RenderingSupport.h
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//===- RenderingSupport.h - output stream rendering support functions ----===//
//
// 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_COV_RENDERINGSUPPORT_H
#define LLVM_COV_RENDERINGSUPPORT_H
#include "llvm/Support/raw_ostream.h"
#include <utility>
namespace llvm {
/// A helper class that resets the output stream's color if needed
/// when destroyed.
class ColoredRawOstream {
ColoredRawOstream(const ColoredRawOstream &OS) = delete;
public:
raw_ostream &OS;
bool IsColorUsed;
ColoredRawOstream(raw_ostream &OS, bool IsColorUsed)
: OS(OS), IsColorUsed(IsColorUsed) {}
ColoredRawOstream(ColoredRawOstream &&Other)
: OS(Other.OS), IsColorUsed(Other.IsColorUsed) {
// Reset the other IsColorUsed so that the other object won't reset the
// color when destroyed.
Other.IsColorUsed = false;
}
~ColoredRawOstream() {
if (IsColorUsed)
OS.resetColor();
}
};
template <typename T>
inline raw_ostream &operator<<(const ColoredRawOstream &OS, T &&Value) {
return OS.OS << std::forward<T>(Value);
}
/// Change the color of the output stream if the `IsColorUsed` flag
/// is true. Returns an object that resets the color when destroyed.
inline ColoredRawOstream colored_ostream(raw_ostream &OS,
raw_ostream::Colors Color,
bool IsColorUsed = true,
bool Bold = false, bool BG = false) {
if (IsColorUsed)
OS.changeColor(Color, Bold, BG);
return ColoredRawOstream(OS, IsColorUsed);
}
} // namespace llvm
#endif // LLVM_COV_RENDERINGSUPPORT_H