diff options
Diffstat (limited to 'tests/ui/generator/resume-arg-size.rs')
-rw-r--r-- | tests/ui/generator/resume-arg-size.rs | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/tests/ui/generator/resume-arg-size.rs b/tests/ui/generator/resume-arg-size.rs new file mode 100644 index 000000000..b93dc54f7 --- /dev/null +++ b/tests/ui/generator/resume-arg-size.rs @@ -0,0 +1,28 @@ +#![feature(generators)] + +// run-pass + +use std::mem::size_of_val; + +fn main() { + // Generator taking a `Copy`able resume arg. + let gen_copy = |mut x: usize| { + loop { + drop(x); + x = yield; + } + }; + + // Generator taking a non-`Copy` resume arg. + let gen_move = |mut x: Box<usize>| { + loop { + drop(x); + x = yield; + } + }; + + // Neither of these generators have the resume arg live across the `yield`, so they should be + // 1 Byte in size (only storing the discriminant) + assert_eq!(size_of_val(&gen_copy), 1); + assert_eq!(size_of_val(&gen_move), 1); +} |