docs: update the release schedule

This fixes a badly applied revert earlier.

.pullapprove.yml

@@ -25,7 +25,6 @@
 # tinayuangao - Tina Gao
 # vicb - Victor Berchet
 # vikerman - Vikram Subramanian
-# wardbell - Ward Bell
 
 
 version: 2
@@ -312,7 +311,6 @@ groups:
       - juleskremer #primary
       - Foxandxss
       - stephenfluin
-      - wardbell
       - petebacondarwin
       - gkalpak
       - IgorMinar #fallback

CHANGELOG.md

@@ -1,3 +1,20 @@
+<a name="5.2.0-beta.1"></a>
+# [5.2.0-beta.1](https://github.com/angular/angular/compare/5.2.0-beta.0...5.2.0-beta.1) (2017-12-20)
+
+
+### Bug Fixes
+
+* **compiler:** generate the correct imports for summary type-check ([d91ff17](https://github.com/angular/angular/commit/d91ff17))
+* **forms:** avoid producing an error with hostBindingTypeCheck ([d213a20](https://github.com/angular/angular/commit/d213a20))
+
+
+### Features
+
+* **compiler:** allow ngIf to use the ngIf expression directly as a guard ([82bcd83](https://github.com/angular/angular/commit/82bcd83))
+* **router:** add "paramsInheritanceStrategy" router configuration option ([5efea2f](https://github.com/angular/angular/commit/5efea2f)), closes [#20572](https://github.com/angular/angular/issues/20572)
+
+
+
 <a name="5.1.2"></a>
 ## [5.1.2](https://github.com/angular/angular/compare/5.1.1...5.1.2) (2017-12-20)
 
@@ -14,6 +31,20 @@
 
 
 
+<a name="5.2.0-beta.0"></a>
+# [5.2.0-beta.0](https://github.com/angular/angular/compare/5.1.0...5.2.0-beta.0) (2017-12-13)
+
+
+### Features
+
+* **animations:** re-introduce support for transition matching functions ([#20723](https://github.com/angular/angular/issues/20723)) ([590d93b](https://github.com/angular/angular/commit/590d93b)), closes [#18959](https://github.com/angular/angular/issues/18959)
+* **compiler:** add a pseudo $any() function to disable type checking ([#20876](https://github.com/angular/angular/issues/20876)) ([70cd124](https://github.com/angular/angular/commit/70cd124))
+* **compiler:** narrow types of expressions used in *ngIf ([#20702](https://github.com/angular/angular/issues/20702)) ([e7d9cb3](https://github.com/angular/angular/commit/e7d9cb3))
+* **core:** add source to `StaticInjectorError` message ([#20817](https://github.com/angular/angular/issues/20817)) ([b7738e1](https://github.com/angular/angular/commit/b7738e1)), closes [#19302](https://github.com/angular/angular/issues/19302)
+* **forms:** allow nulls on setAsyncValidators ([#20327](https://github.com/angular/angular/issues/20327)) ([d41d2c4](https://github.com/angular/angular/commit/d41d2c4)), closes [#20296](https://github.com/angular/angular/issues/20296)
+
+
+
 <a name="5.1.1"></a>
 ## [5.1.1](https://github.com/angular/angular/compare/5.1.0...5.1.1) (2017-12-13)
 

docs/RELEASE_SCHEDULE.md

@@ -17,7 +17,7 @@ In such case, we'll update this document accordingly.
 
 The dates are just a guidance and might be adjusted slightly if necessary.
 
-## Tentative Schedule Until September 2017
+## Tentative Schedule Until December 2017
 
 <!--
 The table below is formatted so that it's easy to read and edit in both markdown and rendered html form.
@@ -25,43 +25,54 @@ The table below is formatted so that it's easy to read and edit in both markdown
 In order to deal with undesirable line breaks, two special characters are occasionally used:
 
 - non-breaking hyphen: "‑" http://www.fileformat.info/info/unicode/char/2011/index.htm
-- non-breaking space: " " http://www.fileformat.info/info/unicode/char/00a0/index.htm
+- non-breaking space: " " http://www.fileformat.info/info/unicode/char/00a0/index.htm
 
 If you see undesirable wrapping issues in the rendered form, please copy&paste the quoted characters and use them in the table below where needed.
 -->
 
-Week Of       | Stable Release<br>(@latest npm tag) | Beta/RC Release<br>(@next npm tag) | Note
+Week Of       | Stable Release<br>(@latest npm tag) | Beta/RC Release<br>(@next npm tag) | Note
 ------------- | ----------------------------------- | ---------------------------------- | ---------------------
-2017‑05‑01	  | 4.1.1                               | 4.2.0‑beta.0                       |
-2017‑05‑08	  | 4.1.2                               | 4.2.0‑beta.1                       |
-2017‑05‑15	  | 4.1.3                               | 4.2.0‑rc.0                         |
-2017‑05‑26	  | ‑                                   | 4.2.0‑rc.1                         |
-2017‑06‑01    | ‑                                   | 4.2.0‑rc.2                         |
-2017‑06‑05	  | 4.2.0                               | ‑                                  | Minor Version Release
-*2017‑06‑09*  | 4.2.1                               | ‑                                  | *Regression Patch Release*
+2017‑05‑01	  | 4.1.1                               | 4.2.0‑beta.0                       |
+2017‑05‑08	  | 4.1.2                               | 4.2.0‑beta.1                       |
+2017‑05‑15	  | 4.1.3                               | 4.2.0‑rc.0                         |
+2017‑05‑26	  | ‑                                   | 4.2.0‑rc.1                         |
+2017‑06‑01    | ‑                                   | 4.2.0‑rc.2                         |
+2017‑06‑05	  | 4.2.0                               | ‑                                  | Minor Version Release
+*2017‑06‑09*  | 4.2.1                               | ‑                                  | *Regression Patch Release*
 2017-06-12    | 4.2.2                               | ‑                                  |
-*2017-06-16*  | 4.2.3                               | ‑                                  | *Regression Patch Release*
-2017‑06‑19	  | 4.2.4                               | 4.3.0‑beta.0                       |
-2017‑06‑26	  | 4.2.5                               | 4.3.0‑beta.1                       |
-2017‑07‑03	  | 4.2.6                               | 4.3.0‑rc.0                         |
-2017‑07‑10	  | 4.3.0                               | -                                  | Minor Version Release
-2017‑07‑17	  | 4.3.1                               | 5.0.0‑beta.0                       |
-2017‑07‑24	  | 4.3.2                               | 5.0.0‑beta.1                       |
-2017‑07‑31	  | 4.3.3                               | 5.0.0‑beta.2                       |
-2017‑08‑07	  | 4.3.4                               | 5.0.0‑beta.3                       |
-2017‑08‑14    | 4.3.5                               | 5.0.0‑beta.4                       |
-2017‑08‑21	  | 4.3.6                               | -                                  |
-2017‑08‑28	  | -                                   | 5.0.0‑beta.5                       |
-2017‑09‑04	  | -                                   | 5.0.0‑beta.6                       |
-2017‑09‑11	  | 4.4.0                               | 5.0.0-beta.7                       |
-2017‑09‑18	  | 4.4.1                               | 5.0.0‑beta.8                       |
-2017‑09‑25	  | 4.4.2                               | 5.0.0‑rc.0                         |
-2017‑10‑02	  | 4.4.3                               | 5.0.0‑rc.1                         |
-2017‑10‑09	  | 4.4.4                               | 5.0.0‑rc.2                         |
-2017‑10‑16    | 4.4.5                               | 5.0.0‑rc.3                         |
-2017‑10‑23    | 5.0.0                               | ‑                                  | Major Version Release
+*2017-06-16*  | 4.2.3                               | ‑                                  | *Regression Patch Release*
+2017‑06‑19	  | 4.2.4                               | 4.3.0‑beta.0                       |
+2017‑06‑26	  | 4.2.5                               | 4.3.0‑beta.1                       |
+2017‑07‑03	  | 4.2.6                               | 4.3.0‑rc.0                         |
+2017‑07‑10	  | 4.3.0                               | -                                  | Minor Version Release
+2017‑07‑17	  | 4.3.1                               | 5.0.0‑beta.0                       |
+2017‑07‑24	  | 4.3.2                               | 5.0.0‑beta.1                       |
+2017‑07‑31	  | 4.3.3                               | 5.0.0‑beta.2                       |
+2017‑08‑07	  | 4.3.4                               | 5.0.0‑beta.3                       |
+2017‑08‑14    | 4.3.5                               | 5.0.0‑beta.4                       |
+2017‑08‑21	  | 4.3.6                               | -                                  |
+2017‑08‑28	  | -                                   | 5.0.0‑beta.5                       |
+2017‑09‑04	  | -                                   | 5.0.0‑beta.6                       |
+2017‑09‑11	  | 4.4.0                               | 5.0.0-beta.7                       |
+2017‑09‑18	  | 4.4.1                               | 5.0.0‑beta.8                       |
+2017‑09‑25	  | 4.4.2                               | 5.0.0‑rc.0                         |
+2017‑10‑02	  | 4.4.3                               | 5.0.0‑rc.1                         |
+2017‑10‑09	  | 4.4.4                               | 5.0.0‑rc.2                         |
+2017‑10‑16    | 4.4.5                               | 5.0.0‑rc.3                         |
+2017‑11-01    | 5.0.0                               | ‑                                  | Major Version Release
+2017-11-08    | 5.0.1                               | 5.1.0.Beta.0                       | *Regression Patch Release*
+2017-11-16    | 5.0.2                               | 5.1.0.Beta.1                       | *Regression Patch Release*
+2017-11-22    | 5.0.3                               | 5.1.0.beta.2                       | *Regression Patch Release*
+2017-11-30    | 5.0.4                               | 5.1.0.rc.0                         |
+2017-12-01    | 5.0.5                               | 5.1.0.rc.1                         |
+2017-12-06    | 5.1.0                               |                                    | Minor Version Release
+2017-12-13    | 5.1.1                               | 5.2.0.beta.0                       |
+2017-12-20    | 5.1.2                               |                                    |
 
-## Tentative Schedule After September 2017
+
+
+
+## Tentative Schedule After December 2017
 
  Date                   | Stable Release | Compatibility`*`
  ---------------------- | -------------- | ----------------

package.json

@@ -1,6 +1,6 @@
 {
   "name": "angular-srcs",
-  "version": "5.1.2",
+  "version": "5.2.0-beta.1",
   "private": true,
   "branchPattern": "2.0.*",
   "description": "Angular - a web framework for modern web apps",

packages/animations/browser/src/render/transition_animation_engine.ts

@@ -1393,9 +1393,9 @@ export class TransitionAnimationPlayer implements AnimationPlayer {
 
   public markedForDestroy: boolean = false;
 
-  constructor(public namespaceId: string, public triggerName: string, public element: any) {}
+  readonly queued: boolean = true;
 
-  get queued() { return this._containsRealPlayer == false; }
+  constructor(public namespaceId: string, public triggerName: string, public element: any) {}
 
   setRealPlayer(player: AnimationPlayer) {
     if (this._containsRealPlayer) return;
@@ -1407,6 +1407,7 @@ export class TransitionAnimationPlayer implements AnimationPlayer {
     });
     this._queuedCallbacks = {};
     this._containsRealPlayer = true;
+    (this as{queued: boolean}).queued = false;
   }
 
   getRealPlayer() { return this._player; }

packages/animations/src/animation_metadata.ts

@@ -115,7 +115,7 @@ export interface AnimationStateMetadata extends AnimationMetadata {
  * @experimental Animation support is experimental.
  */
 export interface AnimationTransitionMetadata extends AnimationMetadata {
-  expr: string;
+  expr: string|((fromState: string, toState: string) => boolean);
   animation: AnimationMetadata|AnimationMetadata[];
   options: AnimationOptions|null;
 }
@@ -836,7 +836,8 @@ export function keyframes(steps: AnimationStyleMetadata[]): AnimationKeyframesSe
  * @experimental Animation support is experimental.
  */
 export function transition(
-    stateChangeExpr: string, steps: AnimationMetadata | AnimationMetadata[],
+    stateChangeExpr: string | ((fromState: string, toState: string) => boolean),
+    steps: AnimationMetadata | AnimationMetadata[],
     options: AnimationOptions | null = null): AnimationTransitionMetadata {
   return {type: AnimationMetadataType.Transition, expr: stateChangeExpr, animation: steps, options};
 }

packages/common/http/test/jsonp_mock.ts

@@ -23,13 +23,12 @@ export class MockScriptElement {
 
 export class MockDocument {
   mock: MockScriptElement|null;
+  readonly body: any = this;
 
   createElement(tag: 'script'): HTMLScriptElement {
     return new MockScriptElement() as any as HTMLScriptElement;
   }
 
-  get body(): any { return this; }
-
   appendChild(node: any): void { this.mock = node; }
 
   removeNode(node: any): void {
@@ -41,4 +40,4 @@ export class MockDocument {
   mockLoad(): void { this.mock !.listeners.load !(null as any); }
 
   mockError(err: Error) { this.mock !.listeners.error !(err); }
-}
+}

packages/common/src/directives/ng_if.ts

@@ -151,6 +151,9 @@ export class NgIf {
       }
     }
   }
+
+  /** @internal */
+  public static ngIfUseIfTypeGuard: void;
 }
 
