Implement support for member pointers under the Microsoft C++ ABI in the

AST library.

This also adds infrastructure for supporting multiple C++ ABIs in the AST.

llvm-svn: 111117

1 files changed, 38 insertions, 0 deletions

diff --git a/clang/lib/AST/CXXABI.h b/clang/lib/AST/CXXABI.h
new file mode 100644
index 00000000000..8781bd7c75f
--- /dev/null
+++ b/clang/lib/AST/CXXABI.h
@@ -0,0 +1,38 @@
+//===----- CXXABI.h - Interface to C++ ABIs ---------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides an abstract class for C++ AST support. Concrete
+// subclasses of this implement AST support for specific C++ ABIs.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_AST_CXXABI_H
+#define LLVM_CLANG_AST_CXXABI_H
+
+namespace clang {
+
+class ASTContext;
+class MemberPointerType;
+
+/// Implements C++ ABI-specific semantic analysis functions.
+class CXXABI {
+public:
+  virtual ~CXXABI();
+
+  /// Returns the size of a member pointer in multiples of the target
+  /// pointer size.
+  virtual unsigned getMemberPointerSize(const MemberPointerType *MPT) const = 0;
+};
+
+/// Creates an instance of a C++ ABI class.
+CXXABI *CreateItaniumCXXABI(ASTContext &Ctx);
+CXXABI *CreateMicrosoftCXXABI(ASTContext &Ctx);
+}
+
+#endif