Stage two of getting CFE top correct.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@39734 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Sema/SemaExprCXX.cpp b/Sema/SemaExprCXX.cpp
new file mode 100644
index 0000000..74be79a
--- /dev/null
+++ b/Sema/SemaExprCXX.cpp
@@ -0,0 +1,44 @@
+//===--- SemaExprCXX.cpp - Semantic Analysis for Expressions --------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file was developed by Bill Wendling and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+//  This file implements semantic analysis for C++ expressions.
+//
+//===----------------------------------------------------------------------===//
+
+#include "Sema.h"
+#include "clang/AST/ExprCXX.h"
+using namespace clang;
+
+/// ParseCXXCasts - Parse {dynamic,static,reinterpret,const}_cast's.
+Action::ExprResult
+Sema::ParseCXXCasts(SourceLocation OpLoc, tok::TokenKind Kind,
+                    SourceLocation LAngleBracketLoc, TypeTy *Ty,
+                    SourceLocation RAngleBracketLoc,
+                    SourceLocation LParenLoc, ExprTy *E,
+                    SourceLocation RParenLoc) {
+  CXXCastExpr::Opcode Op;
+
+  switch (Kind) {
+  default: assert(0 && "Unknown C++ cast!");
+  case tok::kw_const_cast:       Op = CXXCastExpr::ConstCast;       break;
+  case tok::kw_dynamic_cast:     Op = CXXCastExpr::DynamicCast;     break;
+  case tok::kw_reinterpret_cast: Op = CXXCastExpr::ReinterpretCast; break;
+  case tok::kw_static_cast:      Op = CXXCastExpr::StaticCast;      break;
+  }
+  
+  return new CXXCastExpr(Op, QualType::getFromOpaquePtr(Ty), (Expr*)E, OpLoc);
+}
+
+/// ParseCXXBoolLiteral - Parse {true,false} literals.
+Action::ExprResult
+Sema::ParseCXXBoolLiteral(SourceLocation OpLoc, tok::TokenKind Kind) {
+  assert((Kind != tok::kw_true || Kind != tok::kw_false) &&
+         "Unknown C++ Boolean value!");
+  return new CXXBoolLiteralExpr(Kind == tok::kw_true, OpLoc);
+}