clang  6.0.0svn
MacroBuilder.h
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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 
22 namespace clang {
23 
24 class MacroBuilder {
25  raw_ostream &Out;
26 public:
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
void undefineMacro(const Twine &Name)
Append a #undef line for Name.
Definition: MacroBuilder.h:36
Forward-declares and imports various common LLVM datatypes that clang wants to use unqualified...
void append(const Twine &Str)
Directly append Str and a newline to the underlying buffer.
Definition: MacroBuilder.h:41
Dataflow Directional Tag Classes.
MacroBuilder(raw_ostream &Output)
Definition: MacroBuilder.h:27
void defineMacro(const Twine &Name, const Twine &Value="1")
Append a #define line for macro of the form "\#define Name Value\n".
Definition: MacroBuilder.h:30