angular-docs-cn/packages/core/src/render3/node_assert.ts

/**
 * @license
 * Copyright Google LLC 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
 */

import {assertDefined, throwError} from '../util/assert';
import {TNode, TNodeType, toTNodeTypeAsString} from './interfaces/node';

export function assertTNodeType(
    tNode: TNode|null, expectedTypes: TNodeType, message?: string): void {
  assertDefined(tNode, 'should be called with a TNode');
  if ((tNode.type & expectedTypes) === 0) {
    throwError(
        message ||
        `Expected [${toTNodeTypeAsString(expectedTypes)}] but got ${
            toTNodeTypeAsString(tNode.type)}.`);
  }
}

export function assertPureTNodeType(type: TNodeType) {
  if (!(type === TNodeType.Element ||           //
        type === TNodeType.Text ||              //
        type === TNodeType.Container ||         //
        type === TNodeType.ElementContainer ||  //
        type === TNodeType.Icu ||               //
        type === TNodeType.Projection ||        //
        type === TNodeType.Placeholder)) {
    throwError(`Expected TNodeType to have only a single type selected, but got ${
        toTNodeTypeAsString(type)}.`);
  }
}