16 lines
322 B
Rust
16 lines
322 B
Rust
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#![feature(rustc_attrs)]
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trait Foo<A> {
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fn foo(self);
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}
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#[rustc_on_unimplemented = "an impl did not match: {A} {B} {C}"]
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impl<A, B, C> Foo<A> for (A, B, C) {
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fn foo(self) {}
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}
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fn main() {
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Foo::<usize>::foo((1i32, 1i32, 1i32));
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//~^ ERROR the trait bound `(i32, i32, i32): Foo<usize>` is not satisfied
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}
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