This was causing the importer to complain about not being able to map
'dispatch_sync' to 'DispatchQueue.sync(self:execute:)', but only when
building the PCM for our mock Dispatch. That meant that it depended on
the test order whether we'd see issues---if the first test to build
the module didn't check for warnings in other files, it would slip by.
This was usually blocks_parse.swift.
rdar://problem/30475805
This is usually a more helpful type than our alternative, 'NSObject', although
it's not Equatable or Hashable. Since pretty much everything from Objective-C
inherits from NSObject, though, keeping the protocol qualifiers is much more
useful from a type-safety perspective.
The particular benefit for this comes with a change to libdispatch's <os/object.h>:
with dispatch types all declaring that they inherit from NSObjectProtocol, the
canonical form of the imported 'dispatch_queue_t' is now just a simple protocol
reference. That's type-safe as above, but is also a type that can be extended.
rdar://problem/16213421
Swift SVN r30100
We have a module map referring to it as dispatch.h, and
this capitalization matches the system, so let's go with it.
Fixes running test/ClangModules/blocks_parse.swift on
case-sensitive file systems. Apparently I'm the only
person building on a case-sensitive file system.
Swift SVN r23380
