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+%%
+%% Package: spectralsequences.sty version 1.0
+%% Author: Hood Chatham
+%% Email: hood@mit.edu
+%% Date: 2017-06-18
+%% License: Latex Project Public License
+%%
+%% File: sseqcheckdefinitions.code.tex
+%%
+%% A few tikz commands are modified in sseqpages. This file checks the definitions of all commands modified. Of course, this is insufficient to ensure that
+%% the behavior isn't completely wrong, but at least it's a sanity check.
+%%
+
+% TODO: we could recover from failing to patch keys.
+
+\sseq@tempiftrue
+\begingroup
+
+\def\sseq@checkdef#1{\def\sseq@temp{\sseq@checkdef@{#1}}\afterassignment\sseq@temp\@xp\def\csname sseq@check@\sseq@macroname#1\endcsname}
+\def\sseq@checkdef@#1{\@xp\ifx\csname sseq@check@\sseq@macroname#1\endcsname#1\else
+ \sseq@tempiffalse
+\fi}
+
+%%
+%% sseqkeys.code.tex
+%%
+
+
+\sseq@checkdef\pgfkeys@case@one{%
+ \pgfkeysifdefined{\pgfkeyscurrentkey/.@cmd}%
+ {\pgfkeysgetvalue{\pgfkeyscurrentkey/.@cmd}{\pgfkeys@code}%
+ \expandafter\pgfkeys@code\pgfkeyscurrentvalue\pgfeov}
+ {\pgfkeys@case@two}%
+}
+
+\sseq@checkdef\pgfkeys@case@two@extern{%
+ \ifx\pgfkeyscurrentvalue\pgfkeysnovalue@text%
+ \pgfkeysvalueof{\pgfkeyscurrentkey}%
+ \else%
+ \pgfkeyslet{\pgfkeyscurrentkey}\pgfkeyscurrentvalue%
+ \fi%
+}
+
+
+\ifsseq@tempif\else
+ \endgroup
+ \sseq@tempiffalse % We'll throw a critical error in spectralsequences.sty to end input
+ \endinput
+\fi
+%%
+%% sseqdrawing.code.tex
+%%
+
+%from \pgf\frontendlayer\tikz\libraries\tikzlibraryfit.code.tex line 81
+\sseq@checkdef\tikz@lib@fit@scan@handle#1{%
+ \iftikz@shapeborder%
+ % Ok, fit all four external anchors, if they exist
+ \tikz@lib@fit@adjust{\pgfpointanchor{\tikz@shapeborder@name}{west}}%
+ \tikz@lib@fit@adjust{\pgfpointanchor{\tikz@shapeborder@name}{east}}%
+ \tikz@lib@fit@adjust{\pgfpointanchor{\tikz@shapeborder@name}{north}}%
+ \tikz@lib@fit@adjust{\pgfpointanchor{\tikz@shapeborder@name}{south}}%
+ \else%
+ \tikz@lib@fit@adjust{#1}%
+ \fi%
+ \tikz@lib@fit@scan%
+}
+
+% from \pgf\frontendlayer\tikz\tikz.code.tex line 5164
+\sseq@checkdef\tikz@calc@anchor#1.#2\tikz@stop{%
+ \pgfpointanchor{\tikz@pp@name{#1}}{#2}%
+}
+
+\ifsseq@tempif
+ \global\sseq@patchfittrue
+\else
+ \sseq@warning{fit-patch-failed}
+ \global\sseq@patchfitfalse
+\fi
+
+\sseq@tempiftrue
+
+
+%%
+%% sseqforeach.code.tex
+%%
+\sseq@checkdef\pgffor@@vars@opt[#1]{\pgfkeys{/pgf/foreach/.cd,#1}\pgffor@vars}
+
+\sseq@checkdef\pgffor@doloop{%
+ \pgffor@begingroup
+ \edef\pgffor@temp{\expandafter\Pgffor@geT\the\pgffor@iter}%
+ \edef\pgffor@incheck{{.0/}{\pgffor@temp/}}%
+ \expandafter\pgfutil@in@\pgffor@incheck%
+ \ifpgfutil@in@%
+ \expandafter\pgffor@strip\pgffor@temp%
+ \fi%
+ \expandafter\pgfutil@in@\expandafter/\expandafter{\pgffor@var}%
+ \ifpgfutil@in@%
+ \expandafter\def\expandafter\pgffor@valuerest\expandafter{\pgffor@temp//\relax}%
+ \expandafter\pgffor@multiassign\pgffor@var/\pgffor@stop/\pgffor@stop/\relax%
+ \else%
+ % Convert to alphabetic sequence, if necessary.
