pyslc.py 文件源码

def TO_INT(node: ast) -> (bool, int):
    if isinstance(node, ast.Num):
        return (True, node.n)
    if isinstance(node, ast.UnaryOp) and isinstance(node.operand, ast.Num):
        if isinstance(node.op, ast.UAdd):
            return (True, +node.operand.n)
        if isinstance(node.op, ast.USub):
            return (True, -node.operand.n)
        error(loc(node), "Expected +/- Num")
        return (False, 0)
    error(loc(node), "Expected signed integer")
    return (False, 0)