1 // run-pass
2 #![deny(meta_variable_misuse)]
3
4 macro_rules! foo {
5 ($($m:ident $($f:ident $v:tt)+),*) => {
6 $($(macro_rules! $f { () => { $v } })+)*
7 $(macro_rules! $m { () => { $(fn $f() -> i32 { $v })+ } })*
8 }
9 }
10
11 foo!(m a 1 b 2, n c 3);
12 m!();
13 n!();
14
15 macro_rules! no_shadow {
16 ($x:tt) => { macro_rules! bar { ($x:tt) => { 42 }; } };
17 }
18 no_shadow!(z);
19
20 macro_rules! make_plus {
21 ($n: ident $x:expr) => { macro_rules! $n { ($y:expr) => { $x + $y }; } };
22 }
23 make_plus!(add3 3);
24
main()25 fn main() {
26 assert_eq!(a!(), 1);
27 assert_eq!(b!(), 2);
28 assert_eq!(c!(), 3);
29 assert_eq!(a(), 1);
30 assert_eq!(b(), 2);
31 assert_eq!(c(), 3);
32 assert_eq!(bar!(z:tt), 42);
33 assert_eq!(add3!(9), 12);
34 }
35