 /**

packages/compiler-cli/test/diagnostics/check_types_spec.ts

@@ -48,11 +48,11 @@ describe('ng type checker', () => {
   }
 
   function reject(
-      message: string | RegExp, location: RegExp, files: MockFiles,
+      message: string | RegExp, location: RegExp | null, files: MockFiles,
       overrideOptions: ng.CompilerOptions = {}) {
     const diagnostics = compileAndCheck([QUICKSTART, files], overrideOptions);
     if (!diagnostics || !diagnostics.length) {
-      throw new Error('Expected a diagnostic erorr message');
+      throw new Error('Expected a diagnostic error message');
     } else {
       const matches: (d: ng.Diagnostic) => boolean = typeof message === 'string' ?
           d => ng.isNgDiagnostic(d)&& d.messageText == message :
@@ -63,11 +63,13 @@ describe('ng type checker', () => {
             `Expected a diagnostics matching ${message}, received\n  ${diagnostics.map(d => d.messageText).join('\n  ')}`);
       }
 
-      const span = matchingDiagnostics[0].span;
-      if (!span) {
-        throw new Error('Expected a sourceSpan');
+      if (location) {
+        const span = matchingDiagnostics[0].span;
+        if (!span) {
+          throw new Error('Expected a sourceSpan');
+        }
+        expect(`${span.start.file.url}@${span.start.line}:${span.start.offset}`).toMatch(location);
       }
-      expect(`${span.start.file.url}@${span.start.line}:${span.start.offset}`).toMatch(location);
     }
   }
 
@@ -81,6 +83,543 @@ describe('ng type checker', () => {
     });
   });
 
+  describe('type narrowing', () => {
+    const a = (files: MockFiles, options: object = {}) => {
+      accept(files, {fullTemplateTypeCheck: true, ...options});
+    };
+
+    it('should narrow an *ngIf like directive', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfTypeGuard: <T>(v: T | null | undefined | false) => v is T;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow a renamed *ngIf like directive', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *my-if="person"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[my-if]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input('my-if')
+          set myIf(condition: any) {}
+
+          static myIfTypeGuard: <T>(v: T | null | undefined | false) => v is T;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow a type in a nested *ngIf like directive', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Address {
+          street: string;
+        }
+
+        export interface Person {
+          name: string;
+          address?: Address;
+        }
+
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person"> {{person.name}} <span *myIf="person.address">{{person.address.street}}</span></div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfTypeGuard: <T>(v: T | null | undefined | false) => v is T;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow an *ngIf like directive with UseIf', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow a renamed *ngIf like directive with UseIf', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *my-if="person"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[my-if]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input('my-if')
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow a type in a nested *ngIf like directive with UseIf', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Address {
+          street: string;
+        }
+
+        export interface Person {
+          name: string;
+          address?: Address;
+        }
+
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person"> {{person.name}} <span *myIf="person.address">{{person.address.street}}</span></div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow an *ngIf like directive with UseIf and &&', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Address {
+          street: string;
+        }
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person && address"> {{person.name}} lives at {{address.street}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+          address?: Address;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow an *ngIf like directive with UseIf and !!', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="!!person"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow an *ngIf like directive with UseIf and != null', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person != null"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person: Person | null = null;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+
+    it('should narrow an *ngIf like directive with UseIf and != undefined', () => {
+      a({
+        'src/app.component.ts': '',
+        'src/lib.ts': '',
+        'src/app.module.ts': `
+        import {NgModule, Component, Directive, HostListener, TemplateRef, Input} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: '<div *myIf="person != undefined"> {{person.name}} </div>'
+        })
+        export class MainComp {
+          person?: Person;
+        }
+
+        export class MyIfContext {
+          public $implicit: any = null;
+          public myIf: any = null;
+        }
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+          constructor(templateRef: TemplateRef<MyIfContext>) {}
+
+          @Input()
+          set myIf(condition: any) {}
+
+          static myIfUseIfTypeGuard: void;
+        }
+
+        @NgModule({
+          declarations: [MainComp, MyIf],
+        })
+        export class MainModule {}`
+      });
+    });
+  });
+
+  describe('casting $any', () => {
+    const a = (files: MockFiles, options: object = {}) => {
+      accept(
+          {'src/app.component.ts': '', 'src/lib.ts': '', ...files},
+          {fullTemplateTypeCheck: true, ...options});
+    };
+
+    const r =
+        (message: string | RegExp, location: RegExp | null, files: MockFiles,
+         options: object = {}) => {
+          reject(
+              message, location, {'src/app.component.ts': '', 'src/lib.ts': '', ...files},
+              {fullTemplateTypeCheck: true, ...options});
+        };
+
+    it('should allow member access of an expression', () => {
+      a({
+        'src/app.module.ts': `
+        import {NgModule, Component} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: ' {{$any(person).address}}'
+        })
+        export class MainComp {
+          person: Person;
+        }
+
+        @NgModule({
+          declarations: [MainComp],
+        })
+        export class MainModule {
+        }`
+      });
+    });
+
+    it('should allow invalid this.member access', () => {
+      a({
+        'src/app.module.ts': `
+        import {NgModule, Component} from '@angular/core';
+
+        @Component({
+          selector: 'comp',
+          template: ' {{$any(this).missing}}'
+        })
+        export class MainComp { }
+
+        @NgModule({
+          declarations: [MainComp],
+        })
+        export class MainModule {
+        }`
+      });
+    });
+
+    it('should reject too few parameters to $any', () => {
+      r(/Invalid call to \$any, expected 1 argument but received none/, null, {
+        'src/app.module.ts': `
+        import {NgModule, Component} from '@angular/core';
+
+        @Component({
+          selector: 'comp',
+          template: ' {{$any().missing}}'
+        })
+        export class MainComp { }
+
+        @NgModule({
+          declarations: [MainComp],
+        })
+        export class MainModule {
+        }`
+      });
+    });
+
+    it('should reject too many parameters to $any', () => {
+      r(/Invalid call to \$any, expected 1 argument but received 2/, null, {
+        'src/app.module.ts': `
+        import {NgModule, Component} from '@angular/core';
+
+        export interface Person {
+          name: string;
+        }
+
+        @Component({
+          selector: 'comp',
+          template: ' {{$any(person, 12).missing}}'
+        })
+        export class MainComp {
+          person: Person;
+        }
+
+        @NgModule({
+          declarations: [MainComp],
+        })
+        export class MainModule {
+        }`
+      });
+    });
+  });
+
   describe('regressions ', () => {
     const a = (files: MockFiles, options: object = {}) => {
       accept(files, {fullTemplateTypeCheck: true, ...options});

packages/compiler-cli/test/metadata/collector_spec.ts

@@ -1038,6 +1038,25 @@ describe('Collector', () => {
       expect(metadata).toBeUndefined();
     });
 
+    it('should collect type guards', () => {
+      const metadata = collectSource(`
+        import {Directive, Input, TemplateRef} from '@angular/core';
+
+        @Directive({selector: '[myIf]'})
+        export class MyIf {
+
+          constructor(private templateRef: TemplateRef) {}
+
+          @Input() myIf: any;
+
+          static typeGuard: <T>(v: T | null | undefined): v is T;
+        }
+      `);
+
+      expect((metadata.metadata.MyIf as any).statics.typeGuard)
+          .not.toBeUndefined('typeGuard was not collected');
+    });
+
     it('should be able to collect an invalid access expression', () => {
       const source = createSource(`
         import {Component} from '@angular/core';

packages/compiler-cli/test/test_support.ts

@@ -12,6 +12,7 @@ import * as path from 'path';
 import * as ts from 'typescript';
 import * as ng from '../index';
 
+// TEST_TMPDIR is set by bazel.
 const tmpdir = process.env.TEST_TMPDIR || os.tmpdir();
 
 function getNgRootDir() {
@@ -21,7 +22,6 @@ function getNgRootDir() {
 }
 
 export function writeTempFile(name: string, contents: string): string {
-  // TEST_TMPDIR is set by bazel.
   const id = (Math.random() * 1000000).toFixed(0);
   const fn = path.join(tmpdir, `tmp.${id}.${name}`);
   fs.writeFileSync(fn, contents);
@@ -29,8 +29,12 @@ export function writeTempFile(name: string, contents: string): string {
 }
 
 export function makeTempDir(): string {
-  const id = (Math.random() * 1000000).toFixed(0);
-  const dir = path.join(tmpdir, `tmp.${id}`);
+  let dir: string;
+  while (true) {
+    const id = (Math.random() * 1000000).toFixed(0);
+    dir = path.join(tmpdir, `tmp.${id}`);
+    if (!fs.existsSync(dir)) break;
+  }
   fs.mkdirSync(dir);
   return dir;
 }

packages/compiler/src/aot/compiler.ts

@@ -218,15 +218,14 @@ export class AotCompiler {
 
       const externalReferenceVars = new Map<any, string>();
       externalReferences.forEach((ref, typeIndex) => {
-        if (this._host.isSourceFile(ref.filePath)) {
-          externalReferenceVars.set(ref, `_decl${ngModuleIndex}_${typeIndex}`);
-        }
+        externalReferenceVars.set(ref, `_decl${ngModuleIndex}_${typeIndex}`);
       });
       externalReferenceVars.forEach((varName, reference) => {
         outputCtx.statements.push(
             o.variable(varName)
                 .set(o.NULL_EXPR.cast(o.DYNAMIC_TYPE))
-                .toDeclStmt(o.expressionType(outputCtx.importExpr(reference))));
+                .toDeclStmt(o.expressionType(outputCtx.importExpr(
+                    reference, /* typeParams */ null, /* useSummaries */ false))));
       });
 
       if (emitFlags & StubEmitFlags.TypeCheck) {
@@ -271,7 +270,7 @@ export class AotCompiler {
     const {template: parsedTemplate, pipes: usedPipes} =
         this._parseTemplate(compMeta, moduleMeta, directives);
     ctx.statements.push(...this._typeCheckCompiler.compileComponent(
-        componentId, compMeta, parsedTemplate, usedPipes, externalReferenceVars));
+        componentId, compMeta, parsedTemplate, usedPipes, externalReferenceVars, ctx));
   }
 
   emitMessageBundle(analyzeResult: NgAnalyzedModules, locale: string|null): MessageBundle {
@@ -515,35 +514,38 @@ export class AotCompiler {
   }
 
   private _createOutputContext(genFilePath: string): OutputContext {
-    const importExpr = (symbol: StaticSymbol, typeParams: o.Type[] | null = null) => {
-      if (!(symbol instanceof StaticSymbol)) {
-        throw new Error(`Internal error: unknown identifier ${JSON.stringify(symbol)}`);
-      }
-      const arity = this._symbolResolver.getTypeArity(symbol) || 0;
-      const {filePath, name, members} = this._symbolResolver.getImportAs(symbol) || symbol;
-      const importModule = this._fileNameToModuleName(filePath, genFilePath);
+    const importExpr =
+        (symbol: StaticSymbol, typeParams: o.Type[] | null = null,
+         useSummaries: boolean = true) => {
+          if (!(symbol instanceof StaticSymbol)) {
+            throw new Error(`Internal error: unknown identifier ${JSON.stringify(symbol)}`);
+          }
+          const arity = this._symbolResolver.getTypeArity(symbol) || 0;
+          const {filePath, name, members} =
+              this._symbolResolver.getImportAs(symbol, useSummaries) || symbol;
+          const importModule = this._fileNameToModuleName(filePath, genFilePath);
 
-      // It should be good enough to compare filePath to genFilePath and if they are equal
-      // there is a self reference. However, ngfactory files generate to .ts but their
-      // symbols have .d.ts so a simple compare is insufficient. They should be canonical
-      // and is tracked by #17705.
-      const selfReference = this._fileNameToModuleName(genFilePath, genFilePath);
-      const moduleName = importModule === selfReference ? null : importModule;
+          // It should be good enough to compare filePath to genFilePath and if they are equal
+          // there is a self reference. However, ngfactory files generate to .ts but their
+          // symbols have .d.ts so a simple compare is insufficient. They should be canonical
+          // and is tracked by #17705.
+          const selfReference = this._fileNameToModuleName(genFilePath, genFilePath);
+          const moduleName = importModule === selfReference ? null : importModule;
 
-      // If we are in a type expression that refers to a generic type then supply
-      // the required type parameters. If there were not enough type parameters
-      // supplied, supply any as the type. Outside a type expression the reference
-      // should not supply type parameters and be treated as a simple value reference
-      // to the constructor function itself.
-      const suppliedTypeParams = typeParams || [];
-      const missingTypeParamsCount = arity - suppliedTypeParams.length;
-      const allTypeParams =
-          suppliedTypeParams.concat(new Array(missingTypeParamsCount).fill(o.DYNAMIC_TYPE));
-      return members.reduce(
-          (expr, memberName) => expr.prop(memberName),
-          <o.Expression>o.importExpr(
-              new o.ExternalReference(moduleName, name, null), allTypeParams));
-    };
+          // If we are in a type expression that refers to a generic type then supply
+          // the required type parameters. If there were not enough type parameters
+          // supplied, supply any as the type. Outside a type expression the reference
+          // should not supply type parameters and be treated as a simple value reference
+          // to the constructor function itself.
+          const suppliedTypeParams = typeParams || [];
+          const missingTypeParamsCount = arity - suppliedTypeParams.length;
+          const allTypeParams =
+              suppliedTypeParams.concat(new Array(missingTypeParamsCount).fill(o.DYNAMIC_TYPE));
+          return members.reduce(
+              (expr, memberName) => expr.prop(memberName),
+              <o.Expression>o.importExpr(
+                  new o.ExternalReference(moduleName, name, null), allTypeParams));
+        };
 
     return {statements: [], genFilePath, importExpr};
   }

packages/compiler/src/aot/static_reflector.ts

@@ -29,6 +29,8 @@ const IGNORE = {
 const USE_VALUE = 'useValue';
 const PROVIDE = 'provide';
 const REFERENCE_SET = new Set([USE_VALUE, 'useFactory', 'data']);
+const TYPEGUARD_POSTFIX = 'TypeGuard';
+const USE_IF = 'UseIf';
 
 function shouldIgnore(value: any): boolean {
   return value && value.__symbolic == 'ignore';
@@ -43,6 +45,7 @@ export class StaticReflector implements CompileReflector {
   private propertyCache = new Map<StaticSymbol, {[key: string]: any[]}>();
   private parameterCache = new Map<StaticSymbol, any[]>();
   private methodCache = new Map<StaticSymbol, {[key: string]: boolean}>();
+  private staticCache = new Map<StaticSymbol, string[]>();
   private conversionMap = new Map<StaticSymbol, (context: StaticSymbol, args: any[]) => any>();
   private injectionToken: StaticSymbol;
   private opaqueToken: StaticSymbol;
@@ -251,6 +254,18 @@ export class StaticReflector implements CompileReflector {
     return methodNames;
   }
 
