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Add another test for const parameter (non) hygiene.
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matthewjasper committed Jul 29, 2019
1 parent 8876b3b commit 0fb9295
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32 changes: 32 additions & 0 deletions src/test/ui/hygiene/issue-61574-const-parameters.rs
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// A more comprehensive test that const parameters have correctly implemented
// hygiene

// check-pass

#![feature(const_generics)]

use std::ops::Add;

struct VectorLike<T, const SIZE: usize>([T; {SIZE}]);

macro_rules! impl_operator_overload {
($trait_ident:ident, $method_ident:ident) => {

impl<T, const SIZE: usize> $trait_ident for VectorLike<T, {SIZE}>
where
T: $trait_ident,
{
type Output = VectorLike<T, {SIZE}>;

fn $method_ident(self, _: VectorLike<T, {SIZE}>) -> VectorLike<T, {SIZE}> {
let _ = SIZE;
unimplemented!()
}
}

}
}

impl_operator_overload!(Add, add);

fn main() {}
6 changes: 6 additions & 0 deletions src/test/ui/hygiene/issue-61574-const-parameters.stderr
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warning: the feature `const_generics` is incomplete and may cause the compiler to crash
--> $DIR/issue-61574-const-parameters.rs:6:12
|
LL | #![feature(const_generics)]
| ^^^^^^^^^^^^^^

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