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Diffstat (limited to 'src/tools/clippy/src/docs/needless_collect.txt')
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1 files changed, 14 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/needless_collect.txt b/src/tools/clippy/src/docs/needless_collect.txt new file mode 100644 index 000000000..275c39afc --- /dev/null +++ b/src/tools/clippy/src/docs/needless_collect.txt @@ -0,0 +1,14 @@ +### What it does +Checks for functions collecting an iterator when collect +is not needed. + +### Why is this bad? +`collect` causes the allocation of a new data structure, +when this allocation may not be needed. + +### Example +``` +let len = iterator.clone().collect::<Vec<_>>().len(); +// should be +let len = iterator.count(); +```
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