X-Git-Url: https://scm.cri.ensmp.fr/git/Faustine.git/blobdiff_plain/1059e1cc0c2ecfa237406949aa26155b6a5b9154..66f23d4fabf89ad09adbd4dfc15ac6b5b2b7da83:/interpretor/preprocessor/faust-0.9.47mr3/documentation/faust-quick-reference-src/rail.sty

diff --git a/interpretor/preprocessor/faust-0.9.47mr3/documentation/faust-quick-reference-src/rail.sty b/interpretor/preprocessor/faust-0.9.47mr3/documentation/faust-quick-reference-src/rail.sty
deleted file mode 100644
index 87bde08..0000000
--- a/interpretor/preprocessor/faust-0.9.47mr3/documentation/faust-quick-reference-src/rail.sty
+++ /dev/null
@@ -1,1193 +0,0 @@
-% rail.sty - style file to support railroad diagrams
-%
-% 09-Jul-90 L. Rooijakkers
-% 08-Oct-90 L. Rooijakkers	fixed centering bug when \rail@tmpc<0.
-% 07-Feb-91 L. Rooijakkers	added \railoptions command, indexing
-% 08-Feb-91 L. Rooijakkers	minor fixes
-% 28-Jun-94 K. Barthelmann	turned into LaTeX2e package
-% 08-Dec-96 K. Barthelmann	replaced \@writefile
-% 13-Dec-96 K. Barthelmann	cleanup
-% 22-Feb-98 K. Barthelmann	fixed catcodes of special characters
-% 18-Apr-98 K. Barthelmann	fixed \par handling
-% 19-May-98 J. Olsson		Added new macros to support arrow heads.
-% 26-Jul-98 K. Barthelmann	changed \par to output newlines
-%
-% This style file needs to be used in conjunction with the 'rail'
-% program. Running LaTeX as 'latex file' produces file.rai, which should be
-% processed by Rail with 'rail file'. This produces file.rao, which will
-% be picked up by LaTeX on the next 'latex file' run.
-%
-% LaTeX will warn if there is no file.rao or it's out of date.
-%
-% The macros in this file thus consist of two parts: those that read and
-% write the .rai and .rao files, and those that do the actual formatting
-% of the railroad diagrams.
-
-\NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{rail}[1998/05/19]
-
-% railroad diagram formatting parameters (user level)
-% all of these are copied into their internal versions by \railinit
-%
-% \railunit : \unitlength within railroad diagrams
-% \railextra : extra length at outside of diagram
-% \railboxheight : height of ovals and frames
-% \railboxskip : vertical space between lines
-% \railboxleft : space to the left of a box
-% \railboxright : space to the right of a box
-% \railovalspace : extra space around contents of oval
-% \railframespace : extra space around contents of frame
-% \railtextleft : space to the left of text
-% \railtextright : space to the right of text
-% \railtextup : space to lift text up
-% \railjoinsize : circle size of join/split arcs
-% \railjoinadjust : space to adjust join
-%
-% \railnamesep : separator between name and rule body
-
-\newlength\railunit
-\newlength\railextra
-\newlength\railboxheight
-\newlength\railboxskip
-\newlength\railboxleft
-\newlength\railboxright
-\newlength\railovalspace
-\newlength\railframespace
-\newlength\railtextleft
-\newlength\railtextright
-\newlength\railtextup
-\newlength\railjoinsize
-\newlength\railjoinadjust
-\newlength\railnamesep
-
-% initialize the parameters
-
-\setlength\railunit{1sp}
-\setlength\railextra{4ex}
-\setlength\railboxleft{1ex}
-\setlength\railboxright{1ex}
-\setlength\railovalspace{2ex}
-\setlength\railframespace{2ex}
-\setlength\railtextleft{1ex}
-\setlength\railtextright{1ex}
-\setlength\railjoinadjust{0pt}
-\setlength\railnamesep{1ex}
-
-\DeclareOption{10pt}{
-  \setlength\railboxheight{16pt}
-  \setlength\railboxskip{24pt}
-  \setlength\railtextup{5pt}
-  \setlength\railjoinsize{16pt}
-}
-\DeclareOption{11pt}{
-  \setlength\railboxheight{16pt}
-  \setlength\railboxskip{24pt}
-  \setlength\railtextup{5pt}
-  \setlength\railjoinsize{16pt}
-}
-\DeclareOption{12pt}{
-  \setlength\railboxheight{20pt}
-  \setlength\railboxskip{28pt}
-  \setlength\railtextup{6pt}
-  \setlength\railjoinsize{20pt}
-}
-
-\ExecuteOptions{10pt}
-\ProcessOptions
-
-% internal versions of the formatting parameters
-%
-% \rail@extra   : \railextra
-% \rail@boxht   : \railboxheight
-% \rail@boxsp   : \railboxskip
-% \rail@boxlf   : \railboxleft
-% \rail@boxrt   : \railboxright
-% \rail@boxhht  : \railboxheight / 2
-% \rail@ovalsp  : \railovalspace
-% \rail@framesp : \railframespace
-% \rail@textlf  : \railtextleft
-% \rail@textrt  : \railtextright
-% \rail@textup  : \railtextup
-% \rail@joinsz  : \railjoinsize
-% \rail@joinhsz : \railjoinsize / 2
-% \rail@joinadj : \railjoinadjust
-%
-% \railinit : internalize all of the parameters.
