Hi!
I tried to compile the MetaFun manual from
/doc/context/sources/general/manuals/metafun
and ran into a few issues. I don't know if that's expected or if
it's supposed to work on a current LMTX.
Attached are the first two issues. It takes a while to boil it down
to MWEs. Let me know if I should report the other errors, too.
I'm not using the failing bits myself, so I don't need fix for that.
Motivation is to help find issues with the current release.
Marco
%% metafun > log > error: A primary expression can't begin with ';'
\starttext
\startMPcode
uniquelist(a) ;
draw topath(a,--) ysized 2cm
withpen pencircle scaled 1mm
withcolor .625yellow ;
drawpoints topath(a,--) ysized 2cm
withpen pencircle scaled 1mm
withcolor .625red ;
drawpointlabels topath(a,--) ysized 2cm ;
\stopMPcode
\stoptext
%% metapost > trace > <error> unknown string ta
%% metafun > log >
%% metafun > log > error: Equation cannot be performed (unknown string=vacuous)
\setupbackgrounds
[page]
[background={foreground,foregraphics}]
\defineoverlay [foregraphics] [\positionoverlay{foregraphics}]
\starttext
\startMPpositiongraphic{mypos:line}
path pa, pb, pab ; numeric na, nb ; string ta, tb ;
ta := texstr("from") ;
tb := texstr("to") ;
na := positionpage(ta) ;
nb := positionpage(tb) ;
pa := positionbox(ta) ;
pb := positionbox(tb) ;
pa := fullcircle xsized (bbwidth(pa)+4pt) shifted center pa ;
pb := fullcircle xsized (bbwidth(pb)+4pt) shifted center pb ;
if na = nb :
pab := center pa -- center pb ;
pab := pab cutbefore (pab intersectionpoint pa) ;
pab := pab cutafter (pab intersectionpoint pb) ;
pickup pencircle scaled 1pt ;
draw pab withcolor .625yellow ;
positioninregion ;
fi ;
\stopMPpositiongraphic
\startpositionoverlay{foregraphics}
\setMPpositiongraphic{G-1}{mypos:line}{to=G-2}
\stoppositionoverlay
First we have defined an \hpos {G-1} {\strut overlay}.
\stoptext
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