59 lines
1.0 KiB
Rust
59 lines
1.0 KiB
Rust
#![feature(coverage_attribute, let_chains)]
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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 if_let(input: Option<&str>) {
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no_merge!();
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if let Some(x) = input {
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say(x);
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} else {
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say("none");
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}
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say("done");
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}
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fn if_let_chain(a: Option<&str>, b: Option<&str>) {
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if let Some(x) = a
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&& let Some(y) = b
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{
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say(x);
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say(y);
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} else {
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say("not both");
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}
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say("done");
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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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if_let(Some("x"));
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if_let(Some("x"));
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if_let(None);
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for _ in 0..8 {
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if_let_chain(Some("a"), Some("b"));
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}
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for _ in 0..4 {
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if_let_chain(Some("a"), None);
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}
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for _ in 0..2 {
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if_let_chain(None, Some("b"));
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}
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if_let_chain(None, None);
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}
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// FIXME(#124118) Actually instrument if-let and let-chains for branch coverage.
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