+ \ifpgffor@alphabeticsequence%
+ \pgffor@makealphabetic\pgffor@temp%
+ \expandafter\let\pgffor@var=\pgffor@temp%
+ \else%
+ \expandafter\expandafter\expandafter\def\expandafter\pgffor@var\expandafter{\pgffor@temp}%
+ \fi%
+ \fi%
+ % Insert any context, if any.
+ \ifpgffor@context%
+ \let\pgffor@temp=\pgffor@dots@pre%
+ \expandafter\pgfutil@append@macrotomacro\expandafter%
+ {\expandafter\pgffor@temp\expandafter}\expandafter{\pgffor@var}%
+ \expandafter\pgfutil@append@macrotomacro\expandafter%
+ {\expandafter\pgffor@temp\expandafter}\expandafter{\pgffor@dots@post}%
+ \expandafter\let\pgffor@var=\pgffor@temp%
+ \fi%
+ % Perform assignments before loop body.
+ \ifx\pgffor@assign@before@code\pgfutil@empty%
+ \else%
+ \pgffor@assign@before@code%
+ \fi%
+ %
+ \expandafter\expandafter\expandafter\pgffor@reset@hooks\expandafter\pgffor@beginhook\expandafter\pgffor@body\pgffor@endhook%
+ %
+ % Perform assignments after loop body.
+ \ifx\pgffor@assign@after@code\pgfutil@empty%
+ \else%
+ \pgffor@assign@after@code%
+ \fi%
+ \pgffor@endgroup%
+ \pgffor@loop%
+}
+
+\sseq@checkdef\pgffor@invokebody{%
+ \pgffor@begingroup%
+ \expandafter\pgfutil@in@\expandafter/\expandafter{\pgffor@var}%
+ \ifpgfutil@in@%
+ \expandafter\def\expandafter\pgffor@valuerest\expandafter{\pgffor@value//\relax}%
+ \expandafter\pgffor@multiassign\pgffor@var/\pgffor@stop/\pgffor@stop/\relax%
+ \else%
+ \expandafter\expandafter\expandafter\def\expandafter\pgffor@var\expandafter{\pgffor@value}%
+ \fi%
+ % Execute assign once code.
+ \ifx\pgffor@assign@once@code\pgfutil@empty%
+ \else\pgffor@assign@once@code%
+ \fi%
+ % Execute assign before code.
+ \ifx\pgffor@assign@before@code\pgfutil@empty%
+ \else\pgffor@assign@before@code%
+ \fi%
+ %
+ \expandafter\expandafter\expandafter\pgffor@reset@hooks\expandafter\pgffor@beginhook\expandafter\pgffor@body\pgffor@endhook%
+ % Execute assign after code.
+ \ifx\pgffor@assign@after@code\pgfutil@empty%
+ \else%
+ \pgffor@assign@after@code%
+ \fi%
+ %
+ \pgffor@endgroup%
+}
+
+\ifsseq@tempif
+ \global\sseq@patchforeachtrue
+\else
+ \sseq@warning{foreach-patch-failed}
+ \global\sseq@patchforeachfalse
+\fi
+
+\endgroup \ No newline at end of file