Substantially alter the design of the Objective C type AST by introducing

ObjCObjectType, which is basically just a pair of
  one of {primitive-id, primitive-Class, user-defined @class}
with
  a list of protocols.
An ObjCObjectPointerType is therefore just a pointer which always points to
one of these types (possibly sugared).  ObjCInterfaceType is now just a kind
of ObjCObjectType which happens to not carry any protocols.

Alter a rather large number of use sites to use ObjCObjectType instead of
ObjCInterfaceType.  Store an ObjCInterfaceType as a pointer on the decl rather
than hashing them in a FoldingSet.  Remove some number of methods that are no
longer used, at least after this patch.

By simplifying ObjCObjectPointerType, we are now able to easily remove and apply
pointers to Objective-C types, which is crucial for a certain kind of ObjC++
metaprogramming common in WebKit.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@103870 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 14 insertions, 0 deletions

diff --git a/include/clang/AST/TypeLocBuilder.h b/include/clang/AST/TypeLocBuilder.h
index c3b1c68b1f..e729488e43 100644
--- a/include/clang/AST/TypeLocBuilder.h
+++ b/include/clang/AST/TypeLocBuilder.h
@@ -59,6 +59,20 @@ class TypeLocBuilder {
       grow(Requested);
   }
 
+  /// Pushes a copy of the given TypeLoc onto this builder.  The builder
+  /// must be empty for this to work.
+  void pushFullCopy(TypeLoc L) {
+#ifndef NDEBUG
+    assert(LastTy.isNull() && "pushing copy on non-empty TypeLocBuilder");
+    LastTy = L.getNextTypeLoc().getType();
+#endif
+    assert(Index == Capacity && "pushing copy on non-empty TypeLocBuilder");
+
+    unsigned Size = L.getFullDataSize();
+    TypeLoc Copy = pushImpl(L.getType(), Size);
+    memcpy(Copy.getOpaqueData(), L.getOpaqueData(), Size);
+  }
+
   /// Pushes space for a typespec TypeLoc.  Invalidates any TypeLocs
   /// previously retrieved from this builder.
   TypeSpecTypeLoc pushTypeSpec(QualType T) {