Alexander Udalov f290f1be68 Initial support of type inference for callable references ...

There are two main changes here:

- In CallCompleter, there was a bug: we assumed that the return type of a
  candidate must be a subtype of the expected type and were adding a
  corresponding constraint to the system. However, this is not true for
  callable references where the type of the expression is KFunctionN<...> and
  the return type of the candidate must be a subtype of the _last generic
  argument_ of the functional type.
- In CandidateResolver, we use a more correct (although still not precise)
  heuristic to determine if a candidate fits based on the non-substituted type
  of the callable reference expression which it would produce.

This can be further improved, see TODOs in CallCompleter. Also this does not
influence resolution of callable references being passed as arguments to
generic calls (that happens in GenericCandidateResolver)

 #KT-10968 Fixed
 #KT-11075 Fixed
 #KT-12286 Fixed
 #KT-12963 Open
 #KT-12964 Open

2016-07-04 15:42:35 +03:00

..

kt10968.kt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00

kt10968.txt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00

kt11075.kt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00

kt11075.txt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00

kt12286.kt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00

kt12286.txt

Initial support of type inference for callable references

2016-07-04 15:42:35 +03:00