42 lines
550 B
Rust
42 lines
550 B
Rust
//@ run-pass
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#![feature(const_trait_impl, effects)]
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#[const_trait]
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trait Bar {
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fn bar() -> u8;
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}
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#[const_trait]
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trait Foo {
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fn foo() -> u8 where Self: ~const Bar {
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<Self as Bar>::bar() * 6
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}
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}
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struct NonConst;
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struct Const;
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impl Bar for NonConst {
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fn bar() -> u8 {
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3
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}
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}
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impl Foo for NonConst {}
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impl const Bar for Const {
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fn bar() -> u8 {
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4
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}
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}
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impl const Foo for Const {}
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fn main() {
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const ANS1: u8 = Const::foo();
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let ans2 = NonConst::foo();
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assert_eq!(ANS1 + ans2, 42);
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}
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