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