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35 lines
723 B
Rust
35 lines
723 B
Rust
//@ run-pass
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#![deny(meta_variable_misuse)]
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macro_rules! foo {
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($($m:ident $($f:ident $v:tt)+),*) => {
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$($(macro_rules! $f { () => { $v } })+)*
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$(macro_rules! $m { () => { $(fn $f() -> i32 { $v })+ } })*
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}
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}
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foo!(m a 1 b 2, n c 3);
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m!();
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n!();
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macro_rules! no_shadow {
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($x:tt) => { macro_rules! bar { ($x:tt) => { 42 }; } };
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}
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no_shadow!(z);
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macro_rules! make_plus {
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($n: ident $x:expr) => { macro_rules! $n { ($y:expr) => { $x + $y }; } };
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}
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make_plus!(add3 3);
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fn main() {
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assert_eq!(a!(), 1);
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assert_eq!(b!(), 2);
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assert_eq!(c!(), 3);
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assert_eq!(a(), 1);
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assert_eq!(b(), 2);
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assert_eq!(c(), 3);
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assert_eq!(bar!(z:tt), 42);
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assert_eq!(add3!(9), 12);
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}
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