expr_inferrer.py 文件源码

def _infer_bitwise(left_type, right_type, op, lineno, solver):
    """Infer the type of a bitwise operation, and add the corresponding axioms"""
    result_type = solver.new_z3_const("bitwise_result")

    magic_method = ""
    if isinstance(op, ast.BitOr):
        magic_method = "__or__"
    elif isinstance(op, ast.BitXor):
        magic_method = "__xor__"
    elif isinstance(op, ast.BitAnd):
        magic_method = "__and__"

    solver.add(axioms.bitwise(left_type, right_type, result_type, magic_method, solver.z3_types),
               fail_message="Bitwise operation in line {}".format(lineno))
    return result_type