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Support overload ambiguity resolution for callable references by expected type.

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Resolve callable references taking into account expected callable types.

This affects call resolution procedure (resolve 'foo' in for 'foo(::bar)') similar to the approach used for function literals:

* During "shape arguments" phase of call resolution, callable references are resolved in independent context without expected type. If the callable reference is ambiguous, its shape type is a function placeholder type without parameter types and return type information. Otherwise, it is a reflection type for the resolved function or property. Upper-level call is resolved without taking into account ambiguous callable references.

* During "complete call" phase of call resolution, resolve callable reference arguments to actual descriptors (if possible), and update constraint system for the given call accordingly.

 #KT-6982 Fixed
 #KT-5780 Fixed
This commit is contained in:
Dmitry Petrov
2015-07-14 17:53:12 +03:00
parent b3a2ee2148
commit 6437a4bdc6
51 changed files with 1057 additions and 247 deletions
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compiler/testData/diagnostics/tests/callableReference/resolve/withVararg.txt
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package
internal val fn1: (kotlin.Int) -> kotlin.Unit
internal val fn2: (kotlin.IntArray) -> kotlin.Unit
internal val fn3: (kotlin.Int, kotlin.Int) -> kotlin.Unit
internal val fn4: (kotlin.Array<kotlin.String>) -> kotlin.Unit
internal fun foo(/*0*/ vararg ss: kotlin.String /*kotlin.Array<out kotlin.String>*/): kotlin.Unit
internal fun foo(/*0*/ i: kotlin.Int): kotlin.Unit
internal fun foo(/*0*/ vararg ii: kotlin.Int /*kotlin.IntArray*/): kotlin.Unit