Slava Pestov 4e4d281aa7 stdlib: Rework swift_typeName() to use _swift_buildDemanglingForMetadata() ...

Previously we had two separate mechanisms to turn a metatype
into a string. The swift_typeName() function was used to print
the metatype in a human-readable fashion, whereas the
_swift_buildDemanglingForMetadata() was used when naming
generated generic Objective-C classes.

Unify them, since what swift_typeName() does is redundant;
instead of going directly from the metatype to a human-readable
string, we can get the mangling, and print that using the
demangler.

This fixes some issues with unnecessary parenthesis when
printing function types, and also allows Objective-C classes
to be instantiated with nested generic types as parameters.

2016-11-18 00:39:14 -08:00

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