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