2

I try to define a new environment whose macro code contains the dot2tex environment from the dot2texi package (look at the appended MWE). Unfortunately the compilation ends with the following error

Opening dot2tex stream compiled/doc-dot2tex-fig1.dot)
Runaway argument?
! File ended while scanning use of \next.
<inserted text> 
            \par 
<*> doc.tex

I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Emergency stop.
<*> doc.tex

*** (job aborted, no legal \end found)

The complete log-file is further below.

At this point i don't even know where to look at to resolve it.


MWE

\documentclass{article}
\usepackage{dot2texi}
\usepackage{tikz}
\usepackage{environ}
\NewEnviron{map}{%
\begin{dot2tex}[dot]
digraph {
\BODY
}
\end{dot2tex}
}
\usetikzlibrary{shapes,arrows}
\begin{document}
\begin{map}
A -> B -> C -> {C1 C2};
\end{map}
\end{document}

Log-File

This is pdfTeX, Version 3.1415926-2.5-1.40.14 (TeX Live 2013/Debian) (format=pdflatex 2014.4.10)  12 APR 2014 15:49
entering extended mode
 \write18 enabled.
 file:line:error style messages enabled.
 %&-line parsing enabled.
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File: tikzlibraryarrows.code.tex 2008/01/09 v3.0.0 (rcs-revision 1.1)

(/home/johannes/texmf/tex/generic/pgf/tex/generic/pgf/libraries/pgflibraryarrow
s.code.tex
File: pgflibraryarrows.code.tex 2013/09/23 v3.0.0 (rcs-revision 1.16)
\arrowsize=\dimen151
)) (./compiled/doc.aux)
\openout1 = `compiled/doc.aux'.

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\scratchbox=\box57
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\MPscratchDim=\dimen153
\MPnumerator=\count116
\makeMPintoPDFobject=\count117
\everyMPtoPDFconversion=\toks32
) (/usr/share/texlive/texmf-dist/tex/generic/oberdiek/pdftexcmds.sty
Package: pdftexcmds 2011/11/29 v0.20 Utility functions of pdfTeX for LuaTeX (HO
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\openout3 = `compiled/doc-dot2tex-fig1.dot'.


Opening dot2tex stream compiled/doc-dot2tex-fig1.dot)
Runaway argument?
! File ended while scanning use of \next.
<inserted text> 
                \par 
<*> doc.tex

I suspect you have forgotten a `}', causing me
to read past where you wanted me to stop.
I'll try to recover; but if the error is serious,
you'd better type `E' or `X' now and fix your file.

! Emergency stop.
<*> doc.tex

*** (job aborted, no legal \end found)


Here is how much of TeX's memory you used:
 14037 strings out of 494976
 305884 string characters out of 6179137
 355279 words of memory out of 5000000
 17004 multiletter control sequences out of 15000+600000
 3640 words of font info for 14 fonts, out of 8000000 for 9000
 14 hyphenation exceptions out of 8191
 55i,0n,67p,404b,116s stack positions out of 5000i,500n,10000p,200000b,80000s
!  ==> Fatal error occurred, no output PDF file produced!
  • The dot2tex environment is like verbatim, so it can't go in the argument to another command. – egreg Apr 12 '14 at 14:32
1

We can find some workarounds.

Solution A: We could generate a temporary file during the TeX run, close it a load it back to TeX per every command call, please see mal-dot2tex-file.tex. We can run all LaTeX engines.

Solution B: We could use LuaTeX to generate that part of the TeX code for us and run it on-the-fly, please see mal-dot2tex.tex. We can run LuaLaTeX only on that file.

If we don't have dot2tex installed we can run these commands manually:

dot -Tpdf -O mal-dot2tex-file-dot2tex-fig1.dot
dot -Tpdf -O mal-dot2tex-dot2tex-fig1.dot

I enclose both snippets and a preview of the PDF file.

The content of the mal-dot2tex-file.tex file is this:

%! *latex mal-dot2tex-file.tex
\documentclass{article}
\pagestyle{empty}
\usepackage{dot2texi}
\usepackage{tikz}
\usetikzlibrary{shapes,arrows}
\def\malfile{malwrite.txt}
\newwrite\malwrite
\long\def\map#1{
  \immediate\openout\malwrite=\malfile
  \immediate\write\malwrite{%
\string\begin{dot2tex}[dot]^^J%
digraph {^^J%
\noexpand#1^^J%
}^^J%
\string\end{dot2tex}^^J%
}
  \immediate\closeout\malwrite
  \input{\malfile}
  }% End of \map...
\begin{document}
\map{A -> B -> C -> {C1 C2};}
\end{document}

The content of the mal-dot2tex.tex file is this:

%! lualatex mal-dot2tex.tex
\documentclass{article}
\pagestyle{empty}
\usepackage{luatextra}
\usepackage{dot2texi}
\usepackage{tikz}
\long\def\map#1{\directlua{map([[#1]])}}
\usepackage{luacode}
\usetikzlibrary{shapes,arrows}
\begin{luacode*}
function map(text)
malstring=[[
\begin{dot2tex}[dot]
digraph {
]]..text..[[

}
\end{dot2tex}]]
tex.print(malstring)
end
\end{luacode*}
\begin{document}
\map{A -> B -> C -> {C1 C2};}
\end{document}

And this is a preview of that sample from GraphViz:

mwe

  • Thanks a lot for your answer! I chose solution A for my document. Maybe you can comment briefly, why you append ^^J after each line in the second argument of \write? It doesn't seem to change anything if i omit it. – user1146332 Apr 14 '14 at 8:33
  • That's a new line (known as \n in some programming languages) in the generated file. – Malipivo Apr 14 '14 at 8:34
  • Great! Now i fully understand! – user1146332 Apr 14 '14 at 8:37

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