63 lines
2.2 KiB
JavaScript
63 lines
2.2 KiB
JavaScript
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var __classPrivateFieldGet = (this && this.__classPrivateFieldGet) || function (receiver, state, kind, f) {
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if (kind === "a" && !f) throw new TypeError("Private accessor was defined without a getter");
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if (typeof state === "function" ? receiver !== state || !f : !state.has(receiver)) throw new TypeError("Cannot read private member from an object whose class did not declare it");
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return kind === "m" ? f : kind === "a" ? f.call(receiver) : f ? f.value : state.get(receiver);
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};
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var _Visitor_instances, _Visitor_getNode;
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import * as Nodes from './nodes/index.js';
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export default class Visitor {
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constructor() {
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_Visitor_instances.add(this);
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this.scope = new Map();
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this.listeners = {};
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this.ast = [];
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}
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setAST(ast) {
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this.ast = ast;
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}
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run() {
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let result;
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for (const node of this.ast) {
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result = this.visitNode(node);
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}
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return result;
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}
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/**
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* Visits a given node and executes it.
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*/
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visitNode(node) {
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if (!node)
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return null;
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const target_node = __classPrivateFieldGet(this, _Visitor_instances, "m", _Visitor_getNode).call(this, node.type);
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if (target_node) {
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const instance = new target_node(node, this);
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return instance.run();
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}
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}
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/**
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* Gets the name of a node.
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* @param node - The target node.
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*/
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getName(node) {
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if (node.type === 'Identifier')
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return node.name;
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else if (node.type === 'Literal')
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return node.value;
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}
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/**
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* Listens for node calls. Can be used to override default behavior or add new functionality.
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* @param node_name - The node to listen for.
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* @param listener - The callback function.
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*/
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on(node_name, listener) {
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this.listeners[node_name] = listener;
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}
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}
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_Visitor_instances = new WeakSet(), _Visitor_getNode = function _Visitor_getNode(type) {
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const node = Nodes[type];
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if (!node) {
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console.warn('[JINTER]:', `JavaScript node "${type}" not implemented!\nIf this is causing unexpected behavior, please report it at https://github.com/LuanRT/Jinter/issues/new`);
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}
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return node;
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};
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