fix(tabs): avoid template type checking errors with Ivy

Along the same lines as angular#17022. Adds annotations to the various base classes that declare inputs, because the Ivy template type checker doesn't handle base defs at the moment.

Fixes angular#17121.

src/material/tabs/paginated-tab-header.ts

@@ -17,6 +17,8 @@ import {
   AfterContentInit,
   AfterViewInit,
   OnDestroy,
+  Directive,
+  Inject,
 } from '@angular/core';
 import {Direction, Directionality} from '@angular/cdk/bidi';
 import {coerceNumberProperty} from '@angular/cdk/coercion';
@@ -26,6 +28,7 @@ import {END, ENTER, HOME, SPACE, hasModifierKey} from '@angular/cdk/keycodes';
 import {merge, of as observableOf, Subject, timer, fromEvent} from 'rxjs';
 import {takeUntil} from 'rxjs/operators';
 import {Platform, normalizePassiveListenerOptions} from '@angular/cdk/platform';
+import {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';
 
 
 /** Config used to bind passive event listeners */
@@ -62,7 +65,12 @@ export type MatPaginatedTabHeaderItem = FocusableOption & {elementRef: ElementRe
 
 /**
  * Base class for a tab header that supported pagination.
+ * @docs-private
  */
+@Directive({
+  // TODO(crisbeto): this selector can be removed when we update to Angular 9.0.
+  selector: 'do-not-use-abstract-mat-paginated-tab-header'
+})
 export abstract class MatPaginatedTabHeader implements AfterContentChecked, AfterContentInit,
   AfterViewInit, OnDestroy {
   abstract _items: QueryList<MatPaginatedTabHeaderItem>;
@@ -140,7 +148,7 @@ export abstract class MatPaginatedTabHeader implements AfterContentChecked, Afte
                * parameters to become required.
                */
               private _platform?: Platform,
-              public _animationMode?: string) {
+              @Optional() @Inject(ANIMATION_MODULE_TYPE) public _animationMode?: string) {
 
     // Bind the `mouseleave` event on the outside since it doesn't change anything in the view.
     _ngZone.runOutsideAngular(() => {

src/material/tabs/public-api.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-export * from './tabs-module';
+export {MatTabsModule} from './tabs-module';
 export * from './tab-group';
 export {MatInkBar, _MatInkBarPositioner, _MAT_INK_BAR_POSITIONER} from './ink-bar';
 export {

src/material/tabs/tab-body.ts

@@ -98,7 +98,14 @@ export class MatTabBodyPortal extends CdkPortalOutlet implements OnInit, OnDestr
   }
 }
 
-/** Base class with all of the `MatTabBody` functionality. */
+/**
+ * Base class with all of the `MatTabBody` functionality.
+ * @docs-private
+ */
+@Directive({
+  // TODO(crisbeto): this selector can be removed when we update to Angular 9.0.
+  selector: 'do-not-use-abstract-mat-tab-body-base'
+})
 // tslint:disable-next-line:class-name
 export abstract class _MatTabBodyBase implements OnInit, OnDestroy {
   /** Current position of the tab-body in the tab-group. Zero means that the tab is visible. */

src/material/tabs/tab-group.ts

@@ -25,6 +25,7 @@ import {
   Optional,
   Inject,
   InjectionToken,
+  Directive,
 } from '@angular/core';
 import {
   CanColor,
@@ -76,7 +77,14 @@ interface MatTabGroupBaseHeader {
   focusIndex: number;
 }
 
