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Version: 3.3

UnaryExpression 一元表达式

1. 结构声明​

class UnaryExpression extends LogicItem {
    argument: LogicItem;
    operator: '!' | 'isNull';
}

2. 节点示例​

(1) 示例​

AST 如下：​

{
    "concept": "UnaryExpression",
    "operator": "!",
    "argument": {
        "concept": "Identifier",
        "namespace": "",
        "name": "condition"
    }
}

(2) 数据查询中的一元表达式​

AST 如下：​

{
    "concept": "UnaryExpression",
    "operator": "isNull",
    "argument": {
        "concept": "Identifier",
        "namespace": "",
        "name": "condition"
    }
}