-
-\newcount\rail@extra
-\newcount\rail@boxht
-\newcount\rail@boxsp
-\newcount\rail@boxlf
-\newcount\rail@boxrt
-\newcount\rail@boxhht
-\newcount\rail@ovalsp
-\newcount\rail@framesp
-\newcount\rail@textlf
-\newcount\rail@textrt
-\newcount\rail@textup
-\newcount\rail@joinsz
-\newcount\rail@joinhsz
-\newcount\rail@joinadj
-
-\newcommand\railinit{
-\rail@extra=\railextra
-\divide\rail@extra by \railunit
-\rail@boxht=\railboxheight
-\divide\rail@boxht by \railunit
-\rail@boxsp=\railboxskip
-\divide\rail@boxsp by \railunit
-\rail@boxlf=\railboxleft
-\divide\rail@boxlf by \railunit
-\rail@boxrt=\railboxright
-\divide\rail@boxrt by \railunit
-\rail@boxhht=\railboxheight
-\divide\rail@boxhht by \railunit
-\divide\rail@boxhht by 2
-\rail@ovalsp=\railovalspace
-\divide\rail@ovalsp by \railunit
-\rail@framesp=\railframespace
-\divide\rail@framesp by \railunit
-\rail@textlf=\railtextleft
-\divide\rail@textlf by \railunit
-\rail@textrt=\railtextright
-\divide\rail@textrt by \railunit
-\rail@textup=\railtextup
-\divide\rail@textup by \railunit
-\rail@joinsz=\railjoinsize
-\divide\rail@joinsz by \railunit
-\rail@joinhsz=\railjoinsize
-\divide\rail@joinhsz by \railunit
-\divide\rail@joinhsz by 2
-\rail@joinadj=\railjoinadjust
-\divide\rail@joinadj by \railunit
-}
-
-\AtBeginDocument{\railinit}
-
-% \rail@param : declarations for list environment
-%
-% \railparam{TEXT} : sets \rail@param to TEXT
-%
-% \rail@reserved : characters reserved for grammar
-
-\newcommand\railparam[1]{
-\def\rail@param{
-  \setlength\leftmargin{0pt}\setlength\rightmargin{0pt}
-  \setlength\labelwidth{0pt}\setlength\labelsep{0pt}
-  \setlength\itemindent{0pt}\setlength\listparindent{0pt}
-  #1
-}
-}
-\railparam{}
-
-\newtoks\rail@reserved
-\rail@reserved={:;|*+?[]()'"}
-
-% \rail@termfont : format setup for terminals
-%
-% \rail@nontfont : format setup for nonterminals
-%
-% \rail@annofont : format setup for annotations
-%
-% \rail@rulefont : format setup for rule names
-%
-% \rail@indexfont : format setup for index entry
-%
-% \railtermfont{TEXT} : set terminal format setup to TEXT
-%
-% \railnontermfont{TEXT} : set nonterminal format setup to TEXT
-%
-% \railannotatefont{TEXT} : set annotation format setup to TEXT
-%
-% \railnamefont{TEXT} : set rule name format setup to TEXT
-%
-% \railindexfont{TEXT} : set index entry format setup to TEXT
-
-\def\rail@termfont{\ttfamily\upshape}
-\def\rail@nontfont{\rmfamily\upshape}
-\def\rail@annofont{\rmfamily\itshape}
-\def\rail@namefont{\rmfamily\itshape}
-\def\rail@indexfont{\rmfamily\itshape}
-
-\newcommand\railtermfont[1]{
-\def\rail@termfont{#1}
-}
-
-\newcommand\railnontermfont[1]{
-\def\rail@nontfont{#1}
-}
-
-\newcommand\railannotatefont[1]{
-\def\rail@annofont{#1}
-}
-
-\newcommand\railnamefont[1]{
-\def\rail@namefont{#1}
-}
-
-\newcommand\railindexfont[1]{
-\def\rail@indexfont{#1}
-}
-
-% railroad read/write macros
-%
-% \begin{rail} TEXT \end{rail} : TEXT is written out to the .rai file,
-%                                as \rail@i{NR}{TEXT}. Then the matching
-%                                \rail@o{NR}{FMT} from the .rao file is
-%                                executed (if defined).
