angular-cn/modules/angular2/src/change_detection/exceptions.js

import {ProtoRecord} from './proto_change_detector';

export class ExpressionChangedAfterItHasBeenChecked extends Error {
  message:string;

  constructor(proto:ProtoRecord, change:any) {
    super();
    this.message = `Expression '${proto.expressionAsString}' has changed after it was checked. ` +
    `Previous value: '${change.previousValue}'. Current value: '${change.currentValue}'`;
  }

  toString():string {
    return this.message;
  }
}

export class ChangeDetectionError extends Error {
  message:string;
  originalException:any;
  location:string;

  constructor(proto:ProtoRecord, originalException:any) {
    super();
    this.originalException = originalException;
    this.location = proto.expressionAsString;
    this.message = `${this.originalException} in [${this.location}]`;
  }

  toString():string {
    return this.message;
  }
}