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| -rw-r--r-- | src/tools/clippy/src/docs/iter_next_loop.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/iter_next_loop.txt b/src/tools/clippy/src/docs/iter_next_loop.txt new file mode 100644 index 000000000..b33eb39d6 --- /dev/null +++ b/src/tools/clippy/src/docs/iter_next_loop.txt @@ -0,0 +1,17 @@ +### What it does +Checks for loops on `x.next()`. + +### Why is this bad? +`next()` returns either `Some(value)` if there was a +value, or `None` otherwise. The insidious thing is that `Option<_>` +implements `IntoIterator`, so that possibly one value will be iterated, +leading to some hard to find bugs. No one will want to write such code +[except to win an Underhanded Rust +Contest](https://www.reddit.com/r/rust/comments/3hb0wm/underhanded_rust_contest/cu5yuhr). + +### Example +``` +for x in y.next() { + .. +} +```
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