Comment #12 on issue 336 by [email protected]: Support generic string
type
http://code.google.com/p/protobuf/issues/detail?id=336
the warning I'm referring to is regarding the truncation of wchar_t to
char, this will cause a loss of data in case your wchar_t contains a value
higher than 256, and will probably do the wrong thing for values in the
range [128..256).
Now, having that said, I couldn't reproduce this warning with
std::basic_string, but I do have a sample of the warning I was talking
about:
#include <string>
int main(int argc, char* argv[])
{
wchar_t w = 300;
std::wstring ww( 10, w );
//surprisingly enough, no warning here
std::string aa( ww.c_str(), ww.c_str() + ww.size() );
aa.assign( ww.c_str(), ww.c_str() + ww.size() );
//this does generate a warning
aa[ 2 ] = w;
//1>c:\users\eyal\documents\visual studio
2005\projects\sample_cpp\sample_cpp\sample_cpp.cpp(18) : warning
C4244: '=' : conversion from 'wchar_t' to 'char', possible loss of data
return 0;
}
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