refactor(ivy): remove ngBaseDef (#33264)

Removes `ngBaseDef` from the compiler and any runtime code that was still referring to it. In the cases where we'd previously generate a base def we now generate a definition for an abstract directive.

PR Close #33264

integration/ngcc/test.sh

@@ -95,12 +95,12 @@ assertSucceeded "Expected 'ngcc' to log 'Compiling'."
   assertSucceeded "Expected 'ngcc' to generate a base factory for 'MatTable' in '@angular/material' (esm5)."
 
 
-# Did it generate a base definition for undecorated classes with inputs and view queries?
+# Did it generate an abstract directive definition for undecorated classes with inputs and view queries?
-  grep "_MatMenuBase.ngBaseDef = ɵngcc0.ɵɵdefineBase({ inputs: {" node_modules/@angular/material/esm2015/menu.js
+  grep "_MatMenuBase.ɵdir = ɵngcc0.ɵɵdefineDirective({ type: _MatMenuBase" node_modules/@angular/material/esm2015/menu.js
-  assertSucceeded "Expected 'ngcc' to generate a base definition for 'MatMenuBase' in '@angular/material' (esm2015)."
+  assertSucceeded "Expected 'ngcc' to generate an abstract directive definition for 'MatMenuBase' in '@angular/material' (esm2015)."
 
-  grep "_MatMenuBase.ngBaseDef = ɵngcc0.ɵɵdefineBase({ inputs: {" node_modules/@angular/material/esm5/menu.es5.js
+  grep "_MatMenuBase.ɵdir = ɵngcc0.ɵɵdefineDirective({ type: _MatMenuBase" node_modules/@angular/material/esm5/menu.es5.js
-  assertSucceeded "Expected 'ngcc' to generate a base definition for 'MatMenuBase' in '@angular/material' (esm5)."
+  assertSucceeded "Expected 'ngcc' to generate an abstract directive definition for 'MatMenuBase' in '@angular/material' (esm5)."
 
 
 # Did it handle namespace imported decorators in UMD using `__decorate` syntax?

packages/compiler-cli/ngcc/src/analysis/decoration_analyzer.ts

@@ -7,8 +7,7 @@
  */
 import {ConstantPool} from '@angular/compiler';
 import * as ts from 'typescript';
-
+import {ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, PipeDecoratorHandler, ReferencesRegistry, ResourceLoader} from '../../../src/ngtsc/annotations';
-import {BaseDefDecoratorHandler, ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, PipeDecoratorHandler, ReferencesRegistry, ResourceLoader} from '../../../src/ngtsc/annotations';
 import {CycleAnalyzer, ImportGraph} from '../../../src/ngtsc/cycles';
 import {isFatalDiagnosticError} from '../../../src/ngtsc/diagnostics';
 import {FileSystem, LogicalFileSystem, absoluteFrom, dirname, resolve} from '../../../src/ngtsc/file_system';
@@ -85,7 +84,6 @@ export class DecorationAnalyzer {
   importGraph = new ImportGraph(this.moduleResolver);
   cycleAnalyzer = new CycleAnalyzer(this.importGraph);
   handlers: DecoratorHandler<any, any>[] = [
-    new BaseDefDecoratorHandler(this.reflectionHost, this.evaluator, this.isCore),
     new ComponentDecoratorHandler(
         this.reflectionHost, this.evaluator, this.fullRegistry, this.fullMetaReader,
         this.scopeRegistry, this.scopeRegistry, this.isCore, this.resourceManager, this.rootDirs,

packages/compiler-cli/ngcc/test/rendering/renderer_spec.ts

@@ -284,7 +284,7 @@ A.ɵdir = ɵngcc0.ɵɵdefineDirective({ type: A, selectors: [["", "a", ""]] });
               .toBeGreaterThan(ngInjectorDef, 'setClassMetadata should follow ɵinj');
         });
 
-        it('should render classes without decorators if handler matches', () => {
+        it('should render classes without decorators if class fields are decorated', () => {
           const {renderer, decorationAnalyses, switchMarkerAnalyses, privateDeclarationsAnalyses,
                  testFormatter} =
               createTestRenderer('test-package', [{
@@ -309,7 +309,8 @@ A.ɵdir = ɵngcc0.ɵɵdefineDirective({ type: A, selectors: [["", "a", ""]] });
           const addDefinitionsSpy = testFormatter.addDefinitions as jasmine.Spy;
           expect(addDefinitionsSpy.calls.first().args[2])
               .toEqual(
-                  `UndecoratedBase.ngBaseDef = ɵngcc0.ɵɵdefineBase({ viewQuery: function (rf, ctx) { if (rf & 1) {
+                  `UndecoratedBase.ɵfac = function UndecoratedBase_Factory(t) { return new (t || UndecoratedBase)(); };
+UndecoratedBase.ɵdir = ɵngcc0.ɵɵdefineDirective({ type: UndecoratedBase, selectors: [], viewQuery: function UndecoratedBase_Query(rf, ctx) { if (rf & 1) {
         ɵngcc0.ɵɵstaticViewQuery(_c0, true);
     } if (rf & 2) {
         var _t;

packages/compiler-cli/src/ngtsc/annotations/index.ts

@@ -9,7 +9,6 @@
 /// <reference types="node" />
 
 export {ResourceLoader} from './src/api';
-export {BaseDefDecoratorHandler} from './src/base_def';
 export {ComponentDecoratorHandler} from './src/component';
 export {DirectiveDecoratorHandler} from './src/directive';
 export {InjectableDecoratorHandler} from './src/injectable';

packages/compiler-cli/src/ngtsc/annotations/src/base_def.ts

@@ -1,173 +0,0 @@
-/**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- */
-
-import {ConstantPool, EMPTY_SOURCE_SPAN, R3BaseRefMetaData, WrappedNodeExpr, compileBaseDefFromMetadata, makeBindingParser} from '@angular/compiler';
-
-import {PartialEvaluator} from '../../partial_evaluator';
-import {ClassDeclaration, ClassMember, Decorator, ReflectionHost} from '../../reflection';
-import {AnalysisOutput, CompileResult, DecoratorHandler, DetectResult, HandlerPrecedence} from '../../transform';
-
-import {extractHostBindings, queriesFromFields} from './directive';
-import {isAngularDecorator} from './util';
-
-function containsNgTopLevelDecorator(decorators: Decorator[] | null, isCore: boolean): boolean {
-  if (!decorators) {
-    return false;
-  }
-  return decorators.some(
-      decorator => isAngularDecorator(decorator, 'Component', isCore) ||
-          isAngularDecorator(decorator, 'Directive', isCore) ||
-          isAngularDecorator(decorator, 'NgModule', isCore));
-}
-
-export class BaseDefDecoratorHandler implements
-    DecoratorHandler<R3BaseRefMetaData, R3BaseRefDecoratorDetection> {
-  constructor(
-      private reflector: ReflectionHost, private evaluator: PartialEvaluator,
-      private isCore: boolean) {}
-
-  readonly precedence = HandlerPrecedence.WEAK;
-
-  detect(node: ClassDeclaration, decorators: Decorator[]|null):
-      DetectResult<R3BaseRefDecoratorDetection>|undefined {
-    if (containsNgTopLevelDecorator(decorators, this.isCore)) {
-      // If the class is already decorated by @Component or @Directive let that
-      // DecoratorHandler handle this. BaseDef is unnecessary.
-      return undefined;
-    }
-
-    let result: R3BaseRefDecoratorDetection|undefined = undefined;
-
-    this.reflector.getMembersOfClass(node).forEach(property => {
-      const {decorators} = property;
-      if (!decorators) {
-        return;
-      }
-      for (const decorator of decorators) {
-        if (isAngularDecorator(decorator, 'Input', this.isCore)) {
-          result = result || {};
-          const inputs = result.inputs = result.inputs || [];
-          inputs.push({decorator, property});
-        } else if (isAngularDecorator(decorator, 'Output', this.isCore)) {
-          result = result || {};
-          const outputs = result.outputs = result.outputs || [];
-          outputs.push({decorator, property});
-        } else if (
-            isAngularDecorator(decorator, 'ViewChild', this.isCore) ||
-            isAngularDecorator(decorator, 'ViewChildren', this.isCore)) {
-          result = result || {};
-          const viewQueries = result.viewQueries = result.viewQueries || [];
-          viewQueries.push({member: property, decorators});
-        } else if (
-            isAngularDecorator(decorator, 'ContentChild', this.isCore) ||
-            isAngularDecorator(decorator, 'ContentChildren', this.isCore)) {
-          result = result || {};
-          const queries = result.queries = result.queries || [];
-          queries.push({member: property, decorators});
-        } else if (
-            isAngularDecorator(decorator, 'HostBinding', this.isCore) ||
-            isAngularDecorator(decorator, 'HostListener', this.isCore)) {
-          result = result || {};
-          const host = result.host = result.host || [];
-          host.push(property);
-        }
-      }
-    });
-
-    if (result !== undefined) {
-      return {
-        metadata: result,
-        trigger: null,
-      };
-    } else {
-      return undefined;
-    }
-  }
-
-  analyze(node: ClassDeclaration, metadata: R3BaseRefDecoratorDetection):
-      AnalysisOutput<R3BaseRefMetaData> {
-    const analysis: R3BaseRefMetaData = {
-      name: node.name.text,
-      type: new WrappedNodeExpr(node.name),
-      typeSourceSpan: EMPTY_SOURCE_SPAN,
-    };
-
-    if (metadata.inputs) {
-      const inputs = analysis.inputs = {} as{[key: string]: string | [string, string]};
-      metadata.inputs.forEach(({decorator, property}) => {
-        const propName = property.name;
-        const args = decorator.args;
-        let value: string|[string, string];
-        if (args && args.length > 0) {
-          const resolvedValue = this.evaluator.evaluate(args[0]);
-          if (typeof resolvedValue !== 'string') {
-            throw new TypeError('Input alias does not resolve to a string value');
-          }
-          value = [resolvedValue, propName];
-        } else {
-          value = propName;
-        }
-        inputs[propName] = value;
-      });
-    }
-
-    if (metadata.outputs) {
-      const outputs = analysis.outputs = {} as{[key: string]: string};
-      metadata.outputs.forEach(({decorator, property}) => {
-        const propName = property.name;
-        const args = decorator.args;
-        let value: string;
-        if (args && args.length > 0) {
-          const resolvedValue = this.evaluator.evaluate(args[0]);
-          if (typeof resolvedValue !== 'string') {
-            throw new TypeError('Output alias does not resolve to a string value');
-          }
-          value = resolvedValue;
-        } else {
-          value = propName;
-        }
-        outputs[propName] = value;
-      });
-    }
-
-    if (metadata.viewQueries) {
-      analysis.viewQueries =
-          queriesFromFields(metadata.viewQueries, this.reflector, this.evaluator);
-    }
-
-    if (metadata.queries) {
-      analysis.queries = queriesFromFields(metadata.queries, this.reflector, this.evaluator);
-    }
-
-    if (metadata.host) {
-      analysis.host = extractHostBindings(
-          metadata.host, this.evaluator, this.isCore ? undefined : '@angular/core');
-    }
-
-    return {analysis};
-  }
-
-  compile(node: ClassDeclaration, analysis: R3BaseRefMetaData, pool: ConstantPool):
-      CompileResult[]|CompileResult {
-    const {expression, type} = compileBaseDefFromMetadata(analysis, pool, makeBindingParser());
-
-    return {
-      name: 'ngBaseDef',
-      initializer: expression, type,
-      statements: [],
-    };
-  }
-}
-
-export interface R3BaseRefDecoratorDetection {
-  inputs?: {property: ClassMember, decorator: Decorator}[];
-  outputs?: {property: ClassMember, decorator: Decorator}[];
-  viewQueries?: {member: ClassMember, decorators: Decorator[]}[];
-  queries?: {member: ClassMember, decorators: Decorator[]}[];
-  host?: ClassMember[];
-}

