angular-docs-cn/modules/@angular/compiler/src/interpolation_config.ts

/**
 * @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
 */

import {assertInterpolationSymbols} from './assertions';
import {isBlank} from './facade/lang';

export class InterpolationConfig {
  static fromArray(markers: [string, string]): InterpolationConfig {
    if (isBlank(markers)) {
      // TODO:bad ??
      return DEFAULT_INTERPOLATION_CONFIG;
    }

    assertInterpolationSymbols('interpolation', markers);
    return new InterpolationConfig(markers[0], markers[1]);
  }

  constructor(public start: string, public end: string){};
}

export const DEFAULT_INTERPOLATION_CONFIG: InterpolationConfig =
    new InterpolationConfig('{{', '}}');