template< typename... SupportableProperties> bool operator==( const any_executor< SupportableProperties... > & a, const any_executor< SupportableProperties... > & b); » more... template< typename... SupportableProperties> bool operator==( const any_executor< SupportableProperties... > & a, nullptr_t ); » more... template< typename... SupportableProperties> bool operator==( nullptr_t , const any_executor< SupportableProperties... > & b); » more...