packages/compiler-cli/src/ngtsc/annotations/src/directive.ts

@@ -19,16 +19,24 @@ import {AnalysisOutput, CompileResult, DecoratorHandler, DetectResult, HandlerFl
 
 import {compileNgFactoryDefField} from './factory';
 import {generateSetClassMetadataCall} from './metadata';
-import {findAngularDecorator, getConstructorDependencies, readBaseClass, unwrapConstructorDependencies, unwrapExpression, unwrapForwardRef, validateConstructorDependencies} from './util';
+import {findAngularDecorator, getConstructorDependencies, isAngularDecorator, readBaseClass, unwrapConstructorDependencies, unwrapExpression, unwrapForwardRef, validateConstructorDependencies} from './util';
 
 const EMPTY_OBJECT: {[key: string]: string} = {};
+const FIELD_DECORATORS = [
+  'Input', 'Output', 'ViewChild', 'ViewChildren', 'ContentChild', 'ContentChildren', 'HostBinding',
+  'HostListener'
+];
+const LIFECYCLE_HOOKS = new Set([
+  'ngOnChanges', 'ngOnInit', 'ngOnDestroy', 'ngDoCheck', 'ngAfterViewInit', 'ngAfterViewChecked',
+  'ngAfterContentInit', 'ngAfterContentChecked'
+]);
 
 export interface DirectiveHandlerData {
   meta: R3DirectiveMetadata;
   metadataStmt: Statement|null;
 }
 export class DirectiveDecoratorHandler implements
-    DecoratorHandler<DirectiveHandlerData, Decorator> {
+    DecoratorHandler<DirectiveHandlerData, Decorator|null> {
   constructor(
       private reflector: ReflectionHost, private evaluator: PartialEvaluator,
       private metaRegistry: MetadataRegistry, private defaultImportRecorder: DefaultImportRecorder,
@@ -36,27 +44,41 @@ export class DirectiveDecoratorHandler implements
 
   readonly precedence = HandlerPrecedence.PRIMARY;
 
-  detect(node: ClassDeclaration, decorators: Decorator[]|null): DetectResult<Decorator>|undefined {
+  detect(node: ClassDeclaration, decorators: Decorator[]|null):
-    if (!decorators) {
+      DetectResult<Decorator|null>|undefined {
+    // Compiling declaration files is invalid.
+    if (node.getSourceFile().isDeclarationFile) {
       return undefined;
     }
-    const decorator = findAngularDecorator(decorators, 'Directive', this.isCore);
+    // If the class is undecorated, check if any of the fields have Angular decorators or lifecycle
-    if (decorator !== undefined) {
+    // hooks, and if they do, label the class as an abstract directive.
-      return {
+    if (!decorators) {
-        trigger: decorator.node,
+      const angularField = this.reflector.getMembersOfClass(node).find(member => {
-        metadata: decorator,
+        if (!member.isStatic && member.kind === ClassMemberKind.Method &&
-      };
+            LIFECYCLE_HOOKS.has(member.name)) {
+          return true;
+        }
+        if (member.decorators) {
+          return member.decorators.some(
+              decorator => FIELD_DECORATORS.some(
+                  decoratorName => isAngularDecorator(decorator, decoratorName, this.isCore)));
+        }
+        return false;
+      });
+      return angularField ? {trigger: angularField.node, metadata: null} : undefined;
     } else {
-      return undefined;
+      const decorator = findAngularDecorator(decorators, 'Directive', this.isCore);
+      return decorator ? {trigger: decorator.node, metadata: decorator} : undefined;
     }
   }
 
-  analyze(node: ClassDeclaration, decorator: Decorator, flags = HandlerFlags.NONE):
+  analyze(node: ClassDeclaration, decorator: Decorator|null, flags = HandlerFlags.NONE):
       AnalysisOutput<DirectiveHandlerData> {
     const directiveResult = extractDirectiveMetadata(
         node, decorator, this.reflector, this.evaluator, this.defaultImportRecorder, this.isCore,
         flags);
     const analysis = directiveResult && directiveResult.metadata;
+
     if (analysis === undefined) {
       return {};
     }
@@ -112,15 +134,14 @@ export class DirectiveDecoratorHandler implements
  * the module.
  */
 export function extractDirectiveMetadata(
-    clazz: ClassDeclaration, decorator: Decorator, reflector: ReflectionHost,
+    clazz: ClassDeclaration, decorator: Decorator | null, reflector: ReflectionHost,
     evaluator: PartialEvaluator, defaultImportRecorder: DefaultImportRecorder, isCore: boolean,
     flags: HandlerFlags, defaultSelector: string | null = null): {
   decorator: Map<string, ts.Expression>,
   metadata: R3DirectiveMetadata,
-  decoratedElements: ClassMember[],
 }|undefined {
   let directive: Map<string, ts.Expression>;
-  if (decorator.args === null || decorator.args.length === 0) {
+  if (decorator === null || decorator.args === null || decorator.args.length === 0) {
     directive = new Map<string, ts.Expression>();
   } else if (decorator.args.length !== 1) {
     throw new FatalDiagnosticError(
@@ -256,7 +277,7 @@ export function extractDirectiveMetadata(
     typeArgumentCount: reflector.getGenericArityOfClass(clazz) || 0,
     typeSourceSpan: EMPTY_SOURCE_SPAN, usesInheritance, exportAs, providers
   };
-  return {decoratedElements, decorator: directive, metadata};
+  return {decorator: directive, metadata};
 }
 
 export function extractQueryMetadata(

packages/compiler-cli/src/ngtsc/program.ts

@@ -14,7 +14,6 @@ import {nocollapseHack} from '../transformers/nocollapse_hack';
 import {verifySupportedTypeScriptVersion} from '../typescript_support';
 
 import {ComponentDecoratorHandler, DirectiveDecoratorHandler, InjectableDecoratorHandler, NgModuleDecoratorHandler, NoopReferencesRegistry, PipeDecoratorHandler, ReferencesRegistry} from './annotations';
-import {BaseDefDecoratorHandler} from './annotations/src/base_def';
 import {CycleAnalyzer, ImportGraph} from './cycles';
 import {ErrorCode, ngErrorCode} from './diagnostics';
 import {FlatIndexGenerator, ReferenceGraph, checkForPrivateExports, findFlatIndexEntryPoint} from './entry_point';
@@ -587,7 +586,6 @@ export class NgtscProgram implements api.Program {
 