+  private _staticMembers(type: StaticSymbol): string[] {
+    let staticMembers = this.staticCache.get(type);
+    if (!staticMembers) {
+      const classMetadata = this.getTypeMetadata(type);
+      const staticMemberData = classMetadata['statics'] || {};
+      staticMembers = Object.keys(staticMemberData);
+      this.staticCache.set(type, staticMembers);
+    }
+    return staticMembers;
+  }
+
+
   private findParentType(type: StaticSymbol, classMetadata: any): StaticSymbol|undefined {
     const parentType = this.trySimplify(type, classMetadata['extends']);
     if (parentType instanceof StaticSymbol) {
@@ -273,6 +288,30 @@ export class StaticReflector implements CompileReflector {
     }
   }
 
+  guards(type: any): {[key: string]: StaticSymbol} {
+    if (!(type instanceof StaticSymbol)) {
+      this.reportError(
+          new Error(`guards received ${JSON.stringify(type)} which is not a StaticSymbol`), type);
+      return {};
+    }
+    const staticMembers = this._staticMembers(type);
+    const result: {[key: string]: StaticSymbol} = {};
+    for (let name of staticMembers) {
+      if (name.endsWith(TYPEGUARD_POSTFIX)) {
+        let property = name.substr(0, name.length - TYPEGUARD_POSTFIX.length);
+        let value: any;
+        if (property.endsWith(USE_IF)) {
+          property = name.substr(0, property.length - USE_IF.length);
+          value = USE_IF;
+        } else {
+          value = this.getStaticSymbol(type.filePath, type.name, [name]);
+        }
+        result[property] = value;
+      }
+    }
+    return result;
+  }
+
   private _registerDecoratorOrConstructor(type: StaticSymbol, ctor: any): void {
     this.conversionMap.set(type, (context: StaticSymbol, args: any[]) => new ctor(...args));
   }

packages/compiler/src/aot/static_symbol_resolver.ts

@@ -98,10 +98,10 @@ export class StaticSymbolResolver {
    *
    * @param staticSymbol the symbol for which to generate a import symbol
    */
-  getImportAs(staticSymbol: StaticSymbol): StaticSymbol|null {
+  getImportAs(staticSymbol: StaticSymbol, useSummaries: boolean = true): StaticSymbol|null {
     if (staticSymbol.members.length) {
       const baseSymbol = this.getStaticSymbol(staticSymbol.filePath, staticSymbol.name);
-      const baseImportAs = this.getImportAs(baseSymbol);
+      const baseImportAs = this.getImportAs(baseSymbol, useSummaries);
       return baseImportAs ?
           this.getStaticSymbol(baseImportAs.filePath, baseImportAs.name, staticSymbol.members) :
           null;
@@ -111,14 +111,14 @@ export class StaticSymbolResolver {
       const summarizedName = stripSummaryForJitNameSuffix(staticSymbol.name);
       const baseSymbol =
           this.getStaticSymbol(summarizedFileName, summarizedName, staticSymbol.members);
-      const baseImportAs = this.getImportAs(baseSymbol);
+      const baseImportAs = this.getImportAs(baseSymbol, useSummaries);
       return baseImportAs ?
           this.getStaticSymbol(
               summaryForJitFileName(baseImportAs.filePath), summaryForJitName(baseImportAs.name),
               baseSymbol.members) :
           null;
     }
-    let result = this.summaryResolver.getImportAs(staticSymbol);
+    let result = (useSummaries && this.summaryResolver.getImportAs(staticSymbol)) || null;
     if (!result) {
       result = this.importAs.get(staticSymbol) !;
     }

packages/compiler/src/compile_metadata.ts

@@ -254,6 +254,7 @@ export interface CompileDirectiveSummary extends CompileTypeSummary {
   providers: CompileProviderMetadata[];
   viewProviders: CompileProviderMetadata[];
   queries: CompileQueryMetadata[];
+  guards: {[key: string]: any};
   viewQueries: CompileQueryMetadata[];
   entryComponents: CompileEntryComponentMetadata[];
   changeDetection: ChangeDetectionStrategy|null;
@@ -268,8 +269,8 @@ export interface CompileDirectiveSummary extends CompileTypeSummary {
  */
 export class CompileDirectiveMetadata {
   static create({isHost, type, isComponent, selector, exportAs, changeDetection, inputs, outputs,
-                 host, providers, viewProviders, queries, viewQueries, entryComponents, template,
-                 componentViewType, rendererType, componentFactory}: {
+                 host, providers, viewProviders, queries, guards, viewQueries, entryComponents,
+                 template, componentViewType, rendererType, componentFactory}: {
     isHost: boolean,
     type: CompileTypeMetadata,
     isComponent: boolean,
@@ -282,6 +283,7 @@ export class CompileDirectiveMetadata {
     providers: CompileProviderMetadata[],
     viewProviders: CompileProviderMetadata[],
     queries: CompileQueryMetadata[],
+    guards: {[key: string]: any};
     viewQueries: CompileQueryMetadata[],
     entryComponents: CompileEntryComponentMetadata[],
     template: CompileTemplateMetadata,
@@ -336,6 +338,7 @@ export class CompileDirectiveMetadata {
       providers,
       viewProviders,
       queries,
+      guards,
       viewQueries,
       entryComponents,
       template,
@@ -358,6 +361,7 @@ export class CompileDirectiveMetadata {
   providers: CompileProviderMetadata[];
   viewProviders: CompileProviderMetadata[];
   queries: CompileQueryMetadata[];
+  guards: {[key: string]: any};
   viewQueries: CompileQueryMetadata[];
   entryComponents: CompileEntryComponentMetadata[];
 
@@ -367,10 +371,27 @@ export class CompileDirectiveMetadata {
   rendererType: StaticSymbol|object|null;
   componentFactory: StaticSymbol|object|null;
 
-  constructor({isHost,          type,      isComponent,       selector,      exportAs,
-               changeDetection, inputs,    outputs,           hostListeners, hostProperties,
-               hostAttributes,  providers, viewProviders,     queries,       viewQueries,
-               entryComponents, template,  componentViewType, rendererType,  componentFactory}: {
+  constructor({isHost,
+               type,
+               isComponent,
+               selector,
+               exportAs,
+               changeDetection,
+               inputs,
+               outputs,
+               hostListeners,
+               hostProperties,
+               hostAttributes,
+               providers,
+               viewProviders,
+               queries,
+               guards,
+               viewQueries,
+               entryComponents,
+               template,
+               componentViewType,
+               rendererType,
+               componentFactory}: {
     isHost: boolean,
     type: CompileTypeMetadata,
     isComponent: boolean,
@@ -385,6 +406,7 @@ export class CompileDirectiveMetadata {
     providers: CompileProviderMetadata[],
     viewProviders: CompileProviderMetadata[],
     queries: CompileQueryMetadata[],
+    guards: {[key: string]: any},
     viewQueries: CompileQueryMetadata[],
     entryComponents: CompileEntryComponentMetadata[],
     template: CompileTemplateMetadata|null,
@@ -406,6 +428,7 @@ export class CompileDirectiveMetadata {
     this.providers = _normalizeArray(providers);
     this.viewProviders = _normalizeArray(viewProviders);
     this.queries = _normalizeArray(queries);
+    this.guards = guards;
     this.viewQueries = _normalizeArray(viewQueries);
     this.entryComponents = _normalizeArray(entryComponents);
     this.template = template;
@@ -430,6 +453,7 @@ export class CompileDirectiveMetadata {
       providers: this.providers,
       viewProviders: this.viewProviders,
       queries: this.queries,
+      guards: this.guards,
       viewQueries: this.viewQueries,
       entryComponents: this.entryComponents,
       changeDetection: this.changeDetection,

packages/compiler/src/compile_reflector.ts

@@ -17,6 +17,7 @@ export abstract class CompileReflector {
   abstract annotations(typeOrFunc: /*Type*/ any): any[];
   abstract propMetadata(typeOrFunc: /*Type*/ any): {[key: string]: any[]};
   abstract hasLifecycleHook(type: any, lcProperty: string): boolean;
+  abstract guards(typeOrFunc: /* Type */ any): {[key: string]: any};
   abstract componentModuleUrl(type: /*Type*/ any, cmpMetadata: Component): string;
   abstract resolveExternalReference(ref: o.ExternalReference): any;
 }

packages/compiler/src/compiler_util/expression_converter.ts

@@ -90,6 +90,14 @@ export class ConvertPropertyBindingResult {
   constructor(public stmts: o.Statement[], public currValExpr: o.Expression) {}
 }
 
+export enum BindingForm {
+  // The general form of binding expression, supports all expressions.
+  General,
+
+  // Try to generate a simple binding (no temporaries or statements)
+  // otherise generate a general binding
+  TrySimple,
+}
 /**
  * Converts the given expression AST into an executable output AST, assuming the expression
  * is used in property binding. The expression has to be preprocessed via
@@ -97,7 +105,8 @@ export class ConvertPropertyBindingResult {
  */
 export function convertPropertyBinding(
     localResolver: LocalResolver | null, implicitReceiver: o.Expression,
-    expressionWithoutBuiltins: cdAst.AST, bindingId: string): ConvertPropertyBindingResult {
+    expressionWithoutBuiltins: cdAst.AST, bindingId: string,
+    form: BindingForm): ConvertPropertyBindingResult {
   if (!localResolver) {
     localResolver = new DefaultLocalResolver();
   }
@@ -110,9 +119,11 @@ export function convertPropertyBinding(
     for (let i = 0; i < visitor.temporaryCount; i++) {
       stmts.push(temporaryDeclaration(bindingId, i));
     }
+  } else if (form == BindingForm.TrySimple) {
+    return new ConvertPropertyBindingResult([], outputExpr);
   }
 
-  stmts.push(currValExpr.set(outputExpr).toDeclStmt(null, [o.StmtModifier.Final]));
+  stmts.push(currValExpr.set(outputExpr).toDeclStmt(o.DYNAMIC_TYPE, [o.StmtModifier.Final]));
   return new ConvertPropertyBindingResult(stmts, currValExpr);
 }
 
@@ -323,12 +334,27 @@ class _AstToIrVisitor implements cdAst.AstVisitor {
   }
 
   visitLiteralPrimitive(ast: cdAst.LiteralPrimitive, mode: _Mode): any {
-    return convertToStatementIfNeeded(mode, o.literal(ast.value));
+    // For literal values of null, undefined, true, or false allow type inteference
+    // to infer the type.
+    const type =
+        ast.value === null || ast.value === undefined || ast.value === true || ast.value === true ?
+        o.INFERRED_TYPE :
+        undefined;
+    return convertToStatementIfNeeded(mode, o.literal(ast.value, type));
   }
 
   private _getLocal(name: string): o.Expression|null { return this._localResolver.getLocal(name); }
 
   visitMethodCall(ast: cdAst.MethodCall, mode: _Mode): any {
+    if (ast.receiver instanceof cdAst.ImplicitReceiver && ast.name == '$any') {
+      const args = this.visitAll(ast.args, _Mode.Expression) as any[];
+      if (args.length != 1) {
+        throw new Error(
+            `Invalid call to $any, expected 1 argument but received ${args.length || 'none'}`);
+      }
+      return (args[0] as o.Expression).cast(o.DYNAMIC_TYPE);
+    }
+
     const leftMostSafe = this.leftMostSafeNode(ast);
     if (leftMostSafe) {
       return this.convertSafeAccess(ast, leftMostSafe, mode);

packages/compiler/src/core.ts

@@ -51,6 +51,7 @@ export interface Directive {
   providers?: Provider[];
   exportAs?: string;
   queries?: {[key: string]: any};
+  guards?: {[key: string]: any};
 }
 export const createDirective =
     makeMetadataFactory<Directive>('Directive', (dir: Directive = {}) => dir);

packages/compiler/src/directive_resolver.ts

@@ -44,7 +44,8 @@ export class DirectiveResolver {
       const metadata = findLast(typeMetadata, isDirectiveMetadata);
       if (metadata) {
         const propertyMetadata = this._reflector.propMetadata(type);
-        return this._mergeWithPropertyMetadata(metadata, propertyMetadata, type);
+        const guards = this._reflector.guards(type);
+        return this._mergeWithPropertyMetadata(metadata, propertyMetadata, guards, type);
       }
     }
 
