mirror of https://github.com/rust-lang/rust
37 lines
709 B
Rust
37 lines
709 B
Rust
// Check that we disallow GAT param defaults, even with `invalid_type_param_default` allowed
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#![allow(invalid_type_param_default)]
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trait Trait {
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type Assoc<T = u32>;
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//~^ defaults for type parameters are only allowed
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}
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impl Trait for () {
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type Assoc<T = u32> = u64;
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//~^ defaults for type parameters are only allowed
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}
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impl Trait for u32 {
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type Assoc<T = u32> = T;
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//~^ defaults for type parameters are only allowed
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}
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trait Other {}
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impl Other for u32 {}
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fn foo<T>()
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where
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T: Trait<Assoc = u32>,
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T::Assoc: Other {
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}
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fn main() {
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// errors
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foo::<()>();
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//~^ ERROR type mismatch
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//~| ERROR `u64: Other` is not satisfied
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// works
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foo::<u32>();
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}
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