## Inheritance Semantics:
Decorators:
1) list the decorators of the class and its parents in the ancestor first order
2) only use the last decorator of each kind (e.g. @Component / ...)
Constructor parameters:
If a class inherits from a parent class and does not declare
a constructor, it inherits the parent class constructor,
and with it the parameter metadata of that parent class.
Lifecycle hooks:
Follow the normal class inheritance model,
i.e. lifecycle hooks of parent classes will be called
even if the method is not overwritten in the child class.
## Example
E.g. the following is a valid use of inheritance and it will
also inherit all metadata:
```
@Directive({selector: 'someDir'})
class ParentDirective {
constructor(someDep: SomeDep) {}
ngOnInit() {}
}
class ChildDirective extends ParentDirective {}
```
Closes#11606Closes#12892
The change looks bigger than it really is because I reordered the properties to match other tsconfigs we have.
The only real change is removal of sourceRoot property.
Fixes#13040
* With non-static ngUpgrade apps, callbacks to `whenStable` were being invoked with the wrong
context
* With non-static ngUpgrade apps, `resumeBootstrap` was being run outside the NgZone
* Remove redundent `whenStableContext` variable
Neither of the first two problems were actually causing bugs (as far as I know), but they *might*
have caused problems in the future.
Inspired by https://github.com/angular/angular/pull/12910, but for non-static apps.
- `NgHost` to `CompilerHost`
- `AotCompilerHost.resolveFileToImport` to `AotCompilerHost.fileNameToModuleName`
- `AotCompilerHoset.resolveImportToFile` to `AotCompilerHost.moduleNameToFileName`
This is needed to resolve symbols without `.d.ts` files.
This bumps the version of the metadata from 1 to 2.
This adds logic into `ng_host.ts` to automatically upgrade
version 1 to version 2 metadata by adding the exported symbols
from the `.d.ts` file.
Tobias Bosch
Tim Blair
PatrickJS
Pawel Kozlowski
Matias Niemelä
vsavkin
Igor Minar
Bowen Ni
Bowen Ni
Chuck Jazdzewski
Pete Bacon Darwin
Brian Michalski
Sammy Jelin
Brady Isom