d2742cf473
In the past, @Injectable had no side effects and existing Angular code is
therefore littered with @Injectable usage on classes which are not intended
to be injected.
A common example is:
@Injectable()
class Foo {
constructor(private notInjectable: string) {}
}
and somewhere else:
providers: [{provide: Foo, useFactory: ...})
Here, there is no need for Foo to be injectable - indeed, it's impossible
for the DI system to create an instance of it, as it has a non-injectable
constructor. The provider configures a factory for the DI system to be
able to create instances of Foo.
Adding @Injectable in Ivy signifies that the class's own constructor, and
not a provider, determines how the class will be created.
This commit adds logic to compile classes which are marked with @Injectable
but are otherwise not injectable, and create an ngInjectableDef field with
a factory function that throws an error. This way, existing code in the wild
continues to compile, but if someone attempts to use the injectable it will
fail with a useful error message.
In the case where strictInjectionParameters is set to true, a compile-time
error is thrown instead of the runtime error, as ngtsc has enough
information to determine when injection couldn't possibly be valid.
PR Close #28523
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| aio | ||
| docs | ||
| integration | ||
| modules | ||
| packages | ||
| scripts | ||
| third_party | ||
| tools | ||
| .bazelignore | ||
| .bazelrc | ||
| .clang-format | ||
| .editorconfig | ||
| .gitattributes | ||
| .gitignore | ||
| .mailmap | ||
| .nvmrc | ||
| BUILD.bazel | ||
| CHANGELOG.md | ||
| CODE_OF_CONDUCT.md | ||
| CONTRIBUTING.md | ||
| LICENSE | ||
| README.md | ||
| WORKSPACE | ||
| browser-providers.conf.js | ||
| gulpfile.js | ||
| index.bzl | ||
| karma-js.conf.js | ||
| package.json | ||
| protractor-perf.conf.js | ||
| shims_for_IE.js | ||
| test-events.js | ||
| test-main.js | ||
| tslint.json | ||
| yarn.lock | ||
| yarn.lock.readme.md | ||
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