40     : m_begin( "" ), m_end( m_begin )                      {}  in const_string()
46       m_end( m_begin + s.length() )                        {}  in const_string()
50     , m_end( s ? m_begin + std::strlen( s ) : m_begin )  in const_string()
54     : m_begin( s ), m_end( m_begin + length )              { if( length == 0 ) erase(); }  in const_string()
57     : m_begin( first ), m_end( last )                      {}  in const_string()
66     size_t          length() const                          { return m_end - m_begin; }  in length()
67     bool            is_empty() const                        { return m_end == m_begin; }  in is_empty()
69     void            erase()                                 { m_begin = m_end = ""; }  in erase()
70 …void            resize( size_t new_len )                { if( m_begin + new_len < m_end ) m_end = …  in resize()
71 …void            rshorten( size_t shift = 1 )            { m_end  -= shift; if( m_end <= m_begin ) …  in rshorten()
72 …void            lshorten( size_t shift = 1 )            { m_begin += shift; if( m_end <= m_begin )…  in lshorten()
89         char const* tmp2 = m_end;  in swap()
92         m_end       = s.m_end;  in swap()
95         s.m_end     = tmp2;  in swap()
118     iterator        end() const                             { return m_end;   }  in end()
119     reverse_iterator rbegin() const                         { return reverse_iterator( m_end );   }  in rbegin()
126     char const*     m_end;  member in common_layer::const_string
155         m_end  = s.m_end;  in operator =()