Hello,
Code below, first what I'm trying to do is...
assign a value to a adapted struct (BOOST_FUSION_ADAPT_ADT), which works fine if both are of the same type or convertible:
template
typename std::enable_if< std::is_convertible< typename fusion::result_of::at_c::type, V>::value ,void>::type assign(Seq& s, V& v)
{
fusion::get<I>(s) = v;
}
Some of my input is string, and the struct member is bool, unsigned int etc. In this case I'd need to know the type to convert from string.
boost::fusion::get returns the attribute_proxy for the adapted struct, so does at_c<>::type.
template
typename std::enable_if< !std::is_convertible< typename fusion::result_of::at_c::type, V>::value /*&& !std::is_same::value*/ ,void>::type assign(Seq& s, V& v)
{
std::stringstream ss;
ss << v;
ss >> fusion::get<I>(s);
}
Obviously this does not compile. Is there any trick to get to the type of the proxy?
One idea I have is decltype(fusion::get<I>(s).get()), but not sure if I can get this to work in an enable_if...
thanks,
Jens Weller
