agsamantha/node_modules/jintr/dist/nodes/UnaryExpression.js

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2024-10-02 15:15:21 -05:00
import BaseJSNode from './BaseJSNode.js';
export default class UnaryExpression extends BaseJSNode {
run() {
const operator = this.node.operator;
switch (operator) {
case '-': {
const arg = this.visitor.visitNode(this.node.argument);
return -arg;
}
case '+': {
const arg = this.visitor.visitNode(this.node.argument);
return +arg;
}
case '!': {
const arg = this.visitor.visitNode(this.node.argument);
return !arg;
}
case '~': {
const arg = this.visitor.visitNode(this.node.argument);
return ~arg;
}
case 'void': {
this.visitor.visitNode(this.node.argument);
return undefined;
}
case 'typeof': {
const arg = this.visitor.visitNode(this.node.argument);
return typeof arg;
}
case 'delete': {
if (this.node.argument.type === 'MemberExpression') {
const obj = this.visitor.visitNode(this.node.argument.object);
const prop = this.node.argument.computed ? this.visitor.visitNode(this.node.argument.property) : this.visitor.getName(this.node.argument.property);
return delete obj[prop];
}
else if (this.node.argument.type === 'Identifier') {
return this.visitor.scope.delete(this.node.argument.name);
}
return true;
}
default:
console.warn('Unhandled UnaryExpression operator', operator);
}
}
}