Function template icase
boost::xpressive::icase — Makes a sub-expression case-insensitive.
Synopsis
template<typename Expr> unspecified icase(Expr const & expr);
Description
Use icase() to make a sub-expression case-insensitive. For instance, "foo" >> icase(set['b'] >> "ar") will match "foo" exactly followed by "bar" irrespective of case.