-%
-% \railoptions{OPTIONS} : OPTIONS are written out to the .rai file,
-%                         as \rail@p{OPTIONS}.
-%
-% \railterm{IDENT,IDENT,...} : format IDENT as terminals. writes out
-%                              \rail@t{IDENT} to the .rai file
-%
-% \railalias{IDENT}{TEXT} : format IDENT as TEXT. defines \rail@t@IDENT as
-%                           TEXT.
-%
-% \railtoken{IDENT}{TEXT} : abbreviates \railalias{IDENT}{TEXT}\railterm{IDENT}
-%                           (for backward compatibility)
-%
-% \rail@setcodes : guards special characters
-%
-% \rail@makeother{CHARACTER} : sets \catcode of CHARACTER to "other"
-%                              used inside a loop for \rail@setcodes
-%
-% \rail@nr : railroad diagram counter
-%
-% \ifrail@match : current \rail@i{NR}{TEXT} matches
-%
-% \rail@first : actions to be done first. read in .rao file,
-%               open .rai file if \@filesw true, undefine \rail@first.
-%               executed from \begin{rail}, \railoptions and \railterm.
-%
-% \rail@i{NR}{TEXT} : defines \rail@i@NR as TEXT. written to the .rai
-%                     file by \rail, read from the .rao file by
-%                     \rail@first
-%
-% \rail@t{IDENT} : tells Rail that IDENT is to be custom formatted,
-%                  written to the .rai file by \railterm.
-%
-% \rail@o{NR}{TEXT} : defines \rail@o@NR as TEXT, read from the .rao
-%                     file by \rail@first.
-%
-% \rail@p{OPTIONS} : pass options to rail, written to the .rai file by
-%                    \railoptions
-%
-% \rail@write{TEXT} : write TEXT to the .rai file
-%
-% \rail@warn : warn user for mismatching diagrams
-%
-% \rail@endwarn : either \relax or \rail@warn
-%
-% \ifrail@all : checked at the end of the document
-
-\def\rail@makeother#1{
-  \expandafter\catcode\expandafter`\csname\string #1\endcsname=12
-}
-
-\def\rail@setcodes{
-\let\par=\relax
-\let\\=\relax
-\expandafter\@tfor\expandafter\rail@symbol\expandafter:\expandafter=%
-  \the\rail@reserved
-\do{\expandafter\rail@makeother\rail@symbol}
-}
-
-\newcount\rail@nr
-
-\newif\ifrail@all
-\rail@alltrue
-
-\newif\ifrail@match
-
-\def\rail@first{
-\begingroup
-\makeatletter
-\rail@setcodes
-\InputIfFileExists{\jobname.rao}{}{\PackageInfo{rail}{No file \jobname.rao}}
-\makeatother
-\endgroup
-\if@filesw
-\newwrite\tf@rai
-\immediate\openout\tf@rai=\jobname.rai
-\fi
-\global\let\rail@first=\relax
-}
-
-\long\def\rail@body#1\end{
-{
-\newlinechar=`^^J
-\def\par{\string\par^^J}
-\rail@write{\string\rail@i{\number\rail@nr}{#1}}
-}
-\xdef\rail@i@{#1}
-\end
-}
-
-\newenvironment{rail}{
-\global\advance\rail@nr by 1
-\rail@first
-\begingroup
-\rail@setcodes
-\rail@body
-}{
-\endgroup
-\rail@matchtrue
-\@ifundefined{rail@o@\number\rail@nr}{\rail@matchfalse}{}
-\expandafter\ifx\csname rail@i@\number\rail@nr\endcsname\rail@i@
-\else
-\rail@matchfalse
-\fi
-\ifrail@match
-\csname rail@o@\number\rail@nr\endcsname
-\else
-\PackageWarning{rail}{Railroad diagram {\number\rail@nr} doesn't match}
-\global\let\rail@endwarn=\rail@warn
-\begin{list}{}{\rail@param}
-\rail@begin{1}{}
-\rail@setbox{\bfseries ???}
-\rail@oval
-\rail@end
-\end{list}
-\fi
-}
-
-\newcommand\railoptions[1]{
-\rail@first
-\rail@write{\string\rail@p{#1}}
-}
-
-\newcommand\railterm[1]{
-\rail@first
-\@for\rail@@:=#1\do{
-\rail@write{\string\rail@t{\rail@@}}
-}
-}
-
-\newcommand\railalias[2]{
-\expandafter\def\csname rail@t@#1\endcsname{#2}
-}
-
-\newcommand\railtoken[2]{\railalias{#1}{#2}\railterm{#1}}
-
-\long\def\rail@i#1#2{
-\expandafter\gdef\csname rail@i@#1\endcsname{#2}
-}
-
-\def\rail@o#1#2{
-\expandafter\gdef\csname rail@o@#1\endcsname{
-\begin{list}{}{\rail@param}
-#2
-\end{list}
-}
-}
-
-\def\rail@t#1{}
-
-\def\rail@p#1{}
-
-\long\def\rail@write#1{\@ifundefined{tf@rai}{}{\immediate\write\tf@rai{#1}}}
-
-\def\rail@warn{
-\PackageWarningNoLine{rail}{Railroad diagram(s) may have changed.
