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