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|
LL| |#![feature(coverage_attribute, let_chains)]
LL| |//@ edition: 2021
LL| |//@ compile-flags: -Zcoverage-options=branch
LL| |//@ llvm-cov-flags: --show-branches=count
LL| |
LL| |macro_rules! no_merge {
LL| | () => {
LL| | for _ in 0..1 {}
LL| | };
LL| |}
LL| |
LL| 3|fn if_let(input: Option<&str>) {
LL| 3| no_merge!();
LL| |
LL| 3| if let Some(x) = input {
^2
------------------
| Branch (LL:12): [True: 2, False: 1]
------------------
LL| 2| say(x);
LL| 2| } else {
LL| 1| say("none");
LL| 1| }
LL| 3| say("done");
LL| 3|}
LL| |
LL| 15|fn if_let_chain(a: Option<&str>, b: Option<&str>) {
LL| 15| if let Some(x) = a
^12
------------------
| Branch (LL:12): [True: 12, False: 3]
------------------
LL| 12| && let Some(y) = b
^8
------------------
| Branch (LL:16): [True: 8, False: 4]
------------------
LL| 8| {
LL| 8| say(x);
LL| 8| say(y);
LL| 8| } else {
LL| 7| say("not both");
LL| 7| }
LL| 15| say("done");
LL| 15|}
LL| |
LL| |#[coverage(off)]
LL| |fn say(message: &str) {
LL| | core::hint::black_box(message);
LL| |}
LL| |
LL| |#[coverage(off)]
LL| |fn main() {
LL| | if_let(Some("x"));
LL| | if_let(Some("x"));
LL| | if_let(None);
LL| |
LL| | for _ in 0..8 {
LL| | if_let_chain(Some("a"), Some("b"));
LL| | }
LL| | for _ in 0..4 {
LL| | if_let_chain(Some("a"), None);
LL| | }
LL| | for _ in 0..2 {
LL| | if_let_chain(None, Some("b"));
LL| | }
LL| | if_let_chain(None, None);
LL| |}
LL| |
LL| |// FIXME(#124118) Actually instrument if-let and let-chains for branch coverage.
|