-/** Base class with all of the `MatTabGroupBase` functionality. */
+/**
+ * Base class with all of the `MatTabGroupBase` functionality.
+ * @docs-private
+ */
+@Directive({
+  // TODO(crisbeto): this selector can be removed when we update to Angular 9.0.
+  selector: 'do-not-use-abstract-mat-tab-group-base'
+})
 // tslint:disable-next-line:class-name
 export abstract class _MatTabGroupBase extends _MatTabGroupMixinBase implements AfterContentInit,
     AfterContentChecked, OnDestroy, CanColor, CanDisableRipple {

src/material/tabs/tab-header.ts

@@ -25,6 +25,7 @@ import {
   AfterViewInit,
   Input,
   Inject,
+  Directive,
 } from '@angular/core';
 import {ANIMATION_MODULE_TYPE} from '@angular/platform-browser/animations';
 import {coerceBooleanProperty} from '@angular/cdk/coercion';
@@ -33,7 +34,14 @@ import {MatTabLabelWrapper} from './tab-label-wrapper';
 import {Platform} from '@angular/cdk/platform';
 import {MatPaginatedTabHeader} from './paginated-tab-header';
 
-/** Base class with all of the `MatTabHeader` functionality. */
+/**
+ * Base class with all of the `MatTabHeader` functionality.
+ * @docs-private
+ */
+@Directive({
+  // TODO(crisbeto): this selector can be removed when we update to Angular 9.0.
+  selector: 'do-not-use-abstract-mat-tab-header-base'
+})
 // tslint:disable-next-line:class-name
 export abstract class _MatTabHeaderBase extends MatPaginatedTabHeader implements
   AfterContentChecked, AfterContentInit, AfterViewInit, OnDestroy {

src/material/tabs/tab-nav-bar/tab-nav-bar.ts

@@ -48,7 +48,14 @@ import {MatInkBar} from '../ink-bar';
 import {MatPaginatedTabHeader, MatPaginatedTabHeaderItem} from '../paginated-tab-header';
 import {startWith, takeUntil} from 'rxjs/operators';
 
-/** Base class with all of the `MatTabNav` functionality. */
+/**
+ * Base class with all of the `MatTabNav` functionality.
+ * @docs-private
+ */
+@Directive({
+  // TODO(crisbeto): this selector can be removed when we update to Angular 9.0.
+  selector: 'do-not-use-abstract-mat-tab-nav-base'
+})
 // tslint:disable-next-line:class-name
 export abstract class _MatTabNavBase extends MatPaginatedTabHeader implements AfterContentChecked,
   AfterContentInit, OnDestroy {

src/material/tabs/tabs-module.ts

@@ -10,17 +10,18 @@ import {ObserversModule} from '@angular/cdk/observers';
 import {PortalModule} from '@angular/cdk/portal';
 import {CommonModule} from '@angular/common';
 import {NgModule} from '@angular/core';
+import {A11yModule} from '@angular/cdk/a11y';
 import {MatCommonModule, MatRippleModule} from '@angular/material/core';
 import {MatInkBar} from './ink-bar';
 import {MatTab} from './tab';
-import {MatTabBody, MatTabBodyPortal} from './tab-body';
+import {MatTabBody, MatTabBodyPortal, _MatTabBodyBase} from './tab-body';
 import {MatTabContent} from './tab-content';
-import {MatTabGroup} from './tab-group';
-import {MatTabHeader} from './tab-header';
+import {MatTabGroup, _MatTabGroupBase} from './tab-group';
+import {MatTabHeader, _MatTabHeaderBase} from './tab-header';
 import {MatTabLabel} from './tab-label';
 import {MatTabLabelWrapper} from './tab-label-wrapper';
-import {MatTabLink, MatTabNav} from './tab-nav-bar/tab-nav-bar';
-import {A11yModule} from '@angular/cdk/a11y';
+import {MatTabLink, MatTabNav, _MatTabNavBase} from './tab-nav-bar/tab-nav-bar';
+import {MatPaginatedTabHeader} from './paginated-tab-header';
 
 
 @NgModule({
@@ -54,6 +55,13 @@ import {A11yModule} from '@angular/cdk/a11y';
     MatTabBodyPortal,
     MatTabHeader,
     MatTabContent,
+
+    // TODO(crisbeto): these can be removed once they're turned into selector-less directives.
+    MatPaginatedTabHeader as any,
+    _MatTabGroupBase as any,
+    _MatTabNavBase as any,
+    _MatTabBodyBase as any,
+    _MatTabHeaderBase as any,
   ],
 })
 export class MatTabsModule {}