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Diffstat (limited to 'src/test/ui/consts/const_forget.rs')
-rw-r--r-- | src/test/ui/consts/const_forget.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/consts/const_forget.rs b/src/test/ui/consts/const_forget.rs new file mode 100644 index 000000000..ec7dde8c9 --- /dev/null +++ b/src/test/ui/consts/const_forget.rs @@ -0,0 +1,20 @@ +// check-pass + +use std::mem::forget; + +const _: () = forget(0i32); +const _: () = forget(Vec::<Vec<Box<i32>>>::new()); + +// Writing this function signature without const-forget +// triggers compiler errors: +// 1) That we use a non-const fn inside a const fn +// 2) without the forget, it complains about the destructor of Box +// +// FIXME: this method cannot be called in const-eval yet, as Box isn't +// const constructable +#[allow(unused)] +const fn const_forget_box<T: ?Sized>(b: Box<T>) { + forget(b); +} + +fn main() {} |