Method _check

ci/lint_cpp/test_optimized_checkers.py:136–141

(
        self, content: str, path: str = "src/fl/test.h"
    )

    """Verify pre-compiled regex detects non-standard member naming."""

    def _check(
        self, content: str, path: str = "src/fl/test.h"
    ) -> list[tuple[int, str]]:
        checker = MemberStyleChecker()
        checker.check_file_content(_make(content, path))
        return checker.violations.get(path, [])

    # --- Trailing underscore (Google style) ---