We had a weird (and problematic for me) situation before where
tuple initializations would not recursively finalize their tuple
elements when they were finalized. Making them do so runs afoul
of the poorly named Initialization::getSubInitializations(x,y,z)
method, which had nothing to do with the
Initialization::getSubInitializations() method. Rename the former
to "getSubInitializationsForTuple" to make it more clear what is
going on, and make it handle the finalization of the SingleElement
initialization when it explodes it.
No functionality change, this unblocks some cases definite init was
tripping over.
Swift SVN r7600
Generate union constructors as SIL functions using the new 'union' instruction. Change UnionTypeInfo::emitInjectionFunctionBody into UnionTypeInfo::emitInjection, which emits the union value to an explosion rather than emitting the scalar return directly, and use it to implement IRGen lowering of the 'union' instruction.
This breaks a few serialization tests because of mangler bugs handling generic unions, which I'll fix next.
Swift SVN r7559
This is a baby step toward eliminating GenericParamList from
PolymorphicFunctionType, fixing up the easy callers. No functionality
change.
Swift SVN r7370
Previously, TypeAliasDecl was used for typealiases, generic
parameters, and assocaited types, which is hideous and the source of
much confusion. Factor the latter two out into their own decl nodes,
with a common abstract base for "type parameters", and push these
nodes throughout the frontend.
No real functionality change, but this is a step toward uniquing
polymorphic types, among other things.
Swift SVN r7345
