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Diffstat (limited to 'src/tools/clippy/src/docs/vec_init_then_push.txt')
-rw-r--r-- | src/tools/clippy/src/docs/vec_init_then_push.txt | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/vec_init_then_push.txt b/src/tools/clippy/src/docs/vec_init_then_push.txt new file mode 100644 index 000000000..445f28747 --- /dev/null +++ b/src/tools/clippy/src/docs/vec_init_then_push.txt @@ -0,0 +1,23 @@ +### What it does +Checks for calls to `push` immediately after creating a new `Vec`. + +If the `Vec` is created using `with_capacity` this will only lint if the capacity is a +constant and the number of pushes is greater than or equal to the initial capacity. + +If the `Vec` is extended after the initial sequence of pushes and it was default initialized +then this will only lint after there were at least four pushes. This number may change in +the future. + +### Why is this bad? +The `vec![]` macro is both more performant and easier to read than +multiple `push` calls. + +### Example +``` +let mut v = Vec::new(); +v.push(0); +``` +Use instead: +``` +let v = vec![0]; +```
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