mirror of https://github.com/rust-lang/rust
29 lines
553 B
Rust
29 lines
553 B
Rust
#![feature(generic_const_exprs)]
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#![allow(incomplete_features)]
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trait MiniTypeId {
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const TYPE_ID: u64;
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}
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impl<T> MiniTypeId for T {
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const TYPE_ID: u64 = 0;
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}
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enum Lift<const V: bool> {}
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trait IsFalse {}
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impl IsFalse for Lift<false> {}
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const fn is_same_type<T: MiniTypeId, U: MiniTypeId>() -> bool {
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T::TYPE_ID == U::TYPE_ID
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}
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fn requires_distinct<A, B>(_a: A, _b: B) where
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A: MiniTypeId, B: MiniTypeId,
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Lift<{is_same_type::<A, B>()}>: IsFalse {}
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fn main() {
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requires_distinct("str", 12);
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//~^ ERROR mismatched types
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}
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