ast-utils.js

"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
/**
 * @license
 * Copyright Google Inc. All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
const ts = require("typescript");
// Find all nodes from the AST in the subtree of node of SyntaxKind kind.
function collectDeepNodes(node, kind) {
    const nodes = [];
    const helper = (child) => {
        if (child.kind === kind) {
            nodes.push(child);
        }
        ts.forEachChild(child, helper);
    };
    ts.forEachChild(node, helper);
    return nodes;
}
exports.collectDeepNodes = collectDeepNodes;
function drilldownNodes(startingNode, path) {
    let currentNode = startingNode;
    for (const segment of path) {
        if (segment.prop) {
            // ts.Node has no index signature, so we need to cast it as any.
            // tslint:disable-next-line:no-any
            currentNode = currentNode[segment.prop];
        }
        if (!currentNode || currentNode.kind !== segment.kind) {
            return null;
        }
    }
    return currentNode;
}
exports.drilldownNodes = drilldownNodes;
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