Alex Rickabaugh
9c1735bdde
The `inject()` function was introduced with Ivy to support imperative injection in factory/constructor contexts, such as directive or service constructors as well as factory functions defined in `@Injectable` or `InjectionToken`. However, `inject()` in a component/directive constructor did not work due to a flaw in the logic for creating the internal factory for components/directives. The original intention of this logic was to keep `ɵɵdirectiveInject` tree- shakable for applications which don't use any component-level DI. However, this breaks the `inject()` functionality for component/directive constructors. This commit fixes that issue and adds tests for all the various cases in which `inject()` should function. As a result `ɵɵdirectiveInject` is no longer tree-shakable, but that's totally acceptable as any application that uses `*ngIf` or `*ngFor` already contains this function. It's possible to change how `inject()` works to restore this tree-shakability if needed. PR Close #45991
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