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//===- WithColor.h ----------------------------------------------*- C++ -*-===// // // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. // See https://llvm.org/LICENSE.txt for license information. // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception // //===----------------------------------------------------------------------===// #ifndef LLVM_SUPPORT_WITHCOLOR_H #define LLVM_SUPPORT_WITHCOLOR_H #include "llvm/ADT/StringRef.h" #include "llvm/Support/CommandLine.h" namespace llvm { extern cl::OptionCategory ColorCategory; class raw_ostream; // Symbolic names for various syntax elements. enum class HighlightColor { Address, String, Tag, Attribute, Enumerator, Macro, Error, Warning, Note, Remark }; /// An RAII object that temporarily switches an output stream to a specific /// color. class WithColor { raw_ostream &OS; bool DisableColors; public: /// To be used like this: WithColor(OS, HighlightColor::String) << "text"; /// @param OS The output stream /// @param S Symbolic name for syntax element to color /// @param DisableColors Whether to ignore color changes regardless of -color /// and support in OS WithColor(raw_ostream &OS, HighlightColor S, bool DisableColors = false); /// To be used like this: WithColor(OS, raw_ostream::Black) << "text"; /// @param OS The output stream /// @param Color ANSI color to use, the special SAVEDCOLOR can be used to /// change only the bold attribute, and keep colors untouched /// @param Bold Bold/brighter text, default false /// @param BG If true, change the background, default: change foreground /// @param DisableColors Whether to ignore color changes regardless of -color /// and support in OS WithColor(raw_ostream &OS, raw_ostream::Colors Color = raw_ostream::SAVEDCOLOR, bool Bold = false, bool BG = false, bool DisableColors = false) : OS(OS), DisableColors(DisableColors) { changeColor(Color, Bold, BG); } ~WithColor(); raw_ostream &get() { return OS; } operator raw_ostream &() { return OS; } template <typename T> WithColor &operator<<(T &O) { OS << O; return *this; } template <typename T> WithColor &operator<<(const T &O) { OS << O; return *this; } /// Convenience method for printing "error: " to stderr. static raw_ostream &error(); /// Convenience method for printing "warning: " to stderr. static raw_ostream &warning(); /// Convenience method for printing "note: " to stderr. static raw_ostream ¬e(); /// Convenience method for printing "remark: " to stderr. static raw_ostream &remark(); /// Convenience method for printing "error: " to the given stream. static raw_ostream &error(raw_ostream &OS, StringRef Prefix = "", bool DisableColors = false); /// Convenience method for printing "warning: " to the given stream. static raw_ostream &warning(raw_ostream &OS, StringRef Prefix = "", bool DisableColors = false); /// Convenience method for printing "note: " to the given stream. static raw_ostream ¬e(raw_ostream &OS, StringRef Prefix = "", bool DisableColors = false); /// Convenience method for printing "remark: " to the given stream. static raw_ostream &remark(raw_ostream &OS, StringRef Prefix = "", bool DisableColors = false); /// Determine whether colors are displayed. bool colorsEnabled(); /// Change the color of text that will be output from this point forward. /// @param Color ANSI color to use, the special SAVEDCOLOR can be used to /// change only the bold attribute, and keep colors untouched /// @param Bold Bold/brighter text, default false /// @param BG If true, change the background, default: change foreground WithColor &changeColor(raw_ostream::Colors Color, bool Bold = false, bool BG = false); /// Reset the colors to terminal defaults. Call this when you are done /// outputting colored text, or before program exit. WithColor &resetColor(); }; } // end namespace llvm #endif // LLVM_LIB_DEBUGINFO_WITHCOLOR_H