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Showing content from https://en.cppreference.com/w/cpp/language/../error/error_code/../../string/wide/wmemmove.html below:

std::wmemmove - cppreference.com

wchar_t* wmemmove( wchar_t* dest, const wchar_t* src, std::size_t count );

Copies exactly count successive wide characters from the wide character array pointed to by src to the wide character array pointed to by dest.

If count is zero, the function does nothing.

The arrays may overlap: copying takes place as if the wide characters were copied to a temporary wide character array and then copied from the temporary array to dest.

[edit] Parameters dest - pointer to the wide character array to copy to src - pointer to the wide character array to copy from count - number of wide characters to copy [edit] Return value

Returns a copy of dest.

[edit] Notes

This function is not locale-sensitive and pays no attention to the values of the wchar_t objects it copies: nulls as well as invalid characters are copied too.

[edit] Example

#include <clocale>
#include <cwchar>
#include <iostream>
#include <locale>
 
int main()
{
    std::setlocale(LC_ALL, "en_US.utf8");
    std::wcout.imbue(std::locale("en_US.utf8"));
 
    wchar_t str[] = L"Î±Î²Î³Î´ÎµÎ¶Î·Î¸Î¹ÎºÎ»Î¼Î½Î¾Î¿ÏÏÏÏÏÏÏÏÏ";
    std::wcout << str << '\n';
    std::wmemmove(str + 4, str + 3, 3); // copy from [Î´ÎµÎ¶] to [ÎµÎ¶Î·]
    std::wcout << str << '\n';
}

Possible output:

Î±Î²Î³Î´ÎµÎ¶Î·Î¸Î¹ÎºÎ»Î¼Î½Î¾Î¿ÏÏÏÏÏÏÏÏÏ
Î±Î²Î³Î´Î´ÎµÎ¶Î¸Î¹ÎºÎ»Î¼Î½Î¾Î¿ÏÏÏÏÏÏÏÏÏ

[edit] See also

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