File: issue-117284-arg-in-macro.rs

package info (click to toggle)
rustc 1.85.0%2Bdfsg3-1
  • links: PTS, VCS
  • area: main
  • in suites: experimental, forky, sid, trixie
  • size: 893,396 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,051; perl: 29; lisp: 29; ruby: 19; sql: 11
file content (17 lines) | stat: -rw-r--r-- 333 bytes parent folder | download | duplicates (6) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
 
#![deny(unused_variables)]
macro_rules! make_var {
    ($struct:ident, $var:ident) => {
        let $var = $struct.$var;
    };
}

#[allow(unused)]
struct MyStruct {
    var: i32,
}

fn main() {
    let s = MyStruct { var: 42 };
    make_var!(s, var); //~ ERROR unused variable: `var`
    let a = 1; //~ ERROR unused variable: `a`
}