::FinishDerivedTypeInstantiation(Scope &scope) {
CHECK(scope.IsDerivedType() && !scope.symbol());
if (DerivedTypeSpec * spec{scope.derivedTypeSpec()}) {
spec->Instantiate(currScope(), context());
const Symbol &origTypeSymbol{spec->typeSymbol()};
if (const Scope * origTypeScope{origTypeSymbol.scope()}) {
CHECK(origTypeScope->IsDerivedType() &&
origTypeScope->symbol() == &origTypeSymbol);
auto &foldingContext{GetFoldingContext()};
auto restorer{foldingContext.WithPDTInstance(*spec)};
for (auto &pair : scope) {
Symbol &comp{*pair.second};
const Symbol &origComp{DEREF(FindInScope(*origTypeScope, comp.name()))};
if (IsPointer(comp)) {
if (auto *details{comp.detailsIf<ObjectEntityDetails>()}) {
auto origDetails{origComp.get<ObjectEntityDetails>()};
if (const MaybeExpr & init{origDetails.init()}) {
SomeExpr newInit{*init};
MaybeExpr folded{
evaluate::Fold(foldingContext, std::move(newInit))};
details->set_init(std::move(folded));
}
}
}
}
}
}
}
// Resolve names in the execution part of this node and its children
void ResolveNamesVisitor::ResolveExecutionParts(const ProgramTree &node) {
if (!node.scope()) {
return; // error occurred creating scope
}
SetScope(*node.scope());
if (const auto *exec{node.exec()}) {
Walk(*exec);
}
PopScope(); // converts unclassified entities into objects
for (const auto &child : node.children()) {
ResolveExecutionParts(child);
}
}
void ResolveNamesVisitor::Post(const parser::Program &) {
// ensure that all temps were deallocated
CHECK(!attrs_);
CHECK(!GetDeclTypeSpec());
}
// A singleton instance of the scope -> IMPLICIT rules mapping is
// shared by all instances of ResolveNamesVisitor and accessed by this
// pointer when the visitors (other than the top-level original) are
// constructed.
static ImplicitRulesMap *sharedImplicitRulesMap{nullptr};
bool ResolveNames(SemanticsContext &context, const parser::Program &program) {
ImplicitRulesMap implicitRulesMap;
auto restorer{common::ScopedSet(sharedImplicitRulesMap, &implicitRulesMap)};
ResolveNamesVisitor{context, implicitRulesMap}.Walk(program);
return !context.AnyFatalError();
}
// Processes a module (but not internal) function when it is referenced
// in a specification expression in a sibling procedure.
void ResolveSpecificationParts(
SemanticsContext &context, const Symbol &subprogram) {
auto originalLocation{context.location()};
ResolveNamesVisitor visitor{context, DEREF(sharedImplicitRulesMap)};
ProgramTree &node{subprogram.get<SubprogramNameDetails>().node()};
const Scope &moduleScope{subprogram.owner()};
visitor.SetScope(const_cast<Scope &>(moduleScope));
visitor.ResolveSpecificationParts(node);
context.set_location(std::move(originalLocation));
}
} // namespace Fortran::semantics