1 //===- RenderingSupport.h - output stream rendering support functions ----===// 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 #ifndef LLVM_COV_RENDERINGSUPPORT_H 11 #define LLVM_COV_RENDERINGSUPPORT_H 12 13 #include "llvm/Support/raw_ostream.h" 14 #include <utility> 15 16 namespace llvm { 17 18 /// \brief A helper class that resets the output stream's color if needed 19 /// when destroyed. 20 class ColoredRawOstream { 21 ColoredRawOstream(const ColoredRawOstream &OS) = delete; 22 23 public: 24 raw_ostream &OS; 25 bool IsColorUsed; 26 27 ColoredRawOstream(raw_ostream &OS, bool IsColorUsed) 28 : OS(OS), IsColorUsed(IsColorUsed) {} 29 30 ColoredRawOstream(ColoredRawOstream &&Other) 31 : OS(Other.OS), IsColorUsed(Other.IsColorUsed) { 32 // Reset the other IsColorUsed so that the other object won't reset the 33 // color when destroyed. 34 Other.IsColorUsed = false; 35 } 36 37 ~ColoredRawOstream() { 38 if (IsColorUsed) 39 OS.resetColor(); 40 } 41 }; 42 43 template <typename T> 44 inline raw_ostream &operator<<(const ColoredRawOstream &OS, T &&Value) { 45 return OS.OS << std::forward<T>(Value); 46 } 47 48 /// \brief Change the color of the output stream if the `IsColorUsed` flag 49 /// is true. Returns an object that resets the color when destroyed. 50 inline ColoredRawOstream colored_ostream(raw_ostream &OS, 51 raw_ostream::Colors Color, 52 bool IsColorUsed = true, 53 bool Bold = false, bool BG = false) { 54 if (IsColorUsed) 55 OS.changeColor(Color, Bold, BG); 56 return ColoredRawOstream(OS, IsColorUsed); 57 } 58 } 59 60 #endif // LLVM_COV_RENDERINGSUPPORT_H 61
