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28 lines
521 B
Rust
28 lines
521 B
Rust
#![feature(const_trait_impl, effects)]
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struct S;
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#[const_trait]
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trait Foo {
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fn eq(&self, _: &Self) -> bool;
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}
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impl Foo for S {
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fn eq(&self, _: &S) -> bool {
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true
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}
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}
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const fn equals_self<T: ~const Foo>(t: &T) -> bool {
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true
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}
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// Calling `equals_self` with something that has a non-const impl should throw an error, despite
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// it not using the impl.
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pub const EQ: bool = equals_self(&S);
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//~^ ERROR
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// FIXME(effects) the diagnostics here isn't ideal, we shouldn't get `<false>`
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fn main() {}
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