-                            Use 'rail' and rerun}
-}
-
-\let\rail@endwarn=\relax
-
-\AtEndDocument{\rail@endwarn}
-
-% index entry macro
-%
-% \rail@index{IDENT} : add index entry for IDENT
-
-\def\rail@index#1{
-\index{\rail@indexfont#1}
-}
-
-% railroad formatting primitives
-%
-% \rail@x : current x
-% \rail@y : current y
-% \rail@ex : current end x
-% \rail@sx : starting x for \rail@cr
-% \rail@rx : rightmost previous x for \rail@cr
-%
-% \rail@tmpa : temporary count
-% \rail@tmpb : temporary count
-% \rail@tmpc : temporary count
-%
-% \rail@put : put at (\rail@x,\rail@y)
-% \rail@vput : put vector at (\rail@x,\rail@y)
-%
-% \rail@eline : end line by drawing from \rail@ex to \rail@x
-%
-% \rail@vreline : end line by drawing a vector from \rail@x to \rail@ex
-%
-% \rail@vleline : end line by drawing a vector from \rail@ex to \rail@x
-%
-% \rail@sety{LEVEL} : set \rail@y to level LEVEL
-
-\newcount\rail@x
-\newcount\rail@y
-\newcount\rail@ex
-\newcount\rail@sx
-\newcount\rail@rx
-
-\newcount\rail@tmpa
-\newcount\rail@tmpb
-\newcount\rail@tmpc
-
-\def\rail@put{\put(\number\rail@x,\number\rail@y)}
-
-\def\rail@vput{\put(\number\rail@ex,\number\rail@y)}
-
-\def\rail@eline{
-\rail@tmpb=\rail@x
-\advance\rail@tmpb by -\rail@ex
-\rail@put{\line(-1,0){\number\rail@tmpb}}
-}
-
-\def\rail@vreline{
-\rail@tmpb=\rail@x
-\advance\rail@tmpb by -\rail@ex
-\rail@vput{\vector(1,0){\number\rail@tmpb}}
-}
-
-\def\rail@vleline{
-\rail@tmpb=\rail@x
-\advance\rail@tmpb by -\rail@ex
-\rail@put{\vector(-1,0){\number\rail@tmpb}}
-}
-
-\def\rail@sety#1{
-\rail@y=#1
-\multiply\rail@y by -\rail@boxsp
-\advance\rail@y by -\rail@boxht
-}
-
-% \rail@begin{HEIGHT}{NAME} : begin a railroad diagram of height HEIGHT
-%
-% \rail@end : end a railroad diagram
-%
-% \rail@expand{IDENT} : expand IDENT
-
-\def\rail@begin#1#2{
-\item
-\begin{minipage}[t]{\linewidth}
-\ifx\@empty#2\else
-{\rail@namefont \rail@expand{#2}}\\*[\railnamesep]
-\fi
-\unitlength=\railunit
-\rail@tmpa=#1
-\multiply\rail@tmpa by \rail@boxsp
-\begin{picture}(0,\number\rail@tmpa)(0,-\number\rail@tmpa)
-\rail@ex=0
-\rail@rx=0
-\rail@x=\rail@extra
-\rail@sx=\rail@x
-\rail@sety{0}
-}
-
-\def\rail@end{
-\advance\rail@x by \rail@extra
-\rail@eline
-\end{picture}
-\end{minipage}
-}
-
-\def\rail@vend{
-\advance\rail@x by \rail@extra
-\rail@vreline
-\end{picture}
-\end{minipage}
-}
-
-\def\rail@expand#1{\@ifundefined{rail@t@#1}{#1}{\csname rail@t@#1\endcsname}}
-
-% \rail@token{TEXT}[ANNOT] : format token TEXT with annotation
-% \rail@ltoken{TEXT}[ANNOT] : format token TEXT with annotation, arrow left
-% \rail@rtoken{TEXT}[ANNOT] : format token TEXT with annotation, arrow right
-%
-% \rail@ctoken{TEXT}[ANNOT] : format token TEXT centered with annotation
-% \rail@lctoken{TEXT}[ANNOT] : format token TEXT centered with annotation, arrow left
-% \rail@rctoken{TEXT}[ANNOT] : format token TEXT centered with annotation, arrow right
-%
-% \rail@nont{TEXT}[ANNOT] : format nonterminal TEXT with annotation
-% \rail@lnont{TEXT}[ANNOT] : format nonterminal TEXT with annotation, arrow left
-% \rail@rnont{TEXT}[ANNOT] : format nonterminal TEXT with annotation. arrow right
-%
-% \rail@cnont{TEXT}[ANNOT] : format nonterminal TEXT centered with annotation
-% \rail@lcnont{TEXT}[ANNOT] : format nonterminal TEXT centered with annotation,
-%                             arrow left
-% \rail@rcnont{TEXT}[ANNOT] : format nonterminal TEXT centered with annotation,
-%                             arrow right
-%
