| //@aux-build:proc_macros.rs |
| //@run-rustfix |
| #![warn(clippy::uninlined_format_args)] |
| #![allow(named_arguments_used_positionally, unused)] |
| #![allow(clippy::eq_op, clippy::format_in_format_args, clippy::print_literal)] |
| |
| extern crate proc_macros; |
| use proc_macros::with_span; |
| |
| macro_rules! no_param_str { |
| () => { |
| "{}" |
| }; |
| } |
| |
| macro_rules! my_println { |
| ($($args:tt),*) => {{ |
| println!($($args),*) |
| }}; |
| } |
| |
| macro_rules! my_println_args { |
| ($($args:tt),*) => {{ |
| println!("foo: {}", format_args!($($args),*)) |
| }}; |
| } |
| |
| fn tester(fn_arg: i32) { |
| let local_i32 = 1; |
| let local_f64 = 2.0; |
| let local_opt: Option<i32> = Some(3); |
| let width = 4; |
| let prec = 5; |
| let val = 6; |
| |
| // make sure this file hasn't been corrupted with tabs converted to spaces |
| // let _ = ' '; // <- this is a single tab character |
| let _: &[u8; 3] = b" "; // <- <tab><space><tab> |
| |
| println!("val='{local_i32}'"); |
| println!("val='{local_i32}'"); // 3 spaces |
| println!("val='{local_i32}'"); // tab |
| println!("val='{local_i32}'"); // space+tab |
| println!("val='{local_i32}'"); // tab+space |
| println!( |
| "val='{local_i32}'" |
| ); |
| println!("{local_i32}"); |
| println!("{fn_arg}"); |
| println!("{local_i32:?}"); |
| println!("{local_i32:#?}"); |
| println!("{local_i32:4}"); |
| println!("{local_i32:04}"); |
| println!("{local_i32:<3}"); |
| println!("{local_i32:#010x}"); |
| println!("{local_f64:.1}"); |
| println!("Hello {} is {:.*}", "x", local_i32, local_f64); |
| println!("Hello {} is {:.*}", local_i32, 5, local_f64); |
| println!("Hello {} is {2:.*}", local_i32, 5, local_f64); |
| println!("{local_i32} {local_f64}"); |
| println!("{}, {}", local_i32, local_opt.unwrap()); |
| println!("{val}"); |
| println!("{val}"); |
| println!("{} {1}", local_i32, 42); |
| println!("val='{local_i32}'"); |
| println!("val='{local_i32}'"); |
| println!("val='{local_i32}'"); |
| println!("val='{fn_arg}'"); |
| println!("{local_i32}"); |
| println!("{local_i32:?}"); |
| println!("{local_i32:#?}"); |
| println!("{local_i32:04}"); |
| println!("{local_i32:<3}"); |
| println!("{local_i32:#010x}"); |
| println!("{local_f64:.1}"); |
| println!("{local_i32} {local_i32}"); |
| println!("{local_f64} {local_i32} {local_i32} {local_f64}"); |
| println!("{local_i32} {local_f64}"); |
| println!("{local_f64} {local_i32}"); |
| println!("{local_f64} {local_i32} {local_f64} {local_i32}"); |
| println!("{1} {0}", "str", local_i32); |
| println!("{local_i32}"); |
| println!("{local_i32:width$}"); |
| println!("{local_i32:width$}"); |
| println!("{local_i32:.prec$}"); |
| println!("{local_i32:.prec$}"); |
| println!("{val:val$}"); |
| println!("{val:val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{val:val$.val$}"); |
| println!("{width:width$}"); |
| println!("{local_i32:width$}"); |
| println!("{width:width$}"); |
| println!("{local_i32:width$}"); |
| println!("{prec:.prec$}"); |
| println!("{local_i32:.prec$}"); |
| println!("{prec:.prec$}"); |
| println!("{local_i32:.prec$}"); |
| println!("{width:width$.prec$}"); |
| println!("{width:width$.prec$}"); |
| println!("{local_f64:width$.prec$}"); |
| println!("{local_f64:width$.prec$} {local_f64} {width} {prec}"); |
| println!( |
| "{local_i32:width$.prec$} {local_i32:prec$.width$} {width:local_i32$.prec$} {width:prec$.local_i32$} {prec:local_i32$.width$} {prec:width$.local_i32$}", |
| ); |
| println!( |
