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authorNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
committerNorbert Preining <norbert@preining.info>2019-09-02 13:46:59 +0900
commite0c6872cf40896c7be36b11dcc744620f10adf1d (patch)
tree60335e10d2f4354b0674ec22d7b53f0f8abee672 /macros/latex/contrib/loops/tex
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+%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%
+% This is file 'loops.sty', version 1.3, 2013/05/15. %
+% %
+% This package and accompanying files may be distributed and/or %
+% modified under the conditions of the LaTeX Project Public License, %
+% either version 1.3 of this license or 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. %
+% %
+% The LPPL maintenance status of this software is 'author-maintained'. %
+% %
+% This software is provided 'as it is', without warranty of any kind, %
+% either expressed or implied, including, but not limited to, the %
+% implied warranties of merchantability and fitness for a particular %
+% purpose. %
+% %
+% The following files constitute the loops bundle and must be %
+% distributed as a whole: %
+% %
+% README, loops.sty, loops-pokayoke1. %
+% %
+% Copyright (c) 2012-2013 Ahmed Musa (amusa22@gmail.com). %
+%++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++%
+
+\begingroup
+\catcode035 06 % #
+\catcode064 11 % @
+\catcode123 01 % {
+\catcode125 02 % }
+\catcode044 12 % ,
+\def\skv@prova{\endgroup
+ \def\do##1,{%
+ \ifx\do##1\else
+ \catcode##1\string=\the\catcode##1\relax
+ \expandafter\do
+ \fi
+ }%
+ \edef\loops@restorecodes{\do035,064,123,125,061,059,\do,}%
+}
+\skv@prova
+\catcode035 06 % #
+\catcode064 11 % @
+\catcode123 01 % {
+\catcode125 02 % }
+\catcode061 12 % =
+\catcode044 12 % ,
+\def\do#1=#2,{%
+ \ifx#1\do\else
+ \edef\loops@restorecodes{%
+ \loops@restorecodes
+ \catcode#1=\the\catcode#1\relax
+ }%
+ \catcode#1=#2\relax
+ \expandafter\do
+ \fi
+}
+\do 032=10,033=12,036=03,038=04,040=12,041=12,042=12,043=12,%
+ 059=12,045=12,047=12,058=12,063=12,091=12,093=12,126=13,\do=,%
+
+\ProvidesPackage{loops}[2013/05/15 v1.3 Loops and list processors (AM)]
+\NeedsTeXFormat{LaTeX2e}[2011/06/27]
+
+% This is the way to load 'skeyval-for-core' here, otherwise we
+% can't access some of the needed commands from 'skeyval-core':
+
+\@ifpackageloaded{skeyval}{}{\RequirePackage{skeyval}}
+
+\skvnewlet\ltxkernelfor\@for
+\skvnewlet\ltxkerneltfor\@tfor
+
+\directkeys*{
+ .every unknown option={
+ \@onelevel@sanitize\CurrentOption
+ \PackageWarning{loops}{Unknown option '\CurrentOption' ignored}
+ },
+ .path=SKV/loops,
+ .holder prefix=lps@,
+ .initialize keys after define,
+ .new options={
+ .bool/verbose/true/\iflps@verbose\skv@verbosetrue\fi,
+ },
+ .copy class options and process options
+}
+
+% \lpsdocsvlist{<parser>}{<list>}{<callback>}
+%
+% Execute <callback> on each item of <list>. The user has access to
+% \firstprevitem, \secondprevitem, \currentitem, \firstnextitem,
+% \secondnextitem (some of which may be empty), and \iflpslastitem.
+%
+% Examples:
+%
+% \def\aitems{}
+% \lpsdocsvlist{,}{a,b,c,d,e,f}{%
+% \def\do##1{\ifx##1\@empty\let##1\@gobble\fi}%
+% \do\secondprevitem\do\firstprevitem\do\firstnextitem
+% \edef\aitems{%
+% \skvexpandonce\aitems\ifx\aitems\@empty\else,\fi
+% \secondprevitem,\firstprevitem,\currentitem,%
+% \firstnextitem,\secondnextitem
+% }%
+% }
+%
+\skvnewregister\bool{\iflpslastitem}
+\skvnewlet\lpsbreakloop\skvbreaklooptrue
+\skvrobustdef*\lpsdocsvlist#1#2#3{%
+ \skvpushfunctions\lpsdocsvlist{%
+ \do\lpsuserlist\do\firstprevitem\do\secondprevitem\do\currentitem
+ \do\firstnextitem\do\secondnextitem\do\lps@do\do\skv@callback
+ }\skv@csvdepth
+ \let\firstprevitem\@empty
+ \let\secondprevitem\@empty
+ \edef\lpsuserlist{\unexpanded{#2}}%
+ \edef\skv@callback{\unexpanded{#3}}%
+ \skvcsvnormalize[#1]\lpsuserlist
+ \def\lps@do##1#1##2#1##3#1{%
+ \edef\currentitem{\unexpanded{##1}}%
+ \skvifxTF\currentitem\skv@nnil{%
+ \skvbreakloopfalse
+ }{%
+ \skvifdefboolTF{skvbreakloop}{%
+ \skvbreakloopfalse
+ \def\lps@do####1\skv@nil#1\skv@nil#1\skv@nil#1{%
+ \edef\lpsremainder{\unexpanded{####1}}%
+ }%
+ }{%
+ \edef\firstnextitem{\unexpanded{##2}}%
+ \ifx\firstnextitem\skv@nnil
+ \lpslastitemtrue
+ \let\firstnextitem\@empty
+ \fi
+ \edef\secondnextitem{\unexpanded{##3}}%
+ \ifx\secondnextitem\skv@nnil
+ \let\secondnextitem\@empty
+ \fi
+ \lps@callback\relax
+ \let\secondprevitem\firstprevitem
+ \let\firstprevitem\currentitem
+ }%
+ \lps@do##2#1##3#1%
+ }%
+ }%
+ \skvbreakloopfalse
+ \skvifemptyTF\lpsuserlist{}{%
+ \expandafter\lps@do\lpsuserlist#1\skv@nil#1\skv@nil#1\skv@nil#1%
+ }%
+ \skvpopfunctions\lpsdocsvlist\skv@csvdepth
+}
+
+% Remove one element from a list. Only the first occurence of the
+% element will be removed. This is fast.
+%
+% \lpsremovefromlist<parser>{<element to remove>}<listcmd>
+%
+% Example:
+%
+% \def\x{1,2,3,4}
+% \lpsremovefromlist{,}7\x
+%
+\skvrobustdef\lpsremovefromlist#1#2#3{%
+ \begingroup
+ \def\lps@remove@a##1\lps@nil{##1}%
+ \def\lps@remove@b##1\lps@nil{}%
+ \def\lps@remove@c##1#1#2##2\lps@nil##3\lps@nil##4\lps@nnil{%
+ \expandafter\endgroup##3\def#3{##1##2}\lps@nil
+ }%
+ \expandafter\lps@remove@c\expandafter#1#3\lps@nil
+ \lps@remove@a\lps@nil#1#2\lps@nil\lps@remove@b\lps@nil\lps@nnil
+}
+
+% Expandable version of D.E. Knuth's \loop:
+%
+\skvnewdef\dekloop#1\repeat{\skv@dekloop{#1}}
+\skvnewdef\skv@dekloop#1{%
+ #1%
+ \expandafter\skv@dekloop
+ \else
+ \expandafter\@gobble
+ \fi
+ {#1}%
+}
+
+\skvnewdef\lpswhilecondition#1\do#2{%
+ \csname @#1firstofone\else gobble\fi\endcsname
+ {#2\lpswhilecondition{#1}\do{#2}}%
+}
+
+% A version of D.E. Knuth's \loop that can be nested.
+% Credit: David P. Carlisle.
+%
+% \carlisleloop\a
+% \carlisleloop\b
+% ...
+% \if...
+% \repeat\b
+% ...
+% \if...
+% \repeat\a
+%
+\let\repeat\fi
+\skvrobustdef*\carlisleloop#1{%
+ \long\def\skv@carlisleloop##1##2\repeat#1{%
+ \long\def##1{##2\relax\expandafter##1\fi}%
+ ##1\let##1\relax
+ }%
+ \expandafter\skv@carlisleloop
+ \csname skv@carlisleloop@\string#1\endcsname
+}
+
+% A version of D.E.Knuth's \loop that can be nested naturally.
+%
+% 1. As a design constraint, this doesn't accept \par.
