fix(core): add noSideEffects() to make*Decorator() functions (#35769)

This causes all the `make*Decorator()` functions to be considered pure and to be eligible for associated tree shaking by Closure.

PR Close #35769

packages/core/src/util/decorators.ts

@@ -8,6 +8,10 @@
 
 import {Type} from '../interface/type';
 
+import {noSideEffects} from './closure';
+
+
+
 /**
  * An interface implemented by all Angular type decorators, which allows them to be used as
  * decorators as well as Angular syntax.
@@ -44,6 +48,7 @@ export function makeDecorator<T>(
     additionalProcessing?: (type: Type<T>) => void,
     typeFn?: (type: Type<T>, ...args: any[]) => void):
     {new (...args: any[]): any; (...args: any[]): any; (...args: any[]): (cls: any) => any;} {
+  return noSideEffects(() => {
     const metaCtor = makeMetadataCtor(props);
 
     function DecoratorFactory(
@@ -77,6 +82,7 @@ export function makeDecorator<T>(
     DecoratorFactory.prototype.ngMetadataName = name;
     (DecoratorFactory as any).annotationCls = DecoratorFactory;
     return DecoratorFactory as any;
+  });
 }
 
 function makeMetadataCtor(props?: (...args: any[]) => any): any {
@@ -92,6 +98,7 @@ function makeMetadataCtor(props?: (...args: any[]) => any): any {
 
 export function makeParamDecorator(
     name: string, props?: (...args: any[]) => any, parentClass?: any): any {
+  return noSideEffects(() => {
     const metaCtor = makeMetadataCtor(props);
     function ParamDecoratorFactory(
         this: unknown | typeof ParamDecoratorFactory, ...args: any[]): any {
@@ -127,14 +134,17 @@ export function makeParamDecorator(
     ParamDecoratorFactory.prototype.ngMetadataName = name;
     (<any>ParamDecoratorFactory).annotationCls = ParamDecoratorFactory;
     return ParamDecoratorFactory;
+  });
 }
 
 export function makePropDecorator(
     name: string, props?: (...args: any[]) => any, parentClass?: any,
     additionalProcessing?: (target: any, name: string, ...args: any[]) => void): any {
+  return noSideEffects(() => {
     const metaCtor = makeMetadataCtor(props);
 
-  function PropDecoratorFactory(this: unknown | typeof PropDecoratorFactory, ...args: any[]): any {
+    function PropDecoratorFactory(
+        this: unknown | typeof PropDecoratorFactory, ...args: any[]): any {
       if (this instanceof PropDecoratorFactory) {
         metaCtor.apply(this, args);
         return this;
@@ -165,4 +175,5 @@ export function makePropDecorator(
     PropDecoratorFactory.prototype.ngMetadataName = name;
     (<any>PropDecoratorFactory).annotationCls = PropDecoratorFactory;
     return PropDecoratorFactory;
+  });
 }

packages/core/test/bundling/injection/bundle.golden_symbols.json

@@ -220,5 +220,8 @@
   },
   {
     "name": "ɵɵinject"
+  },
+  {
+    "name": "noSideEffects"
   }
 ]