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28 lines
962 B
C++
28 lines
962 B
C++
/* Distributed under the OSI-approved BSD 3-Clause License. See accompanying
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file LICENSE.rst or https://cmake.org/licensing for details. */
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#define CMDURATION_CPP
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#include "cmDuration.h"
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template <typename T>
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T cmDurationTo(cmDuration duration)
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{
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/* This works because the comparison operators for duration rely on
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* std::common_type.
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* So for example duration<int>::max() gets promoted to a duration<double>,
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* which can then be safely compared.
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*/
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if (duration >= std::chrono::duration<T>::max()) {
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return std::chrono::duration<T>::max().count();
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}
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if (duration <= std::chrono::duration<T>::min()) {
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return std::chrono::duration<T>::min().count();
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}
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// Ensure number of seconds by defining ratio<1>
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return std::chrono::duration_cast<std::chrono::duration<T, std::ratio<1>>>(
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duration)
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.count();
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}
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template int cmDurationTo<int>(cmDuration);
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template unsigned int cmDurationTo<unsigned int>(cmDuration);
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