This implementation change was originally proposed as part of Typed Forms, and will have major consequences for that project as described in the design doc. Submitting it separately will greatly simplify the risk of landing Typed Forms. This change should have no visible impact on normal users of FormControl.
See the Typed Forms design doc here: https://docs.google.com/document/d/1cWuBE-oo5WLtwkLFxbNTiaVQGNk8ipgbekZcKBeyxxo.
PR Close#44316
PR Close#44806
This new processor, named `mergeOverriddenImplementation`, allows Dgeni to produce correct documentation for symbols with overridden exported constructors. For example, in the following example, the implementation documentation will be used, including the constructor signature:
```
export const Foo: FooCtor = FooImpl as FooCtor;
```
This is a major improvement over the current situation, in which no constructor signature is documented whatsoever.
PR Close#44689
