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Diffstat (limited to 'src/tools/clippy/src/docs/precedence.txt')
| -rw-r--r-- | src/tools/clippy/src/docs/precedence.txt | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/src/tools/clippy/src/docs/precedence.txt b/src/tools/clippy/src/docs/precedence.txt new file mode 100644 index 000000000..fda0b831f --- /dev/null +++ b/src/tools/clippy/src/docs/precedence.txt @@ -0,0 +1,17 @@ +### What it does +Checks for operations where precedence may be unclear +and suggests to add parentheses. Currently it catches the following: +* mixed usage of arithmetic and bit shifting/combining operators without +parentheses +* a "negative" numeric literal (which is really a unary `-` followed by a +numeric literal) + followed by a method call + +### Why is this bad? +Not everyone knows the precedence of those operators by +heart, so expressions like these may trip others trying to reason about the +code. + +### Example +* `1 << 2 + 3` equals 32, while `(1 << 2) + 3` equals 7 +* `-1i32.abs()` equals -1, while `(-1i32).abs()` equals 1
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