29 lines
843 B
Rust
29 lines
843 B
Rust
// compile-flags: -Z chalk
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trait Foo { }
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impl Foo for i32 { }
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trait Bar { }
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impl Bar for i32 { }
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impl Bar for u32 { }
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fn only_foo<T: Foo>(_x: T) { }
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fn only_bar<T: Bar>(_x: T) { }
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fn main() {
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let x = 5.0;
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// The only type which implements `Foo` is `i32`, so the chalk trait solver
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// is expecting a variable of type `i32`. This behavior differs from the
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// old-style trait solver. I guess this will change, that's why I'm
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// adding that test.
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// FIXME(chalk): partially blocked on float/int special casing
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only_foo(x); //~ ERROR the trait bound `f64: Foo` is not satisfied
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// Here we have two solutions so we get back the behavior of the old-style
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// trait solver.
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// FIXME(chalk): blocked on float/int special casing
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//only_bar(x); // ERROR the trait bound `{float}: Bar` is not satisfied
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}
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