+%
+% 2. ak=Wilhelm Ackermann, ter=Rózsa Péter; in honour of these
+% mathematicians.
+%
+% \akterloop
+% \akterloop
+% ...
+% \if...
+% \repeat
+% ...
+% \if...
+% \repeat
+%
+\skvnewregister\toks{\skv@aktertoks}
+\skvnewdef*\skv@aktercnt{0}
+\skvrobustdef*\skv@akter@defloop{%
+ \def\skv@tempa##1##2##3{%
+ \def\skv@tempa{##1}%
+ \def\skv@tempb{##2}%
+ \let##2\fi
+ \gdef##1####1##2{%
+ \def##3{####1\relax\expandafter##3\fi}%
+ ##3\let##3\relax
+ }%
+ }%
+ \def\x##1{%
+ \skvnoexpandcs{skv@akter@##1@\skvrom\skv@aktercnt}%
+ }%
+ \edef\x{\x{loop}\x{repeat}\x{iterate}}%
+ \expandafter\skv@tempa\x
+}
+\skvrobustdef*\akterloop{%
+ \begingroup
+ \everyeof{EOF}\def\skv@aktercnt{0}%
+ \skv@aktertoks{\dekloop}%
+ \skv@akterpush
+}
+\skvrobustdef*\skv@akterpush{\futurelet\next\skv@akterpush@a}
+% Use star variant of \skvrobustdef here, to catch \par:
+\skvrobustdef*\skv@akterpush@a#1{%
+ \skvifntypeTF{#1}{%
+ \skvifxTF{#1}\akterloop{%
+ \skvadvanceno\skv@aktercnt\@ne
+ \skv@akter@defloop
+ \skv@aktertoks\expandafter
+ {\the\expandafter\skv@aktertoks\skv@tempa}%
+ \skv@akterpush
+ }{%
+ \skvifstrcmpTF{#1}\repeat{%
+ \skvifnumTF\skv@aktercnt=\skvz@{%
+ \expandafter\endgroup\the\skv@aktertoks\repeat
+ }{%
+ \skv@aktertoks\expandafter
+ {\the\expandafter\skv@aktertoks\skv@tempb}%
+ \skvadvanceno\skv@aktercnt\m@ne
+ \skv@akterpush
+ }%
+ }{%
+ \skvifxTF\next\@sptoken{%
+ \skv@aktertoks\expandafter
+ {\the\expandafter\skv@aktertoks\@space#1}%
+ }{%
+ \skv@aktertoks\expandafter{\the\skv@aktertoks#1}%
+ }%
+ \skv@akterpush
+ }%
+ }%
+ }{%
+ \skvifstrcmpTF{#1}{EOF}{%
+ \skv@err{'\string\repeat' not found: endless loop}\skv@ehd
+ }{%
+ \skvifxTF\next\@sptoken{%
+ \skv@aktertoks\expandafter
+ {\the\expandafter\skv@aktertoks\space{#1}}%
+ }{%
+ \skv@aktertoks\expandafter{\the\skv@aktertoks{#1}}%
+ }%
+ \skv@akterpush
+ }%
+ }%
+}
+
+% Expandable comma loop. List is not normalized prior to parsing, and
+% it is not possible to terminate the loop prematurely.
+%
+% \lpsfor{<list>}<callback.macro>
+%
+% Example:
+%
+% \skvnewregister\count{\nr}\nr=\tw@
+% \def\do#1{%
+% \let\noexpand#1%
+% \expandafter\noexpand\csname\skvremovescape{#1}@%
+% \romannumeral\nr\endcsname
+% }
+% \edef\x{\lpsfor{\cmda,\cmdb}\do}
+% \show\x -> \let\cmda\cmda@ii \let\cmdb\cmdb@ii
+%
+\skvnewdef\skvfor#1#2{\skv@for@a{#2}#1,\skv@for@nil,}
+\skvnewdef\skv@for@a#1#2,{%
+ \skvifblankTF{#2}{%
+ \skv@for@a{#1}%
+ }{%
+ \skvifstrcmpTF{#2}\skv@for@nil{}{#1{#2}\skv@for@a{#1}}%
+ }%
+}
+\skvnewlet\lpsfor\skvfor
+% Process non-separated (token-wise) list. \ayeloop is like \skvtfor
+% but uses parameter characters directly, instead of a holder macro.
+%
+% \ayeloop{<list>}\do{<1.parameter.callback>}
+% \ayeloop*{<listcmd>}\do{<1.parameter.callback>}
+%
+% \ayeloop abcd\do{%
+% \def\nr{0}%
+% \ayeloop 12345\do{%
+% \typeout{Doing #1--##1}%
+% \skvpushnumber\nr
+% \ifnum\nr>3\relax\skvbreakloop\fi
+% }%
+% }%
+%
+\skvrobustdef*\ayeloop{\skv@testst\skv@ayeloop}
+\skvrobustdef*\skv@ayeloop#1\do#2{%
+ \skv@usetempst{#1}\skv@tempa
+ \skvsavestate\ayeloop{\do\skv@ayeloop}\skv@csvdepth
+ \def\skv@ayeloop##1{%
+ \skvifstrcmpTF{##1}\skv@tfor@nil{%
+ \skvbreakloopfalse
+ }{%
+ #2\relax
+ \ifskvbreakloop
+ \skvbreakloopfalse
+ \begingroup
+ \def\skv@ayeloop####1\skv@tfor@nil{%
+ \endgroup
+ \edef\skvremainder{\unexpanded{####1}}%
+ }%
+ \fi
+ \skv@ayeloop
+ }%
+ }%
+ \skvbreakloopfalse
+ \expandafter\skv@ayeloop\skv@tempa\skv@tfor@nil
+ \skvrestorestate\ayeloop\skv@csvdepth
+}
+
+% Robust, outer-brace-preserving, multi-level, general-purpose
+% non-separated values list (nsv/tsv) processor.
+%
+% \sifakaloop{<list>}{<1.parameter.callback>}
+% \sifakaloop*{<listcmd>}{<1.parameter.callback>}
+%
+\skvnewdef*\skv@tsvnil{\skv@tsvnil}
+\skvrobustdef*\sifakaloop{\skv@testst\skv@sifakaparse@a}
+\skvrobustdef*\skv@sifakaparse@a#1#2{%
+ \skv@usetempst{#1}\skv@sifakaarg
+ \skvsavestate\sifakaloop{\do\skv@user@do}\skv@csvdepth
+ \def\skv@user@do##1{#2}%
+ \edef\skv@sifakaarg{%
+ \expandafter\skvtsvnormalize\expandafter{\skv@sifakaarg}%
+ }%
+ \skvbreakloopfalse
+ \skvifemptyTF\skv@sifakaarg{%
+ \ifskvprocessempty\skv@user@do{}\fi
+ }{%
+ \expandafter\skv@sifakaparse@b\skv@sifakaarg\skv@tsvnil
+ }%
+ \skvrestorestate\sifakaloop\skv@csvdepth
+ \ifnum\skv@csvdepth=\skvz@\skvundef\skv@user@do\fi
+}
+\skvrobustdef*\skv@sifakaparse@b{%
+ \begingroup
+ \let\bgroup\relax
+ \skvifnextchar\skv@orig@bgroup{%
+ \let\skv@next\skv@orig@bgroup
+ \skv@sifakaparse@c
+ }{%
+ \let\skv@next\relax
+ \skv@sifakaparse@c
+ }%
+}
+\skvrobustdef*\skv@sifakaparse@c#1{%
+ \skvifxTF\skv@next\skv@orig@bgroup{%
+ \endgroup
+ \edef\skv@sifakaarg{{\unexpanded{#1}}}%
+ }{%
+ \endgroup
+ \edef\skv@sifakaarg{\unexpanded{#1}}%
+ }%
+ \skvifxTF\skv@sifakaarg\skv@tsvnil{%
+ \skvbreakloopfalse
+ }{%
+ \skvifxTF\skv@sifakaarg\skv@listbreakertoks{%
+ \skvbreakloop
+ }{%
+ \skvifemptyTF\skv@sifakaarg{%
+ \ifskvprocessempty\skv@user@do{}\fi
+ }{%
+ \expandafter\skv@user@do\expandafter{\skv@sifakaarg}\relax
+ }%
+ \skvifdefboolTF{skvbreakloop}{%
+ \skvbreakloopfalse
+ \begingroup
+ \def\skv@prova##1\skv@tsvnil{%
+ \endgroup
+ \edef\skvremainder{\unexpanded{##1}}%
+ }%
+ \skv@prova
+ }{%
+ \skv@sifakaparse@b
+ }%
+ }%
+ }%
+}
+
+% Processing both csv and tsv/nsv lists with \foreachfox.
