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https://github.com/rust-lang/rust
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25 lines
309 B
Rust
25 lines
309 B
Rust
// run-pass
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#![feature(decl_macro)]
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trait Tr {
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fn f(&self) -> &'static str {
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"This shouldn't happen"
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}
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}
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pub macro m($t:ty) {
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impl Tr for $t {
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fn f(&self) -> &'static str {
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"Run me"
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}
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}
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}
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struct S;
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m!(S);
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fn main() {
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assert_eq!(S.f(), "Run me");
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}
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