@@ -56,12 +57,12 @@ export class DirectiveResolver {
   }
 
   private _mergeWithPropertyMetadata(
-      dm: Directive, propertyMetadata: {[key: string]: any[]}, directiveType: Type): Directive {
+      dm: Directive, propertyMetadata: {[key: string]: any[]}, guards: {[key: string]: any},
+      directiveType: Type): Directive {
     const inputs: string[] = [];
     const outputs: string[] = [];
     const host: {[key: string]: string} = {};
     const queries: {[key: string]: any} = {};
-
     Object.keys(propertyMetadata).forEach((propName: string) => {
       const input = findLast(propertyMetadata[propName], (a) => createInput.isTypeOf(a));
       if (input) {
@@ -105,18 +106,20 @@ export class DirectiveResolver {
         queries[propName] = query;
       }
     });
-    return this._merge(dm, inputs, outputs, host, queries, directiveType);
+    return this._merge(dm, inputs, outputs, host, queries, guards, directiveType);
   }
 
   private _extractPublicName(def: string) { return splitAtColon(def, [null !, def])[1].trim(); }
 
   private _dedupeBindings(bindings: string[]): string[] {
     const names = new Set<string>();
+    const publicNames = new Set<string>();
     const reversedResult: string[] = [];
     // go last to first to allow later entries to overwrite previous entries
     for (let i = bindings.length - 1; i >= 0; i--) {
       const binding = bindings[i];
       const name = this._extractPublicName(binding);
+      publicNames.add(name);
       if (!names.has(name)) {
         names.add(name);
         reversedResult.push(binding);
@@ -127,14 +130,13 @@ export class DirectiveResolver {
 
   private _merge(
       directive: Directive, inputs: string[], outputs: string[], host: {[key: string]: string},
-      queries: {[key: string]: any}, directiveType: Type): Directive {
+      queries: {[key: string]: any}, guards: {[key: string]: any}, directiveType: Type): Directive {
     const mergedInputs =
         this._dedupeBindings(directive.inputs ? directive.inputs.concat(inputs) : inputs);
     const mergedOutputs =
         this._dedupeBindings(directive.outputs ? directive.outputs.concat(outputs) : outputs);
     const mergedHost = directive.host ? {...directive.host, ...host} : host;
     const mergedQueries = directive.queries ? {...directive.queries, ...queries} : queries;
-
     if (createComponent.isTypeOf(directive)) {
       const comp = directive as Component;
       return createComponent({
@@ -166,7 +168,7 @@ export class DirectiveResolver {
         host: mergedHost,
         exportAs: directive.exportAs,
         queries: mergedQueries,
-        providers: directive.providers
+        providers: directive.providers, guards
       });
     }
   }

packages/compiler/src/metadata_resolver.ts

@@ -208,6 +208,7 @@ export class CompileMetadataResolver {
       providers: [],
       viewProviders: [],
       queries: [],
+      guards: {},
       viewQueries: [],
       componentViewType: hostViewType,
       rendererType:
@@ -240,6 +241,7 @@ export class CompileMetadataResolver {
         providers: metadata.providers,
         viewProviders: metadata.viewProviders,
         queries: metadata.queries,
+        guards: metadata.guards,
         viewQueries: metadata.viewQueries,
         entryComponents: metadata.entryComponents,
         componentViewType: metadata.componentViewType,
@@ -383,6 +385,7 @@ export class CompileMetadataResolver {
       providers: providers || [],
       viewProviders: viewProviders || [],
       queries: queries || [],
+      guards: dirMeta.guards || {},
       viewQueries: viewQueries || [],
       entryComponents: entryComponentMetadata,
       componentViewType: nonNormalizedTemplateMetadata ? this.getComponentViewClass(directiveType) :

packages/compiler/src/util.ts

@@ -152,7 +152,7 @@ export function utf8Encode(str: string): string {
 export interface OutputContext {
   genFilePath: string;
   statements: o.Statement[];
-  importExpr(reference: any, typeParams?: o.Type[]|null): o.Expression;
+  importExpr(reference: any, typeParams?: o.Type[]|null, useSummaries?: boolean): o.Expression;
 }
 
 export function stringify(token: any): string {

packages/compiler/src/view_compiler/type_check_compiler.ts

@@ -10,13 +10,15 @@ import {AotCompilerOptions} from '../aot/compiler_options';
 import {StaticReflector} from '../aot/static_reflector';
 import {StaticSymbol} from '../aot/static_symbol';
 import {CompileDiDependencyMetadata, CompileDirectiveMetadata, CompilePipeSummary} from '../compile_metadata';
-import {BuiltinConverter, EventHandlerVars, LocalResolver, convertActionBinding, convertPropertyBinding, convertPropertyBindingBuiltins} from '../compiler_util/expression_converter';
+import {BindingForm, BuiltinConverter, EventHandlerVars, LocalResolver, convertActionBinding, convertPropertyBinding, convertPropertyBindingBuiltins} from '../compiler_util/expression_converter';
 import {AST, ASTWithSource, Interpolation} from '../expression_parser/ast';
 import {Identifiers} from '../identifiers';
 import * as o from '../output/output_ast';
 import {convertValueToOutputAst} from '../output/value_util';
 import {ParseSourceSpan} from '../parse_util';
 import {AttrAst, BoundDirectivePropertyAst, BoundElementPropertyAst, BoundEventAst, BoundTextAst, DirectiveAst, ElementAst, EmbeddedTemplateAst, NgContentAst, PropertyBindingType, ProviderAst, ProviderAstType, QueryMatch, ReferenceAst, TemplateAst, TemplateAstVisitor, TextAst, VariableAst, templateVisitAll} from '../template_parser/template_ast';
+import {OutputContext} from '../util';
+
 
 /**
  * Generates code that is used to type check templates.
@@ -34,27 +36,34 @@ export class TypeCheckCompiler {
    */
   compileComponent(
       componentId: string, component: CompileDirectiveMetadata, template: TemplateAst[],
-      usedPipes: CompilePipeSummary[],
-      externalReferenceVars: Map<StaticSymbol, string>): o.Statement[] {
+      usedPipes: CompilePipeSummary[], externalReferenceVars: Map<StaticSymbol, string>,
+      ctx: OutputContext): o.Statement[] {
     const pipes = new Map<string, StaticSymbol>();
     usedPipes.forEach(p => pipes.set(p.name, p.type.reference));
     let embeddedViewCount = 0;
-    const viewBuilderFactory = (parent: ViewBuilder | null): ViewBuilder => {
-      const embeddedViewIndex = embeddedViewCount++;
-      return new ViewBuilder(
-          this.options, this.reflector, externalReferenceVars, parent, component.type.reference,
-          component.isHost, embeddedViewIndex, pipes, viewBuilderFactory);
-    };
+    const viewBuilderFactory =
+        (parent: ViewBuilder | null, guards: GuardExpression[]): ViewBuilder => {
+          const embeddedViewIndex = embeddedViewCount++;
+          return new ViewBuilder(
+              this.options, this.reflector, externalReferenceVars, parent, component.type.reference,
+              component.isHost, embeddedViewIndex, pipes, guards, ctx, viewBuilderFactory);
+        };
 
-    const visitor = viewBuilderFactory(null);
+    const visitor = viewBuilderFactory(null, []);
     visitor.visitAll([], template);
 
     return visitor.build(componentId);
   }
 }
 
+interface GuardExpression {
+  guard: StaticSymbol;
+  useIf: boolean;
+  expression: Expression;
+}
+
 interface ViewBuilderFactory {
-  (parent: ViewBuilder): ViewBuilder;
+  (parent: ViewBuilder, guards: GuardExpression[]): ViewBuilder;
 }
 
 // Note: This is used as key in Map and should therefore be
@@ -94,6 +103,7 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
       private externalReferenceVars: Map<StaticSymbol, string>, private parent: ViewBuilder|null,
       private component: StaticSymbol, private isHostComponent: boolean,
       private embeddedViewIndex: number, private pipes: Map<string, StaticSymbol>,
+      private guards: GuardExpression[], private ctx: OutputContext,
       private viewBuilderFactory: ViewBuilderFactory) {}
 
   private getOutputVar(type: o.BuiltinTypeName|StaticSymbol): string {
@@ -112,6 +122,24 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
     return varName;
   }
 
+  private getTypeGuardExpressions(ast: EmbeddedTemplateAst): GuardExpression[] {
+    const result = [...this.guards];
+    for (let directive of ast.directives) {
+      for (let input of directive.inputs) {
+        const guard = directive.directive.guards[input.directiveName];
+        if (guard) {
+          const useIf = guard === 'UseIf';
+          result.push({
+            guard,
+            useIf,
+            expression: {context: this.component, value: input.value} as Expression
+          });
+        }
+      }
+    }
+    return result;
+  }
+
   visitAll(variables: VariableAst[], astNodes: TemplateAst[]) {
     this.variables = variables;
     templateVisitAll(this, astNodes);
@@ -119,7 +147,7 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
 
   build(componentId: string, targetStatements: o.Statement[] = []): o.Statement[] {
     this.children.forEach((child) => child.build(componentId, targetStatements));
-    const viewStmts: o.Statement[] =
+    let viewStmts: o.Statement[] =
         [o.variable(DYNAMIC_VAR_NAME).set(o.NULL_EXPR).toDeclStmt(o.DYNAMIC_TYPE)];
     let bindingCount = 0;
     this.updates.forEach((expression) => {
@@ -127,7 +155,8 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
       const bindingId = `${bindingCount++}`;
       const nameResolver = context === this.component ? this : defaultResolver;
       const {stmts, currValExpr} = convertPropertyBinding(
-          nameResolver, o.variable(this.getOutputVar(context)), value, bindingId);
+          nameResolver, o.variable(this.getOutputVar(context)), value, bindingId,
+          BindingForm.General);
       stmts.push(new o.ExpressionStatement(currValExpr));
       viewStmts.push(...stmts.map(
           (stmt: o.Statement) => o.applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));
@@ -142,6 +171,28 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
           (stmt: o.Statement) => o.applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));
     });
 
+    if (this.guards.length) {
+      let guardExpression: o.Expression|undefined = undefined;
+      for (const guard of this.guards) {
+        const {context, value} = this.preprocessUpdateExpression(guard.expression);
+        const bindingId = `${bindingCount++}`;
+        const nameResolver = context === this.component ? this : defaultResolver;
+        // We only support support simple expressions and ignore others as they
+        // are unlikely to affect type narrowing.
+        const {stmts, currValExpr} = convertPropertyBinding(
+            nameResolver, o.variable(this.getOutputVar(context)), value, bindingId,
+            BindingForm.TrySimple);
+        if (stmts.length == 0) {
+          const guardClause =
+              guard.useIf ? currValExpr : this.ctx.importExpr(guard.guard).callFn([currValExpr]);
+          guardExpression = guardExpression ? guardExpression.and(guardClause) : guardClause;
+        }
+      }
+      if (guardExpression) {
+        viewStmts = [new o.IfStmt(guardExpression, viewStmts)];
+      }
+    }
+
     const viewName = `_View_${componentId}_${this.embeddedViewIndex}`;
     const viewFactory = new o.DeclareFunctionStmt(viewName, [], viewStmts);
     targetStatements.push(viewFactory);
@@ -163,7 +214,12 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
     // for the context in any embedded view.
     // We keep this behaivor behind a flag for now.
     if (this.options.fullTemplateTypeCheck) {
-      const childVisitor = this.viewBuilderFactory(this);
+      // Find any applicable type guards. For example, NgIf has a type guard on ngIf
+      // (see NgIf.ngIfTypeGuard) that can be used to indicate that a template is only
+      // stamped out if ngIf is truthy so any bindings in the template can assume that,
+      // if a nullable type is used for ngIf, that expression is not null or undefined.
+      const guards = this.getTypeGuardExpressions(ast);
+      const childVisitor = this.viewBuilderFactory(this, guards);
       this.children.push(childVisitor);
       childVisitor.visitAll(ast.variables, ast.children);
     }

packages/compiler/src/view_compiler/view_compiler.ts

@@ -8,7 +8,7 @@
 
 import {CompileDirectiveMetadata, CompilePipeSummary, rendererTypeName, tokenReference, viewClassName} from '../compile_metadata';
 import {CompileReflector} from '../compile_reflector';
-import {BuiltinConverter, EventHandlerVars, LocalResolver, convertActionBinding, convertPropertyBinding, convertPropertyBindingBuiltins} from '../compiler_util/expression_converter';
+import {BindingForm, BuiltinConverter, EventHandlerVars, LocalResolver, convertActionBinding, convertPropertyBinding, convertPropertyBindingBuiltins} from '../compiler_util/expression_converter';
 import {ArgumentType, BindingFlags, ChangeDetectionStrategy, NodeFlags, QueryBindingType, QueryValueType, ViewFlags} from '../core';
 import {AST, ASTWithSource, Interpolation} from '../expression_parser/ast';
 import {Identifiers} from '../identifiers';
@@ -859,7 +859,7 @@ class ViewBuilder implements TemplateAstVisitor, LocalResolver {
         const bindingId = `${updateBindingCount++}`;
         const nameResolver = context === COMP_VAR ? self : null;
         const {stmts, currValExpr} =
-            convertPropertyBinding(nameResolver, context, value, bindingId);
+            convertPropertyBinding(nameResolver, context, value, bindingId, BindingForm.General);
         updateStmts.push(...stmts.map(
             (stmt: o.Statement) => o.applySourceSpanToStatementIfNeeded(stmt, sourceSpan)));
         return o.applySourceSpanToExpressionIfNeeded(currValExpr, sourceSpan);

packages/compiler/test/aot/static_symbol_resolver_spec.ts

@@ -196,6 +196,25 @@ describe('StaticSymbolResolver', () => {
           .toBe(symbolCache.get('/test3.d.ts', 'b'));
     });
 
+    it('should ignore summaries for inputAs if requested', () => {
+      init(
+          {
+            '/test.ts': `
+        export {a} from './test2';
+      `
+          },
+          [], [{
+            symbol: symbolCache.get('/test2.d.ts', 'a'),
+            importAs: symbolCache.get('/test3.d.ts', 'b')
+          }]);
+
+      symbolResolver.getSymbolsOf('/test.ts');
+
+      expect(
+          symbolResolver.getImportAs(symbolCache.get('/test2.d.ts', 'a'), /* useSummaries */ false))
+          .toBeUndefined();
+    });
+
     it('should calculate importAs for symbols with members based on importAs for symbols without',
        () => {
          init(

packages/compiler/test/directive_resolver_spec.ts

@@ -126,6 +126,7 @@ export function main() {
         outputs: [],
         host: {},
         queries: {},
+        guards: {},
         exportAs: undefined,
         providers: undefined
       }));
@@ -154,6 +155,7 @@ export function main() {
         outputs: [],
         host: {},
         queries: {},
+        guards: {},
         exportAs: undefined,
         providers: undefined
       }));
@@ -164,6 +166,7 @@ export function main() {
         outputs: [],
         host: {},
         queries: {},
+        guards: {},
         exportAs: undefined,
         providers: undefined
       }));

packages/compiler/test/template_parser/template_parser_spec.ts

@@ -38,28 +38,29 @@ function createTypeMeta({reference, diDeps}: {reference: any, diDeps?: any[]}):
   return {reference: reference, diDeps: diDeps || [], lifecycleHooks: []};
 }
 