+%
+% \foreachfox[<options>]{<list>}{<parametered.callback>}
+% \foreachfox*[<options>]{<listcmd>}{<parametered.callback>}
+%
+% 1. The <callback> is at least a one-parameter token list.
+%
+% 2. \breakforeachfox can be used to break out of the current nest loop.
+% \breakallforeachloops can be used to break out of all current loops.
+%
+% 3. When the argument is more than one (say, #1#2), the last one
+% must be delimited by the user-suggested <arg delimiter>.
+%
+% 4. To permit nesting we use a stack involving the counter \foreachnestdepth.
+%
+% 5. \subcallback is meant for callbacks with hash characters that may be
+% confused with the parameters of the main <callback>. It can be defined
+% outside <callback> and called within <callback>.
+%
+% 6. Outer braces around the list items are preserved in the parsing.
+%
+% 7. The following are available here, as in \newforeach:
+%
+% \foreachcurrentitem, \foreachnextitem, \foreachitemcount,
+% \foreachprevitem, \prependtobeginforeach, \appendtobeginforeach
+% (=\atbeginforeach), \prependtoendforeach, \appendtoendforeach
+% (=\atendforeach), \ifforeachlastitem, \foreachnestdepth,
+% \foreachlistremainder, \skvforeachonlyinitially.
+%
+\skvnewregisters\bool{\iflastfox}
+\skvnewlet\breakforeachfox\skvbreaklooptrue
+% \atbeginforeachfox[<depth>]{<code>}
+\skvnewlet\atbeginforeachfox\atbeginforeach
+% \atendforeachfox[<depth>]{<code>}
+\skvnewlet\atendforeachfox\atendforeach
+
+% Define \foreachfox keys. Name all the macros with 'foreach' prefix so
+% that we can avoid new command names and use the list auto-completion
+% scheme of \newforeach.
+\skvquickkeys.define{loops/foreachfox}{%
+ parser/{,}/
+ \def\skv@foreach@parser{#1}
+ \skvstripouterbraces{2}\skv@foreach@parser
+ ;
+ list type/csv/\def\skv@foreach@listtype{#1}/csv,kv,tsv,nsv;
+ arg,args,arg pattern/##1/
+ \edef\skv@foreach@paramlist{\unexpanded{#1}}
+ \skvstripouterbraces{1}\skv@foreach@paramlist
+ ;
+ list breaker/\foreachlistbreaker/\def\skv@listbreakertoks{#1};
+ list pauser/\foreachlistpauser/\def\skv@listpausertoks{#1};
+ normalize list/true/
+ \edef\skv@foreach@normalizelist{0\skvifstrcmpTF{#1}{true}01}
+ /true,false
+ ;
+ use empty,use empty items/true/
+ \edef\skv@foreach@useempty{0\skvifstrcmpTF{#1}{true}01}
+ /true,false
+ ;
+ .exec/\let\skv@foreach@exittester\@secondoftwo;
+ break,loop stopper,exit when/\if01\fi/
+ \edef\skv@tempa{\unexpanded{#1}}
+ \skvstripouterbraces{2}\skv@tempa
+ \skvexpbracenext\skv@foreach@maketester\skv@tempa
+ \skv@foreach@exittester\@ne
+ ;
+ .exec/\let\skv@foreach@continuetester\@secondoftwo;
+ continue,ignore callback/\if01\fi/
+ \edef\skv@tempa{\unexpanded{#1}}%
+ \skvstripouterbraces{2}\skv@tempa
+ \skvexpbracenext\skv@foreach@maketester\skv@tempa
+ \skv@foreach@continuetester\skvz@
+ ;
+ item counter,counter/\foreachdefaultitemcounter/
+ \skvifescapedTF{#1}{%
+ \def\skv@foreach@itemcounter{#1}%
+ }{%
+ \skv@err{Non-escaped value '\detokenize{#1}'
+ \MessageBreak for key 'item counter'}\skv@ehd
+ }%
+ ;
+ process up to,process up to number//
+ \skviflacus#1\then\else
+ \skvensureinteger{process up to}{#1}%
+ \def\skv@foreach@processupto{#1}%
+ \skvstripouterbraces{2}\skv@foreach@processupto
+ \fi
+ ;
+ % This default value of 'link' is required by \skvautocompletelist:
+ .exec/\def\skv@foreach@link{\@nil};
+ link/\@nil/
+ \edef\skv@prova{\unexpanded{#1}}
+ \ifx\skv@prova\@nnil\else
+ \edef\skv@foreach@link{\unexpanded{#1}}
+ \skvstripouterbraces{2}\skv@foreach@link
+ \fi
+ ;
+ grow/\@nil/
+ \edef\skv@prova{\unexpanded{#1}}%
+ \ifx\skv@prova\@nnil\else
+ \skvcsedef{skv@foreach@grow#1}{00}%
+ \edef\skv@prova{\skvifstrcmpTF{#1}{left}{right}{left}}%
+ \skvcsedef{skv@foreach@grow\skv@prova}{01}%
+ \fi
+ /left,right
+ ;
+ .exec/
+ \def\skv@foreach@growleft{01}%
+ \def\skv@foreach@growright{01}%
+ ;
+ grow left/true/
+ \edef\skv@foreach@growleft{0\skvifstrcmpTF{true}{#1}01}%
+ \edef\skv@foreach@growright{0\skvifstrcmpTF{true}{#1}10}%
+ /true,false
+ ;
+ grow right/true/
+ \edef\skv@foreach@growright{0\skvifstrcmpTF{true}{#1}01}%
+ \edef\skv@foreach@growleft{0\skvifstrcmpTF{true}{#1}10}%
+ /true,false
+ ;
+ % Keep the decimals in rounded numbers or dimensions when list is
+ % auto-completed. The value value of this key is 'true'.
+ keep decimals/true/
+ \edef\skv@foreach@keepdecimals{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ keep high decimals,keep only high decimals/true/
+ \edef\skv@foreach@keephighdecimals{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ expand before fill,expand list before fill/true/
+ \edef\skv@foreach@expandbeforefill{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ expand list once,*,list is a macro,macro list/true/
+ \edef\skv@foreach@expandlistonce{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ expand list twice/true/
+ \edef\skv@foreach@expandlisttwice{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ % Don't use 'expand' for the key 'expand list':
+ expand list,fully expand list,expand list fully/true/
+ \edef\skv@foreach@expandlistfully{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+ % Eg, 'evaluate = #1 as \x using \numexpr#1*2'.
+ % Since the parameters haven't assumed arguments, we defer the
+ % call to \skv@foreachfox@parseevaluate until the arguments are known.
+ evaluate/\@nil/
+ \skv@foreach@ifacceptkv{#1}{%
+ \skv@foreachfox@parseevaluate{#1}%
+ }%
+ ;
+ % Eg,
+ % 'count in = \p all #1 satisfying \ifnum#1>4\fi initially 2'
+ % 'count in = \p all #1 satisfying \ifnum#1>4\fi'
+ count in,count/\@nil/
+ \skv@foreach@ifacceptkv{#1}{%
+ \skv@foreachfox@parsecountin{#1}%
+ }%
+ ;
+ % Eg, remember=#1 as \y initially A
+ remember/\@nil/
+ \skv@foreach@ifacceptkv{#1}{%
+ \skv@foreachfox@parseremember{#1}%
+ }%
+ ;
+ reverse list,reverse,reflect/true/
+ \edef\skv@foreach@reverselist{0\skvifstrcmpTF{true}{#1}01}%
+ /true,false
+ ;
+}
+\skvquickkeys.preset{loops/foreachfox}{%
+ parser={,},list type=csv,arg=#1,loop stopper,
+ list breaker=\foreachlistbreaker,list pauser=\foreachlistpauser,
+ normalize list=true,use empty=false,keep decimals=true,
+ keep high decimals=false,expand before fill=false,
+ reverse list=false,expand list once=false,expand list twice=false,
+ expand list fully=false,
+}
+
+% Parser for 'evaluate' key:
+%
+% Eg, 'evaluate = #1 as \x using \numexpr#1*2'.
+%
+% \skv@foreachfox@parseevaluate differs from \skv@foreach@parseevaluate
+% because #1 here is likely to be a non-macro.
