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// This file defines the MacroBuilder utility class. 11// 12//===----------------------------------------------------------------------===// 13 14#ifndef LLVM_CLANG_BASIC_MACROBUILDER_H 15#define LLVM_CLANG_BASIC_MACROBUILDER_H 16 17#include "llvm/ADT/Twine.h" 18#include "llvm/Support/raw_ostream.h" 19 20namespace clang { 21 22class MacroBuilder { 23 raw_ostream &Out; 24public: 25 MacroBuilder(raw_ostream &Output) : Out(Output) {} 26 27 /// Append a #define line for macro of the form "#define Name Value\n". 28 void defineMacro(const Twine &Name, const Twine &Value = "1") { 29 Out << "#define " << Name << ' ' << Value << '\n'; 30 } 31 32 /// Append a #undef line for Name. Name should be of the form XXX 33 /// and we emit "#undef XXX". 34 void undefineMacro(const Twine &Name) { 35 Out << "#undef " << Name << '\n'; 36 } 37 38 /// Directly append Str and a newline to the underlying buffer. 39 void append(const Twine &Str) { 40 Out << Str << '\n'; 41 } 42}; 43 44} // end namespace clang 45 46#endif 47