mirror of https://github.com/rust-lang/rust
38 lines
673 B
Rust
38 lines
673 B
Rust
//@ check-pass
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//@ aux-build:test-macros.rs
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#![feature(decl_macro)]
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#![feature(stmt_expr_attributes)]
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#![no_std] // Don't load unnecessary hygiene information from std
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extern crate std;
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#[macro_use]
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extern crate test_macros;
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macro mac {
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(expr $expr:expr) => {
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#[derive(Print)]
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enum E {
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V = { let _ = $expr; 0 },
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}
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},
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(stmt $stmt:stmt) => {
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#[derive(Print)]
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enum E {
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V = { let _ = { $stmt }; 0 },
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}
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},
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}
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const PATH: u8 = 2;
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fn main() {
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mac!(expr #[allow(warnings)] 0);
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mac!(stmt 0);
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mac!(stmt {});
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mac!(stmt PATH);
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mac!(stmt 0 + 1);
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mac!(stmt PATH + 1);
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}
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