+%
+\skvrobustdef*\skv@foreachfox@parseevaluate#1{%
+ \begingroup
+ \def\skv@tempxifin##1##2{%
+ \skvxifinTF{\detokenize{##1}}{\detokenize{##2}}%
+ }%
+ \def\skv@tempd{}%
+ % <formula> #3 can be empty. So we don't test for its emptiness here.
+ \def\skv@tempa##1as##2using##3\skv@nil{%
+ \edef\skv@prova{\skvtrimspace{##1}}%
+ \edef\skv@provb{\skvtrimspace{##2}}%
+ \edef\skv@provc{\skvtrimspace{##3}}%
+ \ifx\skv@prova\@empty
+ \skv@err{Value of key 'evaluate':
+ \MessageBreak no quantity to evaluate}\skv@ehd
+ \fi
+ \ifx\skv@provb\@empty
+ \skv@err{Value of key 'evaluate' has no receiving macro,
+ \MessageBreak i.e., after 'as'}\skv@ehd
+ \else
+ \expandafter\skvifescapedTF\expandafter{\skv@provb}{}{%
+ \skv@err{Value of key 'evaluate': receiving macro
+ \MessageBreak \skvoxdetok\skv@provb not escaped}\skv@ehd
+ }%
+ \fi
+ \ifx\skv@provc\@empty
+ \skv@err{Value of key 'evaluate' has no formula}\skv@ehd
+ \fi
+ \skv@tempxifin{\pgfmathparse}{##3}{%
+ \def\skv@tempc####1\pgfmathparse####2\skv@nil{%
+ \ifx\@nnil####1\@nnil
+ \ifdefined\pgfmathparse
+ \skv@foreach@swatrue
+ \else
+ \skv@err{\noexpand\pgfmathparse isn't defined;
+ \MessageBreak maybe 'pgfmath' isn't loaded}\skv@ehd
+ \fi
+ \else
+ \skv@err{Invalid token \detokenize{####1}
+ \MessageBreak before \string\pgfmathparse}\skv@ehd
+ \fi
+ }%
+ \expandafter\skv@tempc\skv@provc\skv@nil
+ }{%
+ \skv@foreach@swafalse
+ \skv@tempxifin{\numexpr}{##3}{%
+ \def\skv@tempd{\relax}%
+ }{%
+ \skv@tempxifin{\dimexpr}{##3}{%
+ \def\skv@tempd{\relax}%
+ }{%
+ \def\skv@tempd{}%
+ }%
+ }%
+ }%
+ }%
+ \skv@tempxifin{using}{#1}{%
+ \skv@tempxifin{as}{#1}{%
+ % 'as' and 'using' are present: there is a formula.
+ \skv@foreach@swbtrue
+ \skv@tempa#1\skv@nil
+ }{%
+ \skv@err{Value of key 'evaluate':
+ \MessageBreak there is 'using', but no 'as'}\skv@ehd
+ }%
+ }{%
+ % No formula given:
+ \skv@foreach@swbfalse
+ \skv@tempxifin{as}{#1}{%
+ \def\skv@tempb##1as##2##3\skv@nil{%
+ \ifx\@nnil##1\@nnil
+ \skv@err{Value of key 'evaluate' has no
+ \MessageBreak quantity to evaluate}\skv@ehd
+ \else
+ \ifx\@nnil##2%
+ \skv@err{Value of key 'evaluate' has no receiving macro}\skv@ehd
+ \else
+ \skv@tempa##1as##2using##1\skv@nil
+ \fi
+ \fi
+ }%
+ \skv@tempb#1{\@nnil}\skv@nil
+ }{%
+ % No 'as' or 'using'. In \foreachfox, #1 is not guaranteed
+ % to be a macro. Hence raise error here:
+ \skv@err{Value of key 'evaluate' has no 'as'}\skv@ehd
+ }%
+ }%
+ \skv@foreach@addtocallback{pre}{%
+ \ifskv@foreach@swa
+ % Here, <formula> may have the syntax \pgfmathparse{<token>}.
+ \skvexpandonce\skv@provc
+ \let\skvexpandonce\skv@provb\noexpand\pgfmathresult
+ \else
+ % Here, <formula> may have the syntax \numexpr\x*2 or \dimexpr\x*2.
+ \edef\skvexpandonce\skv@provb{%
+ \ifskv@foreach@swb\noexpand\the\fi
+ \skvexpandonce\skv@provc\skvexpandonce\skv@tempd
+ }%
+ \fi
+ }%
+ \skvaftergroupdef\skv@foreach@precallback\endgroup
+}
+
+% Eg, 'count in \y all #1 satisfying \ifnum#1>2\fi initially 0'.
+%
+% 1. <condition> must be a balanced and valid TeX or LaTeX (2-fork)
+% conditional, like
+%
+% \ifnum\x>2\fi, \ifx\x\@empty\fi
+%
+% 2. The aim is to allow general conditions (not only those involving
+% numerals) to be submitted.
+%
+% 3. PGF's \foreach doesn't have this feature; it has only a general
+% counter, eg,
+%
+% '\foreach \x [count=\xi from 2] in {a,...,e}'.
+%
+% Generic counting is available in \foreachfox by default, without
+% user request. The macros \foreachcurrentitem, \foreachitemcount,
+% \foreachnextitem are always available on each nesting level.
+% The boolean \ifforeachlastitem is also always available, to indicate
+% when the last item of the list has been reached:
+%
+% \ifforeachlastitem\typeout{Processing last entry of the list} \fi
+%
+\skvrobustdef*\skv@foreachfox@parsecountin#1{%
+ \begingroup
+ \def\skv@tempxifin##1##2{%
+ \skvxifinTF{\detokenize{##1}}{\detokenize{##2}}%
+ }%
+ \def\skv@tempa##1\skv@nil{%
+ \skv@tempxifin{initially}{##1}{%
+ \skv@tempb##1\skv@nil
+ }{%
+ \skv@tempb##1initially\skv@nil
+ }%
+ }%
+ \def\skv@tempb##1all##2satisfying##3initially##4\skv@nil{%
+ \edef\skv@prova{\skvtrimspace{##1}}%
+ \edef\skv@provb{\skvtrimspace{##2}}%
+ \edef\skv@provc{\skvtrimspace{##3}}%
+ \edef\skv@provd{\skvtrimspace{##4}}%
+ \ifx\skv@prova\@empty
+ \skv@err{Value of key 'count' has no counter macro}\skv@ehd
+ \else
+ \expandafter\skvifescapedTF\expandafter{\skv@prova}{}{%
+ \skv@err{Value of key 'count':\MessageBreak
+ counter macro \skvoxdetok\skv@prova not escaped}\skv@ehd
+ }%
+ \fi
+ \ifx\skv@provd\@empty
+ \expandafter\def\skv@prova{0}%
+ \else
+ \skvifintegerTF\skv@provd{%
+ \expandafter\let\skv@prova\skv@provd
+ }{%
+ \skv@err{Value of key 'count':\MessageBreak
+ initial \skvoxdetok\skv@provd not an integer}\skv@ehd
+ }%
+ \fi
+ \skv@foreach@swafalse
+ \ifx\skv@provc\@empty
+ % No tester but there may be a quantity to test. The quantity,
+ % on its own, isn't sufficient to conduct a test:
+ \let\skv@foreach@itemcounter\skv@prova
+ \else
+ % If there isn't a quantity to test, then no test is possible:
+ \ifx\skv@provb\@empty\else
+ \skv@foreach@swatrue
+ % \skv@tester is the second argument of \skv@foreach@maketester,
+ % which is used below:
+ \skvexpbracenext\skv@foreach@maketester\skv@provc\skv@tester\skvz@
+ \fi
+ \fi
+ }%
+ \skv@tempxifin{satisfying}{#1}{%
+ \skv@tempxifin{all}{#1}{%
+ % 'all' and 'satisfying' are present:
+ \skv@tempa#1\skv@nil
+ }{%
+ \skv@err{Value of key 'count':
+ \MessageBreak there is 'satisfying', but no 'all'}\skv@ehd
+ }%
+ }{%
+ \skv@tempxifin{all}{#1}{%
+ \skv@tempa#1satisfying\skv@nil
+ }{%
+ % No 'all' and 'satisfying': #1 should be only the counter macro:
+ \ifx\@nnil#1\@nnil
+ \skv@err{Value of key 'count': no counter macro}\skv@ehd
+ \else
+ \skvifntypeTF{#1}{%
+ \skv@tempa#1all satisfying\skv@nil
+ }{%
+ \skv@err{Value of key 'count in': more than 1
+ \MessageBreak token '\detokenize{#1}'.
