diff options
Diffstat (limited to 'tests/mir-opt/simple_option_map_e2e.rs')
-rw-r--r-- | tests/mir-opt/simple_option_map_e2e.rs | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/tests/mir-opt/simple_option_map_e2e.rs b/tests/mir-opt/simple_option_map_e2e.rs new file mode 100644 index 000000000..2acd2a227 --- /dev/null +++ b/tests/mir-opt/simple_option_map_e2e.rs @@ -0,0 +1,19 @@ +#[inline(always)] +fn map<T, U, F>(slf: Option<T>, f: F) -> Option<U> +where + F: FnOnce(T) -> U, +{ + match slf { + Some(x) => Some(f(x)), + None => None, + } +} + +// EMIT_MIR simple_option_map_e2e.ezmap.PreCodegen.after.mir +pub fn ezmap(x: Option<i32>) -> Option<i32> { + map(x, |n| n + 1) +} + +fn main() { + assert_eq!(None, ezmap(None)); +} |