Added prototype implementation of the DeclGroup, DeclGroupRef, and DeclGroupOwningRef classes.
Documentation and testing are pending.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@56611 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/DeclGroup.cpp b/lib/AST/DeclGroup.cpp
new file mode 100644
index 0000000..5987d5a
--- /dev/null
+++ b/lib/AST/DeclGroup.cpp
@@ -0,0 +1,59 @@
+//===--- DeclGroup.cpp - Classes for representing groups of Decls -*- C++ -*-==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defines the DeclGroup, DeclGroupRef, and OwningDeclGroup classes.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/DeclGroup.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/ASTContext.h"
+#include "llvm/Support/Allocator.h"
+
+using namespace clang;
+
+DeclGroup* DeclGroup::Create(ASTContext& C, unsigned numdecls, Decl** decls) {
+ unsigned size = sizeof(DeclGroup) + sizeof(Decl*) * numdecls;
+ unsigned alignment = llvm::AlignOf<DeclGroup>::Alignment;
+ void* mem = C.getAllocator().Allocate(size, alignment);
+ new (mem) DeclGroup(numdecls, decls);
+ return static_cast<DeclGroup*>(mem);
+}
+
+DeclGroup::DeclGroup(unsigned numdecls, Decl** decls) {
+ assert (numdecls > 0);
+ assert (decls);
+ memcpy(this+1, decls, numdecls * sizeof(*decls));
+}
+
+void DeclGroup::Destroy(ASTContext& C) {
+ Decl** Decls = (Decl**) this + 1;
+
+ for (unsigned i = 0; i < NumDecls; ++i)
+ Decls[i]->Destroy(C);
+
+ this->~DeclGroup();
+ C.getAllocator().Deallocate((void*) this);
+}
+
+DeclGroupOwningRef::~DeclGroupOwningRef() {
+ assert (ThePtr == 0 && "Destroy method not called.");
+}
+
+void DeclGroupOwningRef::Destroy(ASTContext& C) {
+ if (!ThePtr)
+ return;
+
+ if (getKind() == DeclKind)
+ reinterpret_cast<Decl*>(ThePtr)->Destroy(C);
+ else
+ reinterpret_cast<DeclGroup*>(ThePtr & ~Mask)->Destroy(C);
+
+ ThePtr = 0;
+}