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Diffstat (limited to '')
-rw-r--r-- | src/tools/clippy/tests/ui/mem_replace_macro.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/mem_replace_macro.rs b/src/tools/clippy/tests/ui/mem_replace_macro.rs new file mode 100644 index 000000000..0c09344b8 --- /dev/null +++ b/src/tools/clippy/tests/ui/mem_replace_macro.rs @@ -0,0 +1,21 @@ +// aux-build:macro_rules.rs +#![warn(clippy::mem_replace_with_default)] + +#[macro_use] +extern crate macro_rules; + +macro_rules! take { + ($s:expr) => { + std::mem::replace($s, Default::default()) + }; +} + +fn replace_with_default() { + let s = &mut String::from("foo"); + take!(s); + take_external!(s); +} + +fn main() { + replace_with_default(); +} |