36 lines
865 B
Rust
36 lines
865 B
Rust
#![feature(generic_const_exprs, adt_const_params, const_trait_impl)]
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#![allow(incomplete_features)]
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// test `N + N` unifies with explicit function calls for non-builtin-types
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#[derive(PartialEq, Eq)]
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struct Foo(u8);
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impl const std::ops::Add for Foo {
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type Output = Self;
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fn add(self, rhs: Self) -> Self::Output {
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self
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}
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}
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struct Evaluatable<const N: Foo>;
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fn foo<const N: Foo>(a: Evaluatable<{ N + N }>) {
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bar::<{ std::ops::Add::add(N, N) }>();
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}
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fn bar<const N: Foo>() {}
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// test that `N + N` unifies with explicit function calls for builin-types
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struct Evaluatable2<const N: usize>;
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fn foo2<const N: usize>(a: Evaluatable2<{ N + N }>) {
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bar2::<{ std::ops::Add::add(N, N) }>();
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//~^ error: unconstrained generic constant
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// FIXME(generic_const_exprs) make this not an error
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}
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fn bar2<const N: usize>() {}
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fn main() {}
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