Function check_syntax

core/linter.py:40–51

Check Python syntax using ast.parse. Returns a human-readable error string on failure, None if valid.

(content: str, filename: str = "<string>")

# ── Syntax check (free, no external tools) ────────────────────────────────────

def check_syntax(content: str, filename: str = "<string>") -> Optional[str]:
    """
    Check Python syntax using ast.parse.
    Returns a human-readable error string on failure, None if valid.
    """
    try:
        ast.parse(content, filename=filename)
        return None
    except SyntaxError as e:
        return f"SyntaxError at line {e.lineno}: {e.msg}"
    except Exception as e:
        return f"Parse error: {e}"


# ── Output parsers ─────────────────────────────────────────────────────────────