feat(lang): added "context" to BaseException

Author: vsavkin

modules/angular2/src/core/application.ts

@@ -145,6 +145,11 @@ function _createNgZone(givenReporter: Function): NgZone {
  var defaultErrorReporter = (exception, stackTrace) => {
  var longStackTrace = ListWrapper.join(stackTrace, "\n\n-----async gap-----\n");
  DOM.logError(`${exception}\n\n${longStackTrace}`);
+
+ if (exception instanceof BaseException && isPresent(exception.context)) {
+ print("Error Context:");
+ print(exception.context);
+ }
  throw exception;
  };
 

modules/angular2/src/facade/lang.dart

@@ -183,11 +183,12 @@ class FunctionWrapper {
 }
 
 class BaseException extends Error {
+ final dynamic context;
  final String message;
  final originalException;
  final originalStack;
 
- BaseException([this.message, this.originalException, this.originalStack]);
+ BaseException([this.message, this.originalException, this.originalStack, this.context]);
 
  String toString() {
  return this.message;
@@ -225,7 +226,7 @@ bool isJsObject(o) {
 
 var _assertionsEnabled = null;
 bool assertionsEnabled() {
- if (_assertionsEnabled == null) { 
+ if (_assertionsEnabled == null) {
  try {
  assert(false);
  _assertionsEnabled = false;

modules/angular2/src/facade/lang.ts

@@ -11,11 +11,18 @@ export function getTypeNameForDebugging(type: Type): string {
 
 export class BaseException extends Error {
  stack;
- constructor(public message?: string, public originalException?, public originalStack?) {
+ constructor(public message?: string, private _originalException?, private _originalStack?,
+ private _context?) {
  super(message);
  this.stack = (<any>new Error(message)).stack;
  }
 
+ get originalException(): any { return this._originalException; }
+
+ get originalStack(): any { return this._originalStack; }
+
+ get context(): any { return this._context; }
+
  toString(): string { return this.message; }
 }
 
@@ -118,7 +125,9 @@ export function stringify(token): string {
  return token.name;
  }
 
- return token.toString();
+ var res = token.toString();
+ var newLineIndex = res.indexOf("\n");
+ return (newLineIndex === -1) ? res : res.substring(0, newLineIndex);
 }
 
 export class StringWrapper {