For some synthetic methods from compiled Kotlin classes, it is
not possible to find the PsiElement, when navigating to declaration
in the IDE.
For other methods it works like this:
1. There is a SourceElement with a psi inside
2. Or for K1, the element is searched in the decompiled text
(see ByDescriptorIndexer),
3. Or for K2, the element is searched by Stub taken from metadata
(see FirDeserializedDeclarationSourceProvider)
However, these approaches do not apply to synthetic methods which have
no SourceElement and are not written into decompiled text and metadata.
These are methods values, valueOf, entries from enum and
copy, equals, hashCode, toString from data classes.
Therefore, it was decided to handle their cases separately
at the resolve stage.
Tests (in idea repository):
- org.jetbrains.kotlin.idea.resolve.ReferenceResolveWithLibTestGenerated#testDataClassSyntheticMethods
- org.jetbrains.kotlin.idea.resolve.ReferenceResolveWithLibTestGenerated#testEnumSyntheticMethods
- org.jetbrains.kotlin.idea.fir.resolve.FirReferenceResolveWithLibTestGenerated#testDataClassSyntheticMethods
- org.jetbrains.kotlin.idea.fir.resolve.FirReferenceResolveWithLibTestGenerated#testEnumSyntheticMethods
^KTIJ-24413 Fixed
Roman Efremov
d120d83d60