     // Set up the IvyCompilation, which manages state for the Ivy transformer.
     const handlers = [
-      new BaseDefDecoratorHandler(this.reflector, evaluator, this.isCore),
       new ComponentDecoratorHandler(
           this.reflector, evaluator, metaRegistry, this.metaReader !, scopeReader, scopeRegistry,
           this.isCore, this.resourceManager, this.rootDirs,

packages/compiler-cli/src/transformers/nocollapse_hack.ts

@@ -19,7 +19,6 @@
 
 // Pattern matching all Render3 property names.
 const R3_DEF_NAME_PATTERN = [
-  'ngBaseDef',
   'ɵcmp',
   'ɵdir',
   'ɵprov',

packages/compiler-cli/test/compliance/r3_compiler_compliance_spec.ts

@@ -2973,7 +2973,7 @@ describe('compiler compliance', () => {
       `
     };
 
-    it('should add ngBaseDef if one or more @Input is present', () => {
+    it('should add an abstract directive if one or more @Input is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3002,7 +3002,9 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
+        type: BaseClass,
+        selectors: [],
         inputs: {
           input1: "input1",
           input2: ["alias2", "input2"]
@@ -3014,7 +3016,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if one or more @Output is present', () => {
+    it('should add an abstract directive if one or more @Output is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3048,7 +3050,9 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
+        type: BaseClass,
+        selectors: [],
         outputs: {
           output1: "output1",
           output2: "output2"
@@ -3060,10 +3064,11 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a mixture of @Input and @Output props are present', () => {
+    it('should add an abstract directive if a mixture of @Input and @Output props are present',
-      const files = {
+       () => {
-        app: {
+         const files = {
-          'spec.ts': `
+           app: {
+             'spec.ts': `
             import {Component, NgModule, Input, Output, EventEmitter} from '@angular/core';
             export class BaseClass {
               @Output()
@@ -3096,11 +3101,13 @@ describe('compiler compliance', () => {
             })
             export class MyModule {}
           `
-        }
+           }
-      };
+         };
-      const expectedOutput = `
+         const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
+        type: BaseClass,
+        selectors: [],
         inputs: {
           input1: "input1",
           input2: ["whatever", "input2"]
@@ -3112,11 +3119,11 @@ describe('compiler compliance', () => {
       });
       // ...
       `;
-      const result = compile(files, angularFiles);
+         const result = compile(files, angularFiles);
-      expectEmit(result.source, expectedOutput, 'Invalid base definition');
+         expectEmit(result.source, expectedOutput, 'Invalid base definition');
-    });
+       });
 
-    it('should add ngBaseDef if a ViewChild query is present', () => {
+    it('should add an abstract directive if a ViewChild query is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3142,8 +3149,10 @@ describe('compiler compliance', () => {
       const expectedOutput = `
       const $e0_attrs$ = ["something"];
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        viewQuery: function (rf, ctx) {
+        type: BaseClass,
+        selectors: [],
+        viewQuery: function BaseClass_Query(rf, ctx) {
           if (rf & 1) {
             $r3$.ɵɵviewQuery($e0_attrs$, true);
           }
@@ -3159,7 +3168,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a ViewChildren query is present', () => {
+    it('should add an abstract directive if a ViewChildren query is present', () => {
       const files = {
         app: {
           ...directive,
@@ -3187,8 +3196,10 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        viewQuery: function (rf, ctx) {
+        type: BaseClass,
+        selectors: [],
+        viewQuery: function BaseClass_Query(rf, ctx) {
           if (rf & 1) {
             $r3$.ɵɵviewQuery(SomeDirective, true);
           }
@@ -3204,7 +3215,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a ContentChild query is present', () => {
+    it('should add an abstract directive if a ContentChild query is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3230,8 +3241,10 @@ describe('compiler compliance', () => {
       const expectedOutput = `
       const $e0_attrs$ = ["something"];
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        contentQueries: function (rf, ctx, dirIndex) {
+        type: BaseClass,
+        selectors: [],
+        contentQueries: function BaseClass_ContentQueries(rf, ctx, dirIndex) {
           if (rf & 1) {
             $r3$.ɵɵcontentQuery(dirIndex, $e0_attrs$, true);
           }
@@ -3247,7 +3260,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a ContentChildren query is present', () => {
+    it('should add an abstract directive if a ContentChildren query is present', () => {
       const files = {
         app: {
           ...directive,
@@ -3275,8 +3288,10 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = i0.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        contentQueries: function (rf, ctx, dirIndex) {
+        type: BaseClass,
+        selectors: [],
+        contentQueries: function BaseClass_ContentQueries(rf, ctx, dirIndex) {
           if (rf & 1) {
             $r3$.ɵɵcontentQuery(dirIndex, SomeDirective, false);
           }
@@ -3292,7 +3307,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a host binding is present', () => {
+    it('should add an abstract directive if a host binding is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3318,8 +3333,10 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = $r3$.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        hostBindings: function (rf, ctx, elIndex) {
+        type: BaseClass,
+        selectors: [],
+        hostBindings: function BaseClass_HostBindings(rf, ctx, elIndex) {
           if (rf & 1) {
             $r3$.ɵɵallocHostVars(1);
           }
@@ -3334,7 +3351,7 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should add ngBaseDef if a host listener is present', () => {
+    it('should add an abstract directive if a host listener is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3360,10 +3377,12 @@ describe('compiler compliance', () => {
       };
       const expectedOutput = `
       // ...
-      BaseClass.ngBaseDef = $r3$.ɵɵdefineBase({
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
-        hostBindings: function (rf, ctx, elIndex) {
+        type: BaseClass,
+        selectors: [],
+        hostBindings: function BaseClass_HostBindings(rf, ctx, elIndex) {
           if (rf & 1) {
-            $r3$.ɵɵlistener("mousedown", function ($event) {
+            $r3$.ɵɵlistener("mousedown", function BaseClass_mousedown_HostBindingHandler($event) {
               return ctx.handleMousedown($event);
             });
           }
@@ -3375,7 +3394,79 @@ describe('compiler compliance', () => {
       expectEmit(result.source, expectedOutput, 'Invalid base definition');
     });
 
-    it('should NOT add ngBaseDef if @Component is present', () => {
+    it('should add an abstract directive when using any lifecycle hook', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+            import {Component, NgModule, Input} from '@angular/core';
+            export class BaseClass {
+              ngAfterContentChecked() {}
+            }
+
+            @Component({
+              selector: 'my-component',
+              template: \`<div>{{input1}} {{input2}}</div>\`
+            })
+            export class MyComponent extends BaseClass {
+            }
+
+            @NgModule({
+              declarations: [MyComponent]
+            })
+            export class MyModule {}
+          `
+        }
+      };
+      const expectedOutput = `
+      // ...
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
+        type: BaseClass,
+        selectors: []
+      });
+      // ...
+      `;
+      const result = compile(files, angularFiles);
+      expectEmit(result.source, expectedOutput, 'Invalid base definition');
+    });
+
+
+    it('should add an abstract directive when using ngOnChanges', () => {
+      const files = {
+        app: {
+          'spec.ts': `
+            import {Component, NgModule, Input} from '@angular/core';
+            export class BaseClass {
+              ngOnChanges() {}
+            }
+
+            @Component({
+              selector: 'my-component',
+              template: \`<div>{{input1}} {{input2}}</div>\`
+            })
+            export class MyComponent extends BaseClass {
+            }
+
+            @NgModule({
+              declarations: [MyComponent]
+            })
+            export class MyModule {}
+          `
+        }
+      };
+      const expectedOutput = `
+      // ...
+      BaseClass.ɵdir = $r3$.ɵɵdefineDirective({
+        type: BaseClass,
+        selectors: [],
+        features: [$r3$.ɵɵNgOnChangesFeature()]
+      });
+      // ...
+      `;
+      const result = compile(files, angularFiles);
+      expectEmit(result.source, expectedOutput, 'Invalid base definition');
+    });
+
+    it('should NOT add an abstract directive if @Component is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3411,10 +3502,10 @@ describe('compiler compliance', () => {
         }
       };
       const result = compile(files, angularFiles);
-      expect(result.source).not.toContain('ngBaseDef');
+      expect(result.source).not.toContain('ɵdir');
     });
 
-    it('should NOT add ngBaseDef if @Directive is present', () => {
+    it('should NOT add an abstract directive if @Directive is present', () => {
       const files = {
         app: {
           'spec.ts': `
@@ -3449,7 +3540,7 @@ describe('compiler compliance', () => {
         }
       };
       const result = compile(files, angularFiles);
-      expect(result.source).not.toContain('ngBaseDef');
+      expect(result.source.match(/ɵdir/g) !.length).toBe(1);
     });
   });
 });

packages/compiler-cli/test/compliance/r3_view_compiler_input_outputs_spec.ts

@@ -16,7 +16,7 @@ describe('compiler compliance: listen()', () => {
     compileAnimations: false,
   });
 
-  it('should create declare inputs/outputs', () => {
+  it('should declare inputs/outputs', () => {
     const files = {
       app: {
         'spec.ts': `

packages/compiler-cli/test/ngtsc/ngtsc_spec.ts

@@ -416,7 +416,7 @@ runInEachFileSystem(os => {
       env.driveMain();
 
       const jsContents = env.getContents('test.js');
-      expect(jsContents).toContain('TestBase.ngBaseDef = i0.ɵɵdefineBase');
+      expect(jsContents).toContain('TestBase.ɵdir = i0.ɵɵdefineDirective');
       expect(jsContents).toContain('TestComponent.ɵcmp = i0.ɵɵdefineComponent');
       expect(jsContents).toContain('TestDirective.ɵdir = i0.ɵɵdefineDirective');
       expect(jsContents).toContain('TestPipe.ɵpipe = i0.ɵɵdefinePipe');
@@ -503,7 +503,7 @@ runInEachFileSystem(os => {
       expect(jsContents).toContain('background-color: blue');
     });
 
