% \iffalse meta-comment
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% memoize-ext.dtx
% Additions and changes Copyright (C) 2024-2026 Clea F. Rees.
% Code from skeleton.dtx Copyright (C) 2015-2024 Scott Pakin (see below).
%
% This work may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
%   https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2008-05-04 or later.
%
% This work has the LPPL maintenance status 'muaintained'.
%
% The Current Maintainer of this work is Clea F. Rees.
%
% This work consists of all files listed in manifest.txt.
%
% The file memoize-ext.dtx is a derived work under the terms of the
% LPPL. It is based on version 2.4 of skeleton.dtx which is part of
% dtxtut by Scott Pakin. A copy of dtxtut, including the
% unmodified version of skeleton.dtx is available from
% https://www.ctan.org/pkg/dtxtut and released under the LPPL.
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% \fi
%
% \iffalse
%<*driver>
\GetIdInfo $Id: memoize-ext-sockets.dtx 11663 2026-02-21 01:18:19Z cfrees $ {Extensions for Memoize}
\ProvidesExplFile{\ExplFileName}{\ExplFileDate}{v0.1 \ExplFileVersion}{\ExplFileDescription}
\begin{document}
\let\MakePrivateLetters\MyMakePrivateLetters
\DocInput{\filename}
\end{document}
%</driver>
% \fi
%
% \title{\ExplFileName}
% \date{\ExplFileVersion~\ExplFileDate}
% \maketitle
%
% \begin{abstract}
%   \noindent\pkg{memoize-ext-sockets} is part of \pkg{memoize-ext}.
% \end{abstract}
%
%
% \tableofcontents
% 
% 
% \MaybeStop{%
% \PrintChanges
% \PrintIndex
% }
% 
% ^^A \section{Implementation}
%
%<*sty>
%<@@=mmzx>
% ^^A %    \begin{macrocode}
% ^^A \SetDefaultHookLabel{memoize-ext}
% ^^A %    \end{macrocode}
% ^^A    \begin{macrocode}
% ^^A \GetIdInfo $Id: memoize-ext-sockets.dtx 11663 2026-02-21 01:18:19Z cfrees $ {Extensions for Memoize}
% ^^A \ProvidesExplPackage{\ExplFileName}{\ExplFileDate}{v0.1 \ExplFileVersion}{\ExplFileDescription}
% ^^A    \end{macrocode}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% ltsockets
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% ^^A % \begin{fn}{\@@_socket_replicate:n,\@@_socket_replicate:nw}
% ^^A %   Write socket to memo, derive ‘base’ name of the current plug, assign it, use it and re-assign original plug\footnote{I suspect this is exactly the sort of thing sockets are not supposed to be for --- certainly hooks would be simpler \dots.}
% ^^A %    \begin{macrocode}
% ^^A \cs_new:Npn \@@_socket_replicate:nw #1#2 \q_@@_stop
% ^^A {
% ^^A   \@@_socket_to_ccmemo:nw {#1}#2 \q_@@_stop
% ^^A   \str_set:Ne \l_@@_tmpb_str {\@@_socket_assigned_plug:n {#1}}
% ^^A   \str_set:Ne \l_@@_tmpa_str {\exp_after:wN \@@_socket_plug_base:w \l_@@_tmpb_str \q_stop}
% ^^A   \socket_assign_plug:NV {#1} \l_@@_tmpa_str
% ^^A   \socket_use:nw {#1}#2 
% ^^A   \socket_assign_plug:NV {#1} \l_@@_tmpb_str
% ^^A }
% ^^A \cs_new:Npn \@@_socket_replicate:n #1
% ^^A {
% ^^A   \@@_socket_replicate:nw {#1} \q_@@_stop
% ^^A % ^^A   \@@_socket_to_ccmemo:n {#1}
% ^^A % ^^A   \str_set:Ne \l_@@_tmpb_str {\@@_socket_assigned_plug:n {#1}}
% ^^A % ^^A   \str_set:Ne \l_@@_tmpa_str {\exp_after:wN \@@_socket_plug_base:w \l_@@_tmpb_str \q_stop}
% ^^A % ^^A   \socket_assign_plug:nV {#1} \l_@@_tmpa_str
% ^^A % ^^A   \socket_use:n {#1}
% ^^A % ^^A   \socket_assign_plug:nV {#1} \l_@@_tmpb_str
% ^^A }
% ^^A %    \end{macrocode}
% ^^A % \end{fn}
% ^^A % \begin{fn}{\@@_socket_to_ccmemo:n,\@@_socket_to_ccmemo:nw}
% ^^A % Replicate socket.
% ^^A %    \begin{macrocode}
% ^^A % ^^A \cs_new:Npn \@@_socket_to_ccmemo:n #1
% ^^A % ^^A {
% ^^A % ^^A   \xtoksapp\mmzCCMemo{\UseSocket \c_left_brace_str #1 \c_right_brace_str}
% ^^A % ^^A }
% ^^A \cs_new:Npn \@@_socket_to_ccmemo:nw #1#2 \q_@@_stop
% ^^A {
% ^^A   \xtoksapp\mmzCCMemo
% ^^A   {
% ^^A     \UseSocket \c_left_brace_str #1 \c_right_brace_str
% ^^A     \tl_to_str:n {#2}
% ^^A   }
% ^^A }
% ^^A %    \end{macrocode}
% ^^A % \end{fn}
% ^^A % Simple variant.
% ^^A %    \begin{macrocode}
% ^^A \cs_generate_variant:Nn \socket_assign_plug:nn {nV}
% ^^A %    \end{macrocode}
% \begin{fn}{\@@_socket_assigned_plug:n}
%   Returns the name of the plug assigned to the specified socket.
%   This ought not use a variable internal to the format's code, but there does not seem to be a public interface.
%   So it may break, but for now it works.
%    \begin{macrocode}
\cs_new_nopar:Npn \@@_socket_assigned_plug:n #1
{ % rhybudd: fn mewnol
  \str_use:c { l__socket_#1_plug_str }
}
%    \end{macrocode}
% \end{fn}
% ^^A % \begin{fn}{\@@_socket_plug_base:w}
% ^^A %   Removes this module's prefix from a specified plug name.
% ^^A %   This is not generally safe, as it does no checking, but is only intended for internal use.
% ^^A %    \begin{macrocode}
% ^^A \cs_new_nopar:Npn \@@_socket_plug_base:w  #1/#2 \q_stop 
% ^^A {
% ^^A   \if_str_eq:eeF {#1}{mmzx}{#1/}
% ^^A   #2
% ^^A }
% ^^A %    \end{macrocode}
% ^^A % \end{fn}
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%</sty>
% 
%\Finale
% %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% 
%^^A vim: et:tw=0:sw=2:ts=2:foldmethod=marker:fmr=<<<,>>>: