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Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/drop_forget_copy.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/drop_forget_copy.rs b/src/tools/clippy/tests/ui/drop_forget_copy.rs index 7c7a9ecff..a7276dd59 100644 --- a/src/tools/clippy/tests/ui/drop_forget_copy.rs +++ b/src/tools/clippy/tests/ui/drop_forget_copy.rs @@ -64,3 +64,23 @@ fn main() { let a5 = a1.clone(); forget(a5); } + +#[allow(unused)] +#[allow(clippy::unit_cmp)] +fn issue9482(x: u8) { + fn println_and<T>(t: T) -> T { + println!("foo"); + t + } + + match x { + 0 => drop(println_and(12)), // Don't lint (copy type), we only care about side-effects + 1 => drop(println_and(String::new())), // Don't lint (no copy type), we only care about side-effects + 2 => { + drop(println_and(13)); // Lint, even if we only care about the side-effect, it's already in a block + }, + 3 if drop(println_and(14)) == () => (), // Lint, idiomatic use is only in body of `Arm` + 4 => drop(2), // Lint, not a fn/method call + _ => (), + } +} |