-    it('should include generic type for ngBaseDef declarations', () => {
+    it('should include generic type for undecorated class declarations', () => {
       env.write('test.ts', `
         import {Component, Input, NgModule} from '@angular/core';
 
@@ -515,10 +515,14 @@ runInEachFileSystem(os => {
       env.driveMain();
 
       const jsContents = env.getContents('test.js');
-      expect(jsContents).toContain('i0.ɵɵdefineBase({ inputs: { input: "input" } });');
+      expect(jsContents)
+          .toContain(
+              'i0.ɵɵdefineDirective({ type: TestBase, selectors: [], inputs: { input: "input" } });');
 
       const dtsContents = env.getContents('test.d.ts');
-      expect(dtsContents).toContain('static ngBaseDef: i0.ɵɵBaseDef<TestBase>');
+      expect(dtsContents)
+          .toContain(
+              `static ɵdir: i0.ɵɵDirectiveDefWithMeta<TestBase, never, never, { 'input': "input" }, {}, never>;`);
     });
 
     it('should compile NgModules without errors', () => {
@@ -1104,7 +1108,7 @@ runInEachFileSystem(os => {
         }));
         env.write('index.ts', `
           import {Directive} from '@angular/core';
-          
+
           @Directive()
           export class BaseClass {}
         `);
@@ -1115,10 +1119,10 @@ runInEachFileSystem(os => {
         env.write('index.ts', `
           import {NgModule, Directive} from '@angular/core';
           import {BaseClass} from 'lib1_built';
-          
+
           @Directive({selector: 'my-dir'})
           export class MyDirective extends BaseClass {}
-          
+
           @NgModule({declarations: [MyDirective]})
           export class AppModule {}
         `);
@@ -2615,7 +2619,7 @@ runInEachFileSystem(os => {
 
         env.write('test.ts', `/** I am a top-level comment. */
           import {NgModule} from '@angular/core';
-  
+
           @NgModule({})
           export class TestModule {}
       `);
@@ -2634,7 +2638,7 @@ runInEachFileSystem(os => {
 
         env.write('my-module.ts', `
           import {NgModule} from '@angular/core';
-  
+
           @NgModule({})
           export class MyModule {}
       `);
@@ -2647,7 +2651,7 @@ runInEachFileSystem(os => {
 
         env.write('test.ts', `
           import {NgModule} from '@angular/core';
-  
+
           @NgModule({})
           export class TestModule {}
       `);
@@ -2673,9 +2677,9 @@ runInEachFileSystem(os => {
       it('should generate a summary stub for decorated classes in the input file only', () => {
         env.write('test.ts', `
           import {Injectable, NgModule} from '@angular/core';
-  
+
           export class NotAModule {}
-  
+
           @NgModule({})
           export class TestModule {}
       `);
@@ -2689,10 +2693,10 @@ runInEachFileSystem(os => {
       it('should generate a summary stub for classes exported via exports', () => {
         env.write('test.ts', `
           import {Injectable, NgModule} from '@angular/core';
-  
+
           @NgModule({})
           class NotDirectlyExported {}
-  
+
           export {NotDirectlyExported};
       `);
 
@@ -3597,7 +3601,7 @@ runInEachFileSystem(os => {
       it('should not re-export a directive that\'s not exported from the NgModule', () => {
         env.write('dir.ts', `
              import {Directive} from '@angular/core';
-   
+
              @Directive({
                selector: 'dir',
              })
@@ -3606,7 +3610,7 @@ runInEachFileSystem(os => {
         env.write('module.ts', `
              import {NgModule} from '@angular/core';
              import {Dir} from './dir';
-   
+
              @NgModule({
                declarations: [Dir],
                exports: [],
@@ -3655,11 +3659,11 @@ runInEachFileSystem(os => {
       it('should not re-export a directive from an exported, external NgModule', () => {
         env.write(`node_modules/external/index.d.ts`, `
           import {ɵɵDirectiveDefWithMeta, ɵɵNgModuleDefWithMeta} from '@angular/core';
-  
+
           export declare class ExternalDir {
             static ɵdir: ɵɵDirectiveDefWithMeta<ExternalDir, '[test]', never, never, never, never>;
           }
-  
+
           export declare class ExternalModule {
             static ɵmod: ɵɵNgModuleDefWithMeta<ExternalModule, [typeof ExternalDir], never, [typeof ExternalDir]>;
           }
@@ -3719,7 +3723,7 @@ runInEachFileSystem(os => {
          () => {
            env.write('dir.ts', `
              import {Directive} from '@angular/core';
-   
+
              @Directive({
                selector: 'dir',
              })
@@ -3727,7 +3731,7 @@ runInEachFileSystem(os => {
            `);
            env.write('dir2.ts', `
              import {Directive} from '@angular/core';
-   
+
              @Directive({
                selector: 'dir',
              })
@@ -3737,7 +3741,7 @@ runInEachFileSystem(os => {
              import {NgModule} from '@angular/core';
              import {Dir} from './dir';
              import {Dir as Dir2} from './dir2';
-   
+
              @NgModule({
                declarations: [Dir, Dir2],
                exports: [Dir, Dir2],
@@ -3755,7 +3759,7 @@ runInEachFileSystem(os => {
       it('should choose a re-exported symbol if one is present', () => {
         env.write(`node_modules/external/dir.d.ts`, `
           import {ɵɵDirectiveDefWithMeta} from '@angular/core';
-  
+
           export declare class ExternalDir {
             static ɵdir: ɵɵDirectiveDefWithMeta<ExternalDir, '[test]', never, never, never, never>;
           }
@@ -3763,23 +3767,23 @@ runInEachFileSystem(os => {
         env.write('node_modules/external/module.d.ts', `
           import {ɵɵNgModuleDefWithMeta} from '@angular/core';
           import {ExternalDir} from './dir';
-  
+
           export declare class ExternalModule {
             static ɵmod: ɵɵNgModuleDefWithMeta<ExternalModule, [typeof ExternalDir], never, [typeof ExternalDir]>;
           }
-  
+
           export {ExternalDir as ɵngExportɵExternalModuleɵExternalDir};
         `);
         env.write('test.ts', `
           import {Component, Directive, NgModule} from '@angular/core';
           import {ExternalModule} from 'external/module';
-  
+
           @Component({
             selector: 'test-cmp',
             template: '<div test></div>',
           })
           class Cmp {}
-  
+
           @NgModule({
             declarations: [Cmp],
             imports: [ExternalModule],

packages/compiler/src/compiler.ts

@@ -101,7 +101,7 @@ export {compileInjector, compileNgModule, R3InjectorMetadata, R3NgModuleMetadata
 export {compilePipeFromMetadata, R3PipeMetadata} from './render3/r3_pipe_compiler';
 export {makeBindingParser, parseTemplate, ParseTemplateOptions} from './render3/view/template';
 export {R3Reference} from './render3/util';
-export {compileBaseDefFromMetadata, R3BaseRefMetaData, compileComponentFromMetadata, compileDirectiveFromMetadata, parseHostBindings, ParsedHostBindings, verifyHostBindings} from './render3/view/compiler';
+export {compileComponentFromMetadata, compileDirectiveFromMetadata, parseHostBindings, ParsedHostBindings, verifyHostBindings} from './render3/view/compiler';
 export {publishFacade} from './jit_compiler_facade';
 // This file only reexports content of the `src` folder. Keep it that way.
 

packages/compiler/src/compiler_facade_interface.ts

@@ -37,8 +37,6 @@ export interface CompilerFacade {
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3DirectiveMetadataFacade): any;
   compileComponent(
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3ComponentMetadataFacade): any;
-  compileBase(angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3BaseMetadataFacade):
-      any;
   compileFactory(
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3FactoryDefMetadataFacade): any;
 
@@ -160,16 +158,6 @@ export interface R3ComponentMetadataFacade extends R3DirectiveMetadataFacade {
   changeDetection?: ChangeDetectionStrategy;
 }
 
