Implement the Objective-C 'instancetype' type, which is an alias of
'id' that can be used (only!) via a contextual keyword as the result
type of an Objective-C message send. 'instancetype' then gives the
method a related result type, which we have already been inferring for
a variety of methods (new, alloc, init, self, retain). Addresses
<rdar://problem/9267640>.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@139275 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index fce593f..2bf172d 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -599,6 +599,7 @@
.Case("objc_arc", LangOpts.ObjCAutoRefCount)
.Case("objc_arc_weak", LangOpts.ObjCAutoRefCount &&
LangOpts.ObjCRuntimeHasWeak)
+ .Case("objc_instancetype", LangOpts.ObjC2)
.Case("objc_nonfragile_abi", LangOpts.ObjCNonFragileABI)
.Case("objc_weak_class", LangOpts.ObjCNonFragileABI)
.Case("ownership_holds", true)