+ \MessageBreak I can't find counter macro}\skv@ehd
+ }%
+ \fi
+ }%
+ }%
+ \ifskv@foreach@swa
+ \skv@foreach@addtocallback{pre}{%
+ \noexpand\ifnum\noexpand\foreachitemcount=\@ne
+ \def\skvexpandonce\skv@prova{\number\skv@prova}%
+ \noexpand\fi
+ \skvexpandonce\skv@tester{%
+ \noexpand\skvpushnumber\skvexpandonce\skv@prova
+ }{}%
+ }%
+ \fi
+ \skvexpanded{\endgroup
+ \ifskv@foreach@swa
+ \skvcmdexit\skv@foreach@precallback
+ \else
+ \skvcmdexit\skv@foreach@itemcounter
+ \fi
+ }%
+}
+
+% remember=<holder.macro> as <child.macro> initially <value>
+%
+\skvrobustdef*\skv@foreachfox@parseremember#1{%
+ \begingroup
+ \def\skv@tempxifin##1##2{%
+ \skvxifinTF{\detokenize{##1}}{\detokenize{##2}}%
+ }%
+ \skv@tempxifin{(}{#1}{%
+ \skv@err{Value of key 'remember': '(' found.
+ \MessageBreak I don't accept this PGF format.
+ \MessageBreak Remove the parenthesis around '(<your input>)'}\skv@ehd
+ }{}%
+ \def\skv@tempa##1as##2initially##3\skv@nil{%
+ \edef\skv@prova{\skvtrimspace{##1}}%
+ \edef\skv@provb{\skvtrimspace{##2}}%
+ \edef\skv@provc{\skvtrimspace{##3}}%
+ \skv@foreach@swafalse
+ \ifx\skv@prova\@empty
+ \skv@err{Value of key 'remember' has no value to remember}\skv@ehd
+ \fi
+ \ifx\skv@provb\@empty
+ \skv@err{Value of key 'remember' has no child macro;
+ \MessageBreak i.e., no macro after 'as'}\skv@ehd
+ \else
+ \expandafter\skvifescapedTF\expandafter{\skv@provb}{%
+ \skv@foreach@swatrue
+ }{%
+ \skv@err{Value of key 'remember':
+ \MessageBreak child \skvoxdetok\skv@provb not escaped}\skv@ehd
+ }%
+ \fi
+ }%
+ \skv@tempxifin{initially}{#1}{%
+ \skv@tempxifin{as}{#1}{%
+ \skv@tempa#1\skv@nil
+ }{%
+ \skv@err{Value of key 'remember':
+ \MessageBreak there is 'initially', but no 'as'}\skv@ehd
+ }%
+ }{%
+ \skv@tempxifin{as}{#1}{%
+ \skv@tempa#1initially\skv@nil
+ }{%
+ % No 'as' and 'initially':
+ \ifx\@nnil#1\@nnil\else
+ % Unlike in \newforeach, we can't create an automatic retainer
+ % macro here, since \foreachfox uses parameters instead of
+ % holder macros.
+ \skv@err{Value of key 'remember' is incomplete: no 'as'}\skv@ehd
+ \fi
+ }%
+ }%
+ \ifskv@foreach@swa
+ % Initially:
+ \skv@foreach@addtocallback{pre}{%
+ % Don't remove this \ifnum, otherwise the initial assignment
+ % will be overwritten on subsequent returns:
+ \noexpand\ifnum\noexpand\foreachitemcount=\@ne
+ \edef\skvexpandonce\skv@provb{%
+ \noexpand\unexpanded{\skvexpandonce\skv@provc}%
+ }%
+ \noexpand\fi
+ }%
+ \skv@foreach@addtocallback{post}{%
+ \edef\skvexpandonce\skv@provb{%
+ \noexpand\unexpanded{\skvexpandonce\skv@prova}%
+ }%
+ }%
+ \fi
+ \skvexpanded{\endgroup
+ \ifskv@foreach@swa
+ \skvcmdexit\skv@foreach@precallback
+ \skvcmdexit\skv@foreach@postcallback
+ \fi
+ }%
+}
+
+\skvnewdef*\skv@foreachfox@kvlist{}
+% \setupforeachfox{<kvlist>}
+\skvrobustdef*\setupforeachfox#1{%
+ \skvifblankTF{#1}{}{%
+ \skvaddtolist\skv@foreachfox@kvlist{#1}%
+ }%
+}
+\skvrobustdef*\skv@foreachfox@setkeys#1{%
+ \def\reserved@a{\skvquickkeys.set{loops/foreachfox}}%
+ \expandafter\reserved@a\expandafter{\skv@foreachfox@kvlist,#1}%
+}
+\skvrobustdef*\foreachfox{%
+ \skv@inforeachtrue
+ \skvifnextchar i{%
+ \skv@foreachfox@prescan@a
+ }{%
+ \skv@teststopt\skv@foreachfox@prescan@b{}%
+ }%
+}
+\skvrobustdef*\skv@foreachfox@prescan@a#1#2{%
+ \skvifstrcmpTF{#1#2}{in}{%
+ \skv@teststopt\skv@foreachfox@prescan@b{}%
+ }{%
+ \skv@err{I have found 'i' before opening brace or
+ \MessageBreak bracket, but no 'in'}\skv@ehd
+ }%
+}
+\skvrobustdef*\skv@foreachfox@prescan@b[#1]{%
+ \skvifnextchar i{%
+ \skv@foreachfox@prescan@c[#1]%
+ }{%
+ \skv@foreachfox@a[#1]%
+ }%
+}
+\skvrobustdef*\skv@foreachfox@prescan@c[#1]#2#3{%
+ \skvifstrcmpTF{#2#3}{in}{%
+ \skv@foreachfox@a[#1]%
+ }{%
+ \skv@err{I have found 'i' after '[]', but no 'in'}\skv@ehd
+ }%
+}
+\skvrobustdef*\skv@foreachfox@a[#1]#2#3{%
+ \edef\skv@foreach@starform{0\ifskv@tempst0\else1\fi}%
+ \skv@foreach@pushstate
+ \skv@foreach@latehookerr
+ \def\foreachitemcount{0}%
+ \def\do##1{\def##1{}}%
+ \do\skv@foreach@itemcounter\do\skv@foreach@processupto
+ \do\skv@foreach@callback\do\skv@foreach@auxcallback
+ \do\skv@foreach@precallback\do\skv@foreach@afterprecallback
+ \do\skv@foreach@postcallback\do\skv@foreach@onlyinitially
+ \skv@foreachfox@setkeys{#1}%
+ \if\skv@foreach@starform
+ \def\skv@foreach@expandlistonce{00}%
+ \fi
+ \ifcase0%
+ % Take only one case:
+ \if\skv@foreach@expandlistonce\else
+ \if\skv@foreach@expandlisttwice\else
+ \if\skv@foreach@expandlistfully\else 1\fi\fi\fi\relax
+ \def\skv@foreach@listisamacro{00}%
+ \else
+ \def\skv@foreach@listisamacro{01}%
+ \skvifmacroFT{#2}{}{%
+ \ifskv@verbose
+ \skv@warn{One-item list '\detokenize{#2}' is a macro.