-export interface R3BaseMetadataFacade {
-  name: string;
-  type: any;
-  propMetadata: {[key: string]: any[]};
-  inputs?: {[key: string]: string | [string, string]};
-  outputs?: {[key: string]: string};
-  queries?: R3QueryMetadataFacade[];
-  viewQueries?: R3QueryMetadataFacade[];
-}
-
 export interface R3FactoryDefMetadataFacade {
   name: string;
   type: any;

packages/compiler/src/jit_compiler_facade.ts

@@ -7,7 +7,7 @@
  */
 
 
-import {CompilerFacade, CoreEnvironment, ExportedCompilerFacade, R3BaseMetadataFacade, R3ComponentMetadataFacade, R3DependencyMetadataFacade, R3DirectiveMetadataFacade, R3FactoryDefMetadataFacade, R3InjectableMetadataFacade, R3InjectorMetadataFacade, R3NgModuleMetadataFacade, R3PipeMetadataFacade, R3QueryMetadataFacade, StringMap, StringMapWithRename} from './compiler_facade_interface';
+import {CompilerFacade, CoreEnvironment, ExportedCompilerFacade, R3ComponentMetadataFacade, R3DependencyMetadataFacade, R3DirectiveMetadataFacade, R3FactoryDefMetadataFacade, R3InjectableMetadataFacade, R3InjectorMetadataFacade, R3NgModuleMetadataFacade, R3PipeMetadataFacade, R3QueryMetadataFacade, StringMap, StringMapWithRename} from './compiler_facade_interface';
 import {ConstantPool} from './constant_pool';
 import {HostBinding, HostListener, Input, Output, Type} from './core';
 import {Identifiers} from './identifiers';
@@ -22,7 +22,7 @@ import {R3InjectorMetadata, R3NgModuleMetadata, compileInjector, compileNgModule
 import {compilePipeFromMetadata} from './render3/r3_pipe_compiler';
 import {R3Reference} from './render3/util';
 import {R3DirectiveMetadata, R3QueryMetadata} from './render3/view/api';
-import {ParsedHostBindings, compileBaseDefFromMetadata, compileComponentFromMetadata, compileDirectiveFromMetadata, parseHostBindings, verifyHostBindings} from './render3/view/compiler';
+import {ParsedHostBindings, compileComponentFromMetadata, compileDirectiveFromMetadata, parseHostBindings, verifyHostBindings} from './render3/view/compiler';
 import {makeBindingParser, parseTemplate} from './render3/view/template';
 import {ResourceLoader} from './resource_loader';
 import {DomElementSchemaRegistry} from './schema/dom_element_schema_registry';
@@ -169,24 +169,6 @@ export class CompilerFacadeImpl implements CompilerFacade {
         factoryRes.factory, angularCoreEnv, sourceMapUrl, factoryRes.statements);
   }
 
-  compileBase(angularCoreEnv: CoreEnvironment, sourceMapUrl: string, facade: R3BaseMetadataFacade):
-      any {
-    const constantPool = new ConstantPool();
-    const typeSourceSpan =
-        this.createParseSourceSpan('Base', facade.name, `ng:///${facade.name}.js`);
-    const meta = {
-      ...facade,
-      typeSourceSpan,
-      viewQueries: facade.viewQueries ? facade.viewQueries.map(convertToR3QueryMetadata) :
-                                        facade.viewQueries,
-      queries: facade.queries ? facade.queries.map(convertToR3QueryMetadata) : facade.queries,
-      host: extractHostBindings(facade.propMetadata, typeSourceSpan)
-    };
-    const res = compileBaseDefFromMetadata(meta, constantPool, makeBindingParser());
-    return this.jitExpression(
-        res.expression, angularCoreEnv, sourceMapUrl, constantPool.statements);
-  }
-
   createParseSourceSpan(kind: string, typeName: string, sourceUrl: string): ParseSourceSpan {
     return r3JitTypeSourceSpan(kind, typeName, sourceUrl);
   }

packages/compiler/src/render3/r3_identifiers.ts

@@ -220,13 +220,6 @@ export class Identifiers {
   static resolveDocument: o.ExternalReference = {name: 'ɵɵresolveDocument', moduleName: CORE};
   static resolveBody: o.ExternalReference = {name: 'ɵɵresolveBody', moduleName: CORE};
 
-  static defineBase: o.ExternalReference = {name: 'ɵɵdefineBase', moduleName: CORE};
-
-  static BaseDef: o.ExternalReference = {
-    name: 'ɵɵBaseDef',
-    moduleName: CORE,
-  };
-
   static defineComponent: o.ExternalReference = {name: 'ɵɵdefineComponent', moduleName: CORE};
 
   static setComponentScope: o.ExternalReference = {name: 'ɵɵsetComponentScope', moduleName: CORE};

packages/compiler/src/render3/view/compiler.ts

@@ -129,61 +129,6 @@ export function compileDirectiveFromMetadata(
   return {expression, type};
 }
 
-export interface R3BaseRefMetaData {
-  name: string;
-  type: o.Expression;
-  typeSourceSpan: ParseSourceSpan;
-  inputs?: {[key: string]: string | [string, string]};
-  outputs?: {[key: string]: string};
-  viewQueries?: R3QueryMetadata[];
-  queries?: R3QueryMetadata[];
-  host?: R3HostMetadata;
-}
-
-/**
- * Compile a base definition for the render3 runtime as defined by {@link R3BaseRefMetadata}
- * @param meta the metadata used for compilation.
- */
-export function compileBaseDefFromMetadata(
-    meta: R3BaseRefMetaData, constantPool: ConstantPool, bindingParser: BindingParser) {
-  const definitionMap = new DefinitionMap();
-  if (meta.inputs) {
-    const inputs = meta.inputs;
-    const inputsMap = Object.keys(inputs).map(key => {
-      const v = inputs[key];
-      const value = Array.isArray(v) ? o.literalArr(v.map(vx => o.literal(vx))) : o.literal(v);
-      return {key, value, quoted: false};
-    });
-    definitionMap.set('inputs', o.literalMap(inputsMap));
-  }
-  if (meta.outputs) {
-    const outputs = meta.outputs;
-    const outputsMap = Object.keys(outputs).map(key => {
-      const value = o.literal(outputs[key]);
-      return {key, value, quoted: false};
-    });
-    definitionMap.set('outputs', o.literalMap(outputsMap));
-  }
-  if (meta.viewQueries && meta.viewQueries.length > 0) {
-    definitionMap.set('viewQuery', createViewQueriesFunction(meta.viewQueries, constantPool));
-  }
-  if (meta.queries && meta.queries.length > 0) {
-    definitionMap.set('contentQueries', createContentQueriesFunction(meta.queries, constantPool));
-  }
-  if (meta.host) {
-    definitionMap.set(
-        'hostBindings',
-        createHostBindingsFunction(
-            meta.host, meta.typeSourceSpan, bindingParser, constantPool, meta.name));
-  }
-
-  const expression = o.importExpr(R3.defineBase).callFn([definitionMap.toLiteralMap()]);
-  const type = new o.ExpressionType(
-      o.importExpr(R3.BaseDef), /* modifiers */ null, [o.expressionType(meta.type)]);
-
-  return {expression, type};
-}
-
 /**
  * Compile a component for the render3 runtime as defined by the `R3ComponentMetadata`.
  */

packages/compiler/test/compiler_facade_interface_spec.ts

@@ -103,10 +103,6 @@ const coreR3ComponentMetadataFacade: core.R3ComponentMetadataFacade =
 const compilerR3ComponentMetadataFacade: compiler.R3ComponentMetadataFacade =
     null !as core.R3ComponentMetadataFacade;
 
-const coreR3BaseMetadataFacade: core.R3BaseMetadataFacade = null !as compiler.R3BaseMetadataFacade;
-const compilerR3BaseMetadataFacade: compiler.R3BaseMetadataFacade =
-    null !as core.R3BaseMetadataFacade;
-
 const coreViewEncapsulation: core.ViewEncapsulation = null !as compiler.ViewEncapsulation;
 const compilerViewEncapsulation: compiler.ViewEncapsulation = null !as core.ViewEncapsulation;
 

packages/core/src/compiler/compiler_facade_interface.ts

@@ -37,8 +37,6 @@ export interface CompilerFacade {
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3DirectiveMetadataFacade): any;
   compileComponent(
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3ComponentMetadataFacade): any;
-  compileBase(angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3BaseMetadataFacade):
-      any;
   compileFactory(
       angularCoreEnv: CoreEnvironment, sourceMapUrl: string, meta: R3FactoryDefMetadataFacade): any;
 
@@ -160,16 +158,6 @@ export interface R3ComponentMetadataFacade extends R3DirectiveMetadataFacade {
   changeDetection?: ChangeDetectionStrategy;
 }
 
-export interface R3BaseMetadataFacade {
-  name: string;
-  type: any;
-  propMetadata: {[key: string]: any[]};
-  inputs?: {[key: string]: string | [string, string]};
-  outputs?: {[key: string]: string};
-  queries?: R3QueryMetadataFacade[];
-  viewQueries?: R3QueryMetadataFacade[];
-}
-
 export interface R3FactoryDefMetadataFacade {
   name: string;
   type: any;

packages/core/src/core_render3_private_export.ts

@@ -18,7 +18,6 @@ export {
   ɵɵattributeInterpolate7,
   ɵɵattributeInterpolate8,
   ɵɵattributeInterpolateV,
-  ɵɵdefineBase,
   ɵɵdefineComponent,
   ɵɵdefineDirective,
   ɵɵdefinePipe,
@@ -153,7 +152,6 @@ export {
   ɵɵembeddedViewEnd,
   store as ɵstore,
   ɵɵpipe,
-  ɵɵBaseDef,
   ComponentDef as ɵComponentDef,
   ɵɵComponentDefWithMeta,
   ɵɵFactoryDef,
@@ -227,7 +225,6 @@ export {
   NG_DIR_DEF as ɵNG_DIR_DEF,
   NG_PIPE_DEF as ɵNG_PIPE_DEF,
   NG_MOD_DEF as ɵNG_MOD_DEF,
-  NG_BASE_DEF as ɵNG_BASE_DEF
 } from './render3/fields';
 
 export {

packages/core/src/render3/definition.ts

@@ -16,8 +16,8 @@ import {initNgDevMode} from '../util/ng_dev_mode';
 import {stringify} from '../util/stringify';
 
 import {EMPTY_ARRAY, EMPTY_OBJ} from './empty';
-import {NG_BASE_DEF, NG_COMP_DEF, NG_DIR_DEF, NG_FACTORY_DEF, NG_LOC_ID_DEF, NG_MOD_DEF, NG_PIPE_DEF} from './fields';
+import {NG_COMP_DEF, NG_DIR_DEF, NG_FACTORY_DEF, NG_LOC_ID_DEF, NG_MOD_DEF, NG_PIPE_DEF} from './fields';
-import {ComponentDef, ComponentDefFeature, ComponentTemplate, ComponentType, ContentQueriesFunction, DirectiveDef, DirectiveDefFeature, DirectiveType, DirectiveTypesOrFactory, FactoryFn, HostBindingsFunction, PipeDef, PipeType, PipeTypesOrFactory, ViewQueriesFunction, ɵɵBaseDef} from './interfaces/definition';
+import {ComponentDef, ComponentDefFeature, ComponentTemplate, ComponentType, ContentQueriesFunction, DirectiveDef, DirectiveDefFeature, DirectiveTypesOrFactory, FactoryFn, HostBindingsFunction, PipeDef, PipeType, PipeTypesOrFactory, ViewQueriesFunction} from './interfaces/definition';
 import {TAttributes} from './interfaces/node';
 // while SelectorFlags is unused here, it's required so that types don't get resolved lazily
 // see: https://github.com/Microsoft/web-build-tools/issues/1050
@@ -484,107 +484,6 @@ function invertObject<T>(
   return newLookup;
 }
 
