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bdca8b01d2
#pragma once is a widely supported compiler pragma, even though it is not part of the C++ standard. Many of the issues keeping #pragma once from being standardized (distributed filesystems, build farms, hard links, etc.) do not apply to CMake - it is easy to build CMake on a single machine. CMake also does not install any header files which can be consumed by other projects (though cmCPluginAPI.h has been deliberately omitted from this conversion in case anyone is still using it.) Finally, #pragma once has been required to build CMake since at least August 2017 (7f29bbe6 enabled server mode unconditionally, which had been using #pragma once since September 2016 (b13d3e0d)). The fact that we now require C++11 filters out old compilers, and it is unlikely that there is a compiler which supports C++11 but does not support #pragma once.
35 lines
977 B
C++
35 lines
977 B
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file Copyright.txt or https://cmake.org/licensing for details. */
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#pragma once
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#include "cmConfigure.h" // IWYU pragma: keep
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#include <string>
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/** \class cmPathLabel
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* \brief Helper class for text based labels
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*
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* cmPathLabel is extended in different classes to act as an inheritable
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* enum. Comparisons are done on a precomputed Jenkins hash of the string
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* label for indexing and searchig.
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*/
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class cmPathLabel
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{
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public:
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cmPathLabel(std::string label);
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// The comparison operators are only for quick sorting and searching and
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// in no way imply any lexicographical order of the label
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bool operator<(const cmPathLabel& l) const;
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bool operator==(const cmPathLabel& l) const;
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const std::string& GetLabel() const { return this->Label; }
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const unsigned int& GetHash() const { return this->Hash; }
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protected:
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cmPathLabel();
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std::string Label;
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unsigned int Hash;
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};
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