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Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/undropped_manually_drops.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/undropped_manually_drops.rs b/src/tools/clippy/tests/ui/undropped_manually_drops.rs new file mode 100644 index 000000000..f4cfc92e1 --- /dev/null +++ b/src/tools/clippy/tests/ui/undropped_manually_drops.rs @@ -0,0 +1,26 @@ +#![warn(clippy::undropped_manually_drops)] + +struct S; + +fn main() { + let f = std::mem::drop; + let g = std::mem::ManuallyDrop::drop; + let mut manual1 = std::mem::ManuallyDrop::new(S); + let mut manual2 = std::mem::ManuallyDrop::new(S); + let mut manual3 = std::mem::ManuallyDrop::new(S); + let mut manual4 = std::mem::ManuallyDrop::new(S); + + // These lines will not drop `S` and should be linted + drop(std::mem::ManuallyDrop::new(S)); + drop(manual1); + + // FIXME: this line is not linted, though it should be + f(manual2); + + // These lines will drop `S` and should be okay. + unsafe { + std::mem::ManuallyDrop::drop(&mut std::mem::ManuallyDrop::new(S)); + std::mem::ManuallyDrop::drop(&mut manual3); + g(&mut manual4); + } +} |