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Diffstat (limited to 'macros/latex-dev/required/amsmath/amsxtra.dtx')
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diff --git a/macros/latex-dev/required/amsmath/amsxtra.dtx b/macros/latex-dev/required/amsmath/amsxtra.dtx new file mode 100644 index 0000000000..2165dde41a --- /dev/null +++ b/macros/latex-dev/required/amsmath/amsxtra.dtx @@ -0,0 +1,127 @@ +% +% \iffalse meta-comment +% +% Copyright (C) 1995, 1999 American Mathematical Society. +% Copyright (C) 2016-2019 LaTeX3 Project and American Mathematical Society. +% +% 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 2005/12/01 or later. +% +% This work has the LPPL maintenance status `maintained'. +% +% The Current Maintainer of this work is the LaTeX3 Project. +% +% \fi +% +%\iffalse +%<*driver> +\documentclass{amsdtx} +\def\MaintainedByLaTeXTeam#1{% +\begin{center}% +\fbox{\fbox{\begin{tabular}{@{}l@{}}% +This file is maintained by the \LaTeX{} Project team.\\% +Bug reports can be opened (category \texttt{#1}) at\\% +\url{https://latex-project.org/bugs/}.\end{tabular}}}\end{center}} +\usepackage{amsxtra} +\GetFileInfo{amsxtra.sty} +\begin{document} +\title{The \pkg{amsxtra} package} +\author{American Mathematical Society\\Michael Downes} +\date{Version \fileversion, \filedate} +\DocInput{amsxtra.dtx} +\end{document} +%</driver> +%\fi +% +% \maketitle +% \MaintainedByLaTeXTeam{amslatex} +% +% \MakeShortVerb\| +% +% \section{Introduction} +% The \pkg{amsxtra} package contains a few rarely used commands that +% were present in version 1.1 of the \pkg{amstex} package: +% \cn{fracwithdelims}, {accentedsymbol}, \cn{sphat}, \cn{spcheck}, +% \cn{sptilde}, \cn{spdot}, \cn{spddot}, \cn{spdddot}, \cn{spbreve}. +% If any of these commands were used in existing documents, the +% \pkg{amsxtra} package provides a way to get them. But for 99\% of +% documents using the \pkg{amstex} package these commands are just +% wasted overhead. +% +% \StopEventually{} +% +% \begin{macrocode} +\ProvidesPackage{amsxtra}[1999/11/15 v1.2c AMS extra commands] +% \end{macrocode} +% We need to ensure that either the \pkg{amstex} package or the +% \pkg{amsmath} package is loaded. This means we need something a +% little more complicated than \cn{RequirePackage}. +% \begin{macrocode} +\@ifpackageloaded{amstex}{}{% + \RequirePackage{amsmath}[1996/10/01 v1.2]} +% \end{macrocode} +% +% Superscripted accent characters. +% \begin{macrocode} +\def\sphat{^{\mathchoice{}{}% + {\,\,\smash[b]{\hbox{\lower4\ex@\hbox{$\m@th\widehat{\null}$}}}}% + {\,\smash[b]{\hbox{\lower3\ex@\hbox{$\m@th\hat{\null}$}}}}}} +\def\spcheck{^\vee} +\def\sptilde{^\sim} +\def\spdot{^{\hbox{\raise\ex@\hbox{\normalfont .}}}} +\def\spddot{^{\hbox{\raise\ex@\hbox{\normalfont ..}}}} +\def\spdddot{^{\hbox{\raise\ex@\hbox{\normalfont...}}}} +\def\spbreve{^{\!\smash[b]{\hbox{\lower4\ex@\hbox{\u{}}}}}} +% \end{macrocode} +% +% The \cn{fracwithdelims} command is skipped if the base package is +% \pkg{amsmath}; it is only needed if the base package is +% \pkg{amstex}. +% \begin{macrocode} +\@ifpackageloaded{amstex}{% +\def\fracwithdelims#1#2{\new@ifnextchar[{\fracwithdelims@#1#2}% + {\fracwithdelims@#1#2[\@empty]}} +\def\fracwithdelims@#1#2[#3]#4#5{\relax + \ifx\@empty#3{#4\overwithdelims#1#2#5}\else + {#4\abovewithdelims#1#2#3\relax#5}\fi} +}{} +% \end{macrocode} +% +% Perhaps |\accentedsymbol| should use |\newsavebox|, but I don't +% know of any compelling reason at the moment.[mjd,5-Sep-1994] +% |\accentedsymbol| can only produce a single size of +% the given symbol, so you'd need two different versions for main +% size and subscript size. +% \begin{macrocode} +\def\accentedsymbol#1#2{% + \expandafter\newbox + \csname\expandafter\@gobble\string#1@box\endcsname + \expandafter\setbox + \csname\expandafter\@gobble\string#1@box\endcsname + \hbox{$\m@th#2$}% + \newcommand{#1}{% + \expandafter\copy + \csname\expandafter\@gobble\string#1@box\endcsname{}}% +} +% \end{macrocode} +% +% Change the definition of \qc{\~} to automatically remove a +% preceding space as well as a following space, if present. +% \begin{macrocode} +\def~{\nobreakspace} +\DeclareRobustCommand{\nobreakspace}{\unskip\nobreak\ \ignorespaces} +% \end{macrocode} +% +% The usual \cs{endinput} to ensure that random garbage at the end of +% the file doesn't get copied by \fn{docstrip}. +% \begin{macrocode} +\endinput +% \end{macrocode} +% +% \CheckSum{113} +% \Finale |