Move the MacroBuilder utilitiy to its own header. Update references.

Comments and/or improvements to the documentation are welcome.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@93982 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 46 insertions, 0 deletions

diff --git a/include/clang/Basic/MacroBuilder.h b/include/clang/Basic/MacroBuilder.h
new file mode 100644
index 0000000000..e46f424835
--- /dev/null
+++ b/include/clang/Basic/MacroBuilder.h
@@ -0,0 +1,46 @@
+//===--- MacroBuilder.h - CPP Macro building utilitiy -----------*- 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 MacroBuilder utility class.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_BASIC_MACROBUILDER_H
+#define LLVM_CLANG_BASIC_MACROBUILDER_H
+
+#include "llvm/ADT/Twine.h"
+#include "llvm/Support/raw_ostream.h"
+
+namespace clang {
+
+class MacroBuilder {
+  llvm::raw_ostream &Out;
+public:
+  MacroBuilder(llvm::raw_ostream &Output) : Out(Output) {}
+
+  /// Append a #define line for macro of the form "#define Name Value\n".
+  void defineMacro(const llvm::Twine &Name, const llvm::Twine &Value = "1") {
+    Out << "#define " << Name << ' ' << Value << '\n';
+  }
+
+  /// Append a #undef line for Name.  Name should be of the form XXX
+  /// and we emit "#undef XXX".
+  void undefineMacro(const llvm::Twine &Name) {
+    Out << "#undef " << Name << '\n';
+  }
+
+  /// Directly append Str and a newline to the underlying buffer.
+  void append(const llvm::Twine &Str) {
+    Out << Str << '\n';
+  }
+};
+
+}  // end namespace clang
+
+#endif