UnaryExpression 一元表达式

1. 结构声明

TS Declaration

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

JSON Schema

{
    "type": "object",
    "properties": {
        "composedBy": {
            "type": "array",
            "items": {
                "type": "string"
            }
        },
        "label": {
            "type": "string"
        },
        "description": {
            "type": "string"
        },
        "folded": {
            "type": "boolean"
        },
        "offsetX": {
            "type": "number"
        },
        "offsetY": {
            "type": "number"
        },
        "typeAnnotation": {
            "$ref": "#/definitions/TypeAnnotation"
        },
        "argument": {
            "$ref": "#/definitions/LogicItem"
        },
        "operator": {
            "type": "string",
            "enum": [
                "!",
                "isNull"
            ]
        }
    },
    "required": [
        "argument",
        "operator"
    ],
    "additionalProperties": false
}

2. 节点示例

(1) 示例

AST 如下：

JSON

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

YAML

concept: UnaryExpression
operator: "!"
argument:
  concept: Identifier
  namespace: ""
  name: condition

对应的代码如下：

文本化 NASL

!condition

Natural TS

!(condition)

(2) 数据查询中的一元表达式

AST 如下：

JSON

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

YAML

concept: UnaryExpression
operator: isNull
argument:
  concept: Identifier
  namespace: ""
  name: condition

对应的代码如下：

文本化 NASL

(condition) === null

Natural TS

((condition) === null)