c++ - Invalid conversion from int to wchar_t -

this file code.

file1.cpp

void cime::addexceptkey(wchar_t key) {     m_exceptkey.push_back(key); } 

file2.cpp

pyobject *imeaddexceptkey(pyobject *poself, pyobject *poargs) {     int key;     if(!pytuple_getinteger(poargs, 0, &key))     {         return py_buildexception();     }      cpythonime::instance().addexceptkey(key);     return py_buildnone(); } 

and warning:

warning c4242: 'argument': conversion 'int' 'wchar_t', possible loss of data 

and warning on line :

cpythonime::instance().addexceptkey(key); 

what wrong ? tried wchar_t key no chance.

the size of int may 2 or 4 bytes depending on implementation , size of wchar_t varies between 2,3 or 4 bytes of data. warning there may loss of data. have debug , see if there loss.