Function _parse_group_argument

scripts/lint_note.py:1117–1132

(expr: str, start: int)

def _parse_group_argument(expr: str, start: int) -> int | None:
    idx = start
    while idx < len(expr) and expr[idx].isspace():
        idx += 1
    if idx >= len(expr) or expr[idx] != "{":
        return None
    depth = 0
    while idx < len(expr):
        if expr[idx] == "{":
            depth += 1
        elif expr[idx] == "}":
            depth -= 1
            if depth == 0:
                return idx + 1
        idx += 1
    return None


def _has_invalid_frac_arguments(expr: str) -> bool: