sakura_stl/stl_construct.h at master · eternalsakura/sakura_stl · GitHub

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//
// Created by sakura on 2020/5/6.
//

#ifndef SAKURA_STL_STL_CONSTRUCT_H
#define SAKURA_STL_STL_CONSTRUCT_H

#include <new>
#include "stl_config.h"
#include "type_traits.h"
#include "stl_iterator_base.h"
__STL_BEGIN_NAMESPACE

    template<class _T1, class _T2>
    inline void _Construct(_T1 *__p, const _T2 &__value) {
        new((void *) __p) _T1(__value);
    }

    template<class _T1>
    inline void _Construct(_T1 *__p) {
        new((void *) __p) _T1();
    }

    template<class _Tp>
    void destroy_one(_Tp *, __true_type) {}

    template<class _Tp>
    void destroy_one(_Tp *pointer, __false_type) {
        if (pointer != nullptr) {
            pointer->~Tp();
        }
    }

    template<class _Tp>
    inline void _Destroy(_Tp *__pointer) {
        destroy_one(__pointer, typename __type_traits<_Tp>::has_trivial_destructor());
//        __pointer->~Tp();
    }

    template<class _ForwardIterator>
    void __destroy_aux(_ForwardIterator __first, _ForwardIterator __last, __false_type) {
        for (; __first != __last; ++__first)
            _Destroy(&*__first);
    }

    template<class _ForwardIterator>
    inline void __destroy_aux(_ForwardIterator, _ForwardIterator, __true_type) {}

    template<class _ForwardIterator, class _Tp>
    inline void __destroy(_ForwardIterator __first, _ForwardIterator __last, _Tp *) {
        typedef typename __type_traits<_Tp>::has_trivial_destructor _Trivial_destructor;
        __destroy_aux(__first, __last, _Trivial_destructor());
    }

    template<class _ForwardIterator>
    inline void _Destroy(_ForwardIterator __first, _ForwardIterator __last) {
        __destroy(__first, __last, __VALUE_TYPE(__first));
    }

    inline void _Destroy(char *, char *) {}

    inline void _Destroy(int *, int *) {}

    inline void _Destroy(float *, float *) {}

    inline void _Destroy(long *, long *) {}

    inline void _Destroy(double *, double *) {}

    template<class _T1, class _T2>
    inline void construct(_T1 *__p, const _T2 &__value) {
        _Construct(__p, __value);
    }

    template<class _T1>
    inline void construct(_T1 *_p) {
        _Construct(_p);
    }

    template<class _Tp>
    inline void destroy(_Tp *__pointer) {
        _Destroy(__pointer);
    }

    template<class _ForwardIterator>
    inline void destroy(_ForwardIterator __first, _ForwardIterator __last) {
        _Destroy(__first, __last);
    }

__STL_END_NAMESPACE
#endif //SAKURA_STL_STL_CONSTRUCT_H