50 lines
1.5 KiB
Plaintext
50 lines
1.5 KiB
Plaintext
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LL| |#![feature(coverage_attribute)]
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LL| |//@ edition: 2021
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LL| |//@ compile-flags: -Zcoverage-options=branch
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LL| |//@ llvm-cov-flags: --show-branches=count
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LL| |
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LL| |// When instrumenting match expressions for branch coverage, make sure we don't
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LL| |// cause an ICE or produce weird coverage output for matches with <2 arms.
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LL| |
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LL| |// Helper macro to prevent start-of-function spans from being merged into
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LL| |// spans on the lines we care about.
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LL| |macro_rules! no_merge {
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LL| | () => {
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LL| | for _ in 0..1 {}
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LL| | };
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LL| |}
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LL| |
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LL| |enum Uninhabited {}
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LL| |enum Trivial {
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LL| | Value,
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LL| |}
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LL| |
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LL| 0|fn _uninhabited(x: Uninhabited) {
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LL| 0| no_merge!();
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LL| |
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LL| | match x {}
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LL| |
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LL| | consume("done");
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LL| |}
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LL| |
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LL| 1|fn trivial(x: Trivial) {
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LL| 1| no_merge!();
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LL| |
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LL| 1| match x {
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LL| 1| Trivial::Value => consume("trivial"),
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LL| 1| }
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LL| 1|
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LL| 1| consume("done");
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LL| 1|}
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LL| |
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LL| |#[coverage(off)]
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LL| |fn consume<T>(x: T) {
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LL| | core::hint::black_box(x);
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LL| |}
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LL| |
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LL| |#[coverage(off)]
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LL| |fn main() {
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LL| | trivial(Trivial::Value);
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LL| |}
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