| # Copyright 2006 Google, Inc. All Rights Reserved. |
| # Licensed to PSF under a Contributor Agreement. |
| |
| """Fixer for apply(). |
| |
| This converts apply(func, v, k) into (func)(*v, **k).""" |
| |
| # Local imports |
| from .. import pytree |
| from ..pgen2 import token |
| from .. import fixer_base |
| from ..fixer_util import Call, Comma, parenthesize |
| |
| class FixApply(fixer_base.BaseFix): |
| BM_compatible = True |
| |
| PATTERN = """ |
| power< 'apply' |
| trailer< |
| '(' |
| arglist< |
| (not argument<NAME '=' any>) func=any ',' |
| (not argument<NAME '=' any>) args=any [',' |
| (not argument<NAME '=' any>) kwds=any] [','] |
| > |
| ')' |
| > |
| > |
| """ |
| |
| def transform(self, node, results): |
| syms = self.syms |
| assert results |
| func = results["func"] |
| args = results["args"] |
| kwds = results.get("kwds") |
| prefix = node.prefix |
| func = func.clone() |
| if (func.type not in (token.NAME, syms.atom) and |
| (func.type != syms.power or |
| func.children[-2].type == token.DOUBLESTAR)): |
| # Need to parenthesize |
| func = parenthesize(func) |
| func.prefix = "" |
| args = args.clone() |
| args.prefix = "" |
| if kwds is not None: |
| kwds = kwds.clone() |
| kwds.prefix = "" |
| l_newargs = [pytree.Leaf(token.STAR, u"*"), args] |
| if kwds is not None: |
| l_newargs.extend([Comma(), |
| pytree.Leaf(token.DOUBLESTAR, u"**"), |
| kwds]) |
| l_newargs[-2].prefix = u" " # that's the ** token |
| # XXX Sometimes we could be cleverer, e.g. apply(f, (x, y) + t) |
| # can be translated into f(x, y, *t) instead of f(*(x, y) + t) |
| #new = pytree.Node(syms.power, (func, ArgList(l_newargs))) |
| return Call(func, l_newargs, prefix=prefix) |
