Method addProvider

packages/core/injector/module.ts:249–285

(provider: Provider, enhancerSubtype?: EnhancerSubtype)

    enhancerSubtype: EnhancerSubtype,
  ): InjectionToken;
  public addProvider(provider: Provider, enhancerSubtype?: EnhancerSubtype) {
    if (this.isCustomProvider(provider)) {
      if (this.isEntryProvider(provider.provide)) {
        this._entryProviderKeys.add(provider.provide);
      }
      return this.addCustomProvider(provider, this._providers, enhancerSubtype);
    }

    const isAlreadyDeclared = this._providers.has(provider);
    if (
      (this.isTransientProvider(provider) ||
        this.isRequestScopeProvider(provider)) &&
      isAlreadyDeclared
    ) {
      return provider;
    }

    this._providers.set(
      provider,
      new InstanceWrapper({
        token: provider,
        name: (provider as Type<Injectable>).name,
        metatype: provider as Type<Injectable>,
        instance: null,
        isResolved: false,
        scope: getClassScope(provider),
        durable: isDurable(provider),
        host: this,
      }),
    );

    if (this.isEntryProvider(provider)) {
      this._entryProviderKeys.add(provider);
    }

    return provider as Type<Injectable>;
  }

  public isCustomProvider(
    provider: Provider,