+ \MessageBreak If your list is indeed a macro, you can
+ \MessageBreak either put star (*) after \noexpand\foreachfox
+ \MessageBreak or use the key 'expand list once'
+ \MessageBreak or 'expand list twice' or 'list is a macro', etc}%
+ \fi
+ }%
+ \fi
+ \edef\skv@foreach@userlist{%
+ \if\skv@foreach@expandlistonce
+ \expandafter\skvexpandonce
+ \else
+ \if\skv@foreach@expandlisttwice
+ \expandafter\expandafter\expandafter\skvexpandtwice
+ \else
+ \if\skv@foreach@expandlistfully
+ \expandafter\expandafter\expandafter\expandafter
+ \expandafter\expandafter\expandafter\@iden
+ \else
+ \expandafter\expandafter\expandafter\expandafter
+ \expandafter\expandafter\expandafter\unexpanded
+ \fi
+ \fi
+ \fi
+ {#2}%
+ }%
+ \skvcsuse{skv@foreach@atbeginhook@\skvrom\foreachnestdepth}%
+ \skvifdefTF\foreachprevitem{}{\def\foreachprevitem{}}%
+ % Define the loop callback:
+ \edef\reserved@a{%
+ \skvexpandonce\skv@foreach@precallback
+ \ifx\skv@foreach@onlyinitially\@empty\else
+ \noexpand\ifnum\noexpand\foreachitemcount=\@ne
+ \skvexpandonce\skv@foreach@onlyinitially
+ \noexpand\fi
+ \fi
+ \ifx\skv@foreach@continuetester\@secondoftwo
+ \noexpand\skv@foreach@continuetester
+ \else
+ % We want to expose the parameter characters in
+ % \skv@foreach@continuetester:
+ \skvexpandonce\skv@foreach@continuetester
+ \fi
+ {}{%
+ \unexpanded{#3}%
+ \skvexpandonce\skv@foreach@postcallback
+ }%
+ }%
+ \edef\reserved@b{%
+ \def\noexpand\skv@foreach@callback\skvexpandonce
+ \skv@foreach@paramlist\noexpand\foreacheov
+ }%
+ \expandafter\reserved@b\expandafter{\reserved@a}%
+ \skvxifstrcmpTF\skv@foreach@listtype{csv}{%
+ \def\skv@foreach@lookahead@a##1{%
+ \def\skv@foreach@picknext{##1.}%
+ \futurelet\skv@foreach@next\skv@foreach@lookahead@b
+ }%
+ \def\skv@foreach@lookahead@c[##1]{\skv@foreach@picknext[{##1}]}%
+ \def\skv@foreach@lookahead@d(##1){\skv@foreach@picknext({##1})}%
+ }{%
+ % Token list (nsv/tsv):
+ \def\skv@foreach@lookahead@a##1{%
+ \let\skv@foreach@picknext##1%
+ \futurelet\skv@foreach@next\skv@foreach@lookahead@b
+ }%
+ % These \skv@foreach@lookahead@c and \skv@foreach@lookahead@d
+ % differ from those for 'csv' list (above):
+ \def\skv@foreach@lookahead@c[##1]{\skv@foreach@picknext{[##1]}}%
+ \def\skv@foreach@lookahead@d(##1){\skv@foreach@picknext{(##1)}}%
+ }%
+ \def\skv@foreach@lookahead@b{%
+ \skvifxTF\skv@foreach@next[{%
+ \skv@foreach@parenthesistrue\skv@foreach@lookahead@c
+ }{%
+ \skvifxTF\skv@foreach@next({%
+ \skv@foreach@parenthesistrue\skv@foreach@lookahead@d
+ }{%
+ \skv@foreach@parenthesisfalse\skv@foreach@picknext
+ }%
+ }%
+ }%
+ \ifnum\foreachnestdepth=\skvz@
+ \breakallforeachloopsfalse
+ \fi
+ \skvbreakloopfalse\foreachlastitemfalse\lastfoxfalse
+ \def\reserved@a##1{%
+ \skv@setupgetnextfox{##1}%
+ \skvxifstrcmpTF\skv@foreach@listtype{csv}{%
+ \if\skv@foreach@normalizelist
+ \skv@foreach@normalize[##1]\skv@foreach@userlist
+ \fi
+ \def\skv@foreach@do@a####1##1####2\skv@foreach@stop{%
+ \edef\foreachcurrentitem{\skvexpandonce{\@gobble####1}}%
+ \skv@foreachfox@b{##1}{####2}{csv}%
+ }%
+ \skvifemptyTF\skv@foreach@userlist{}{%
+ \def\do####1{\if####1true\else false\fi}%
+ \skvexpandsecond{\skvautocompletelist*}{[%
+ % Note: the value of 'expand list once', etc., can't be
+ % transferred automatically to \skvautocompletelist since they
+ % have been used above.
+ parser={\skv@foreach@parser},
+ link={\skvexpandonce\skv@foreach@link},
+ grow left=\do\skv@foreach@growleft,
+ grow right=\do\skv@foreach@growright,
+ keep decimals=\do\skv@foreach@keepdecimals,
+ keep high decimals=\do\skv@foreach@keephighdecimals,
+ expand before fill=\do\skv@foreach@expandbeforefill
+ ]}\skv@foreach@userlist\skv@foreach@userlist
+ \if\skv@foreach@reverselist
+ \expandafter\skv@foreach@doreverselist\expandafter
+ {\skv@foreach@parser}\skv@foreach@userlist
+ \fi
+ }%
+ % If \skv@foreach@userlist is empty, \foreachcurrentitem in
+ % \skv@foreachfox@c will terminate the loop.
+ \expandafter\skv@foreach@lookahead@a\expandafter\skv@foreach@do@a
+ \skv@foreach@userlist##1\skv@foreach@nil##1\skv@foreach@stop
+ }{%
+ \if\skv@foreach@normalizelist\skvafterfi
+ \edef\skv@foreach@userlist{%
+ \skvexpbracenext\skvtsvnormalize\skv@foreach@userlist
+ }%
+ \fi
+ \def\skv@foreach@do@a{%
+ \let\bgroup\relax
+ \futurelet\skv@foreach@next\skv@foreach@do@b
+ }%
+ \def\skv@foreach@do@b####1####2\skv@foreach@stop{%
+ \let\bgroup\skv@orig@bgroup
+ \ifskv@foreach@parenthesis
+ \edef\foreachcurrentitem{\unexpanded{####1}}%
+ \else
+ \skvifxTF\skv@foreach@next\bgroup{%
+ \edef\foreachcurrentitem{{\unexpanded{####1}}}%
+ }{%
+ \edef\foreachcurrentitem{\unexpanded{####1}}%
+ }%
+ \fi
+ \skv@foreachfox@b{}{####2}{tsv}%
+ }%
+ \expandafter\skv@foreach@lookahead@a\expandafter\skv@foreach@do@a
+ \skv@foreach@userlist\skv@foreach@nil\skv@foreach@stop
+ }%
+ }%
+ \expandafter\reserved@a\expandafter{\skv@foreach@parser}%
+ \skvcsuse{skv@foreach@atendhook@\romannumeral\foreachnestdepth}%
+ \skv@foreach@popstate
+ \skv@inforeachfalse
+}
+% \skv@setupgetnextfox<parser>
+\skvrobustdef*\skv@setupgetnextfox#1{%
+ \skvxifstrcmpTF\skv@foreach@listtype{csv}{%
+ \def\skv@foreach@getnext##1#1##2\skv@foreach@stop{%
+ \edef\foreachnextitem{\skvexpandonce{\@gobble##1}}%
+ % See \skv@foreachfox@c for \foreachlastitemtrue.
+ }%
+ }{%
+ \def\skv@foreach@getnext{%
+ \let\bgroup\relax
+ \futurelet\skv@foreach@next\skv@foreach@g@tnext
+ }%
+ \def\skv@foreach@g@tnext##1##2\skv@foreach@stop{%
+ \let\bgroup\skv@orig@bgroup
+ \ifskv@foreach@parenthesis
+ \edef\foreachnextitem{\unexpanded{##1}}%
+ \else
+ \skvifxTF\skv@foreach@next\bgroup{%
+ \edef\foreachnextitem{{\unexpanded{##1}}}%
+ }{%
+ \edef\foreachnextitem{\unexpanded{##1}}%
+ }%
+ \fi
+ }%
+ }%
+}
+% \skv@foreachfox@b<parser><remainder><list.type>
+\skvrobustdef*\skv@foreachfox@b#1#2#3{%
+ \skvifxTF\foreachcurrentitem\skv@foreach@nnil{%
+ \skvbreakloopfalse\foreachlastitemfalse\lastfoxfalse
+ }{%
+ \skvifxTF\foreachcurrentitem\skv@listbreakertoks{%
+ \skv@foreachfox@getrm{#1}{#2}%
+ }{%
+ \skvifxTF\foreachcurrentitem\skv@listpausertoks{%
+ \message{^^J! List pause:
+ ^^JType x or X to quit, or <RETURN> to proceed^^J}%
+ \bgroup\endlinechar\m@ne\global\read-1 to\@gtempa\egroup
+ \skvexpandarg\lowercase{\def\noexpand\@gtempa{\@gtempa}}%
+ \skvxifstrcmpTF\@gtempa{x}{%
+ \skv@foreachfox@getrm{#1}{#2}%
+ }{%
+ \skv@foreachfox@c{#1}{#2}{#3}%
+ }%
+ }{%
+ \skv@foreachfox@c{#1}{#2}{#3}%
+ }%
+ }%
+ }%
+}
+% \skv@foreachfox@c<parser><remainder><list.type>
+\skvrobustdef*\skv@foreachfox@c#1#2#3{%
+ \skv@foreach@lookahead@a\skv@foreach@getnext#2\skv@foreach@stop
+ \ifx\foreachnextitem\skv@foreach@nnil
+ \foreachlastitemtrue\lastfoxtrue
+ \def\foreachnextitem{}%
+ \fi
+ \edef\foreachitemcount{\the\numexpr\foreachitemcount+1}%
+ \ifx\skv@foreach@itemcounter\@empty\else
+ \expandafter\let\skv@foreach@itemcounter\foreachitemcount
+ \fi
+ \skvifemptyTF\foreachcurrentitem{%
+ \if\skv@foreach@useempty\skvafterfi
+ \skv@foreach@callback\foreacheov
+ \fi
+ }{%
+ % Test for \foreachlistpauser, in case the user decides to continue
+ % after \foreachlistpauser has been picked:
+ \skvifxTF\foreachcurrentitem\skv@listpausertoks{}{%
+ \skvifxTF\skv@foreach@paramlist\skv@simplearg{%
+ \skvexpbracenext\skv@foreach@callback\foreachcurrentitem\foreacheov
+ }{%
+ % Incomplete items like 3 in {1/a,2/b,3} can't be handled by
+ % \foreachfox; see \newforeach.
