Disallow a specific function template instantiation

Question

I would like to define a template function but disallow instantiation with a particular type. Note that in general all types are allowed and the generic template works, I just w

Answer 1

I would use a static assert within your function call to create the proper failure during function instantiation:

template
class is_double{ static const int value = false; }

template<>
class is_double{ static const int value = true; }

template
T convert( const char *argument ){
    BOOST_STATIC_ASSERT( !is_double::value );
    //rest of code
}

And that should work within a function.