...one of the most highly
regarded and expertly designed C++ library projects in the
world.
— Herb Sutter and Andrei
Alexandrescu, C++
Coding Standards
boost::operator<< — Provides streaming output for variant
types.
template<typename ElemType, typename Traits, typename T1, typename T2, ..., typename TN> std::basic_ostream<ElemType,Traits> & operator<<(std::basic_ostream<ElemType,Traits> & out, const variant<T1, T2, ..., TN> & rhs);
Requires: |
Every bounded type of the variant must
fulfill the requirements of the
OutputStreamable
concept. |
Effects: |
Calls out << x , where x is
the content of rhs . |