| LL| |#![feature(coverage_attribute)] | |
| LL| |//@ edition: 2021 | |
| LL| |//@ compile-flags: -Zcoverage-options=branch | |
| LL| |//@ llvm-cov-flags: --show-branches=count | |
| LL| | | |
| LL| |macro_rules! no_merge { | |
| LL| | () => { | |
| LL| | for _ in 0..1 {} | |
| LL| | }; | |
| LL| |} | |
| LL| | | |
| LL| 4|fn branch_match_guard(x: Option<u32>) { | |
| LL| 4| no_merge!(); | |
| LL| | | |
| LL| 1| match x { | |
| LL| 1| Some(0) => { | |
| LL| 1| println!("zero"); | |
| LL| 1| } | |
| LL| 3| Some(x) if x % 2 == 0 => { | |
| ^2 | |
| ------------------ | |
| | Branch (LL:20): [True: 2, False: 1] | |
| ------------------ | |
| LL| 2| println!("is nonzero and even"); | |
| LL| 2| } | |
| LL| 1| Some(x) if x % 3 == 0 => { | |
| ------------------ | |
| | Branch (LL:20): [True: 1, False: 0] | |
| ------------------ | |
| LL| 1| println!("is nonzero and odd, but divisible by 3"); | |
| LL| 1| } | |
| LL| 0| _ => { | |
| LL| 0| println!("something else"); | |
| LL| 0| } | |
| LL| | } | |
| LL| 4|} | |
| LL| | | |
| LL| |#[coverage(off)] | |
| LL| |fn main() { | |
| LL| | branch_match_guard(Some(0)); | |
| LL| | branch_match_guard(Some(2)); | |
| LL| | branch_match_guard(Some(6)); | |
| LL| | branch_match_guard(Some(3)); | |
| LL| |} | |