From cppreference.com
wchar_t*wmemmove(wchar_t*dest,constwchar_t*src,std::size_tcount);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.
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 Return value
Returns a copy of dest.
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.
Example
Run this code
#include<clocale>#include<cwchar>#include<iostream>#include<locale>intmain(){std::setlocale(LC_ALL,"en_US.utf8");std::wcout.imbue(std::locale("en_US.utf8"));wchar_tstr[]=L"αβγδεζηθικλμνξοπρστυφχψω";std::wcout<<str<<'\n';std::wmemmove(str+4,str+3,3);// copy from [δεζ] to [εζη]std::wcout<<str<<'\n';}Possible output:
αβγδεζηθικλμνξοπρστυφχψω αβγδδεζθικλμνξοπρστυφχψω See also
copies a certain amount of wide characters between two non-overlapping arrays
(function)
moves one buffer to another
(function)
(C++11)
copies a range of elements to a new location
(function template & algorithm function object)
(C++20)(C++20)
copies a range of elements in backwards order
(function template & algorithm function object)
(C++20)
for wmemmove