jackfirth / resyntax / #571

97%

master: 97%

Pull #839

cover

Add null-when-guard-to-match-pattern rule

Fold a `#:when (null? xs)` / `#:when (empty? xs)` guard on a match clause
whose pattern ends in a trailing ellipsis variable `xs ...` directly into
the pattern by dropping the variable, turning e.g. `[(list 'array elems ...)
#:when (null? elems) body]` into `[(list 'array) body]`. Only applies when
the trailing variable isn't used in the clause body.

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

131 of 131 new or added lines in 2 files covered. (100.0%)

17619 of 18237 relevant lines covered (96.61%)

0.97 hits per line