19 lines
462 B
Rust
19 lines
462 B
Rust
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// Checks that const expressions have a useful note explaining why they can't be evaluated.
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// The note should relate to the fact that it cannot be shown forall N that it maps 1-1 to a new
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// type.
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#![feature(const_generics)]
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#![allow(incomplete_features)]
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struct Collatz<const N: Option<usize>>;
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impl <const N: usize> Collatz<{Some(N)}> {}
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//~^ ERROR the const parameter
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struct Foo;
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impl<const N: usize> Foo {}
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//~^ ERROR the const parameter
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fn main() {}
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