mirror of https://github.com/rust-lang/rust
20 lines
525 B
Rust
20 lines
525 B
Rust
//@ run-pass
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// Check that coercions unify the expected return type of a polymorphic
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// function call, instead of leaving the type variables as they were.
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//@ pretty-expanded FIXME #23616
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struct Foo;
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impl Foo {
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fn foo<T>(self, x: T) -> Option<T> { Some(x) }
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}
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pub fn main() {
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let _: Option<fn()> = Some(main);
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let _: Option<fn()> = Foo.foo(main);
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// The same two cases, with implicit type variables made explicit.
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let _: Option<fn()> = Some::<_>(main);
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let _: Option<fn()> = Foo.foo::<_>(main);
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}
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