Pete Bacon Darwin 1a0e500eea fix(ivy): support sub-class services that only inherit @Injectable (#30388)
In View engine it is possible to instantiate a service that that has no
`@Injectable` decorator as long as it satisfies one of:

1) It has no dependencies and so a constructor with no parameters.
This is already supported in Ivy.
2) It has no constructor of its own and sub-classes a service which has
dependencies but has its own `@Injectable` decorator. This second
scenario was broken in Ivy.

In Ivy, previous to this commit, if a class to be instantiated did not have
its own `@Injectable` decorator and did not provide a constructor of
its own, then it would be created using `new` with no arguments -
i.e. falling back to the first scenario.

After this commit Ivy correctly uses the `ngInjectableDef` inherited
from the super-class to provide the `factory` for instantiating the
sub-class.

FW-1314

PR Close #30388
2019-05-15 14:10:33 -07:00
2019-01-11 11:15:59 -08:00

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