-function compileDirectiveMetadataCreate({isHost, type, isComponent, selector, exportAs,
-                                         changeDetection, inputs, outputs, host, providers,
-                                         viewProviders, queries, viewQueries, entryComponents,
-                                         template, componentViewType, rendererType}: {
-  isHost?: boolean,
-  type?: CompileTypeMetadata,
-  isComponent?: boolean,
-  selector?: string | null,
-  exportAs?: string | null,
-  changeDetection?: ChangeDetectionStrategy | null,
-  inputs?: string[],
-  outputs?: string[],
-  host?: {[key: string]: string},
-  providers?: CompileProviderMetadata[] | null,
-  viewProviders?: CompileProviderMetadata[] | null,
-  queries?: CompileQueryMetadata[] | null,
-  viewQueries?: CompileQueryMetadata[],
-  entryComponents?: CompileEntryComponentMetadata[],
-  template?: CompileTemplateMetadata,
-  componentViewType?: StaticSymbol | ProxyClass | null,
-  rendererType?: StaticSymbol | RendererType2 | null,
-}) {
+function compileDirectiveMetadataCreate(
+    {isHost, type, isComponent, selector, exportAs, changeDetection, inputs, outputs, host,
+     providers, viewProviders, queries, guards, viewQueries, entryComponents, template,
+     componentViewType, rendererType}: {
+      isHost?: boolean,
+      type?: CompileTypeMetadata,
+      isComponent?: boolean,
+      selector?: string | null,
+      exportAs?: string | null,
+      changeDetection?: ChangeDetectionStrategy | null,
+      inputs?: string[],
+      outputs?: string[],
+      host?: {[key: string]: string},
+      providers?: CompileProviderMetadata[] | null,
+      viewProviders?: CompileProviderMetadata[] | null,
+      queries?: CompileQueryMetadata[] | null,
+      guards?: {[key: string]: any},
+      viewQueries?: CompileQueryMetadata[],
+      entryComponents?: CompileEntryComponentMetadata[],
+      template?: CompileTemplateMetadata,
+      componentViewType?: StaticSymbol | ProxyClass | null,
+      rendererType?: StaticSymbol | RendererType2 | null,
+    }) {
   return CompileDirectiveMetadata.create({
     isHost: !!isHost,
     type: noUndefined(type) !,
@@ -73,6 +74,7 @@ function compileDirectiveMetadataCreate({isHost, type, isComponent, selector, ex
     providers: providers || [],
     viewProviders: viewProviders || [],
     queries: queries || [],
+    guards: guards || {},
     viewQueries: viewQueries || [],
     entryComponents: entryComponents || [],
     template: noUndefined(template) !,
@@ -390,6 +392,7 @@ export function main() {
              providers: [],
              viewProviders: [],
              queries: [],
+             guards: {},
              viewQueries: [],
              entryComponents: [],
              componentViewType: null,

packages/core/src/application_ref.ts

@@ -102,7 +102,8 @@ export function createPlatformFactory(
     parentPlatformFactory: ((extraProviders?: StaticProvider[]) => PlatformRef) | null,
     name: string, providers: StaticProvider[] = []): (extraProviders?: StaticProvider[]) =>
     PlatformRef {
-  const marker = new InjectionToken(`Platform: ${name}`);
+  const desc = `Platform: ${name}`;
+  const marker = new InjectionToken(desc);
   return (extraProviders: StaticProvider[] = []) => {
     let platform = getPlatform();
     if (!platform || platform.injector.get(ALLOW_MULTIPLE_PLATFORMS, false)) {
@@ -110,8 +111,9 @@ export function createPlatformFactory(
         parentPlatformFactory(
             providers.concat(extraProviders).concat({provide: marker, useValue: true}));
       } else {
-        createPlatform(Injector.create(
-            providers.concat(extraProviders).concat({provide: marker, useValue: true})));
+        const injectedProviders: StaticProvider[] =
+            providers.concat(extraProviders).concat({provide: marker, useValue: true});
+        createPlatform(Injector.create({providers: injectedProviders, name: desc}));
       }
     }
     return assertPlatform(marker);
@@ -224,10 +226,12 @@ export class PlatformRef {
     // pass that as parent to the NgModuleFactory.
     const ngZoneOption = options ? options.ngZone : undefined;
     const ngZone = getNgZone(ngZoneOption);
+    const providers: StaticProvider[] = [{provide: NgZone, useValue: ngZone}];
     // Attention: Don't use ApplicationRef.run here,
     // as we want to be sure that all possible constructor calls are inside `ngZone.run`!
     return ngZone.run(() => {
-      const ngZoneInjector = Injector.create([{provide: NgZone, useValue: ngZone}], this.injector);
+      const ngZoneInjector = Injector.create(
+          {providers: providers, parent: this.injector, name: moduleFactory.moduleType.name});
       const moduleRef = <InternalNgModuleRef<M>>moduleFactory.create(ngZoneInjector);
       const exceptionHandler: ErrorHandler = moduleRef.injector.get(ErrorHandler, null);
       if (!exceptionHandler) {

packages/core/src/di/injector.ts

@@ -8,12 +8,12 @@
 
 import {Type} from '../type';
 import {stringify} from '../util';
-
 import {resolveForwardRef} from './forward_ref';
 import {InjectionToken} from './injection_token';
 import {Inject, Optional, Self, SkipSelf} from './metadata';
 import {ConstructorProvider, ExistingProvider, FactoryProvider, StaticClassProvider, StaticProvider, ValueProvider} from './provider';
 
+export const SOURCE = '__source';
 const _THROW_IF_NOT_FOUND = new Object();
 export const THROW_IF_NOT_FOUND = _THROW_IF_NOT_FOUND;
 
@@ -64,6 +64,13 @@ export abstract class Injector {
    */
   abstract get(token: any, notFoundValue?: any): any;
 
+  /**
+   * @deprecated from v5 use the new signature Injector.create(options)
+   */
+  static create(providers: StaticProvider[], parent?: Injector): Injector;
+
+  static create(options: {providers: StaticProvider[], parent?: Injector, name?: string}): Injector;
+
   /**
    * Create a new Injector which is configure using `StaticProvider`s.
    *
@@ -71,8 +78,14 @@ export abstract class Injector {
    *
    * {@example core/di/ts/provider_spec.ts region='ConstructorProvider'}
    */
-  static create(providers: StaticProvider[], parent?: Injector): Injector {
-    return new StaticInjector(providers, parent);
+  static create(
+      options: StaticProvider[]|{providers: StaticProvider[], parent?: Injector, name?: string},
+      parent?: Injector): Injector {
+    if (Array.isArray(options)) {
+      return new StaticInjector(options, parent);
+    } else {
+      return new StaticInjector(options.providers, options.parent, options.name || null);
+    }
   }
 }
 
@@ -103,11 +116,14 @@ const NO_NEW_LINE = 'ɵ';
 
 export class StaticInjector implements Injector {
   readonly parent: Injector;
+  readonly source: string|null;
 
   private _records: Map<any, Record>;
 
-  constructor(providers: StaticProvider[], parent: Injector = NULL_INJECTOR) {
+  constructor(
+      providers: StaticProvider[], parent: Injector = NULL_INJECTOR, source: string|null = null) {
     this.parent = parent;
+    this.source = source;
     const records = this._records = new Map<any, Record>();
     records.set(
         Injector, <Record>{token: Injector, fn: IDENT, deps: EMPTY, value: this, useNew: false});
@@ -122,7 +138,10 @@ export class StaticInjector implements Injector {
       return tryResolveToken(token, record, this._records, this.parent, notFoundValue);
     } catch (e) {
       const tokenPath: any[] = e[NG_TEMP_TOKEN_PATH];
-      e.message = formatError('\n' + e.message, tokenPath);
+      if (token[SOURCE]) {
+        tokenPath.unshift(token[SOURCE]);
+      }
+      e.message = formatError('\n' + e.message, tokenPath, this.source);
       e[NG_TOKEN_PATH] = tokenPath;
       e[NG_TEMP_TOKEN_PATH] = null;
       throw e;
@@ -336,7 +355,7 @@ function computeDeps(provider: StaticProvider): DependencyRecord[] {
   return deps;
 }
 
-function formatError(text: string, obj: any): string {
+function formatError(text: string, obj: any, source: string | null = null): string {
   text = text && text.charAt(0) === '\n' && text.charAt(1) == NO_NEW_LINE ? text.substr(2) : text;
   let context = stringify(obj);
   if (obj instanceof Array) {
@@ -352,7 +371,7 @@ function formatError(text: string, obj: any): string {
     }
     context = `{${parts.join(', ')}}`;
   }
-  return `StaticInjectorError[${context}]: ${text.replace(NEW_LINE, '\n  ')}`;
+  return `StaticInjectorError${source ? '(' + source + ')' : ''}[${context}]: ${text.replace(NEW_LINE, '\n  ')}`;
 }
 
 function staticError(text: string, obj: any): Error {

packages/core/src/di/reflective_provider.ts

@@ -71,11 +71,13 @@ export interface ResolvedReflectiveProvider {
 }
 
 export class ResolvedReflectiveProvider_ implements ResolvedReflectiveProvider {
+  readonly resolvedFactory: ResolvedReflectiveFactory;
+
   constructor(
       public key: ReflectiveKey, public resolvedFactories: ResolvedReflectiveFactory[],
-      public multiProvider: boolean) {}
-
-  get resolvedFactory(): ResolvedReflectiveFactory { return this.resolvedFactories[0]; }
+      public multiProvider: boolean) {
+    this.resolvedFactory = this.resolvedFactories[0];
+  }
 }
 
 /**

packages/core/src/linker/component_factory_resolver.ts

@@ -66,13 +66,20 @@ export class CodegenComponentFactoryResolver implements ComponentFactoryResolver
 }
 
 export class ComponentFactoryBoundToModule<C> extends ComponentFactory<C> {
-  constructor(private factory: ComponentFactory<C>, private ngModule: NgModuleRef<any>) { super(); }
+  readonly selector: string;
+  readonly componentType: Type<any>;
+  readonly ngContentSelectors: string[];
+  readonly inputs: {propName: string, templateName: string}[];
+  readonly outputs: {propName: string, templateName: string}[];
 
-  get selector() { return this.factory.selector; }
-  get componentType() { return this.factory.componentType; }
-  get ngContentSelectors() { return this.factory.ngContentSelectors; }
-  get inputs() { return this.factory.inputs; }
-  get outputs() { return this.factory.outputs; }
+  constructor(private factory: ComponentFactory<C>, private ngModule: NgModuleRef<any>) {
+    super();
+    this.selector = factory.selector;
+    this.componentType = factory.componentType;
+    this.ngContentSelectors = factory.ngContentSelectors;
+    this.inputs = factory.inputs;
+    this.outputs = factory.outputs;
+  }
 
   create(
       injector: Injector, projectableNodes?: any[][], rootSelectorOrNode?: string|any,

packages/core/src/linker/query_list.ts

@@ -41,9 +41,9 @@ export class QueryList<T>/* implements Iterable<T> */ {
   private _results: Array<T> = [];
   public readonly changes: Observable<any> = new EventEmitter();
 
-  get length(): number { return this._results.length; }
-  get first(): T { return this._results[0]; }
-  get last(): T { return this._results[this.length - 1]; }
+  readonly length: number;
+  readonly first: T;
+  readonly last: T;
 
   /**
    * See
@@ -98,6 +98,9 @@ export class QueryList<T>/* implements Iterable<T> */ {
   reset(res: Array<T|any[]>): void {
     this._results = flatten(res);
     (this as{dirty: boolean}).dirty = false;
+    (this as{length: number}).length = this._results.length;
+    (this as{last: T}).last = this._results[this.length - 1];
+    (this as{first: T}).first = this._results[0];
   }
 
   notifyOnChanges(): void { (this.changes as EventEmitter<any>).emit(this); }

packages/core/src/reflection/platform_reflection_capabilities.ts

@@ -13,6 +13,7 @@ export interface PlatformReflectionCapabilities {
   isReflectionEnabled(): boolean;
   factory(type: Type<any>): Function;
   hasLifecycleHook(type: any, lcProperty: string): boolean;
+  guards(type: any): {[key: string]: any};
 
   /**
    * Return a list of annotations/types for constructor parameters

packages/core/src/reflection/reflection_capabilities.ts

@@ -207,6 +207,8 @@ export class ReflectionCapabilities implements PlatformReflectionCapabilities {
     return type instanceof Type && lcProperty in type.prototype;
   }
 
