File: stmt_expr_attr_macro_parse.rs

package info (click to toggle)
rustc-web 1.85.0%2Bdfsg3-1~deb12u3
  • links: PTS, VCS
  • area: main
  • in suites: bookworm, bookworm-proposed-updates
  • size: 1,759,988 kB
  • sloc: xml: 158,127; python: 35,830; javascript: 19,497; cpp: 19,002; sh: 17,245; ansic: 13,127; asm: 4,376; makefile: 1,056; lisp: 29; perl: 29; ruby: 19; sql: 11
file content (25 lines) | stat: -rw-r--r-- 450 bytes parent folder | download | duplicates (16) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
 
//@ run-pass
#![allow(unused_macro_rules)]

macro_rules! m {
    ($e:expr) => {
        "expr includes attr"
    };
    (#[$attr:meta] $e:expr) => {
        "expr excludes attr"
    }
}

macro_rules! n {
    (#[$attr:meta] $e:expr) => {
        "expr excludes attr"
    };
    ($e:expr) => {
        "expr includes attr"
    }
}

fn main() {
    assert_eq!(m!(#[attr] 1), "expr includes attr");
    assert_eq!(n!(#[attr] 1), "expr excludes attr");
}