-% \rail@term{TEXT}[ANNOT] : format terminal TEXT with annotation
-% \rail@lterm{TEXT}[ANNOT] : format terminal TEXT with annotation, arrow left
-% \rail@rterm{TEXT}[ANNOT] : format terminal TEXT with annotation, arrow right
-%
-% \rail@cterm{TEXT}[ANNOT] : format terminal TEXT centered with annotation
-% \rail@lcterm{TEXT}[ANNOT] : format terminal TEXT centered with annotation, arrow left
-% \rail@rcterm{TEXT}[ANNOT] : format terminal TEXT centered with annotation,
-%                             arrow right
-%
-% \rail@annote[TEXT] : format TEXT as annotation
-
-\def\rail@token#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@oval
-}
-
-\def\rail@ltoken#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vloval
-}
-
-\def\rail@rtoken#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vroval
-}
-
-\def\rail@ctoken#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@coval
-}
-
-\def\rail@lctoken#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vlcoval
-}
-
-\def\rail@rctoken#1[#2]{
-\rail@setbox{%
-{\rail@termfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vrcoval
-}
-
-\def\rail@nont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@frame
-}
-
-\def\rail@lnont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vlframe
-}
-
-\def\rail@rnont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vrframe
-}
-
-\def\rail@cnont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@cframe
-}
-
-\def\rail@lcnont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vlcframe
-}
-
-\def\rail@rcnont#1[#2]{
-\rail@setbox{%
-{\rail@nontfont \rail@expand{#1}}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vrcframe
-}
-
-\def\rail@term#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@oval
-}
-
-\def\rail@lterm#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vloval
-}
-
-\def\rail@rterm#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vroval
-}
-
-\def\rail@cterm#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@coval
-}
-
-\def\rail@lcterm#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vlcoval
-}
-
-\def\rail@rcterm#1[#2]{
-\rail@setbox{%
-{\rail@termfont #1}\ifx\@empty#2\else\ {\rail@annofont #2}\fi
-}
-\rail@vrcoval
-}
-
-\def\rail@annote[#1]{
-\rail@setbox{\rail@annofont #1}
-\rail@text
-}
-
-% \rail@box : temporary box for \rail@oval and \rail@frame
-%
-% \rail@setbox{TEXT} : set \rail@box to TEXT, set \rail@tmpa to width
-%
-% \rail@oval : format \rail@box of width \rail@tmpa inside an oval
-% \rail@vloval : format \rail@box of width \rail@tmpa inside an oval, vector left
-% \rail@vroval : format \rail@box of width \rail@tmpa inside an oval, vector right
-%
-% \rail@coval : same as \rail@oval, but centered between \rail@x and
-%               \rail@mx
-% \rail@vlcoval : same as \rail@oval, but centered between \rail@x and
-%                 \rail@mx, vector left
-% \rail@vrcoval : same as \rail@oval, but centered between \rail@x and
-%                 \rail@mx, vector right
-%
-% \rail@frame : format \rail@box of width \rail@tmpa inside a frame
-% \rail@vlframe : format \rail@box of width \rail@tmpa inside a frame, vector left
-% \rail@vrframe : format \rail@box of width \rail@tmpa inside a frame, vector right
-%
-% \rail@cframe : same as \rail@frame, but centered between \rail@x and
-%                \rail@mx
-% \rail@vlcframe : same as \rail@frame, but centered between \rail@x and
-%                  \rail@mx, vector left
-% \rail@vrcframe : same as \rail@frame, but centered between \rail@x and
-%                  \rail@mx, vector right