-/**
- * Create a base definition
- *
- * # Example
- * ```ts
- * class ShouldBeInherited {
- *   static ngBaseDef = ɵɵdefineBase({
- *      ...
- *   })
- * }
- * ```
- *
- * @param baseDefinition The base definition parameters
- *
- * @codeGenApi
- */
-export function ɵɵdefineBase<T>(baseDefinition: {
-  /**
-   * A map of input names.
-   *
-   * The format is in: `{[actualPropertyName: string]:(string|[string, string])}`.
-   *
-   * Given:
-   * ```
-   * class MyComponent {
-   *   @Input()
-   *   publicInput1: string;
-   *
-   *   @Input('publicInput2')
-   *   declaredInput2: string;
-   * }
-   * ```
-   *
-   * is described as:
-   * ```
-   * {
-   *   publicInput1: 'publicInput1',
-   *   declaredInput2: ['declaredInput2', 'publicInput2'],
-   * }
-   * ```
-   *
-   * Which the minifier may translate to:
-   * ```
-   * {
-   *   minifiedPublicInput1: 'publicInput1',
-   *   minifiedDeclaredInput2: [ 'declaredInput2', 'publicInput2'],
-   * }
-   * ```
-   *
-   * This allows the render to re-construct the minified, public, and declared names
-   * of properties.
-   *
-   * NOTE:
-   *  - Because declared and public name are usually same we only generate the array
-   *    `['declared', 'public']` format when they differ.
-   *  - The reason why this API and `outputs` API is not the same is that `NgOnChanges` has
-   *    inconsistent behavior in that it uses declared names rather than minified or public. For
-   *    this reason `NgOnChanges` will be deprecated and removed in future version and this
-   *    API will be simplified to be consistent with `outputs`.
-   */
-  inputs?: {[P in keyof T]?: string | [string, string]};
-
-  /**
-   * A map of output names.
-   *
-   * The format is in: `{[actualPropertyName: string]:string}`.
-   *
-   * Which the minifier may translate to: `{[minifiedPropertyName: string]:string}`.
-   *
-   * This allows the render to re-construct the minified and non-minified names
-   * of properties.
-   */
-  outputs?: {[P in keyof T]?: string};
-
-  /**
-   * Function to create instances of content queries associated with a given directive.
-   */
-  contentQueries?: ContentQueriesFunction<T>| null;
-
-  /**
-   * Additional set of instructions specific to view query processing. This could be seen as a
-   * set of instructions to be inserted into the template function.
-   */
-  viewQuery?: ViewQueriesFunction<T>| null;
-
-  /**
-   * Function executed by the parent template to allow children to apply host bindings.
-   */
-  hostBindings?: HostBindingsFunction<T>;
-}): ɵɵBaseDef<T> {
-  const declaredInputs: {[P in keyof T]: string} = {} as any;
-  return {
-    inputs: invertObject<T>(baseDefinition.inputs as any, declaredInputs),
-    declaredInputs: declaredInputs,
-    outputs: invertObject<T>(baseDefinition.outputs as any),
-    viewQuery: baseDefinition.viewQuery || null,
-    contentQueries: baseDefinition.contentQueries || null,
-    hostBindings: baseDefinition.hostBindings || null
-  };
-}
-
 /**
  * Create a directive definition object.
  *
@@ -751,10 +650,6 @@ export function getPipeDef<T>(type: any): PipeDef<T>|null {
   return type[NG_PIPE_DEF] || null;
 }
 
-export function getBaseDef<T>(type: any): ɵɵBaseDef<T>|null {
-  return type[NG_BASE_DEF] || null;
-}
-
 export function getFactoryDef<T>(type: any, throwNotFound: true): FactoryFn<T>;
 export function getFactoryDef<T>(type: any): FactoryFn<T>|null;
 export function getFactoryDef<T>(type: any, throwNotFound?: boolean): FactoryFn<T>|null {

packages/core/src/render3/features/inherit_definition_feature.ts

@@ -12,8 +12,6 @@ import {EMPTY_ARRAY, EMPTY_OBJ} from '../empty';
 import {ComponentDef, ContentQueriesFunction, DirectiveDef, DirectiveDefFeature, HostBindingsFunction, RenderFlags, ViewQueriesFunction} from '../interfaces/definition';
 import {isComponentDef} from '../interfaces/type_checks';
 
-import {ɵɵNgOnChangesFeature} from './ng_onchanges_feature';
-
 export function getSuperType(type: Type<any>): Type<any>&
     {ɵcmp?: ComponentDef<any>, ɵdir?: DirectiveDef<any>} {
   return Object.getPrototypeOf(type.prototype).constructor;
@@ -41,30 +39,14 @@ export function ɵɵInheritDefinitionFeature(definition: DirectiveDef<any>| Comp
       superDef = superType.ɵdir;
     }
 
-    const baseDef = (superType as any).ngBaseDef;
+    if (superDef) {
-
+      // Some fields in the definition may be empty, if there were no values to put in them that
-    // Some fields in the definition may be empty, if there were no values to put in them that
+      // would've justified object creation. Unwrap them if necessary.
-    // would've justified object creation. Unwrap them if necessary.
-    if (baseDef || superDef) {
       const writeableDef = definition as any;
       writeableDef.inputs = maybeUnwrapEmpty(definition.inputs);
       writeableDef.declaredInputs = maybeUnwrapEmpty(definition.declaredInputs);
       writeableDef.outputs = maybeUnwrapEmpty(definition.outputs);
-    }
 
-    if (baseDef) {
-      const baseViewQuery = baseDef.viewQuery;
-      const baseContentQueries = baseDef.contentQueries;
-      const baseHostBindings = baseDef.hostBindings;
-      baseHostBindings && inheritHostBindings(definition, baseHostBindings);
-      baseViewQuery && inheritViewQuery(definition, baseViewQuery);
-      baseContentQueries && inheritContentQueries(definition, baseContentQueries);
-      fillProperties(definition.inputs, baseDef.inputs);
-      fillProperties(definition.declaredInputs, baseDef.declaredInputs);
-      fillProperties(definition.outputs, baseDef.outputs);
-    }
-
-    if (superDef) {
       // Merge hostBindings
       const superHostBindings = superDef.hostBindings;
       superHostBindings && inheritHostBindings(definition, superHostBindings);
@@ -101,25 +83,6 @@ export function ɵɵInheritDefinitionFeature(definition: DirectiveDef<any>| Comp
           }
         }
       }
-    } else {
-      // Even if we don't have a definition, check the type for the hooks and use those if need be
-      const superPrototype = superType.prototype;
-      if (superPrototype) {
-        definition.afterContentChecked =
-            definition.afterContentChecked || superPrototype.ngAfterContentChecked;
-        definition.afterContentInit =
-            definition.afterContentInit || superPrototype.ngAfterContentInit;
-        definition.afterViewChecked =
-            definition.afterViewChecked || superPrototype.ngAfterViewChecked;
-        definition.afterViewInit = definition.afterViewInit || superPrototype.ngAfterViewInit;
-        definition.doCheck = definition.doCheck || superPrototype.ngDoCheck;
-        definition.onDestroy = definition.onDestroy || superPrototype.ngOnDestroy;
-        definition.onInit = definition.onInit || superPrototype.ngOnInit;
-
-        if (superPrototype.ngOnChanges) {
-          ɵɵNgOnChangesFeature()(definition);
-        }
-      }
     }
 
     superType = Object.getPrototypeOf(superType);

packages/core/src/render3/fields.ts

@@ -13,7 +13,6 @@ export const NG_DIR_DEF = getClosureSafeProperty({ɵdir: getClosureSafeProperty}
 export const NG_PIPE_DEF = getClosureSafeProperty({ɵpipe: getClosureSafeProperty});
 export const NG_MOD_DEF = getClosureSafeProperty({ɵmod: getClosureSafeProperty});
 export const NG_LOC_ID_DEF = getClosureSafeProperty({ɵloc: getClosureSafeProperty});
-export const NG_BASE_DEF = getClosureSafeProperty({ngBaseDef: getClosureSafeProperty});
 export const NG_FACTORY_DEF = getClosureSafeProperty({ɵfac: getClosureSafeProperty});
 
