expression-evaluation/dst/node/ProgramNode.js

Expression Evaluation

import { Node } from '../Node.js';
import { ConstantNode } from './ConstantNode.js';
import { typeUnknown } from '../Type.js';
export class ProgramNode extends Node {
    _subnodes;
    constructor(frame, _subnodes) {
        super(frame);
        this._subnodes = _subnodes;
    }
    get type() {
        return this._subnodes[this._subnodes.length - 1].type;
    }
    compile(type) {
        let constant = true;
        for (let i = 0, last = this._subnodes.length - 1; i < this._subnodes.length; ++i) {
            this._subnodes[i] = this._subnodes[i].compile(i < last ? typeUnknown : type);
            constant &&= this._subnodes[i].constant;
        }
        return constant ? new ConstantNode(this, this.evaluate()) : this;
    }
    evaluate() {
        return this._subnodes.map((s) => s.evaluate())[this._subnodes.length - 1];
    }
    toString(ident = 0) {
        return `${super.toString(ident)} program node`
            + `, subnodes:\n${this._subnodes.map((s) => s.toString(ident + 1)).join('\n')}`;
    }
}