+  guards(type: any): {[key: string]: any} { return {}; }
+
   getter(name: string): GetterFn { return <GetterFn>new Function('o', 'return o.' + name + ';'); }
 
   setter(name: string): SetterFn {

packages/core/src/view/ng_module.ts

@@ -9,6 +9,7 @@
 import {resolveForwardRef} from '../di/forward_ref';
 import {Injector} from '../di/injector';
 import {NgModuleRef} from '../linker/ng_module_factory';
+import {stringify} from '../util';
 
 import {DepDef, DepFlags, NgModuleData, NgModuleDefinition, NgModuleProviderDef, NodeFlags} from './types';
 import {splitDepsDsl, tokenKey} from './util';
@@ -25,7 +26,7 @@ export function moduleProvideDef(
   // lowered the expression and then stopped evaluating it,
   // i.e. also didn't unwrap it.
   value = resolveForwardRef(value);
-  const depDefs = splitDepsDsl(deps);
+  const depDefs = splitDepsDsl(deps, stringify(token));
   return {
     // will bet set by the module definition
     index: -1,

packages/core/src/view/provider.ts

@@ -12,7 +12,7 @@ import {ElementRef} from '../linker/element_ref';
 import {TemplateRef} from '../linker/template_ref';
 import {ViewContainerRef} from '../linker/view_container_ref';
 import {Renderer as RendererV1, Renderer2} from '../render/api';
-
+import {stringify} from '../util';
 import {createChangeDetectorRef, createInjector, createRendererV1} from './refs';
 import {BindingDef, BindingFlags, DepDef, DepFlags, NodeDef, NodeFlags, OutputDef, OutputType, ProviderData, QueryValueType, Services, ViewData, ViewFlags, ViewState, asElementData, asProviderData, shouldCallLifecycleInitHook} from './types';
 import {calcBindingFlags, checkBinding, dispatchEvent, isComponentView, splitDepsDsl, splitMatchedQueriesDsl, tokenKey, viewParentEl} from './util';
@@ -83,7 +83,7 @@ export function _def(
   // i.e. also didn't unwrap it.
   value = resolveForwardRef(value);
 
-  const depDefs = splitDepsDsl(deps);
+  const depDefs = splitDepsDsl(deps, stringify(token));
 
   return {
     // will bet set by the view definition

packages/core/src/view/refs.ts

@@ -481,6 +481,8 @@ class NgModuleRef_ implements NgModuleData, InternalNgModuleRef<any> {
   /** @internal */
   _providers: any[];
 
+  readonly injector: Injector = this;
+
   constructor(
       private _moduleType: Type<any>, public _parent: Injector,
       public _bootstrapComponents: Type<any>[], public _def: NgModuleDefinition) {
@@ -496,8 +498,6 @@ class NgModuleRef_ implements NgModuleData, InternalNgModuleRef<any> {
 
   get componentFactoryResolver() { return this.get(ComponentFactoryResolver); }
 
-  get injector(): Injector { return this; }
-
   destroy(): void {
     if (this._destroyed) {
       throw new Error(

packages/core/src/view/services.ts

@@ -649,9 +649,8 @@ class DebugRendererFactory2 implements RendererFactory2 {
 
 
 class DebugRenderer2 implements Renderer2 {
-  constructor(private delegate: Renderer2) {}
-
-  get data() { return this.delegate.data; }
+  readonly data: {[key: string]: any};
+  constructor(private delegate: Renderer2) { this.data = this.delegate.data; }
 
   destroyNode(node: any) {
     removeDebugNodeFromIndex(getDebugNode(node) !);

packages/core/src/view/util.ts

@@ -7,10 +7,10 @@
  */
 
 import {WrappedValue, devModeEqual} from '../change_detection/change_detection';
+import {SOURCE} from '../di/injector';
 import {ViewEncapsulation} from '../metadata/view';
 import {RendererType2} from '../render/api';
 import {looseIdentical, stringify} from '../util';
-
 import {expressionChangedAfterItHasBeenCheckedError} from './errors';
 import {BindingDef, BindingFlags, Definition, DefinitionFactory, DepDef, DepFlags, ElementData, NodeDef, NodeFlags, QueryValueType, Services, ViewData, ViewDefinition, ViewDefinitionFactory, ViewFlags, ViewState, asElementData, asTextData} from './types';
 
@@ -209,7 +209,7 @@ export function splitMatchedQueriesDsl(
   return {matchedQueries, references, matchedQueryIds};
 }
 
-export function splitDepsDsl(deps: ([DepFlags, any] | any)[]): DepDef[] {
+export function splitDepsDsl(deps: ([DepFlags, any] | any)[], sourceName?: string): DepDef[] {
   return deps.map(value => {
     let token: any;
     let flags: DepFlags;
@@ -219,6 +219,9 @@ export function splitDepsDsl(deps: ([DepFlags, any] | any)[]): DepDef[] {
       flags = DepFlags.None;
       token = value;
     }
+    if (token && (typeof token === 'function' || typeof token === 'object') && sourceName) {
+      Object.defineProperty(token, SOURCE, {value: sourceName, configurable: true});
+    }
     return {flags, token, tokenKey: tokenKey(token)};
   });
 }

packages/core/test/animation/animation_integration_spec.ts

@@ -255,6 +255,45 @@ export function main() {
         ]);
       });
 
+      it('should allow a transition to use a function to determine what method to run', () => {
+        let valueToMatch = '';
+        const transitionFn =
+            (fromState: string, toState: string) => { return toState == valueToMatch; };
+
+        @Component({
+          selector: 'if-cmp',
+          template: '<div [@myAnimation]="exp"></div>',
+          animations: [
+            trigger('myAnimation', [transition(
+                                       transitionFn,
+                                       [style({opacity: 0}), animate(1234, style({opacity: 1}))])]),
+          ]
+        })
+        class Cmp {
+          exp: any = '';
+        }
+
+        TestBed.configureTestingModule({declarations: [Cmp]});
+
+        const fixture = TestBed.createComponent(Cmp);
+        const cmp = fixture.componentInstance;
+        valueToMatch = cmp.exp = 'something';
+        fixture.detectChanges();
+
+        let players = getLog();
+        expect(players.length).toEqual(1);
+        let [p1] = players;
+        expect(p1.totalTime).toEqual(1234);
+        resetLog();
+
+        valueToMatch = 'something-else';
+        cmp.exp = 'this-wont-match';
+        fixture.detectChanges();
+
+        players = getLog();
+        expect(players.length).toEqual(0);
+      });
+
       it('should allow a state value to be `0`', () => {
         @Component({
           selector: 'if-cmp',

packages/core/test/view/provider_spec.ts

@@ -147,8 +147,8 @@ export function main() {
 
           expect(() => createAndGetRootNodes(compViewDef(rootElNodes)))
               .toThrowError(
-                  'StaticInjectorError[Dep]: \n' +
-                  '  StaticInjectorError[Dep]: \n' +
+                  'StaticInjectorError(DynamicTestModule)[SomeService -> Dep]: \n' +
+                  '  StaticInjectorError(Platform: core)[SomeService -> Dep]: \n' +
                   '    NullInjectorError: No provider for Dep!');
 
           const nonRootElNodes = [
@@ -161,8 +161,8 @@ export function main() {
 
           expect(() => createAndGetRootNodes(compViewDef(nonRootElNodes)))
               .toThrowError(
-                  'StaticInjectorError[Dep]: \n' +
-                  '  StaticInjectorError[Dep]: \n' +
+                  'StaticInjectorError(DynamicTestModule)[SomeService -> Dep]: \n' +
+                  '  StaticInjectorError(Platform: core)[SomeService -> Dep]: \n' +
                   '    NullInjectorError: No provider for Dep!');
         });
 
@@ -186,8 +186,8 @@ export function main() {
                    directiveDef(1, NodeFlags.None, null, 0, SomeService, ['nonExistingDep'])
                  ])))
               .toThrowError(
-                  'StaticInjectorError[nonExistingDep]: \n' +
-                  '  StaticInjectorError[nonExistingDep]: \n' +
+                  'StaticInjectorError(DynamicTestModule)[nonExistingDep]: \n' +
+                  '  StaticInjectorError(Platform: core)[nonExistingDep]: \n' +
                   '    NullInjectorError: No provider for nonExistingDep!');
         });
 

packages/core/testing/src/test_bed.ts

@@ -355,8 +355,12 @@ export class TestBed implements Injector {
     }
 
     const ngZone = new NgZone({enableLongStackTrace: true});
-    const ngZoneInjector =
-        Injector.create([{provide: NgZone, useValue: ngZone}], this.platform.injector);
+    const providers: StaticProvider[] = [{provide: NgZone, useValue: ngZone}];
+    const ngZoneInjector = Injector.create({
+      providers: providers,
+      parent: this.platform.injector,
+      name: this._moduleFactory.moduleType.name
+    });
     this._moduleRef = this._moduleFactory.create(ngZoneInjector);
     // ApplicationInitStatus.runInitializers() is marked @internal to core. So casting to any
     // before accessing it.

packages/examples/core/di/ts/provider_spec.ts

@@ -135,7 +135,7 @@ export function main() {
           name = 'square';
         }
 
-        const injector = Injector.create([{provide: Square, deps: []}]);
+        const injector = Injector.create({providers: [{provide: Square, deps: []}]});
 
         const shape: Square = injector.get(Square);
         expect(shape.name).toEqual('square');

packages/forms/src/directives/default_value_accessor.ts

@@ -49,10 +49,10 @@ export const COMPOSITION_BUFFER_MODE = new InjectionToken<boolean>('CompositionE
   // https://github.com/angular/angular/issues/3011 is implemented
   // selector: '[ngModel],[formControl],[formControlName]',
   host: {
-    '(input)': '_handleInput($event.target.value)',
+    '(input)': '$any(this)._handleInput($event.target.value)',
     '(blur)': 'onTouched()',
-    '(compositionstart)': '_compositionStart()',
-    '(compositionend)': '_compositionEnd($event.target.value)'
+    '(compositionstart)': '$any(this)._compositionStart()',
+    '(compositionend)': '$any(this)._compositionEnd($event.target.value)'
   },
   providers: [DEFAULT_VALUE_ACCESSOR]
 })

packages/forms/src/model.ts

@@ -253,7 +253,7 @@ export abstract class AbstractControl {
    * Sets the async validators that are active on this control. Calling this
    * will overwrite any existing async validators.
    */
-  setAsyncValidators(newValidator: AsyncValidatorFn|AsyncValidatorFn[]): void {
+  setAsyncValidators(newValidator: AsyncValidatorFn|AsyncValidatorFn[]|null): void {
     this.asyncValidator = coerceToAsyncValidator(newValidator);
   }
 

packages/platform-browser-dynamic/src/compiler_reflector.ts

@@ -42,6 +42,7 @@ export class JitReflector implements CompileReflector {
   hasLifecycleHook(type: any, lcProperty: string): boolean {
     return this.reflectionCapabilities.hasLifecycleHook(type, lcProperty);
   }
+  guards(type: any): {[key: string]: any} { return this.reflectionCapabilities.guards(type); }
   resolveExternalReference(ref: ExternalReference): any {
     return builtinExternalReferences.get(ref) || ref.runtime;
   }

packages/platform-browser/test/browser/bootstrap_spec.ts

@@ -7,12 +7,12 @@
  */
 
 import {isPlatformBrowser} from '@angular/common';
-import {APP_INITIALIZER, CUSTOM_ELEMENTS_SCHEMA, Compiler, Component, Directive, ErrorHandler, Inject, Input, LOCALE_ID, NgModule, OnDestroy, PLATFORM_ID, PLATFORM_INITIALIZER, Pipe, Provider, StaticProvider, VERSION, createPlatformFactory, ɵstringify as stringify} from '@angular/core';
+import {APP_INITIALIZER, CUSTOM_ELEMENTS_SCHEMA, Compiler, Component, Directive, ErrorHandler, Inject, Input, LOCALE_ID, NgModule, OnDestroy, PLATFORM_ID, PLATFORM_INITIALIZER, Pipe, Provider, StaticProvider, Type, VERSION, createPlatformFactory} from '@angular/core';
 import {ApplicationRef, destroyPlatform} from '@angular/core/src/application_ref';
 import {Console} from '@angular/core/src/console';
 import {ComponentRef} from '@angular/core/src/linker/component_factory';
 import {Testability, TestabilityRegistry} from '@angular/core/src/testability/testability';
-import {AsyncTestCompleter, Log, afterEach, beforeEach, beforeEachProviders, ddescribe, describe, iit, inject, it} from '@angular/core/testing/src/testing_internal';
+import {AsyncTestCompleter, Log, afterEach, beforeEach, beforeEachProviders, describe, iit, inject, it} from '@angular/core/testing/src/testing_internal';
 import {BrowserModule} from '@angular/platform-browser';
 import {platformBrowserDynamic} from '@angular/platform-browser-dynamic';
 import {getDOM} from '@angular/platform-browser/src/dom/dom_adapter';
@@ -112,10 +112,11 @@ class DummyConsole implements Console {
 
 
 class TestModule {}
-function bootstrap(cmpType: any, providers: Provider[] = [], platformProviders: StaticProvider[] = [
-]): Promise<any> {
+function bootstrap(
+    cmpType: any, providers: Provider[] = [], platformProviders: StaticProvider[] = [],
+    imports: Type<any>[] = []): Promise<any> {
   @NgModule({
-    imports: [BrowserModule],
+    imports: [BrowserModule, ...imports],
     declarations: [cmpType],
     bootstrap: [cmpType],
     providers: providers,
@@ -183,6 +184,40 @@ export function main() {
          });
        }));
 
