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      1 //===--- MacroBuilder.h - CPP Macro building utility ------------*- C++ -*-===//
      2 //
      3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
      4 // See https://llvm.org/LICENSE.txt for license information.
      5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
      6 //
      7 //===----------------------------------------------------------------------===//
      8 ///
      9 /// \file
     10 /// Defines the clang::MacroBuilder utility class.
     11 ///
     12 //===----------------------------------------------------------------------===//
     13 
     14 #ifndef LLVM_CLANG_BASIC_MACROBUILDER_H
     15 #define LLVM_CLANG_BASIC_MACROBUILDER_H
     16 
     17 #include "clang/Basic/LLVM.h"
     18 #include "llvm/ADT/Twine.h"
     19 #include "llvm/Support/raw_ostream.h"
     20 
     21 namespace clang {
     22 
     23 class MacroBuilder {
     24   raw_ostream &Out;
     25 public:
     26   MacroBuilder(raw_ostream &Output) : Out(Output) {}
     27 
     28   /// Append a \#define line for macro of the form "\#define Name Value\n".
     29   void defineMacro(const Twine &Name, const Twine &Value = "1") {
     30     Out << "#define " << Name << ' ' << Value << '\n';
     31   }
     32 
     33   /// Append a \#undef line for Name.  Name should be of the form XXX
     34   /// and we emit "\#undef XXX".
     35   void undefineMacro(const Twine &Name) {
     36     Out << "#undef " << Name << '\n';
     37   }
     38 
     39   /// Directly append Str and a newline to the underlying buffer.
     40   void append(const Twine &Str) {
     41     Out << Str << '\n';
     42   }
     43 };
     44 
     45 }  // end namespace clang
     46 
     47 #endif
     48