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[FIR] Resolve elvis call as special synthetic call

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Before that commit we desugared `a ?: b` as

when (val elvis = a) {
    null -> b
    else -> elvis
}

It was incorrect, because `a` should be resolved in dependent mode,
  but when it was `elvis` initializer it was resolved in independent
  mode, so we can't infer type for `a` in some complex cases
This commit is contained in:
Dmitriy Novozhilov
2020-06-30 15:31:24 +03:00
parent b49b3245af
commit 102c9c08d0
48 changed files with 1560 additions and 1828 deletions
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compiler/testData/diagnostics/tests/resolve/specialConstructions/inferenceForElvis.fir.kt
Vendored
+2 -2
View File
@@ -3,6 +3,6 @@
fun <T: Any> foo(f: (T) -> Unit): T? = null // T is used only as return type
fun test() {
val x = foo { it checkType { <!INAPPLICABLE_CANDIDATE!>_<!><String>() }} ?: "" // foo() is inferred as foo<String>, which isn't very good
val y: Any = foo { it checkType { _<Any>() } } ?: "" // but for now it's fixed by specifying expected type
val x = foo { it checkType { _<String>() }} ?: "" // foo() is inferred as foo<String>, which isn't very good
val y: Any = foo { <!DEBUG_INFO_EXPRESSION_TYPE("kotlin.String")!>it<!> checkType { <!INAPPLICABLE_CANDIDATE!>_<!><Any>() } } ?: "" // but for now it's fixed by specifying expected type
}