+ \expandafter\skv@foreach@callback\foreachcurrentitem\foreacheov
+ }%
+ \let\foreachprevitem\foreachcurrentitem
+ }%
+ }%
+ \ifx\skv@foreach@processupto\@empty\else
+ \ifnum\foreachitemcount<\skv@foreach@processupto\relax\else
+ \skvbreakloop
+ \fi
+ \fi
+ \skvifdefboolTF{skvbreakloop}{%
+ \ifbreakallforeachloops\else
+ \skvbreakloopfalse
+ \fi
+ \foreachlastitemfalse\lastfoxfalse
+ \skv@foreachfox@getrm{#1}{#2}%
+ }{%
+ \skv@foreach@lookahead@a\skv@foreach@do@a#2\skv@foreach@stop
+ }%
+}
+% \skv@foreachfox@getrm<parser><remaining.items>
+\skvrobustdef*\skv@foreachfox@getrm#1#2{%
+ \begingroup
+ \def\reserved@a##1\skv@foreach@nil#1{%
+ \endgroup
+ \edef\foreachlistremainder{\unexpanded{##1}}%
+ }%
+ \reserved@a#2%
+}
+
+% \cicadaloop[<parser>]{<list>}<\if...>\fi{<1.parameter.code>}
+% \cicadaloop*[<parser>]{<listcmd>}<\if...>\fi{<1.parameter.code>}
+%
+% 1. When the conditional <\if...> isn't true, the regular code
+% will be executed for every member of the list.
+% 3. \ifskvbreakloop may be used as the conditional in <\if...>.
+% 5. The boolean \iflastcicada is available for accessing the last item
+% of the list. There are also the macros \currentcicada, \lastcicada,
+% \cicadacount, and the counter \cicadanestdepth.
+% 6. \cicadaloop can be nested.
+%
+% Example:
+%
+% \let\romn\romannumeral
+% \@tempcnta\z@
+% \def\blist{{X};{Y};Z;\fi}
+% \def\stack{}
+% \cicadaloop{{a},{b},c,\if}\if01\fi{%
+% \advance\@tempcnta\@ne
+% \@tempcntb\z@
+% \@tempswafalse
+% \cicadaloop*[;]\blist\if@tempswa\fi{%
+% \advance\@tempcntb\@ne
+% \typeout{Doing \romn\@tempcnta,\romn\@tempcntb: \detokenize{#1,##1}}%
+% \edef\stack{%
+% \unexpanded\expandafter{\stack}\noexpand\do
+% {\romn\@tempcnta,\romn\@tempcntb}{\unexpanded{#1;##1}}%
+% }%
+% \ifnum\@tempcntb>\@ne
+% \@tempswatrue
+% \skvcsedef{cmd@\romn\cicadanestdepth}{\lastcicada,\cicadacount}%
+% \fi
+% }%
+% }
+% \show\stack
+%
+\skvnewregisters\bool{\iflastcicada}
+\skvbuildmacrostack\skv@cicada@state{%
+ \do\skv@cicada@do\do\skv@cicada@userlist\do\currentcicada
+ \do\nextcicada\do\cicadacount\do\lastcicada\do\skv@cicada@callback
+ \do\skv@cicada@getnext\do\ifskvprocessempty
+}\skv@stackdepthlimit
+
+\skvnewnumbers{cicadaloopdepth}
+\skvnewlet\skv@cicada@nil\relax
+\skvnewdef*\skv@cicada@nnil{\skv@cicada@nil}
+\skvnewlet\breakcicada\skvbreakloop
+
+\skvrobustdef*\cicadaloop{\skv@teststopt\skv@cicadaloop,}
+\skvrobustdef*\skv@cicadaloop[#1]#2#3\fi#4{%
+ \let\if@cicada@st\ifskv@tempst
+ \skvpushstate\skv@cicada@state\cicadanestdepth
+ \let\ifskv@tempst\if@cicada@st
+ \skv@usetempst{#2}\skv@cicada@userlist
+ \skv@foreach@normalize[#1]\skv@cicada@userlist
+ \def\skv@cicada@callback##1{#4}%
+ \def\lastcicada{}%
+ \def\skv@cicada@getnext##1#1##2\skv@cicada@stop{%
+ \edef\nextcicada{\skvexpandonce{\@gobble##1}}%
+ \ifx\nextcicada\skv@cicada@nnil
+ \lastcicadatrue
+ \def\nextcicada{}%
+ \fi
+ }%
+ \chardef\cicadacount\skvz@
+ \def\skv@cicada@do##1#1##2\skv@cicada@stop{%
+ \edef\currentcicada{\skvexpandonce{\@gobble##1}}%
+ \skvifxTF\currentcicada\skv@cicada@nnil{%
+ \skvbreakloopfalse\lastcicadafalse
+ }{%
+ \skvifxTF\currentcicada\skv@listbreakertoks{%
+ \skvbreakloopfalse\lastcicadafalse
+ }{%
+ \edef\cicadacount{\the\numexpr\cicadacount+1}%
+ \skv@cicada@lookahead@a\skv@cicada@getnext##2\skv@cicada@stop
+ \skvexpandbracenext\skv@cicada@callback\currentcicada\relax
+ \skvifcondFT#3\fi{}\skvbreakloop
+ \skvifdefboolTF{skvbreakloop}{%
+ \skvbreakloopfalse\lastcicadafalse
+ \begingroup
+ \def\skv@prova####1\skv@cicada@nil#1{%
+ \endgroup
+ \edef\skvremainder{\unexpanded{####1}}%
+ }%
+ \skv@prova##2%
+ }{%
+ \let\lastcicada\currentcicada
+ \skv@cicada@lookahead@a\skv@cicada@do##2\skv@cicada@stop
+ }%
+ }%
+ }%
+ }%
+ \def\skv@cicada@lookahead@a##1{%
+ \def\skv@cicada@picknext{##1.}%
+ \futurelet\skv@next\skv@cicada@lookahead@b
+ }%
+ \def\skv@cicada@lookahead@b{%
+ \ifx\skv@next[%
+ \expandafter\skv@cicada@lookahead@c
+ \else
+ \ifx\skv@next(%
+ \expandafter\expandafter\expandafter\skv@cicada@lookahead@d
+ \else
+ \expandafter\expandafter\expandafter\skv@cicada@picknext
+ \fi
+ \fi
+ }%
+ \def\skv@cicada@lookahead@c[##1]{\skv@cicada@picknext[{##1}]}%
+ \def\skv@cicada@lookahead@d(##1){\skv@cicada@picknext({##1})}%
+ \skvbreakloopfalse\lastcicadafalse
+ \skvifxTF\skv@cicada@userlist\@empty{%
+ \ifskvprocessempty\skv@cicada@callback{}\fi
+ }{%
+ \skvexpandnext{\skv@cicada@lookahead@a\skv@cicada@do}%
+ \skv@cicada@userlist#1\skv@cicada@nil#1\skv@cicada@stop
+ }%
+ \skvpopstate\skv@cicada@state\cicadanestdepth
+}
+
+% \cicadiloop[<parser>]{<list>}<\if...>\fi{<ini-code>}{<1.parameter.code>}
+% \cicadiloop*[<parser>]{<listcmd>}<\if...>\fi{<ini-code>}{<1.parameter.code>}
+%
+% It is easy to forget to turn conditional <\if...> off before commencing
+% the loop, especially if it is a boolean. The conditional might have
+% been set true before calling \cicadaloop, and this may invalidate
+% later tests to terminate the loop prematurely. <ini-code> can be used
+% to turn the condtional off before commencing the loop. This forces the
+% user to heed this term.
