9. Value-Free Operators Rule Lines; Discarding Trivia in Example Grammars (936857C)

• An Operators Rule operator line with an action never uses the line's value ($op is built from the matched range and $n is not allowed there), and neither does an operand line whose action does not use $n. Such lines are now compiled without values (closure leanLine; bytecode uses the same predicate).
• The example grammars captured repetitions such as rest:(ws "," ws m:member)*. A captured value keeps its whole CST (it can be inspected with .children or text), so every whitespace character became a Match node. They now discard trivia with -ws (see the authoring guideline below). The resulting ASTs are identical.
• Effect: JSON 50.5 → 42.8 MB, minilang 32.8 → 23.0 MB per parse.