mirror of https://github.com/rust-lang/rust
22 lines
563 B
Rust
22 lines
563 B
Rust
// Demonstrates and records a theoretical regressions / breaking changes caused by the
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// introduction of const trait bounds.
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// Setting the edition to 2018 since we don't regress `demo! { dyn const }` in Rust <2018.
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//@ edition:2018
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macro_rules! demo {
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($ty:ty) => { compile_error!("ty"); };
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//~^ ERROR ty
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//~| ERROR ty
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(impl $c:ident Trait) => {};
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(dyn $c:ident Trait) => {};
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}
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demo! { impl const Trait }
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//~^ ERROR const trait impls are experimental
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demo! { dyn const Trait }
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//~^ ERROR const trait impls are experimental
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fn main() {}
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