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41 lines
845 B
41 lines
845 B
#include <cstddef>
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#include <memory>
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#include <type_traits>
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#include <utility>
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namespace std
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{
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template<class T> struct _Unique_if
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{
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typedef unique_ptr<T> _Single_object;
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};
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template<class T> struct _Unique_if<T[]>
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{
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typedef unique_ptr<T[]> _Unknown_bound;
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};
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template<class T, size_t N> struct _Unique_if<T[N]>
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{
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typedef void _Known_bound;
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};
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template<class T, class... Args>
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typename _Unique_if<T>::_Single_object
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make_unique(Args&&... args)
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{
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return unique_ptr<T>(new T(std::forward<Args>(args)...));
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}
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template<class T>
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typename _Unique_if<T>::_Unknown_bound
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make_unique(size_t n)
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{
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typedef typename remove_extent<T>::type U;
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return unique_ptr<T>(new U[n]());
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}
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template<class T, class... Args>
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typename _Unique_if<T>::_Known_bound
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make_unique(Args&&...) = delete;
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}
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