+    it('should throw if no provider', inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {
+         const logger = new MockConsole();
+         const errorHandler = new ErrorHandler();
+         errorHandler._console = logger as any;
+
+         class IDontExist {}
+
+         @Component({selector: 'cmp', template: 'Cmp'})
+         class CustomCmp {
+           constructor(iDontExist: IDontExist) {}
+         }
+
+         @Component({
+           selector: 'hello-app',
+           template: '<cmp></cmp>',
+         })
+         class RootCmp {
+         }
+
+         @NgModule({declarations: [CustomCmp], exports: [CustomCmp]})
+         class CustomModule {
+         }
+
+         bootstrap(RootCmp, [{provide: ErrorHandler, useValue: errorHandler}], [], [
+           CustomModule
+         ]).then(null, (e: Error) => {
+           expect(e.message).toContain(`StaticInjectorError(TestModule)[CustomCmp -> IDontExist]: 
+  StaticInjectorError(Platform: core)[CustomCmp -> IDontExist]: 
+    NullInjectorError: No provider for IDontExist!`);
+           async.done();
+           return null;
+         });
+       }));
+
     if (getDOM().supportsDOMEvents()) {
       it('should forward the error to promise when bootstrap fails',
          inject([AsyncTestCompleter], (async: AsyncTestCompleter) => {

packages/router/src/pre_activation.ts

@@ -21,13 +21,15 @@ import {reduce} from 'rxjs/operator/reduce';
 import {LoadedRouterConfig, ResolveData, RunGuardsAndResolvers} from './config';
 import {ActivationStart, ChildActivationStart, Event} from './events';
 import {ChildrenOutletContexts, OutletContext} from './router_outlet_context';
-import {ActivatedRouteSnapshot, RouterStateSnapshot, equalParamsAndUrlSegments, inheritedParamsDataResolve} from './router_state';
+import {ActivatedRouteSnapshot, ParamsInheritanceStrategy, RouterStateSnapshot, equalParamsAndUrlSegments, inheritedParamsDataResolve} from './router_state';
 import {andObservables, forEach, shallowEqual, wrapIntoObservable} from './utils/collection';
 import {TreeNode, nodeChildrenAsMap} from './utils/tree';
 
 class CanActivate {
-  constructor(public path: ActivatedRouteSnapshot[]) {}
-  get route(): ActivatedRouteSnapshot { return this.path[this.path.length - 1]; }
+  readonly route: ActivatedRouteSnapshot;
+  constructor(public path: ActivatedRouteSnapshot[]) {
+    this.route = this.path[this.path.length - 1];
+  }
 }
 
 class CanDeactivate {
@@ -61,11 +63,11 @@ export class PreActivation {
         (canDeactivate: boolean) => canDeactivate ? this.runCanActivateChecks() : of (false));
   }
 
-  resolveData(): Observable<any> {
+  resolveData(paramsInheritanceStrategy: ParamsInheritanceStrategy): Observable<any> {
     if (!this.isActivating()) return of (null);
     const checks$ = from(this.canActivateChecks);
-    const runningChecks$ =
-        concatMap.call(checks$, (check: CanActivate) => this.runResolve(check.route));
+    const runningChecks$ = concatMap.call(
+        checks$, (check: CanActivate) => this.runResolve(check.route, paramsInheritanceStrategy));
     return reduce.call(runningChecks$, (_: any, __: any) => _);
   }
 
@@ -304,11 +306,14 @@ export class PreActivation {
     return every.call(canDeactivate$, (result: any) => result === true);
   }
 
-  private runResolve(future: ActivatedRouteSnapshot): Observable<any> {
+  private runResolve(
+      future: ActivatedRouteSnapshot,
+      paramsInheritanceStrategy: ParamsInheritanceStrategy): Observable<any> {
     const resolve = future._resolve;
     return map.call(this.resolveNode(resolve, future), (resolvedData: any): any => {
       future._resolvedData = resolvedData;
-      future.data = {...future.data, ...inheritedParamsDataResolve(future).resolve};
+      future.data = {...future.data,
+                     ...inheritedParamsDataResolve(future, paramsInheritanceStrategy).resolve};
       return null;
     });
   }

packages/router/src/recognize.ts

@@ -12,7 +12,7 @@ import {Observer} from 'rxjs/Observer';
 import {of } from 'rxjs/observable/of';
 
 import {Data, ResolveData, Route, Routes} from './config';
-import {ActivatedRouteSnapshot, RouterStateSnapshot, inheritedParamsDataResolve} from './router_state';
+import {ActivatedRouteSnapshot, ParamsInheritanceStrategy, RouterStateSnapshot, inheritedParamsDataResolve} from './router_state';
 import {PRIMARY_OUTLET, defaultUrlMatcher} from './shared';
 import {UrlSegment, UrlSegmentGroup, UrlTree, mapChildrenIntoArray} from './url_tree';
 import {forEach, last} from './utils/collection';
@@ -21,15 +21,17 @@ import {TreeNode} from './utils/tree';
 class NoMatch {}
 
 export function recognize(
-    rootComponentType: Type<any>| null, config: Routes, urlTree: UrlTree,
-    url: string): Observable<RouterStateSnapshot> {
-  return new Recognizer(rootComponentType, config, urlTree, url).recognize();
+    rootComponentType: Type<any>| null, config: Routes, urlTree: UrlTree, url: string,
+    paramsInheritanceStrategy: ParamsInheritanceStrategy =
+        'emptyOnly'): Observable<RouterStateSnapshot> {
+  return new Recognizer(rootComponentType, config, urlTree, url, paramsInheritanceStrategy)
+      .recognize();
 }
 
 class Recognizer {
   constructor(
       private rootComponentType: Type<any>|null, private config: Routes, private urlTree: UrlTree,
-      private url: string) {}
+      private url: string, private paramsInheritanceStrategy: ParamsInheritanceStrategy) {}
 
   recognize(): Observable<RouterStateSnapshot> {
     try {
@@ -55,7 +57,7 @@ class Recognizer {
   inheritParamsAndData(routeNode: TreeNode<ActivatedRouteSnapshot>): void {
     const route = routeNode.value;
 
-    const i = inheritedParamsDataResolve(route);
+    const i = inheritedParamsDataResolve(route, this.paramsInheritanceStrategy);
     route.params = Object.freeze(i.params);
     route.data = Object.freeze(i.data);
 

packages/router/src/router.ts

@@ -27,7 +27,7 @@ import {recognize} from './recognize';
 import {DefaultRouteReuseStrategy, DetachedRouteHandleInternal, RouteReuseStrategy} from './route_reuse_strategy';
 import {RouterConfigLoader} from './router_config_loader';
 import {ChildrenOutletContexts} from './router_outlet_context';
-import {ActivatedRoute, ActivatedRouteSnapshot, RouterState, RouterStateSnapshot, advanceActivatedRoute, createEmptyState} from './router_state';
+import {ActivatedRoute, ActivatedRouteSnapshot, RouterState, RouterStateSnapshot, advanceActivatedRoute, createEmptyState, inheritedParamsDataResolve} from './router_state';
 import {Params, isNavigationCancelingError} from './shared';
 import {DefaultUrlHandlingStrategy, UrlHandlingStrategy} from './url_handling_strategy';
 import {UrlSerializer, UrlTree, containsTree, createEmptyUrlTree} from './url_tree';
@@ -249,6 +249,16 @@ export class Router {
    */
   onSameUrlNavigation: 'reload'|'ignore' = 'ignore';
 
+  /**
+   * Defines how the router merges params, data and resolved data from parent to child
+   * routes. Available options are:
+   *
+   * - `'emptyOnly'`, the default, only inherits parent params for path-less or component-less
+   *   routes.
+   * - `'always'`, enables unconditional inheritance of parent params.
+   */
+  paramsInheritanceStrategy: 'emptyOnly'|'always' = 'emptyOnly';
+
   /**
    * Creates the router service.
    */
@@ -611,7 +621,8 @@ export class Router {
         urlAndSnapshot$ = mergeMap.call(redirectsApplied$, (appliedUrl: UrlTree) => {
           return map.call(
               recognize(
-                  this.rootComponentType, this.config, appliedUrl, this.serializeUrl(appliedUrl)),
+                  this.rootComponentType, this.config, appliedUrl, this.serializeUrl(appliedUrl),
+                  this.paramsInheritanceStrategy),
               (snapshot: any) => {
 
                 (this.events as Subject<Event>)
@@ -667,7 +678,7 @@ export class Router {
             if (p.shouldActivate && preActivation.isActivating()) {
               this.triggerEvent(
                   new ResolveStart(id, this.serializeUrl(url), p.appliedUrl, p.snapshot));
-              return map.call(preActivation.resolveData(), () => {
+              return map.call(preActivation.resolveData(this.paramsInheritanceStrategy), () => {
                 this.triggerEvent(
                     new ResolveEnd(id, this.serializeUrl(url), p.appliedUrl, p.snapshot));
                 return p;

packages/router/src/router_module.ts

@@ -278,6 +278,16 @@ export interface ExtraOptions {
    * current URL. Default is 'ignore'.
    */
   onSameUrlNavigation?: 'reload'|'ignore';
+
+  /**
+   * Defines how the router merges params, data and resolved data from parent to child
+   * routes. Available options are:
+   *
+   * - `'emptyOnly'`, the default, only inherits parent params for path-less or component-less
+   *   routes.
+   * - `'always'`, enables unconditional inheritance of parent params.
+   */
+  paramsInheritanceStrategy?: 'emptyOnly'|'always';
 }
 
 export function setupRouter(
@@ -314,6 +324,10 @@ export function setupRouter(
     router.onSameUrlNavigation = opts.onSameUrlNavigation;
   }
 
+  if (opts.paramsInheritanceStrategy) {
+    router.paramsInheritanceStrategy = opts.paramsInheritanceStrategy;
+  }
+
   return router;
 }
 

packages/router/src/router_state.ts

@@ -18,6 +18,7 @@ import {shallowEqual, shallowEqualArrays} from './utils/collection';
 import {Tree, TreeNode} from './utils/tree';
 
 
+
 /**
  * @whatItDoes Represents the state of the router.
  *
@@ -174,6 +175,9 @@ export class ActivatedRoute {
   }
 }
 
+/** @internal */
+export type ParamsInheritanceStrategy = 'emptyOnly' | 'always';
+
 /** @internal */
 export type Inherited = {
   params: Params,
@@ -181,29 +185,43 @@ export type Inherited = {
   resolve: Data,
 };
 
-/** @internal */
-export function inheritedParamsDataResolve(route: ActivatedRouteSnapshot): Inherited {
-  const pathToRoot = route.pathFromRoot;
+/**
+ * Returns the inherited params, data, and resolve for a given route.
+ * By default, this only inherits values up to the nearest path-less or component-less route.
+ * @internal
+ */
+export function inheritedParamsDataResolve(
+    route: ActivatedRouteSnapshot,
+    paramsInheritanceStrategy: ParamsInheritanceStrategy = 'emptyOnly'): Inherited {
+  const pathFromRoot = route.pathFromRoot;
 
-  let inhertingStartingFrom = pathToRoot.length - 1;
+  let inheritingStartingFrom = 0;
+  if (paramsInheritanceStrategy !== 'always') {
+    inheritingStartingFrom = pathFromRoot.length - 1;
 
-  while (inhertingStartingFrom >= 1) {
-    const current = pathToRoot[inhertingStartingFrom];
-    const parent = pathToRoot[inhertingStartingFrom - 1];
-    // current route is an empty path => inherits its parent's params and data
-    if (current.routeConfig && current.routeConfig.path === '') {
-      inhertingStartingFrom--;
+    while (inheritingStartingFrom >= 1) {
+      const current = pathFromRoot[inheritingStartingFrom];
+      const parent = pathFromRoot[inheritingStartingFrom - 1];
+      // current route is an empty path => inherits its parent's params and data
+      if (current.routeConfig && current.routeConfig.path === '') {
+        inheritingStartingFrom--;
 
-      // parent is componentless => current route should inherit its params and data
-    } else if (!parent.component) {
-      inhertingStartingFrom--;
+        // parent is componentless => current route should inherit its params and data
+      } else if (!parent.component) {
+        inheritingStartingFrom--;
 
-    } else {
-      break;
+      } else {
+        break;
+      }
     }
   }
 
-  return pathToRoot.slice(inhertingStartingFrom).reduce((res, curr) => {
+  return flattenInherited(pathFromRoot.slice(inheritingStartingFrom));
+}
+
+/** @internal */
+function flattenInherited(pathFromRoot: ActivatedRouteSnapshot[]): Inherited {
+  return pathFromRoot.reduce((res, curr) => {
     const params = {...res.params, ...curr.params};
     const data = {...res.data, ...curr.data};
     const resolve = {...res.resolve, ...curr._resolvedData};
@@ -352,7 +370,7 @@ function setRouterState<U, T extends{_routerState: U}>(state: U, node: TreeNode<
 }
 
 function serializeNode(node: TreeNode<ActivatedRouteSnapshot>): string {
-  const c = node.children.length > 0 ? ` { ${node.children.map(serializeNode).join(", ")} } ` : '';
+  const c = node.children.length > 0 ? ` { ${node.children.map(serializeNode).join(', ')} } ` : '';
   return `${node.value}${c}`;
 }
 

packages/router/test/integration.spec.ts

@@ -3794,6 +3794,19 @@ describe('Integration', () => {
   });
 });
 
+describe('Testing router options', () => {
+  describe('paramsInheritanceStrategy', () => {
+    beforeEach(() => {
+      TestBed.configureTestingModule(
+          {imports: [RouterTestingModule.withRoutes([], {paramsInheritanceStrategy: 'always'})]});
+    });
+
+    it('should configure the router', fakeAsync(inject([Router], (router: Router) => {
+         expect(router.paramsInheritanceStrategy).toEqual('always');
+       })));
+  });
+});
+
 function expectEvents(events: Event[], pairs: any[]) {
   expect(events.length).toEqual(pairs.length);
   for (let i = 0; i < events.length; ++i) {

packages/router/test/recognize.spec.ts

@@ -8,7 +8,7 @@
 
 import {Routes} from '../src/config';
 import {recognize} from '../src/recognize';
-import {ActivatedRouteSnapshot, RouterStateSnapshot} from '../src/router_state';
+import {ActivatedRouteSnapshot, ParamsInheritanceStrategy, RouterStateSnapshot, inheritedParamsDataResolve} from '../src/router_state';
 import {PRIMARY_OUTLET, Params} from '../src/shared';
 import {DefaultUrlSerializer, UrlTree} from '../src/url_tree';
 
