Method calcLength

unittests/catch.hpp:5316–5342

            }

            void calcLength() {
                assert( m_stringIndex < m_column.m_strings.size() );

                m_suffix = false;
                auto width = m_column.m_width-indent();
                m_end = m_pos;
                while( m_end < line().size() && line()[m_end] != '\n' )
                    ++m_end;

                if( m_end < m_pos + width ) {
                    m_len = m_end - m_pos;
                }
                else {
                    size_t len = width;
                    while (len > 0 && !isBoundary(m_pos + len))
                        --len;
                    while (len > 0 && isWhitespace( line()[m_pos + len - 1] ))
                        --len;

                    if (len > 0) {
                        m_len = len;
                    } else {
                        m_suffix = true;
                        m_len = width - 1;
                    }
                }
            }

            auto indent() const -> size_t {
                auto initial = m_pos == 0 && m_stringIndex == 0 ? m_column.m_initialIndent : std::string::npos;