Dear Developers and All,
lpdf.checkedkey routine from lpdf-ini.lua has problems with accessing
false boolean values, it returns them as nil. Is it by design or
neglect?
(I vaguely remember stumbling on this problems before, so there is a
chance that I have already got the answer, but have forgotten it.)
The minimal demo:
\starttext
\startluacode
local function writebool(bv,text)
if bv == true then
io.write(text, " true \n")
elseif bv == nil then
io.write(text, " nil \n")
else
io.write(text, " false\n")
end
end
local a = {}
a["x"] = true
a["y"] = false
a["z"] = nil
writebool(lpdf.checkedkey(a,"x","boolean"),"lpdf.checkedkey(a,\"x\",\"boolean\")")
writebool(lpdf.checkedkey(a,"y","boolean"),"lpdf.checkedkey(a,\"y\",\"boolean\")")
writebool(lpdf.checkedkey(a,"z","boolean"),"lpdf.checkedkey(a,\"z\",\"boolean\")")
writebool(a.x,"a.x")
writebool(a.y,"a.y")
writebool(a.z,"a.z")
\stopluacode
TEST
\stoptext
It results in the following relevant output
lpdf.checkedkey(a,"x","boolean") true
lpdf.checkedkey(a,"y","boolean") nil
lpdf.checkedkey(a,"z","boolean") nil
a.x true
a.y false
a.z nil
Note that false value was read by checkedkey as nil.
Sincerely, MIchail
___________________________________________________________________________________
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://tex.aanhet.net
archive : http://foundry.supelec.fr/projects/contextrev/
wiki : http://contextgarden.net
___________________________________________________________________________________