@@ -201,7 +201,7 @@ describe('recognize', () => {
           });
     });
 
-    it('should merge componentless route\'s data', () => {
+    it('should inherit componentless route\'s data', () => {
       checkRecognize(
           [{
             path: 'a',
@@ -214,6 +214,34 @@ describe('recognize', () => {
           });
     });
 
+    it('should not inherit route\'s data if it has component', () => {
+      checkRecognize(
+          [{
+            path: 'a',
+            component: ComponentA,
+            data: {one: 1},
+            children: [{path: 'b', data: {two: 2}, component: ComponentB}]
+          }],
+          'a/b', (s: RouterStateSnapshot) => {
+            const r: ActivatedRouteSnapshot = s.firstChild(<any>s.firstChild(s.root)) !;
+            expect(r.data).toEqual({two: 2});
+          });
+    });
+
+    it('should inherit route\'s data if paramsInheritanceStrategy is \'always\'', () => {
+      checkRecognize(
+          [{
+            path: 'a',
+            component: ComponentA,
+            data: {one: 1},
+            children: [{path: 'b', data: {two: 2}, component: ComponentB}]
+          }],
+          'a/b', (s: RouterStateSnapshot) => {
+            const r: ActivatedRouteSnapshot = s.firstChild(<any>s.firstChild(s.root)) !;
+            expect(r.data).toEqual({one: 1, two: 2});
+          }, 'always');
+    });
+
     it('should set resolved data', () => {
       checkRecognize(
           [{path: 'a', resolve: {one: 'some-token'}, component: ComponentA}], 'a',
@@ -307,7 +335,7 @@ describe('recognize', () => {
             });
       });
 
-      it('should match (non-termianl) when both primary and secondary and primary has a child',
+      it('should match (non-terminal) when both primary and secondary and primary has a child',
          () => {
            const config = [{
              path: 'parent',
@@ -579,7 +607,7 @@ describe('recognize', () => {
           });
     });
 
-    it('should merge params until encounters a normal route', () => {
+    it('should inherit params until encounters a normal route', () => {
       checkRecognize(
           [{
             path: 'p/:id',
@@ -606,6 +634,25 @@ describe('recognize', () => {
             checkActivatedRoute(c, 'c', {}, ComponentC);
           });
     });
+
+    it('should inherit all params if paramsInheritanceStrategy is \'always\'', () => {
+      checkRecognize(
+          [{
+            path: 'p/:id',
+            children: [{
+              path: 'a/:name',
+              children: [{
+                path: 'b',
+                component: ComponentB,
+                children: [{path: 'c', component: ComponentC}]
+              }]
+            }]
+          }],
+          'p/11/a/victor/b/c', (s: RouterStateSnapshot) => {
+            const c = s.firstChild(s.firstChild(s.firstChild(s.firstChild(s.root) !) !) !) !;
+            checkActivatedRoute(c, 'c', {id: '11', name: 'victor'}, ComponentC);
+          }, 'always');
+    });
   });
 
   describe('empty URL leftovers', () => {
@@ -722,8 +769,11 @@ describe('recognize', () => {
   });
 });
 
-function checkRecognize(config: Routes, url: string, callback: any): void {
-  recognize(RootComponent, config, tree(url), url).subscribe(callback, e => { throw e; });
+function checkRecognize(
+    config: Routes, url: string, callback: any,
+    paramsInheritanceStrategy?: ParamsInheritanceStrategy): void {
+  recognize(RootComponent, config, tree(url), url, paramsInheritanceStrategy)
+      .subscribe(callback, e => { throw e; });
 }
 
 function checkActivatedRoute(

packages/router/test/router.spec.ts

@@ -498,7 +498,7 @@ function checkResolveData(
     future: RouterStateSnapshot, curr: RouterStateSnapshot, injector: any, check: any): void {
   const p = new PreActivation(future, curr, injector);
   p.initialize(new ChildrenOutletContexts());
-  p.resolveData().subscribe(check, (e) => { throw e; });
+  p.resolveData('emptyOnly').subscribe(check, (e) => { throw e; });
 }
 
 function checkGuards(

packages/router/testing/src/router_testing_module.ts

@@ -9,7 +9,7 @@
 import {Location, LocationStrategy} from '@angular/common';
 import {MockLocationStrategy, SpyLocation} from '@angular/common/testing';
 import {Compiler, Injectable, Injector, ModuleWithProviders, NgModule, NgModuleFactory, NgModuleFactoryLoader, Optional} from '@angular/core';
-import {ChildrenOutletContexts, NoPreloading, PreloadingStrategy, ROUTES, Route, Router, RouterModule, Routes, UrlHandlingStrategy, UrlSerializer, provideRoutes, ɵROUTER_PROVIDERS as ROUTER_PROVIDERS, ɵflatten as flatten} from '@angular/router';
+import {ChildrenOutletContexts, ExtraOptions, NoPreloading, PreloadingStrategy, ROUTER_CONFIGURATION, ROUTES, Route, Router, RouterModule, Routes, UrlHandlingStrategy, UrlSerializer, provideRoutes, ɵROUTER_PROVIDERS as ROUTER_PROVIDERS, ɵflatten as flatten} from '@angular/router';
 
 
 
@@ -76,6 +76,13 @@ export class SpyNgModuleFactoryLoader implements NgModuleFactoryLoader {
   }
 }
 
+function isUrlHandlingStrategy(opts: ExtraOptions | UrlHandlingStrategy):
+    opts is UrlHandlingStrategy {
+  // This property check is needed because UrlHandlingStrategy is an interface and doesn't exist at
+  // runtime.
+  return 'shouldProcessUrl' in opts;
+}
+
 /**
  * Router setup factory function used for testing.
  *
@@ -84,9 +91,39 @@ export class SpyNgModuleFactoryLoader implements NgModuleFactoryLoader {
 export function setupTestingRouter(
     urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location,
     loader: NgModuleFactoryLoader, compiler: Compiler, injector: Injector, routes: Route[][],
-    urlHandlingStrategy?: UrlHandlingStrategy) {
+    opts?: ExtraOptions, urlHandlingStrategy?: UrlHandlingStrategy): Router;
+
+/**
+ * Router setup factory function used for testing.
+ *
+ * @deprecated As of v5.2. The 2nd-to-last argument should be `ExtraOptions`, not
+ * `UrlHandlingStrategy`
+ */
+export function setupTestingRouter(
+    urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location,
+    loader: NgModuleFactoryLoader, compiler: Compiler, injector: Injector, routes: Route[][],
+    urlHandlingStrategy?: UrlHandlingStrategy): Router;
+
+/**
+ * Router setup factory function used for testing.
+ *
+ * @stable
+ */
+export function setupTestingRouter(
+    urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location,
+    loader: NgModuleFactoryLoader, compiler: Compiler, injector: Injector, routes: Route[][],
+    opts?: ExtraOptions | UrlHandlingStrategy, urlHandlingStrategy?: UrlHandlingStrategy) {
   const router = new Router(
       null !, urlSerializer, contexts, location, injector, loader, compiler, flatten(routes));
+  // Handle deprecated argument ordering.
+  if (opts) {
+    if (isUrlHandlingStrategy(opts)) {
+      router.urlHandlingStrategy = opts;
+    } else if (opts.paramsInheritanceStrategy) {
+      router.paramsInheritanceStrategy = opts.paramsInheritanceStrategy;
+    }
+  }
+
   if (urlHandlingStrategy) {
     router.urlHandlingStrategy = urlHandlingStrategy;
   }
@@ -128,14 +165,20 @@ export function setupTestingRouter(
       useFactory: setupTestingRouter,
       deps: [
         UrlSerializer, ChildrenOutletContexts, Location, NgModuleFactoryLoader, Compiler, Injector,
-        ROUTES, [UrlHandlingStrategy, new Optional()]
+        ROUTES, ROUTER_CONFIGURATION, [UrlHandlingStrategy, new Optional()]
       ]
     },
     {provide: PreloadingStrategy, useExisting: NoPreloading}, provideRoutes([])
   ]
 })
 export class RouterTestingModule {
-  static withRoutes(routes: Routes): ModuleWithProviders {
-    return {ngModule: RouterTestingModule, providers: [provideRoutes(routes)]};
+  static withRoutes(routes: Routes, config?: ExtraOptions): ModuleWithProviders {
+    return {
+      ngModule: RouterTestingModule,
+      providers: [
+        provideRoutes(routes),
+        {provide: ROUTER_CONFIGURATION, useValue: config ? config : {}},
+      ]
+    };
   }
 }

packages/upgrade/src/common/downgrade_component_adapter.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {ApplicationRef, ChangeDetectorRef, ComponentFactory, ComponentRef, EventEmitter, Injector, OnChanges, SimpleChange, SimpleChanges, Testability, TestabilityRegistry, Type} from '@angular/core';
+import {ApplicationRef, ChangeDetectorRef, ComponentFactory, ComponentRef, EventEmitter, Injector, OnChanges, SimpleChange, SimpleChanges, StaticProvider, Testability, TestabilityRegistry, Type} from '@angular/core';
 
 import * as angular from './angular1';
 import {PropertyBinding} from './component_info';
@@ -54,8 +54,9 @@ export class DowngradeComponentAdapter {
   }
 
   createComponent(projectableNodes: Node[][]) {
-    const childInjector =
-        Injector.create([{provide: $SCOPE, useValue: this.componentScope}], this.parentInjector);
+    const providers: StaticProvider[] = [{provide: $SCOPE, useValue: this.componentScope}];
+    const childInjector = Injector.create(
+        {providers: providers, parent: this.parentInjector, name: 'DowngradeComponentAdapter'});
 
     this.componentRef =
         this.componentFactory.create(childInjector, projectableNodes, this.element[0]);

tools/public_api_guard/animations/animations.d.ts

@@ -172,7 +172,7 @@ export interface AnimationStyleMetadata extends AnimationMetadata {
 /** @experimental */
 export interface AnimationTransitionMetadata extends AnimationMetadata {
     animation: AnimationMetadata | AnimationMetadata[];
-    expr: string;
+    expr: string | ((fromState: string, toState: string) => boolean);
     options: AnimationOptions | null;
 }
 
@@ -240,7 +240,7 @@ export declare function style(tokens: '*' | {
 }>): AnimationStyleMetadata;
 
 /** @experimental */
-export declare function transition(stateChangeExpr: string, steps: AnimationMetadata | AnimationMetadata[], options?: AnimationOptions | null): AnimationTransitionMetadata;
+export declare function transition(stateChangeExpr: string | ((fromState: string, toState: string) => boolean), steps: AnimationMetadata | AnimationMetadata[], options?: AnimationOptions | null): AnimationTransitionMetadata;
 
 /** @experimental */
 export declare function trigger(name: string, definitions: AnimationMetadata[]): AnimationTriggerMetadata;

tools/public_api_guard/core/core.d.ts

@@ -476,7 +476,12 @@ export declare abstract class Injector {
     /** @deprecated */ abstract get(token: any, notFoundValue?: any): any;
     static NULL: Injector;
     static THROW_IF_NOT_FOUND: Object;
-    static create(providers: StaticProvider[], parent?: Injector): Injector;
+    /** @deprecated */ static create(providers: StaticProvider[], parent?: Injector): Injector;
+    static create(options: {
+        providers: StaticProvider[];
+        parent?: Injector;
+        name?: string;
+    }): Injector;
 }
 
 /** @stable */

tools/public_api_guard/forms/forms.d.ts

@@ -50,7 +50,7 @@ export declare abstract class AbstractControl {
     }): void;
     abstract patchValue(value: any, options?: Object): void;
     abstract reset(value?: any, options?: Object): void;
-    setAsyncValidators(newValidator: AsyncValidatorFn | AsyncValidatorFn[]): void;
+    setAsyncValidators(newValidator: AsyncValidatorFn | AsyncValidatorFn[] | null): void;
     setErrors(errors: ValidationErrors | null, opts?: {
         emitEvent?: boolean;
     }): void;

tools/public_api_guard/router/router.d.ts

@@ -127,6 +127,7 @@ export interface ExtraOptions {
     errorHandler?: ErrorHandler;
     initialNavigation?: InitialNavigation;
     onSameUrlNavigation?: 'reload' | 'ignore';
+    paramsInheritanceStrategy?: 'emptyOnly' | 'always';
     preloadingStrategy?: any;
     useHash?: boolean;
 }
@@ -329,6 +330,7 @@ export declare class Router {
     readonly events: Observable<Event>;
     navigated: boolean;
     onSameUrlNavigation: 'reload' | 'ignore';
+    paramsInheritanceStrategy: 'emptyOnly' | 'always';
     routeReuseStrategy: RouteReuseStrategy;
     readonly routerState: RouterState;
     readonly url: string;

tools/public_api_guard/router/testing.d.ts

@@ -1,10 +1,10 @@
 /** @stable */
 export declare class RouterTestingModule {
-    static withRoutes(routes: Routes): ModuleWithProviders;
+    static withRoutes(routes: Routes, config?: ExtraOptions): ModuleWithProviders;
 }
 
 /** @stable */
-export declare function setupTestingRouter(urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location, loader: NgModuleFactoryLoader, compiler: Compiler, injector: Injector, routes: Route[][], urlHandlingStrategy?: UrlHandlingStrategy): Router;
+export declare function setupTestingRouter(urlSerializer: UrlSerializer, contexts: ChildrenOutletContexts, location: Location, loader: NgModuleFactoryLoader, compiler: Compiler, injector: Injector, routes: Route[][], opts?: ExtraOptions, urlHandlingStrategy?: UrlHandlingStrategy): Router;
 
 /** @stable */
 export declare class SpyNgModuleFactoryLoader implements NgModuleFactoryLoader {