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31 lines
657 B
C++
31 lines
657 B
C++
//! Shims for std:: functions that aren't available in the current C++ versions
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//! we target.
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#ifndef STDSHIMS_H
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#define STDSHIMS_H
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#include <type_traits>
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#include <utility>
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#if (__cplusplus >= 201703L || _MSC_VER >= 1914)
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#ifndef _MSC_VER
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#warning "This part of this file should now be removed! The functions it provides are part of the C++17 standard."
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#endif
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using std::as_const;
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#else
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/// Shim for http://en.cppreference.com/w/cpp/utility/as_const
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template <typename T>
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constexpr typename std::add_const<T>::type& as_const(T& t) noexcept
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{
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return t;
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}
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template <typename T>
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void as_const(const T&&) = delete;
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#endif
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#endif // include guard
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