Is the runtime behaviour correct? Have you been able to reproduce
--- In Boost-Users@yahoogroups.com, Kevlin Henney
wrote:
the
warning with a smaller example based just on lexical_cast?
I have not tried to run program yet because of much bigger problems
with random library -- it simply fails to compile (see my original
post).
Reproducing warning with lexical cast is straightforward:
#include
#include <iostream>
int main()
{
std::cout << boost::lexical_cast<int>("7") << std::endl;
return 0;
}
reports the same warning
I:\SW\EXTERNAL\BOOST_1_30_0\boost/lexical_cast.hpp(147) : warning
C4800: 'void *' : forcing value to bool 'true' or 'false'
(performance warning)
I:\SW\EXTERNAL\BOOST_1_30_0\boost/lexical_cast.hpp(146) :
while compiling class-template member function 'bool __thiscall
boost::detail::lexical_stream::operator <<(char *const
& )'
Runtime behaviour of this program is correct. The warning is rather
innocent, but annoying.
Moreover the warning is abolutely correct -- returning stream from
method with bool return type will convert void* to bool. Also it
should be rather easy to fix, by explicitely casting it to bool.
