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