-%
-% \rail@text : format \rail@box of width \rail@tmpa above the line
-
-\newbox\rail@box
-
-\def\rail@setbox#1{
-\setbox\rail@box\hbox{\strut#1}
-\rail@tmpa=\wd\rail@box
-\divide\rail@tmpa by \railunit
-}
-
-\def\rail@oval{
-\advance\rail@x by \rail@boxlf
-\rail@eline
-\advance\rail@tmpa by \rail@ovalsp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\rail@tmpb=\rail@tmpa
-\divide\rail@tmpb by 2
-\advance\rail@y by -\rail@boxhht
-\rail@put{\makebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpb
-\rail@put{\oval(\number\rail@tmpa,\number\rail@boxht)}
-\advance\rail@x by \rail@tmpb
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-}
-
-\def\rail@vloval{
-\advance\rail@x by \rail@boxlf
-\rail@eline
-\advance\rail@tmpa by \rail@ovalsp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\rail@tmpb=\rail@tmpa
-\divide\rail@tmpb by 2
-\advance\rail@y by -\rail@boxhht
-\rail@put{\makebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpb
-\rail@put{\oval(\number\rail@tmpa,\number\rail@boxht)}
-\advance\rail@x by \rail@tmpb
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-\rail@vleline
-}
-
-\def\rail@vroval{
-\advance\rail@x by \rail@boxlf
-\rail@vreline
-\advance\rail@tmpa by \rail@ovalsp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\rail@tmpb=\rail@tmpa
-\divide\rail@tmpb by 2
-\advance\rail@y by -\rail@boxhht
-\rail@put{\makebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpb
-\rail@put{\oval(\number\rail@tmpa,\number\rail@boxht)}
-\advance\rail@x by \rail@tmpb
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-}
-
-\def\rail@coval{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@ovalsp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@oval
-}
-
-\def\rail@vlcoval{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@ovalsp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@vloval
-}
-
-\def\rail@vrcoval{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@ovalsp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@vroval
-}
-
-\def\rail@frame{
-\advance\rail@x by \rail@boxlf
-\rail@eline
-\advance\rail@tmpa by \rail@framesp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\advance\rail@y by -\rail@boxhht
-\rail@put{\framebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpa
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-}
-
-\def\rail@vlframe{
-\advance\rail@x by \rail@boxlf
-\rail@eline
-\advance\rail@tmpa by \rail@framesp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\advance\rail@y by -\rail@boxhht
-\rail@put{\framebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpa
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-\rail@vleline
-}
-
-\def\rail@vrframe{
-\advance\rail@x by \rail@boxlf
-\rail@vreline
-\advance\rail@tmpa by \rail@framesp
-\ifnum\rail@tmpa<\rail@boxht\rail@tmpa=\rail@boxht\fi
-\advance\rail@y by -\rail@boxhht
-\rail@put{\framebox(\number\rail@tmpa,\number\rail@boxht){\box\rail@box}}
-\advance\rail@y by \rail@boxhht
-\advance\rail@x by \rail@tmpa
-\rail@ex=\rail@x
-\advance\rail@x by \rail@boxrt
-}
-
-\def\rail@cframe{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@framesp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@frame
-}
-
-\def\rail@vlcframe{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@framesp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@vlframe
-}
-
-\def\rail@vrcframe{
-\rail@tmpb=\rail@tmpa
-\advance\rail@tmpb by \rail@framesp
-\ifnum\rail@tmpb<\rail@boxht\rail@tmpb=\rail@boxht\fi
-\advance\rail@tmpb by \rail@boxlf
