- An enum entry's body is an initializer with members only accessible
within that body. Because users of the Analysis API might want to
analyze the members of the enum entry initializer, we expose this
initializer via `KtEnumEntrySymbol`. The initializer only exists if
the enum entry has a body.
- We already have some usages of the initializer inside symbol light
classes, which generate a light class for each enum entry, which
includes the enum entry's hidden members.
- To hide the implementation detail that initializers are anonymous
objects, `KtEnumEntryInitializerSymbol` is simply a
`KtSymbolWithMembers`.
- The advantage of making it a `KtSymbolWithMembers`, instead of
providing a custom way to get a member scope, is that we can pass
around the initializer easily, e.g. in `KtEnumEntrySymbolRenderer`.
- We implement `KtEnumEntryInitializerSymbol` directly as a
`KtFirAnonymousObjectSymbol` without a wrapper. This has a few
advantages:
1. We can directly benefit from the anonymous object symbol being a
`KtSymbolWithMembers`, so we don't have to handle enum entry
initializers specially in e.g. `KtFirScopeProvider`.
2. We don't have to implement a new symbol restoration mechanism for
the initializer.
3. This implementation matches the actual FIR tree structure (with a
simplification that the connecting anonymous object expression
between the enum entry and the initializing anonymous object is
omitted).
^KT-61425 fixed
Jinseong Jeon