| "{0:1$.2$} {0:2$.1$} {1:0$.2$} {1:2$.0$} {2:0$.1$} {2:1$.0$} {3}", |
| local_i32, |
| width, |
| prec, |
| 1 + 2 |
| ); |
| println!("Width = {local_i32}, value with width = {local_f64:local_i32$}"); |
| println!("{local_i32:width$.prec$}"); |
| println!("{width:width$.prec$}"); |
| println!("{}", format!("{}", local_i32)); |
| my_println!("{}", local_i32); |
| my_println_args!("{}", local_i32); |
| |
| // these should NOT be modified by the lint |
| println!(concat!("nope ", "{}"), local_i32); |
| println!("val='{local_i32}'"); |
| println!("val='{local_i32 }'"); |
| println!("val='{local_i32 }'"); // with tab |
| println!("val='{local_i32\n}'"); |
| println!("{}", usize::MAX); |
| println!("{}", local_opt.unwrap()); |
| println!( |
| "val='{local_i32 |
| }'" |
| ); |
| println!(no_param_str!(), local_i32); |
| |
| println!( |
| "{val}", |
| ); |
| println!("{val}"); |
| |
| println!(with_span!("{0} {1}" "{1} {0}"), local_i32, local_f64); |
| println!("{}", with_span!(span val)); |
| |
| if local_i32 > 0 { |
| panic!("p1 {local_i32}"); |
| } |
| if local_i32 > 0 { |
| panic!("p2 {local_i32}"); |
| } |
| if local_i32 > 0 { |
| panic!("p3 {local_i32}"); |
| } |
| if local_i32 > 0 { |
| panic!("p4 {local_i32}"); |
| } |
| } |
| |
| fn main() { |
| tester(42); |
| } |
| |
| #[clippy::msrv = "1.57"] |
| fn _under_msrv() { |
| let local_i32 = 1; |
| println!("don't expand='{}'", local_i32); |
| } |
| |
| #[clippy::msrv = "1.58"] |
| fn _meets_msrv() { |
| let local_i32 = 1; |
| println!("expand='{local_i32}'"); |
| } |
| |
| fn _do_not_fire() { |
| println!("{:?}", None::<()>); |
| } |
| |
| macro_rules! _internal { |
| ($($args:tt)*) => { |
| println!("{}", format_args!($($args)*)) |
| }; |
| } |
| |
| macro_rules! my_println2 { |
| ($target:expr, $($args:tt)+) => {{ |
| if $target { |
| _internal!($($args)+) |
| } |
| }}; |
| } |
| |
| macro_rules! my_println2_args { |
| ($target:expr, $($args:tt)+) => {{ |
| if $target { |
| _internal!("foo: {}", format_args!($($args)+)) |
| } |
| }}; |
| } |
| |
| macro_rules! my_concat { |
| ($fmt:literal $(, $e:expr)*) => { |
| println!(concat!("ERROR: ", $fmt), $($e,)*) |
| } |
| } |
| |
| macro_rules! my_good_macro { |
| ($fmt:literal $(, $e:expr)* $(,)?) => { |
| println!($fmt $(, $e)*) |
| } |
| } |
| |
| macro_rules! my_bad_macro { |
| ($fmt:literal, $($e:expr),*) => { |
| println!($fmt, $($e,)*) |
| } |
| } |
| |
| macro_rules! my_bad_macro2 { |
| ($fmt:literal) => { |
| let s = $fmt.clone(); |
| println!("{}", s); |
| }; |
| ($fmt:literal, $($e:expr)+) => { |
| println!($fmt, $($e,)*) |
| }; |
| } |
| |
| // This abomination was suggested by @Alexendoo, may the Rust gods have mercy on their soul... |
| // https://github.com/rust-lang/rust-clippy/pull/9948#issuecomment-1327965962 |
| macro_rules! used_twice { |
| ( |
| large = $large:literal, |
| small = $small:literal, |
| $val:expr, |
| ) => { |
| if $val < 5 { |
| println!($small, $val); |
| } else { |
| println!($large, $val); |
| } |
| }; |
| } |
| |
| fn tester2() { |
| let local_i32 = 1; |
| my_println2_args!(true, "{}", local_i32); |
| my_println2!(true, "{}", local_i32); |
| my_concat!("{}", local_i32); |
| my_good_macro!("{}", local_i32); |
| my_good_macro!("{}", local_i32,); |
| |
| // FIXME: Broken false positives, currently unhandled |
| my_bad_macro!("{}", local_i32); |
| my_bad_macro2!("{}", local_i32); |
| used_twice! { |
| large = "large value: {}", |
| small = "small value: {}", |
| local_i32, |
| }; |
| } |