Serialize class names as qualified names in the string table, not as
simple strings. Otherwise NameResolverImpl crashes on deserialization
because it expects that all class names are indices into QualifiedName
table
This fixes KT-17001 because now 'header' modifier is loaded correctly
for deserialized members and the standard disambiguation in
OverloadingConflictResolver.compareCallsByUsedArguments takes place,
where header members are discriminated against the corresponding impl
members
#KT-17001 Fixed
Instead of requiring to pass it in SerializerExtensionBase's
constructor, pass it always in serializePackage. This is more
straightforward and helps in a situation where one SerializerExtension
instance is used for the whole module, not one per-package
Since now `suspend (Int) -> String` will be serialized as `(Int, Continuation<String>) -> Any?` + suspend flag.
Before this change such type serialized like this: Function2<Int, String> + suspend flag. And yes, type `Function2<Int, String>` isn't correct, because Function2 expect 3 type arguments.
We have special logic for this case and we deserialize such error-written types correctly.
(cherry picked from commit 3518cbe)
Note that now DeserializedClassDescriptor.getSealedSubclasses works a lot
faster than before, for all newly compiled sealed classes except empty ones. It
may be optimized further if we look at the metadata version of the file the
class was loaded from, however it's not easy currently because
DeserializedClassDescriptor is declared in common (non-JVM) code and has no
direct access to the binary version information.
This will also allow to add a reflection API to get subclasses of a sealed
class
#KT-12795 Fixed
'SuspendFunction$n' class descriptors are created on demand by KotlinBuiltIns (and cached).
On serialization, types constructed with 'SuspendFunction$n' are written as 'Function$n' with extra flag (SUSPEND_TYPE).
On deserialization, corresponding 'SuspendFunction$n' classes are used.
Do not serialize everything in the same package to the same file (as is done
for built-ins) because this approach is unfriendly to incremental compilation,
which is going to be supported in the future. Instead, similarly to JVM
serialize each class to its own file, and each source file with top-level
callables/typealiases to its own file.
E.g. if a file named test.kt contains a class Foo and some
functions/properties, the output will contain two files: TestKt.kotlin_metadata
and Foo.kotlin_metadata. Each one of this files contains the serialized
BuiltIns message (see builtins.proto)
This is needed to get rid of two unused bits: Flags.RESERVED_1 and
Flags.RESERVED_2. The old flags are still there temporarily because of the
bootstrap dependency on built-ins. Soon the old flags will be dropped and the
current flags will be transformed to the new format
Alexander Udalov