Re: lpdf.checkedkey has problem with false values

[Michail Vidiassov <master@iaas.msu.ru>]

Dear Hans,

> more like
>
> function lpdf.checkedkey(t,key,variant)

thank you. That works. Please, commit.

Michail

PS.
lpdf.checkedkey issue was raised while I reviewed 3D PDF support.
But there are greater problems:

It seems that u3d inclusion stopped to work in the current (2014.09.06
20:59) ConTeXt.
Texlive 2014 works.

As far as I can track, the problem is caused by the change in
function register(askedname,specification) from grph-inc.lua:
if "format %a supported by output file format" (and u3d falls under
this category)
specification.found is set to false in the current ConTeXt.
If I set it to true in this case (as in TeXLive 2014 version of
ConTeXt) things start to work again.
May be by doing so I am reversing some unfinished change, but "it works for me".

The relevant patch:
@@ -725,7 +725,7 @@
                     report_inclusion("format %a natively supported by
backend",format)
                 end
             else
-                specification.found = false
+                specification.found = true -- was false
                 if trace_figures then
                     report_inclusion("format %a supported by output
file format",format)
                 end
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