33 lines
583 B
Rust
33 lines
583 B
Rust
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// compile-pass
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#![feature(underscore_const_names)]
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trait Trt {}
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struct Str {}
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impl Trt for Str {}
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macro_rules! check_impl {
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($struct:ident,$trait:ident) => {
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const _ : () = {
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use std::marker::PhantomData;
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struct ImplementsTrait<T: $trait>(PhantomData<T>);
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let _ = ImplementsTrait::<$struct>(PhantomData);
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()
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};
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}
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}
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#[deny(unused)]
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const _ : () = ();
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const _ : i32 = 42;
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const _ : Str = Str{};
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check_impl!(Str, Trt);
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check_impl!(Str, Trt);
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fn main() {
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check_impl!(Str, Trt);
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check_impl!(Str, Trt);
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}
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