conflict between infix and prefix ops in `Text.Parser.Expr`
Open
- Dominant language
- Haskell
- Stars
- 892
- Forks
- 99
- PR merge metrics
- No merged PRs in 30d
Description
The function `buildExpressionParser` in module `Text.Parser.Expr` has a bug.
In the uncommon case where a prefix operator has lower precedence than an infix operator, such as in boolean expressions, _e.g_
- `&&` is an infix operator.
- `!` is a prefix operator of lower precedence.
The input `!a && b` is correctly parsed `Not (And a b)`, but the parser fails to parse `a && !b` (as `And a (Not b)`).
Contributor guide
No contributing guide indexed for this repository
Assessment
This issue has not been assessed yet.