Marcin questions

• "multiple definition of..." error for a full specialisation of a template function
• boost spirit grammar error - "no type named ‘size’ in ‘struct boost::spirit::unused_type’"
• How to swap two elements of an mpl::vector?
• Is there a way to print a constexpr string during compiletime?
• "too many template-parameter-lists" error when specializing a member function

Marcin answers