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Message-ID:  <4C967C9B.5010706@gmx.de>
Date:         Sun, 19 Sep 2010 23:11:55 +0200
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From: Arno Trautmann <Arno.Trautmann@GMX.DE>
Subject: boolean expressions in ExplSyntaxNames
To: LATEX-L@listserv.uni-heidelberg.de
Precedence: list
Status: R

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Hi all,

I want to ask whether the following behaviour is intended where
ExplSyntax and ExplSyntaxNames differ:

\documentclass{minimal}
\usepackage{expl3}

\begin{document}
\ExplSyntaxOn
\bool_if_p:n{
\intexpr_compare_p:n {2=3D3} ||
\intexpr_compare_p:n {4=3D4}
}
\ExplSyntaxOff

%% works fine up to here

\ExplSyntaxNamesOn
\bool_if_p:n{
\intexpr_compare_p:n {2=3D3} ||
\intexpr_compare_p:n {4=3D4}
}
\ExplSyntaxNamesOff

\end{document}

In SyntaxNames, I get the error

! Use of \bool_|_0:w doesn't match its definition.
<argument>  \intexpr_compare_p:n {2=3D3} ||
                                          \intexpr_compare_p:n {4=3D4}
l.16 }

The use of && is successfull in both cases, though. I guess this is
because the line in ExplSyntax:

\tex_catcode:D 124=3D11 \tex_relax:D % vertical bar, other

is missing in SyntaxNames.
So is it intended that boolean expressions cannot be fully evaluated in
SyntaxNames? Or didn=E2=80=99t anybody have requested this yet?
I need it because of some TikZ code I=E2=80=99m using at that place. I co=
uld
make the boolean test at another place and then use a boolean variable
at the TikZ code, but that wouldn=E2=80=99t be very nice =E2=80=A6

Cheers
Arno


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