mirror of https://github.com/rust-lang/rust
15 lines
423 B
Rust
15 lines
423 B
Rust
#![feature(rustc_attrs)]
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#[rustc_dummy = stringify!(a)] // OK
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macro_rules! bar {
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() => {};
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}
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// FIXME?: `bar` here expands before `stringify` has a chance to expand.
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// `#[rustc_dummy = ...]` is validated and dropped during expansion of `bar`,
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// the "attribute value must be a literal" error comes from the validation.
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#[rustc_dummy = stringify!(b)] //~ ERROR attribute value must be a literal
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bar!();
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fn main() {}
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