Check in a rudimentary FullExpr class that isn't used anywhere yet. Rename Action::FullExpr to Action::MakeFullExpr to avoid name clashes.

llvm-svn: 91494

1 files changed, 42 insertions, 0 deletions

diff --git a/clang/lib/AST/FullExpr.cpp b/clang/lib/AST/FullExpr.cpp
new file mode 100644
index 00000000000..39c3bad0a77
--- /dev/null
+++ b/clang/lib/AST/FullExpr.cpp
@@ -0,0 +1,42 @@
+//===--- FullExpr.cpp - C++ full expression class ---------------*- 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 FullExpr interface, to be used for type safe handling
+//  of full expressions.
+//
+//  Full expressions are described in C++ [intro.execution]p12.
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/FullExpr.h"
+#include "llvm/Support/AlignOf.h"
+using namespace clang;
+
+FullExpr FullExpr::Create(ASTContext &Context, Expr *SubExpr, 
+                          CXXTemporary **Temporaries, unsigned NumTemporaries) {
+    FullExpr E;
+    
+    if (!NumTemporaries) {
+        E.SubExpr = SubExpr;
+        return E;
+    }
+    
+    unsigned Size = sizeof(FullExpr) 
+        + sizeof(CXXTemporary *) * NumTemporaries;
+    
+    unsigned Align = llvm::AlignOf<ExprAndTemporaries>::Alignment;
+    ExprAndTemporaries *ET = 
+        static_cast<ExprAndTemporaries *>(Context.Allocate(Size, Align));
+    
+    ET->SubExpr = SubExpr;
+    std::copy(Temporaries, Temporaries + NumTemporaries, ET->begin());
+    
+    return E;
+}