-\advance\rail@tmpb by \rail@boxrt
-\rail@tmpc=\rail@mx
-\advance\rail@tmpc by -\rail@x
-\advance\rail@tmpc by -\rail@tmpb
-\divide\rail@tmpc by 2
-\ifnum\rail@tmpc>0
-\advance\rail@x by \rail@tmpc
-\fi
-\rail@vrframe
-}
-
-\def\rail@text{
-\advance\rail@x by \rail@textlf
-\advance\rail@y by \rail@textup
-\rail@put{\box\rail@box}
-\advance\rail@y by -\rail@textup
-\advance\rail@x by \rail@tmpa
-\advance\rail@x by \rail@textrt
-}
-
-% alternatives
-%
-% \rail@jx \rail@jy : current join point
-%
-% \rail@gx \rail@gy \rail@gex \rail@grx : global versions of \rail@x etc,
-%                                         to pass values over group closings
-%
-% \rail@mx : maximum x so far
-%
-% \rail@sy : starting \rail@y for alternatives
-%
-% \rail@jput : put at (\rail@jx,\rail@jy)
-%
-% \rail@joval[PART] : put \oval[PART] with adjust
-
-\newcount\rail@jx
-\newcount\rail@jy
-
-\newcount\rail@gx
-\newcount\rail@gy
-\newcount\rail@gex
-\newcount\rail@grx
-
-\newcount\rail@sy
-\newcount\rail@mx
-
-\def\rail@jput{
-\put(\number\rail@jx,\number\rail@jy)
-}
-
-\def\rail@joval[#1]{
-\advance\rail@jx by \rail@joinadj
-\rail@jput{\oval(\number\rail@joinsz,\number\rail@joinsz)[#1]}
-\advance\rail@jx by -\rail@joinadj
-}
-
-% \rail@barsplit : incoming split for '|'
-%
-% \rail@plussplit : incoming split for '+'
-%
-
-\def\rail@barsplit{
-\advance\rail@jy by -\rail@joinhsz
-\rail@joval[tr]
-\advance\rail@jx by \rail@joinhsz
-}
-
-\def\rail@plussplit{
-\advance\rail@jy by -\rail@joinhsz
-\advance\rail@jx by \rail@joinsz
-\rail@joval[tl]
-\advance\rail@jx by -\rail@joinhsz
-}
-
-% \rail@alt{SPLIT} : start alternatives with incoming split SPLIT
-%
-
-\def\rail@alt#1{
-\rail@sy=\rail@y
-\rail@jx=\rail@x
-\rail@jy=\rail@y
-\advance\rail@x by \rail@joinsz
-\rail@mx=0
-\let\rail@list=\@empty
-\let\rail@comma=\@empty
-\let\rail@split=#1
-\begingroup
-\rail@sx=\rail@x
-\rail@rx=0
-}
-
-% \rail@nextalt{FIX}{Y} : start next alternative at vertical position Y
-%                         and fix-up FIX
-%
-
-\def\rail@nextalt#1#2{
-\global\rail@gx=\rail@x
-\global\rail@gy=\rail@y
-\global\rail@gex=\rail@ex
-\global\rail@grx=\rail@rx
-\endgroup
-#1
-\ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi
-\ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi
-\edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy}
-\def\rail@comma{,}
-\rail@split
-\let\rail@split=\@empty
-\rail@sety{#2}
-\rail@tmpa=\rail@jy
-\advance\rail@tmpa by -\rail@y
-\advance\rail@tmpa by -\rail@joinhsz
-\rail@jput{\line(0,-1){\number\rail@tmpa}}
-\rail@jy=\rail@y
-\advance\rail@jy by \rail@joinhsz
-\advance\rail@jx by \rail@joinhsz
-\rail@joval[bl]
-\advance\rail@jx by -\rail@joinhsz
-\rail@ex=\rail@x
-\begingroup
-\rail@sx=\rail@x
-\rail@rx=0
-}
-
-% \rail@barjoin : outgoing join for first '|' alternative
-%
-% \rail@plusjoin : outgoing join for first '+' alternative
-%
-% \rail@altjoin : join for subsequent alternative
-%
-
-\def\rail@barjoin{
-\ifnum\rail@y<\rail@sy
-\global\rail@gex=\rail@jx
-\else
-\global\rail@gex=\rail@ex
-\fi
-\advance\rail@jy by -\rail@joinhsz
-\rail@joval[tl]
-\advance\rail@jx by -\rail@joinhsz
-\ifnum\rail@y<\rail@sy
-\rail@altjoin
-\fi
-}
-
-\def\rail@plusjoin{
-\global\rail@gex=\rail@ex
-\advance\rail@jy by -\rail@joinhsz
-\advance\rail@jx by -\rail@joinsz
-\rail@joval[tr]
-\advance\rail@jx by \rail@joinhsz
-}
-
-\def\rail@altjoin{
-\rail@eline
-\rail@tmpa=\rail@jy
-\advance\rail@tmpa by -\rail@y
-\advance\rail@tmpa by -\rail@joinhsz
-\rail@jput{\line(0,-1){\number\rail@tmpa}}
