mirror of https://github.com/rust-lang/rust
28 lines
485 B
Rust
28 lines
485 B
Rust
//@ build-fail
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trait Unsigned {
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const MAX: u8;
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}
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struct U8(u8);
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impl Unsigned for U8 {
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const MAX: u8 = 0xff;
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}
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struct Sum<A, B>(A, B);
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impl<A: Unsigned, B: Unsigned> Unsigned for Sum<A, B> {
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const MAX: u8 = A::MAX + B::MAX;
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//~^ ERROR evaluation of `<Sum<U8, U8> as Unsigned>::MAX` failed
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//~| ERROR evaluation of `<Sum<U8, U8> as Unsigned>::MAX` failed
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}
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fn foo<T>(_: T) -> &'static u8 {
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&Sum::<U8, U8>::MAX
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//~^ constant
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}
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fn main() {
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foo(0);
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}
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