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30 lines
527 B
Rust
30 lines
527 B
Rust
// Ensure macro metavariables are compared with legacy hygiene
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#![feature(rustc_attrs)]
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// run-pass
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macro_rules! make_mac {
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( $($dollar:tt $arg:ident),+ ) => {
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macro_rules! mac {
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( $($dollar $arg : ident),+ ) => {
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$( $dollar $arg )-+
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}
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}
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}
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}
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macro_rules! show_hygiene {
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( $dollar:tt $arg:ident ) => {
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make_mac!($dollar $arg, $dollar arg);
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}
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}
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show_hygiene!( $arg );
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fn main() {
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let x = 5;
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let y = 3;
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assert_eq!(2, mac!(x, y));
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}
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