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%%
%% This is file `luamathalign.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% luamathalign.dtx (with options: `package')
%%
%% Copyright (C) 2019--2022 by Marcel Krueger
%%
%% This file 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:
%%
%% http://www.latex-project.org/lppl.txt
%%
%% and version 1.3 or later is part of all distributions of
%% LaTeX version 2005/12/01 or later.
\NeedsTeXFormat{LaTeX2e}
\ProvidesPackage
{luamathalign}
[2022-05-04 v0.3 additional math alignment tricks using Lua]
\RequirePackage{iftex}
\RequireLuaTeX
\directlua{require'luamathalign'}
\IfPackageLoadedTF{amsmath}{%
\@firstofone
}{%
\AddToHook{package/amsmath/after}
}
{%
\def\align@preamble{%
&\hfil
\strut@
\setboxz@h{\@lign$\m@th\displaystyle{%
\LuaMathAlign@begin##\LuaMathAlign@end}$}%
\ifmeasuring@\savefieldlength@\fi
\set@field
\tabskip\z@skip
&\setboxz@h{\@lign$\m@th\displaystyle{{}##}$}%
\ifmeasuring@\savefieldlength@\fi
\set@field
\hfil
\tabskip\alignsep@
}
\renewcommand{\start@aligned}[2]{%
\RIfM@\else
\nonmatherr@{\begin{\@currenvir}}%
\fi
\savecolumn@ % Assumption: called inside a group
\alignedspace@left
\if #1t\vtop \else \if#1b \vbox \else \vcenter \fi \fi \bgroup
\maxfields@#2\relax
\ifnum\maxfields@>\m@ne
\multiply\maxfields@\tw@
\let\math@cr@@@\math@cr@@@alignedat
\alignsep@\z@skip
\else
\let\math@cr@@@\math@cr@@@aligned
\alignsep@\minalignsep
\fi
\Let@ \chardef\dspbrk@context\@ne
\default@tag
\spread@equation % no-op if already called
\global\column@\z@
\ialign\bgroup
&\column@plus
\hfil
\strut@
$\m@th\displaystyle{\LuaMathAlign@begin##\LuaMathAlign@end}$%
\tabskip\z@skip
&\column@plus
$\m@th\displaystyle{{}##}$%
\hfil
\tabskip\alignsep@
\crcr
}
\edef\math@cr@@@alignedat{\LuaMathAlign@end@early
\unexpanded\expandafter{\math@cr@@@alignedat}}
\edef\math@cr{\LuaMathAlign@end@early
\unexpanded\expandafter{\math@cr}}
\edef\endaligned{\LuaMathAlign@end@early
\unexpanded\expandafter{\endaligned}}
}
\protected\def\AlignHere{\SetAlignmentPoint\m@ne}
\begingroup
\def\patch@finph@nt\setbox\tw@\null{%
\LuaMathAlign@IsolateAlignmentPoints\z@ into \tw@
}%
\expanded{\endgroup%
\protected\def\noexpand\finph@nt{%
\unexpanded\expandafter\expandafter\expandafter{%
\expandafter\patch@finph@nt\finph@nt
}%
}}
\ExplSyntaxOff
\endinput
%%
%% End of file `luamathalign.sty'.
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