Support overload ambiguity resolution for callable references by expected type.

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

									
										compiler/testData/diagnostics/tests/callableReference/resolve/withGenericFun.kt
									
Vendored

		+10
		
												View File
												
				@@ -0,0 +1,10 @@

				// !DIAGNOSTICS: -UNUSED_PARAMETER

				fun <T, R> apply(x: T, f: (T) -> R): R = f(x)

				fun foo(i: Int) {}

				fun foo(s: String) {}

				val x1 = apply(1, ::foo)

				val x2 = apply("hello", ::foo)

				val x3 = apply(true, ::<!NONE_APPLICABLE!>foo<!>)