diff options
Diffstat (limited to 'src/test/ui/const-generics/generic_const_exprs/elaborate-trait-pred.rs')
-rw-r--r-- | src/test/ui/const-generics/generic_const_exprs/elaborate-trait-pred.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/elaborate-trait-pred.rs b/src/test/ui/const-generics/generic_const_exprs/elaborate-trait-pred.rs new file mode 100644 index 000000000..e4111157e --- /dev/null +++ b/src/test/ui/const-generics/generic_const_exprs/elaborate-trait-pred.rs @@ -0,0 +1,24 @@ +// run-pass +// Test that we use the elaborated predicates from traits +// to satisfy const evaluatable predicates. +#![feature(generic_const_exprs)] +#![allow(incomplete_features)] +use std::mem::size_of; + +trait Foo: Sized +where + [(); size_of::<Self>()]: Sized, +{ +} + +impl Foo for u64 {} +impl Foo for u32 {} + +fn foo<T: Foo>() -> [u8; size_of::<T>()] { + [0; size_of::<T>()] +} + +fn main() { + assert_eq!(foo::<u32>(), [0; 4]); + assert_eq!(foo::<u64>(), [0; 8]); +} |