">typedef</SPAN> Ch                      char_type;
    <SPAN CLASS="keyword">typedef</SPAN> Tr                      traits_type;
    <SPAN CLASS="keyword">typedef</SPAN> Mode                    mode;
    <SPAN CLASS="keyword">typedef</SPAN> Alloc                   allocator_type;
    <SPAN CLASS="keyword">typedef</SPAN> <SPAN CLASS="omitted">implementation-defined</SPAN>  size_type;

    <A CLASS="documented" HREF="#default_constructor">chain</A>();
    <A CLASS="documented" HREF="#copy_constructor">chain<