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From: "Jairo A. del Rio" <jairoadelrio6@gmail.com>
Newsgroups: gmane.comp.tex.context
Subject: Re: ctxlua percentage format escape
Date: Sat, 29 May 2021 08:02:23 -0500
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Hi, Adam. There are some ways to do it. I'm sure there are many more, but I
don't remember them right now. Hi, Hans. There's a bug (?) in syst-lua.lua
related to \expression in MkIV (xmath and xcomplex aren't defined). Please
fix that


%Temporary hack for MkIV

%Only use it in case \expression ... \relax doesn't work

\startmkivmode

\startluacode

xmath =3D xmath or math

xcomplex =3D xcomplex or {} --maybe math too???

\stopluacode

\stopmkivmode

\starttext

$\pi =3D \ctxlua{context("\letterpercent.6f", math.pi)}$


$\pi =3D \expression string.format("\letterpercent.6f", pi)\relax$


%Changing catcodes so $ and % are letter characters

\startasciimode

\m{\pi =3D \expression ("%.6f"):format(pi) \relax}


\m{\pi =3D \ctxlua{context("%.6f", math.pi)}}

\stopasciimode

\stoptext

Regards,


Jairo

El s=C3=A1b, 29 de may. de 2021 a la(s) 07:32, Adam Reviczky (reviczky@gmai=
l.com)
escribi=C3=B3:

> Hi,
>
> I was trying to use a quick calculation like the new mathfun in lmtx for
> an older mkiv document.
>
> MWE from the wiki:
> https://wiki.contextgarden.net/Programming_in_LuaTeX#Examples
>
> \starttext
> $\pi =3D \ctxlua{context("\%.6f", math.pi)}$
> \stoptext
>
> But that gives an error (actually for both lmtx and mkiv): token call,
> syntax: [ctxlua]:1: invalid escape sequence near '"\%'
>
> Whereas
>
> \starttext
> $\pi =3D \startluacode context("%.6f", math.pi) \stopluacode$
> \stoptext
>
> Works fine as expected.
>
> Is there a way to escape the percentage sign in ctxlua as a format value?
>
> Adam
>
> _________________________________________________________________________=
__________
> If your question is of interest to others as well, please add an entry to
> the Wiki!
>
> maillist : ntg-context@ntg.nl /
> http://www.ntg.nl/mailman/listinfo/ntg-context
> webpage  : http://www.pragma-ade.nl / http://context.aanhet.net
> archive  : https://bitbucket.org/phg/context-mirror/commits/
> wiki     : http://contextgarden.net
>
> _________________________________________________________________________=
__________
>

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<div dir=3D"ltr">

<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">Hi, Adam. Ther=
e are some ways to do it. I&#39;m sure there are many more, but I don&#39;t=
 remember them right now. Hi, Hans. There&#39;s a bug (?) in syst-lua.lua r=
elated to \expression in MkIV (xmath and xcomplex aren&#39;t defined). Plea=
se fix that<br></p><p style=3D"margin:0px;text-indent:0px;white-space:pre-w=
rap"><br>%Temporary hack for MkIV</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">%Only use it i=
n case \expression ... \relax doesn&#39;t work</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\startmkivmode=
</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\startluacode<=
/p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">xmath      =3D=
 xmath       or math</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">xcomplex =3D x=
complex or {} --maybe math too???</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\stopluacode</=
p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\stopmkivmode<=
/p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\starttext</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">$\pi =3D \ctxl=
ua{context(&quot;\letterpercent.6f&quot;, math.pi)}$</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap"><br></p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">$\pi =3D \expr=
ession string.format(&quot;\letterpercent.6f&quot;, pi)\relax$ </p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap"><br></p><p sty=
le=3D"margin:0px;text-indent:0px;white-space:pre-wrap">%Changing catcodes s=
o $ and % are letter characters<br></p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\startasciimod=
e </p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\m{\pi =3D \ex=
pression (&quot;%.6f&quot;):format(pi) \relax}</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap"><br></p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\m{\pi =3D \ct=
xlua{context(&quot;%.6f&quot;, math.pi)}}</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\stopasciimode=
</p>
<p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">\stoptext<br><=
br></p><p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">Regards=
,<br></p><p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap"><br><=
/p><p style=3D"margin:0px;text-indent:0px;white-space:pre-wrap">Jairo<br></=
p></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_attr=
">El s=C3=A1b, 29 de may. de 2021 a la(s) 07:32, Adam Reviczky (<a href=3D"=
mailto:reviczky@gmail.com">reviczky@gmail.com</a>) escribi=C3=B3:<br></div>=
<blockquote class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-=
left:1px solid rgb(204,204,204);padding-left:1ex"><div dir=3D"ltr"><div>Hi,=
<br><br>I was trying to use a quick calculation like the new mathfun in lmt=
x for an older mkiv document.<br><br>MWE from the wiki:<br><a href=3D"https=
://wiki.contextgarden.net/Programming_in_LuaTeX#Examples" target=3D"_blank"=
>https://wiki.contextgarden.net/Programming_in_LuaTeX#Examples</a><br><br>\=
starttext<br>$\pi =3D \ctxlua{context(&quot;\%.6f&quot;, math.pi)}$<br>\sto=
ptext<br><br>But that gives an error (actually for both lmtx and mkiv): tok=
en call, syntax: [ctxlua]:1: invalid escape sequence near &#39;&quot;\%&#39=
;<br><br></div><div>Whereas</div><div><br></div><div>\starttext<br>$\pi =3D=
 \startluacode context(&quot;%.6f&quot;, math.pi) \stopluacode$<br>\stoptex=
t</div><div><br></div><div>Works fine as expected.</div><div><br></div><div=
>Is there a way to escape the percentage sign in ctxlua as a format value?<=
/div><div><br></div><div>Adam<br></div></div>
___________________________________________________________________________=
________<br>
If your question is of interest to others as well, please add an entry to t=
he Wiki!<br>
<br>
maillist : <a href=3D"mailto:ntg-context@ntg.nl" target=3D"_blank">ntg-cont=
ext@ntg.nl</a> / <a href=3D"http://www.ntg.nl/mailman/listinfo/ntg-context"=
 rel=3D"noreferrer" target=3D"_blank">http://www.ntg.nl/mailman/listinfo/nt=
g-context</a><br>
webpage=C2=A0 : <a href=3D"http://www.pragma-ade.nl" rel=3D"noreferrer" tar=
get=3D"_blank">http://www.pragma-ade.nl</a> / <a href=3D"http://context.aan=
het.net" rel=3D"noreferrer" target=3D"_blank">http://context.aanhet.net</a>=
<br>
archive=C2=A0 : <a href=3D"https://bitbucket.org/phg/context-mirror/commits=
/" rel=3D"noreferrer" target=3D"_blank">https://bitbucket.org/phg/context-m=
irror/commits/</a><br>
wiki=C2=A0 =C2=A0 =C2=A0: <a href=3D"http://contextgarden.net" rel=3D"noref=
errer" target=3D"_blank">http://contextgarden.net</a><br>
___________________________________________________________________________=
________<br>
</blockquote></div>

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