-\rail@jy=\rail@y
-\advance\rail@jy by \rail@joinhsz
-\advance\rail@jx by -\rail@joinhsz
-\rail@joval[br]
-\advance\rail@jx by \rail@joinhsz
-}
-
-% \rail@eltsplit EX:Y; : split EX:Y into \rail@ex \rail@y
-%
-% \rail@endalt{JOIN} : end alternatives with outgoing join JOIN
-
-\def\rail@eltsplit#1:#2;{\rail@ex=#1\rail@y=#2}
-
-\def\rail@endalt#1{
-\global\rail@gx=\rail@x
-\global\rail@gy=\rail@y
-\global\rail@gex=\rail@ex
-\global\rail@grx=\rail@rx
-\endgroup
-\ifnum\rail@gx>\rail@mx\rail@mx=\rail@gx\fi
-\ifnum\rail@grx>\rail@mx\rail@mx=\rail@grx\fi
-\edef\rail@list{\rail@list\rail@comma\number\rail@gex:\number\rail@gy}
-\rail@x=\rail@mx
-\rail@jx=\rail@x
-\rail@jy=\rail@sy
-\advance\rail@jx by \rail@joinsz
-\let\rail@join=#1
-\@for\rail@elt:=\rail@list\do{
-\expandafter\rail@eltsplit\rail@elt;
-\rail@join
-\let\rail@join=\rail@altjoin
-}
-\rail@x=\rail@mx
-\rail@y=\rail@sy
-\rail@ex=\rail@gex
-\advance\rail@x by \rail@joinsz
-}
-
-% \rail@bar : start '|' alternatives
-%
-% \rail@nextbar : next '|' alternative
-%
-% \rail@endbar : end '|' alternatives
-%
-
-\def\rail@bar{
-\rail@alt\rail@barsplit
-}
-
-\def\rail@nextbar{
-\rail@nextalt\relax
-}
-
-\def\rail@endbar{
-\rail@endalt\rail@barjoin
-}
-
-% \rail@plus : start '+' alternatives
-%
-% \rail@nextplus: next '+' alternative
-%
-% \rail@endplus : end '+' alternatives
-%
-
-\def\rail@plus{
-\rail@alt\rail@plussplit
-}
-
-\def\rail@nextplus{
-\rail@nextalt\rail@fixplus
-}
-
-\def\rail@fixplus{
-\ifnum\rail@gy<\rail@sy
-\begingroup
-\rail@x=\rail@gx
-\rail@y=\rail@gy
-\rail@ex=\rail@gex
-\rail@rx=\rail@grx
-\ifnum\rail@x<\rail@rx
-\rail@x=\rail@rx
-\fi
-\rail@eline
-\rail@jx=\rail@x
-\rail@jy=\rail@y
-\advance\rail@jy by \rail@joinhsz
-\rail@joval[br]
-\advance\rail@jx by \rail@joinhsz
-\rail@tmpa=\rail@sy
-\advance\rail@tmpa by -\rail@joinhsz
-\advance\rail@tmpa by -\rail@jy
-\rail@jput{\line(0,1){\number\rail@tmpa}}
-\rail@jy=\rail@sy
-\advance\rail@jy by -\rail@joinhsz
-\advance\rail@jx by \rail@joinhsz
-\rail@joval[tl]
-\advance\rail@jy by \rail@joinhsz
-\global\rail@gx=\rail@jx
-\global\rail@gy=\rail@jy
-\global\rail@gex=\rail@gx
-\global\rail@grx=\rail@rx
-\endgroup
-\fi
-}
-
-\def\rail@endplus{
-\rail@endalt\rail@plusjoin
-}
-
-% \rail@cr{Y} : carriage return to vertical position Y
-
-\def\rail@cr#1{
-\rail@tmpa=\rail@sx
-\advance\rail@tmpa by \rail@joinsz
-\ifnum\rail@x<\rail@tmpa\rail@x=\rail@tmpa\fi
-\rail@eline
-\rail@jx=\rail@x
-\rail@jy=\rail@y
-\advance\rail@x by \rail@joinsz
-\ifnum\rail@x>\rail@rx\rail@rx=\rail@x\fi
-\advance\rail@jy by -\rail@joinhsz
-\rail@joval[tr]
-\advance\rail@jx by \rail@joinhsz
-\rail@sety{#1}
-\rail@tmpa=\rail@jy
-\advance\rail@tmpa by -\rail@y
-\advance\rail@tmpa by -\rail@boxsp
-\advance\rail@tmpa by -\rail@joinhsz
-\rail@jput{\line(0,-1){\number\rail@tmpa}}
-\rail@jy=\rail@y
-\advance\rail@jy by \rail@boxsp
-\advance\rail@jy by \rail@joinhsz
-\advance\rail@jx by -\rail@joinhsz
-\rail@joval[br]
-\advance\rail@jy by -\rail@joinhsz
-\rail@tmpa=\rail@jx
-\advance\rail@tmpa by -\rail@sx
-\advance\rail@tmpa by -\rail@joinhsz
-\rail@jput{\line(-1,0){\number\rail@tmpa}}
-\rail@jx=\rail@sx
-\advance\rail@jx by \rail@joinhsz
-\advance\rail@jy by -\rail@joinhsz
-\rail@joval[tl]
-\advance\rail@jx by -\rail@joinhsz
-\rail@tmpa=\rail@boxsp
-\advance\rail@tmpa by -\rail@joinsz
-\rail@jput{\line(0,-1){\number\rail@tmpa}}
-\advance\rail@jy by -\rail@tmpa
-\advance\rail@jx by \rail@joinhsz
-\rail@joval[bl]
-\rail@x=\rail@jx
-\rail@ex=\rail@x
-}