+%
+\skvrobustdef*\cicadiloop{\skv@teststopt\skv@cicadiloop,}
+\skvrobustdef*\skv@cicadiloop[#1]#2#3\fi#4{%
+ \skvexpandsecond
+ {#4\relax\skv@cicadiloop}{\ifskv@tempst*\fi}%
+ [#1]{#2}#3\fi
+}
+
+% Change the list separator of a given list.
+%
+% \lpschangelistseparator
+% {<original.parser>}{<orig.listcmd>}{<new.parser>}{<new.listcmd>}
+%
+% Example:
+% \def\alist{{a/1,a/2};b;c}
+% \lpschangelistseparator{;}\alist{,}\blist
+%
+\skvrobustdef*\lpschangelistseparator#1#2#3#4{%
+ \def#4{}%
+ \cicadaloop*[#1]{#2}\if01\fi{%
+ \edef#4{%
+ \skvexpandonce#4{\unexpanded{##1}}%
+ \iflastcicada\else#3\fi
+ }%
+ }%
+}
+
+% Declare a list normalizer command for an arbitrary parser.
+%
+% \lpsdeclarelistnormalizer<normalizer.cmd>{<parser>}
+%
+% Example:
+%
+% \lpsdeclarelistnormalizer\lpscommanormalize{,}
+%
+% \lpscommanormalize is defined later.
+%
+\skvrobustdef*\lpsdeclarelistnormalizer#1#2{%
+ \skvifescapedTF{#1}{}{%
+ \skv@err{Token \detokenize{#1} isn't escaped}\skv@ehd
+ }%
+ \def\reserved@a{\lps@declarelistnormalizer{#1}}%
+ \expandafter\reserved@a\expandafter{\string#2}%
+}
+\skvrobustdef*\lps@declarelistnormalizer#1#2{%
+ \begingroup
+ \lccode`\~=`#2 %
+ \lowercase{\endgroup
+ \skvnewdef#1##1{%
+ \unexpanded\expandafter{\romannumeral-`\q
+ \skvcsuse{\skvremovescape#1@activeparser}#2##1#2~\normal@nil}%
+ }%
+ \long\skvcsdef{\skvremovescape#1@activeparser}##1~##2\normal@nil{%
+ \skvifblankTF{##2}
+ {\skvcsuse{\skvremovescape#1@spaceparser}##1 #2\normal@nil}
+ {\skvcsuse{\skvremovescape#1@activeparser}##1#2##2\normal@nil}%
+ }%
+ }%
+ \long\skvcsdef{\skvremovescape#1@spaceparser}##1 #2##2\normal@nil{%
+ \skvifblankTF{##2}
+ {\skvcsuse{\skvremovescape#1@parserspace}##1#2 \normal@nil}
+ {\skvcsuse{\skvremovescape#1@spaceparser}##1#2##2\normal@nil}%
+ }%
+ \long\skvcsdef{\skvremovescape#1@parserspace}##1#2 ##2\normal@nil{%
+ \skvifblankTF{##2}
+ {\skvcsuse{\skvremovescape#1@doubleparser}##1#2#2\normal@nil}
+ {\skvcsuse{\skvremovescape#1@parserspace}##1#2##2\normal@nil}%
+ }%
+ \long\skvcsdef{\skvremovescape#1@doubleparser}##1#2#2##2\normal@nil{%
+ \skvifblankTF{##2}
+ {\skvifblankTF{##1}{}{\expandafter\expandafter\expandafter
+ \space\expandafter\noexpand\@gobble##1}}%
+ {\skvcsuse{\skvremovescape#1@doubleparser}##1#2##2\normal@nil}%
+ }%
+}
+
+\lpsdeclarelistnormalizer\lpscommanormalize{,}
+\lpsdeclarelistnormalizer\lpsslashnormalize{/}
+
+% Declare an expandable csv list parser. No premature stopping of the loop
+% is possible by this scheme. To use this scheme, first do
+%
+% \lpsdeclareexpandablelistparser<processor.cmd><processor.func>{<parser>}
+% \def<processor.func>{<1-parameter callback>}
+%
+% and then call
+%
+% <processor.cmd><list> or <processor.cmd>*<listcmd>
+%
+% <list> or <listcmd> will be normalized before being parsed.
+%
+% Example:
+%
+% \lpsdeclareexpandablelistparser\myloop\do{,}
+%
+% \def\x{a,\if,b}
+% \def\do#1{\unexpanded{{#1}}}
+% \edef\x{\myloop*\x}
+%
+\skvrobustdef*\lpsdeclareexpandablelistparser#1#2#3{%
+ % No need to save the processor.cmd and processor.function in a list.
+ \skvaftercs\lpsdeclarelistnormalizer{\skvremovescape#1@normalizer}{#3}%
+ \begingroup
+ \let\x\skvnoexpandcs
+ \skvexpanded{\endgroup
+ \skvnewdef*\noexpand#1{%
+ \noexpand\skvxifnextchar*%
+ {\x{lps@parse@\skvremovescape#1@a}{\noexpand\@firstoftwo}}
+ {\x{lps@parse@\skvremovescape#1@a}{\noexpand\@secondoftwo}}%
+ }%
+ \def\x{lps@parse@\skvremovescape#1@a}####1####2{%
+ \noexpand\expandafter\x{lps@parse@\skvremovescape#1@b}%
+ \unexpanded{\romannumeral-`\q}####1{%
+ \noexpand\expandafter\x{\skvremovescape#1@normalizer}%
+ \noexpand\expandafter{####2}%
+ }{%
+ \x{\skvremovescape#1@normalizer}{####2}%
+ }%
+ #3\noexpand#1#3%
+ }%
+ \def\x{lps@parse@\skvremovescape#1@b}####1#3{%
+ \noexpand\skvifxTF{\noexpand#1}{####1}%
+ {}{\noexpand#2{####1}\x{lps@parse@\skvremovescape#1@b}}%
+ }%
+ }%
+}
+% Unfortunately, without the following patch, drawing instructions like
+%
+% \draw[blue] (p) \newforeach \p in {1,...,8}{...};
+%
+% will not work, because of the way TikZ hardwires \foreach for this type
+% of task (ie, when \draw precedes \newforeach or \foreachfox). The fact
+% here is that in this case, both \newforeach and \foreachfox can't work
+% but leave everything for \foreach. This can be a problem when \newforeach
+% or \foreachfox is called to avoid a known bug in \foreach, such as at
+%
+% <http://tex.stackexchange.com/questions/79586/foreach-has-a-problem%
+% -with-initially-argument-in-remember-part/79644#79644>
+%
+%
+\skvAtBeginEnvironment{tikzpicture}{%
+ \def\tikz@handle@more{%
+ \ifx\@let@token a\let\@next=\tikz@arcA\else
+ \ifx\@let@token e\let\@next=\tikz@e@char\else
+ \ifx\@let@token g\let\@next=\tikz@g@char\else
+ \ifx\@let@token s\let\@next=\tikz@schar\else
+ \ifx\@let@token |\let\@next=\tikz@vh@lineto\else
+ \ifx\@let@token p\let\@next=\tikz@pchar\pgfsetmovetofirstplotpoint
+ \else\ifx\@let@token t\let\@next=\tikz@to\else
+ \ifx\@let@token\pgfextra\let\@next=\tikz@extra\else
+ \ifx\@let@token\foreach\let\@next=\tikz@foreach\else
+ \ifx\@let@token\newforeach\let\@next=\tikz@foreach\else
+ \ifx\@let@token\pgf@stop\let\@next=\relax\else
+ \ifx\@let@token\par\let\@next=\tikz@scan@next@command\else
+ \ifx\@let@token d\let\@next=\tikz@decoration\else
+ \ifx\@let@token l\let\@next=\tikz@l@char\else
+ \let\@next=\tikz@expand\fi\fi\fi\fi\fi\fi\fi\fi\fi\fi
+ \fi\fi\fi\fi\@next
+ }%
+}
+
+\loops@restorecodes
+\endinput