%%
%% This is file `physics2.sty'.
%% 
%% ******************************************************
%% * This work may be distributed and/or modified under *
%% * the conditions of the LaTeX Project Public License *
%% *                                                    *
%% *     http://www.latex-project.org/lppl.txt          *
%% *                                                    *
%% * either version 1.3c of this license or any later   *
%% * version.                                           *
%% ******************************************************
%% 
%% This work has the LPPL maintenance status `maintained'.
%% 
%% The Current Maintainer of this work is Zhang Tingxuan.
%% 
\NeedsTeXFormat{LaTeX2e}[2020/10/01]
\ProvidesPackage{physics2}
  [2023/04/02 v0.2.1 Tools for typesetting math for physics.]
% Some common variables.
\newcount\phy@tempcnta
\newdimen\phy@tempdima
\newdimen\phy@tempdimb
\newskip\phy@tempskipa
\newmuskip\phy@tempmuskipa
\newbox\phy@tempboxa
\newif\ifphy@tempswa
\newtoks\phy@toksa
% The package uses `keyval' to support key-value settings.
\RequirePackage{keyval}
\def\phy@true{true}
\def\phy@false{false}
% \phy@define@key{<module>}{<key>}[<default value>]{<code>}
\long\def\phy@define@key#1{\define@key{phy-#1}}
% \phy@setkeys{<module>}{<key-val list>}
\long\def\phy@setkeys#1{\setkeys{phy-#1}}
% \phy@processkeyopt{<module>}
\def\phy@processkeyopt#1{\let\reserved@a\@empty%
  \edef\reserved@a{\@ptionlist{\@currname.\@currext}}%
  \edef\reserved@a{\noexpand\phy@setkeys{#1}{\reserved@a}}%
  \reserved@a% the next line thanks to `geometry'
  \AtEndOfPackage{\let\@unprocessedoptions\relax}}
% Load the physics modules as 2e kernel does.
\def\usephysicsmodule{\phy@FWoptions\@pkgextension}
\let\phy@requiremodule\usephysicsmodule
\@onlypreamble\usephysicsmodule
\def\phy@FWoptions#1{\@ifnextchar[%]
  {\phy@FW@ptions#1}{\phy@FW@ptions#1[]}}
\@onlypreamble\phy@FWoptions
\def\phy@FW@ptions#1[#2]#3{\@ifnextchar[%]
  {\phy@FW@pti@ns#1[{#2}]#3}{\phy@FW@pti@ns#1[{#2}]#3[]}}
\@onlypreamble\phy@FW@ptions
\def\phy@FW@pti@ns#1[#2]#3[#4]{%
  \def\reserved@b##1,{%
    \ifx\@nnil##1\relax\else
      \ifx\@nnil##1\@nnil\else
       \noexpand\@onefilewithoptions{phy-##1}[{\unexpanded{#2}}][{#4}]%
       \noexpand\@pkgextension
      \fi
      \expandafter\reserved@b
    \fi}%
    \edef\reserved@a{\zap@space#3 \@empty}%
    \edef\reserved@a{\expandafter\reserved@b\reserved@a,\@nnil,}%
  \reserved@a}
\@onlypreamble\phy@FW@pti@ns
% The `common' module of physics2, every module needs this.
\phy@requiremodule{common}
\endinput
%% End of file `physics2.sty'.
