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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 let_else(value: Option<&str>) {
no_merge!();
let Some(x) = value else {
say("none");
return;
};
say(x);
}
#[coverage(off)]
fn say(message: &str) {
core::hint::black_box(message);
}
#[coverage(off)]
fn main() {
let_else(Some("x"));
let_else(Some("x"));
let_else(None);
}
// FIXME(#124118) Actually instrument let-else for branch coverage.
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