1//===--- MacroBuilder.h - CPP Macro building utility ------------*- C++ -*-===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9///
10/// \file
11/// \brief Defines the clang::MacroBuilder utility class.
12///
13//===----------------------------------------------------------------------===//
14
15#ifndef LLVM_CLANG_BASIC_MACROBUILDER_H
16#define LLVM_CLANG_BASIC_MACROBUILDER_H
17
18#include "clang/Basic/LLVM.h"
19#include "llvm/ADT/Twine.h"
20#include "llvm/Support/raw_ostream.h"
21
22namespace clang {
23
24class MacroBuilder {
25  raw_ostream &Out;
26public:
27  MacroBuilder(raw_ostream &Output) : Out(Output) {}
28
29  /// Append a \#define line for macro of the form "\#define Name Value\n".
30  void defineMacro(const Twine &Name, const Twine &Value = "1") {
31    Out << "#define " << Name << ' ' << Value << '\n';
32  }
33
34  /// Append a \#undef line for Name.  Name should be of the form XXX
35  /// and we emit "\#undef XXX".
36  void undefineMacro(const Twine &Name) {
37    Out << "#undef " << Name << '\n';
38  }
39
40  /// Directly append Str and a newline to the underlying buffer.
41  void append(const Twine &Str) {
42    Out << Str << '\n';
43  }
44};
45
46}  // end namespace clang
47
48#endif
49