 /**

packages/core/src/render3/index.ts

@@ -6,12 +6,12 @@
  * found in the LICENSE file at https://angular.io/license
  */
 import {LifecycleHooksFeature, renderComponent, whenRendered} from './component';
-import {ɵɵdefineBase, ɵɵdefineComponent, ɵɵdefineDirective, ɵɵdefineNgModule, ɵɵdefinePipe, ɵɵsetComponentScope, ɵɵsetNgModuleScope} from './definition';
+import {ɵɵdefineComponent, ɵɵdefineDirective, ɵɵdefineNgModule, ɵɵdefinePipe, ɵɵsetComponentScope, ɵɵsetNgModuleScope} from './definition';
 import {ɵɵCopyDefinitionFeature} from './features/copy_definition_feature';
 import {ɵɵInheritDefinitionFeature} from './features/inherit_definition_feature';
 import {ɵɵNgOnChangesFeature} from './features/ng_onchanges_feature';
 import {ɵɵProvidersFeature} from './features/providers_feature';
-import {ComponentDef, ComponentTemplate, ComponentType, DirectiveDef, DirectiveType, PipeDef, ɵɵBaseDef, ɵɵComponentDefWithMeta, ɵɵDirectiveDefWithMeta, ɵɵFactoryDef, ɵɵPipeDefWithMeta} from './interfaces/definition';
+import {ComponentDef, ComponentTemplate, ComponentType, DirectiveDef, DirectiveType, PipeDef, ɵɵComponentDefWithMeta, ɵɵDirectiveDefWithMeta, ɵɵFactoryDef, ɵɵPipeDefWithMeta} from './interfaces/definition';
 import {getComponent, getDirectives, getHostElement, getRenderedText} from './util/discovery_utils';
 
 export {ComponentFactory, ComponentFactoryResolver, ComponentRef, injectComponentFactoryResolver} from './component_ref';
@@ -99,7 +99,7 @@ export {
 
   ɵɵreference,
 
-  // TODO: remove `select` once we're refactored all of the tests not to use it.
+  // TODO: remove `select` once we've refactored all of the tests not to use it.
   ɵɵselect,
   ɵɵadvance,
   ɵɵstyleMap,
@@ -202,7 +202,6 @@ export {ɵɵresolveWindow, ɵɵresolveDocument, ɵɵresolveBody} from './util/mi
 // clang-format on
 
 export {
-  ɵɵBaseDef,
   ComponentDef,
   ɵɵComponentDefWithMeta,
   ɵɵFactoryDef,
@@ -221,7 +220,6 @@ export {
   ɵɵdefineComponent,
   ɵɵdefineDirective,
   ɵɵdefineNgModule,
-  ɵɵdefineBase,
   ɵɵdefinePipe,
   getHostElement,
   getComponent,

packages/core/src/render3/interfaces/definition.ts

@@ -97,17 +97,20 @@ export type ɵɵDirectiveDefWithMeta<
     OutputMap extends{[key: string]: string}, QueryFields extends string[]> = DirectiveDef<T>;
 
 /**
- * Runtime information for classes that are inherited by components or directives
+ * Runtime link information for Directives.
- * that aren't defined as components or directives.
  *
- * This is an internal data structure used by the renderer to determine what inputs
+ * This is an internal data structure used by the render to link
- * and outputs should be inherited.
+ * directives into templates.
  *
- * See: {@link defineBase}
+ * NOTE: Always use `defineDirective` function to create this object,
+ * never create the object directly since the shape of this object
+ * can change between versions.
  *
- * @codeGenApi
+ * @param Selector type metadata specifying the selector of the directive or component
+ *
+ * See: {@link defineDirective}
  */
-export interface ɵɵBaseDef<T> {
+export interface DirectiveDef<T> {
   /**
    * A dictionary mapping the inputs' minified property names to their public API names, which
    * are their aliases if any, or their original unminified property names
@@ -144,23 +147,7 @@ export interface ɵɵBaseDef<T> {
    * Refreshes host bindings on the associated directive.
    */
   hostBindings: HostBindingsFunction<T>|null;
-}
 
-/**
- * Runtime link information for Directives.
- *
- * This is internal data structure used by the render to link
- * directives into templates.
- *
- * NOTE: Always use `defineDirective` function to create this object,
- * never create the object directly since the shape of this object
- * can change between versions.
- *
- * @param Selector type metadata specifying the selector of the directive or component
- *
- * See: {@link defineDirective}
- */
-export interface DirectiveDef<T> extends ɵɵBaseDef<T> {
   /** Token representing the directive. Used by DI. */
   type: Type<T>;
 
@@ -219,7 +206,7 @@ export type ɵɵFactoryDef<T> = () => T;
 /**
  * Runtime link information for Components.
  *
- * This is internal data structure used by the render to link
+ * This is an internal data structure used by the render to link
  * components into templates.
  *
  * NOTE: Always use `defineComponent` function to create this object,
@@ -331,7 +318,7 @@ export interface ComponentDef<T> extends DirectiveDef<T> {
 /**
  * Runtime link information for Pipes.
  *
- * This is internal data structure used by the renderer to link
+ * This is an internal data structure used by the renderer to link
  * pipes into templates.
  *
  * NOTE: Always use `definePipe` function to create this object,

packages/core/src/render3/jit/directive.ts

@@ -7,7 +7,7 @@
  */
 
 import {R3DirectiveMetadataFacade, getCompilerFacade} from '../../compiler/compiler_facade';
-import {R3BaseMetadataFacade, R3ComponentMetadataFacade, R3QueryMetadataFacade} from '../../compiler/compiler_facade_interface';
+import {R3ComponentMetadataFacade, R3QueryMetadataFacade} from '../../compiler/compiler_facade_interface';
 import {resolveForwardRef} from '../../di/forward_ref';
 import {getReflect, reflectDependencies} from '../../di/jit/util';
 import {Type} from '../../interface/type';
@@ -16,9 +16,9 @@ import {Component, Directive, Input} from '../../metadata/directives';
 import {componentNeedsResolution, maybeQueueResolutionOfComponentResources} from '../../metadata/resource_loading';
 import {ViewEncapsulation} from '../../metadata/view';
 import {initNgDevMode} from '../../util/ng_dev_mode';
-import {getBaseDef, getComponentDef, getDirectiveDef} from '../definition';
+import {getComponentDef, getDirectiveDef} from '../definition';
 import {EMPTY_ARRAY, EMPTY_OBJ} from '../empty';
-import {NG_BASE_DEF, NG_COMP_DEF, NG_DIR_DEF, NG_FACTORY_DEF} from '../fields';
+import {NG_COMP_DEF, NG_DIR_DEF, NG_FACTORY_DEF} from '../fields';
 import {ComponentType} from '../interfaces/definition';
 import {stringifyForError} from '../util/misc_utils';
 
@@ -84,7 +84,7 @@ export function compileComponent(type: Type<any>, metadata: Component): void {
           viewProviders: metadata.viewProviders || null,
         };
         if (meta.usesInheritance) {
-          addBaseDefToUndecoratedParents(type);
+          addDirectiveDefToUndecoratedParents(type);
         }
 
         ngComponentDef = compiler.compileComponent(angularCoreEnv, templateUrl, meta);
@@ -153,7 +153,7 @@ function getDirectiveMetadata(type: Type<any>, metadata: Directive) {
   const facade = directiveMetadata(type as ComponentType<any>, metadata);
   facade.typeSourceSpan = compiler.createParseSourceSpan('Directive', name, sourceMapUrl);
   if (facade.usesInheritance) {
-    addBaseDefToUndecoratedParents(type);
+    addDirectiveDefToUndecoratedParents(type);
   }
   return {metadata: facade, sourceMapUrl};
 }
@@ -202,7 +202,7 @@ export function directiveMetadata(type: Type<any>, metadata: Directive): R3Direc
     inputs: metadata.inputs || EMPTY_ARRAY,
     outputs: metadata.outputs || EMPTY_ARRAY,
     queries: extractQueriesMetadata(type, propMetadata, isContentQuery),
-    lifecycle: {usesOnChanges: type.prototype.hasOwnProperty('ngOnChanges')},
+    lifecycle: {usesOnChanges: usesLifecycleHook(type, 'ngOnChanges')},
     typeSourceSpan: null !,
     usesInheritance: !extendsDirectlyFromObject(type),
     exportAs: extractExportAs(metadata.exportAs),
@@ -212,76 +212,24 @@ export function directiveMetadata(type: Type<any>, metadata: Directive): R3Direc
 }
 
 /**
- * Adds an `ngBaseDef` to all parent classes of a type that don't have an Angular decorator.
+ * Adds a directive definition to all parent classes of a type that don't have an Angular decorator.
  */
-function addBaseDefToUndecoratedParents(type: Type<any>) {
+function addDirectiveDefToUndecoratedParents(type: Type<any>) {
   const objPrototype = Object.prototype;
   let parent = Object.getPrototypeOf(type);
 
   // Go up the prototype until we hit `Object`.
   while (parent && parent !== objPrototype) {
     // Since inheritance works if the class was annotated already, we only need to add
-    // the base def if there are no annotations and the base def hasn't been created already.
+    // the def if there are no annotations and the def hasn't been created already.
-    if (!getDirectiveDef(parent) && !getComponentDef(parent) && !getBaseDef(parent)) {
+    if (!getDirectiveDef(parent) && !getComponentDef(parent) &&
-      const facade = extractBaseDefMetadata(parent);
+        shouldAddAbstractDirective(parent)) {
-      facade && compileBase(parent, facade);
+      compileDirective(parent, null);
     }
     parent = Object.getPrototypeOf(parent);
   }
 }
 
