Method addPattern

tutorials/external/catch.hpp:4625–4642

        template<typename T>
        void addPattern() {
            std::string token = subString();
            for( std::size_t i = 0; i < m_escapeChars.size(); ++i )
                token = token.substr( 0, m_escapeChars[i]-m_start-i ) + token.substr( m_escapeChars[i]-m_start-i+1 );
            m_escapeChars.clear();
            if( startsWith( token, "exclude:" ) ) {
                m_exclusion = true;
                token = token.substr( 8 );
            }
            if( !token.empty() ) {
                TestSpec::PatternPtr pattern = std::make_shared<T>( token );
                if( m_exclusion )
                    pattern = std::make_shared<TestSpec::ExcludedPattern>( pattern );
                m_currentFilter.m_patterns.emplace_back( pattern );
            }
            m_exclusion = false;
            m_mode = None;
        }

        void addFilter();
    };