Function compilePipe

packages/core/src/render3/jit/pipe.ts:21–68

(type: Type<any>, meta: Pipe)

import {angularCoreEnv} from './environment';

export function compilePipe(type: Type<any>, meta: Pipe): void {
  let ngPipeDef: any = null;
  let ngFactoryDef: any = null;

  Object.defineProperty(type, NG_FACTORY_DEF, {
    get: () => {
      if (ngFactoryDef === null) {
        const metadata = getPipeMetadata(type, meta);
        const compiler = getCompilerFacade({
          usage: JitCompilerUsage.Decorator,
          kind: 'pipe',
          type: metadata.type,
        });
        ngFactoryDef = compiler.compileFactory(angularCoreEnv, `ng:///${metadata.name}/ɵfac.js`, {
          name: metadata.name,
          type: metadata.type,
          typeArgumentCount: 0,
          deps: reflectDependencies(type),
          target: compiler.FactoryTarget.Pipe,
        });
      }
      return ngFactoryDef;
    },
    // Make the property configurable in dev mode to allow overriding in tests
    configurable: !!ngDevMode,
  });

  Object.defineProperty(type, NG_PIPE_DEF, {
    get: () => {
      if (ngPipeDef === null) {
        const metadata = getPipeMetadata(type, meta);
        const compiler = getCompilerFacade({
          usage: JitCompilerUsage.Decorator,
          kind: 'pipe',
          type: metadata.type,
        });
        ngPipeDef = compiler.compilePipe(
          angularCoreEnv,
          `ng:///${metadata.name}/ɵpipe.js`,
          metadata,
        );
      }
      return ngPipeDef;
    },
    // Make the property configurable in dev mode to allow overriding in tests
    configurable: !!ngDevMode,
  });
}

function getPipeMetadata(type: Type<any>, meta: Pipe): R3PipeMetadataFacade {
  return {