-/** Compiles the base metadata into a base definition. */
-function compileBase(type: Type<any>, facade: R3BaseMetadataFacade): void {
-  let ngBaseDef: any = null;
-  Object.defineProperty(type, NG_BASE_DEF, {
-    get: () => {
-      if (ngBaseDef === null) {
-        const name = type && type.name;
-        const sourceMapUrl = `ng://${name}/ngBaseDef.js`;
-        const compiler = getCompilerFacade();
-        ngBaseDef = compiler.compileBase(angularCoreEnv, sourceMapUrl, facade);
-      }
-      return ngBaseDef;
-    },
-    // Make the property configurable in dev mode to allow overriding in tests
-    configurable: !!ngDevMode,
-  });
-}
-
-/** Extracts the metadata necessary to construct an `ngBaseDef` from a class. */
-function extractBaseDefMetadata(type: Type<any>): R3BaseMetadataFacade|null {
-  const propMetadata = getReflect().ownPropMetadata(type);
-  const viewQueries = extractQueriesMetadata(type, propMetadata, isViewQuery);
-  const queries = extractQueriesMetadata(type, propMetadata, isContentQuery);
-  let inputs: {[key: string]: string | [string, string]}|undefined;
-  let outputs: {[key: string]: string}|undefined;
-  // We only need to know whether there are any HostListener or HostBinding
-  // decorators present, the parsing logic is in the compiler already.
-  let hasHostDecorators = false;
-
-  for (const field in propMetadata) {
-    propMetadata[field].forEach(ann => {
-      const metadataName = ann.ngMetadataName;
-      if (metadataName === 'Input') {
-        inputs = inputs || {};
-        inputs[field] = ann.bindingPropertyName ? [ann.bindingPropertyName, field] : field;
-      } else if (metadataName === 'Output') {
-        outputs = outputs || {};
-        outputs[field] = ann.bindingPropertyName || field;
-      } else if (metadataName === 'HostBinding' || metadataName === 'HostListener') {
-        hasHostDecorators = true;
-      }
-    });
-  }
-
-  // Only generate the base def if there's any info inside it.
-  if (inputs || outputs || viewQueries.length || queries.length || hasHostDecorators) {
-    return {name: type.name, type, inputs, outputs, viewQueries, queries, propMetadata};
-  }
-
-  return null;
-}
-
 function convertToR3QueryPredicate(selector: any): any|string[] {
   return typeof selector === 'string' ? splitByComma(selector) : resolveForwardRef(selector);
 }
@@ -310,7 +258,7 @@ function extractQueriesMetadata(
                 `Can't construct a query for the property "${field}" of ` +
                 `"${stringifyForError(type)}" since the query selector wasn't defined.`);
           }
-          if (annotations.some(isInputAnn)) {
+          if (annotations.some(isInputAnnotation)) {
             throw new Error(`Cannot combine @Input decorators with query decorators`);
           }
           queriesMeta.push(convertToR3QueryMetadata(field, ann));
@@ -322,11 +270,7 @@ function extractQueriesMetadata(
 }
 
 function extractExportAs(exportAs: string | undefined): string[]|null {
-  if (exportAs === undefined) {
+  return exportAs === undefined ? null : splitByComma(exportAs);
-    return null;
-  }
-
-  return exportAs.split(',').map(part => part.trim());
 }
 
 function isContentQuery(value: any): value is Query {
@@ -339,10 +283,45 @@ function isViewQuery(value: any): value is Query {
   return name === 'ViewChild' || name === 'ViewChildren';
 }
 
-function isInputAnn(value: any): value is Input {
+function isInputAnnotation(value: any): value is Input {
   return value.ngMetadataName === 'Input';
 }
 
 function splitByComma(value: string): string[] {
   return value.split(',').map(piece => piece.trim());
 }
+
+function usesLifecycleHook(type: Type<any>, name: string): boolean {
+  const prototype = type.prototype;
+  return prototype && prototype.hasOwnProperty(name);
+}
+
+const LIFECYCLE_HOOKS = [
+  'ngOnChanges', 'ngOnInit', 'ngOnDestroy', 'ngDoCheck', 'ngAfterViewInit', 'ngAfterViewChecked',
+  'ngAfterContentInit', 'ngAfterContentChecked'
+];
+
+function shouldAddAbstractDirective(type: Type<any>): boolean {
+  if (LIFECYCLE_HOOKS.some(hookName => usesLifecycleHook(type, hookName))) {
+    return true;
+  }
+
+  const propMetadata = getReflect().ownPropMetadata(type);
+
+  for (const field in propMetadata) {
+    const annotations = propMetadata[field];
+
+    for (let i = 0; i < annotations.length; i++) {
+      const current = annotations[i];
+      const metadataName = current.ngMetadataName;
+
+      if (isInputAnnotation(current) || isContentQuery(current) || isViewQuery(current) ||
+          metadataName === 'Output' || metadataName === 'HostBinding' ||
+          metadataName === 'HostListener') {
+        return true;
+      }
+    }
+  }
+
+  return false;
+}

packages/core/src/render3/jit/environment.ts

@@ -30,7 +30,6 @@ export const angularCoreEnv: {[name: string]: Function} =
        'ɵɵattributeInterpolate7': r3.ɵɵattributeInterpolate7,
        'ɵɵattributeInterpolate8': r3.ɵɵattributeInterpolate8,
        'ɵɵattributeInterpolateV': r3.ɵɵattributeInterpolateV,
-       'ɵɵdefineBase': r3.ɵɵdefineBase,
        'ɵɵdefineComponent': r3.ɵɵdefineComponent,
        'ɵɵdefineDirective': r3.ɵɵdefineDirective,
        'ɵɵdefineInjectable': ɵɵdefineInjectable,

packages/core/test/acceptance/inherit_definition_feature_spec.ts

@@ -214,6 +214,37 @@ describe('inheritance', () => {
 
       expect(log).toEqual(['on changes!']);
     });
+
+    it('should be inherited from undecorated super class which inherits from decorated one', () => {
+      let changes = 0;
+
+      abstract class Base {
+        // Add an Input so that we have at least one Angular decorator on a class field.
+        @Input() inputBase: any;
+        abstract input: any;
+      }
+
+      abstract class UndecoratedBase extends Base {
+        abstract input: any;
+        ngOnChanges() { changes++; }
+      }
+
+      @Component({selector: 'my-comp', template: ''})
+      class MyComp extends UndecoratedBase {
+        @Input() input: any;
+      }
+
+      @Component({template: '<my-comp [input]="value"></my-comp>'})
+      class App {
+        value = 'hello';
+      }
+
+      TestBed.configureTestingModule({declarations: [MyComp, App]});
+      const fixture = TestBed.createComponent(App);
+      fixture.detectChanges();
+
+      expect(changes).toBe(1);
+    });
   });
 
   describe('of bare super class by a directive', () => {

packages/core/test/render3/jit_environment_spec.ts

@@ -12,7 +12,6 @@ import {Identifiers} from '@angular/compiler/src/render3/r3_identifiers';
 import {angularCoreEnv} from '../../src/render3/jit/environment';
 
 const INTERFACE_EXCEPTIONS = new Set<string>([
-  'ɵɵBaseDef',
   'ɵɵComponentDefWithMeta',
   'ɵɵDirectiveDefWithMeta',
   'ɵɵInjectorDef',

tools/public_api_guard/core/core.d.ts

@@ -701,21 +701,6 @@ export declare function ɵɵattributeInterpolate8(attrName: string, prefix: stri
 
 export declare function ɵɵattributeInterpolateV(attrName: string, values: any[], sanitizer?: SanitizerFn, namespace?: string): TsickleIssue1009;
 
-export interface ɵɵBaseDef<T> {
-    contentQueries: ContentQueriesFunction<T> | null;
-    /** @deprecated */ readonly declaredInputs: {
-        [P in keyof T]: string;
-    };
-    hostBindings: HostBindingsFunction<T> | null;
-    readonly inputs: {
-        [P in keyof T]: string;
-    };
-    readonly outputs: {
-        [P in keyof T]: string;
-    };
-    viewQuery: ViewQueriesFunction<T> | null;
-}
-
 export declare function ɵɵclassMap(classes: {
     [className: string]: any;
 } | NO_CHANGE | string | null): void;
@@ -760,18 +745,6 @@ export declare function ɵɵCopyDefinitionFeature(definition: DirectiveDef<any>
 
 export declare const ɵɵdefaultStyleSanitizer: StyleSanitizeFn;
 
-export declare function ɵɵdefineBase<T>(baseDefinition: {
-    inputs?: {
-        [P in keyof T]?: string | [string, string];
-    };
-    outputs?: {
-        [P in keyof T]?: string;
-    };
-    contentQueries?: ContentQueriesFunction<T> | null;
-    viewQuery?: ViewQueriesFunction<T> | null;
-    hostBindings?: HostBindingsFunction<T>;
-}): ɵɵBaseDef<T>;
-
 export declare function ɵɵdefineComponent<T>(componentDefinition: {
     type: Type<T>;
     selectors: CssSelectorList;