From: Hans van der Meer via ntg-context <ntg-context@ntg.nl>
To: NTG ConTeXt <ntg-context@ntg.nl>
Cc: Hans van der Meer <havdmeer@ziggo.nl>
Subject: nil from TeX to Lua
Date: Mon, 9 Aug 2021 21:58:23 +0200 [thread overview]
Message-ID: <C6D68B1B-C07B-44C0-9828-5E4B4069E148@ziggo.nl> (raw)
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In the TeX to Lua interface with
\def\Macro#1{\directlua{luafunction("#1")}}
the transfer from TeX to Lua is by string. However what to do at the Lua end when calling \Macro{}?
As I understand it, then on the Lua side an empty argument and an empty string are indistinguishable. This is not always wanted, for example when one needs to place either a nil or an empty string into a Lua table. I am running in trouble when to t.key set to \Macro{} should become nil or when it should become "".
Is there some common understanding about how to handle this situation?
dr. Hans van der Meer
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next reply other threads:[~2021-08-09 19:58 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-09 19:58 Hans van der Meer via ntg-context [this message]
2021-08-09 20:05 ` Aditya Mahajan via ntg-context
2021-08-10 7:23 ` Taco Hoekwater via ntg-context
2021-08-10 7:59 ` Hans Hagen via ntg-context
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