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