jintr/dist/nodes/ForOfStatement.js

A tiny JavaScript interpreter written in TypeScript.

import BaseJSNode from './BaseJSNode.js';
export default class ForOfStatement extends BaseJSNode {
    run() {
        this.visitor.visitNode(this.node.left);
        const right_node = this.visitor.visitNode(this.node.right);
        for (const el of right_node) {
            if (this.node.left.type === 'VariableDeclaration' && this.node.left.declarations[0].id.type === 'Identifier') {
                this.visitor.scope.set(this.node.left.declarations[0].id.name, el);
            }
            else if (this.node.left.type === 'VariableDeclaration' && this.node.left.declarations[0].id.type === 'ObjectPattern') {
                for (const propert of this.node.left.declarations[0].id.properties) {
                    if (propert.type === 'Property' && (propert.value.type === 'Identifier' && propert.key.type === 'Identifier')) {
                        this.visitor.scope.set(propert.value.name, el[propert.key.name]);
                    }
                }
            }
            const body = this.visitor.visitNode(this.node.body);
            if (body === '$jintr_break_') {
                break;
            }
            if (body === '$jintr_continue_') {
                continue;
            }
            if (body && this.node.body.type !== 'ExpressionStatement') {
                return body;
            }
        }
    }
}