src/test/ui/macros/macro-multiple-matcher-bindings.rs


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21

// Test that duplicate matcher binding names are caught at declaration time, rather than at macro
// invocation time.

#![allow(unused_macros)]

macro_rules! foo1 {
    ($a:ident, $a:ident) => {}; //~ERROR duplicate matcher binding
    ($a:ident, $a:path) => {};  //~ERROR duplicate matcher binding
}

macro_rules! foo2 {
    ($a:ident) => {}; // OK
    ($a:path) => {};  // OK
}

macro_rules! foo3 {
    ($a:ident, $($a:ident),*) => {}; //~ERROR duplicate matcher binding
    ($($a:ident)+ # $($($a:path),+);*) => {}; //~ERROR duplicate matcher binding
}

fn main() {}