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Rollup merge of #78478 - hameerabbasi:const-generics-supertraits, r=lcnr
Add const generics tests for supertraits + dyn traits. Partially addresses #78433
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// run-pass | ||
// revisions: full min | ||
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#![cfg_attr(full, feature(const_generics))] | ||
#![cfg_attr(full, allow(incomplete_features))] | ||
#![cfg_attr(min, feature(min_const_generics))] | ||
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trait Foo<const N: usize> { | ||
fn myfun(&self) -> usize; | ||
} | ||
trait Bar<const N: usize> : Foo<N> {} | ||
trait Baz: Foo<3> {} | ||
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struct FooType<const N: usize>; | ||
struct BarType<const N: usize>; | ||
struct BazType; | ||
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impl<const N: usize> Foo<N> for FooType<N> { | ||
fn myfun(&self) -> usize { N } | ||
} | ||
impl<const N: usize> Foo<N> for BarType<N> { | ||
fn myfun(&self) -> usize { N + 1 } | ||
} | ||
impl<const N: usize> Bar<N> for BarType<N> {} | ||
impl Foo<3> for BazType { | ||
fn myfun(&self) -> usize { 999 } | ||
} | ||
impl Baz for BazType {} | ||
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trait Foz {} | ||
trait Boz: Foo<3> + Foz {} | ||
trait Bok<const N: usize>: Foo<N> + Foz {} | ||
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struct FozType; | ||
struct BozType; | ||
struct BokType<const N: usize>; | ||
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impl Foz for FozType {} | ||
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impl Foz for BozType {} | ||
impl Foo<3> for BozType { | ||
fn myfun(&self) -> usize { 9999 } | ||
} | ||
impl Boz for BozType {} | ||
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impl<const N: usize> Foz for BokType<N> {} | ||
impl<const N: usize> Foo<N> for BokType<N> { | ||
fn myfun(&self) -> usize { N + 2 } | ||
} | ||
impl<const N: usize> Bok<N> for BokType<N> {} | ||
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fn a<const N: usize>(x: &dyn Foo<N>) -> usize { x.myfun() } | ||
fn b(x: &dyn Foo<3>) -> usize { x.myfun() } | ||
fn c<T: Bok<N>, const N: usize>(x: T) -> usize { a::<N>(&x) } | ||
fn d<T: ?Sized + Foo<3>>(x: &T) -> usize { x.myfun() } | ||
fn e(x: &dyn Bar<3>) -> usize { d(x) } | ||
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fn main() { | ||
let foo = FooType::<3> {}; | ||
assert!(a(&foo) == 3); | ||
assert!(b(&foo) == 3); | ||
assert!(d(&foo) == 3); | ||
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let bar = BarType::<3> {}; | ||
assert!(a(&bar) == 4); | ||
assert!(b(&bar) == 4); | ||
assert!(d(&bar) == 4); | ||
assert!(e(&bar) == 4); | ||
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let baz = BazType {}; | ||
assert!(a(&baz) == 999); | ||
assert!(b(&baz) == 999); | ||
assert!(d(&baz) == 999); | ||
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let boz = BozType {}; | ||
assert!(a(&boz) == 9999); | ||
assert!(b(&boz) == 9999); | ||
assert!(d(&boz) == 9999); | ||
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let bok = BokType::<3> {}; | ||
assert!(a(&bok) == 5); | ||
assert!(b(&bok) == 5); | ||
assert!(d(&bok) == 5); | ||
assert!(c(BokType::<3> {}) == 5); | ||
} |