mirror of https://github.com/rust-lang/rust
33 lines
629 B
Rust
33 lines
629 B
Rust
// Tests that using fulfillment in the trait solver means that we detect that a
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// method is impossible, leading to no ambiguity.
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//@ check-pass
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//@ revisions: current next
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//@ ignore-compare-mode-next-solver (explicit revisions)
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//@[next] compile-flags: -Znext-solver
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#[derive(Default)]
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struct W<A, B>(A, B);
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trait Constrain {
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type Output;
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}
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impl Constrain for i32 {
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type Output = u32;
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}
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trait Impossible {}
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impl<A, B> W<A, B> where A: Constrain<Output = B>, B: Impossible {
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fn method(&self) {}
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}
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impl W<i32, u32> {
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fn method(&self) {}
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}
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fn main() {
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let w: W<i32, _> = W::default();
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w.method();
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}
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