diff options
Diffstat (limited to 'src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed')
-rw-r--r-- | src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed new file mode 100644 index 000000000..2afe2f433 --- /dev/null +++ b/src/tools/clippy/tests/ui/repeat_vec_with_capacity.fixed @@ -0,0 +1,38 @@ +#![warn(clippy::repeat_vec_with_capacity)] + +fn main() { + { + (0..123).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + let n = 123; + (0..n).map(|_| Vec::<()>::with_capacity(42)).collect::<Vec<_>>(); + //~^ ERROR: repeating `Vec::with_capacity` using `vec![x; n]`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + vec![$x; 123]; + }; + } + // vec expansion is from another macro, don't lint + from_macro!(Vec::<()>::with_capacity(42)); + } + + { + std::iter::repeat_with(|| Vec::<()>::with_capacity(42)); + //~^ ERROR: repeating `Vec::with_capacity` using `iter::repeat`, which does not retain capacity + } + + { + macro_rules! from_macro { + ($x:expr) => { + std::iter::repeat($x) + }; + } + from_macro!(Vec::<()>::with_capacity(42)); + } +} |