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61 lines
1.8 KiB
C++
61 lines
1.8 KiB
C++
//===- RenderingSupport.h - output stream rendering support functions ----===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef LLVM_COV_RENDERINGSUPPORT_H
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#define LLVM_COV_RENDERINGSUPPORT_H
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#include "llvm/Support/raw_ostream.h"
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#include <utility>
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namespace llvm {
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/// A helper class that resets the output stream's color if needed
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/// when destroyed.
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class ColoredRawOstream {
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ColoredRawOstream(const ColoredRawOstream &OS) = delete;
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public:
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raw_ostream &OS;
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bool IsColorUsed;
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ColoredRawOstream(raw_ostream &OS, bool IsColorUsed)
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: OS(OS), IsColorUsed(IsColorUsed) {}
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ColoredRawOstream(ColoredRawOstream &&Other)
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: OS(Other.OS), IsColorUsed(Other.IsColorUsed) {
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// Reset the other IsColorUsed so that the other object won't reset the
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// color when destroyed.
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Other.IsColorUsed = false;
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}
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~ColoredRawOstream() {
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if (IsColorUsed)
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OS.resetColor();
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}
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};
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template <typename T>
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inline raw_ostream &operator<<(const ColoredRawOstream &OS, T &&Value) {
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return OS.OS << std::forward<T>(Value);
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}
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/// Change the color of the output stream if the `IsColorUsed` flag
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/// is true. Returns an object that resets the color when destroyed.
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inline ColoredRawOstream colored_ostream(raw_ostream &OS,
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raw_ostream::Colors Color,
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bool IsColorUsed = true,
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bool Bold = false, bool BG = false) {
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if (IsColorUsed)
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OS.changeColor(Color, Bold, BG);
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return ColoredRawOstream(OS, IsColorUsed);
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}
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} // namespace llvm
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#endif // LLVM_COV_RENDERINGSUPPORT_H
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