From: context@vivaldi.net
To: ConTeXt <ntg-context@ntg.nl>
Subject: Checking existence of a macro (control sequence) by Lua
Date: Thu, 28 May 2020 00:42:58 +0200 [thread overview]
Message-ID: <b58899c80e0ea1da906ac3a00e427faf@vivaldi.net> (raw)
Hello,
is it possible to check whether a macro exists (or - is it a
non-\undefined control sequence) with Lua? Suppose:
----
\starttext
\def\MyMacro{Ahoj}
\def\MyMac#1#2{Something}
\startluacode
IsDefined = function(ctl_seq)
print("CS " .. ctl_seq ..
(tex.IsCS(ctl_seq) -- Or what to come
here?
"is defined" or "is
unknown") .. ".")
end
-- So the function should print to the console:
IsDefined("MyMacro") --> "CS MyMacro is defined."
IsDefined("MyMac") --> "CS MyMac is defined."
IsDefined("bf") --> "CS bf is defined."
IsDefined("dummy") --> "CS dummy is unknown."
\stopluacode
\stoptext
----
Is it possible?
Best regards,
Lukas
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next reply other threads:[~2020-05-27 22:42 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-27 22:42 context [this message]
2020-05-27 22:49 ` luigi scarso
2020-05-28 7:56 ` Hans Hagen
2020-05-28 6:50 ` Henri Menke
2020-05-28 8:34 ` Hans Hagen
2020-05-28 11:24 ` context
2020-05-28 21:24 ` context
2020-05-29 7:36 ` Hans Hagen
2020-05-29 21:21 ` context
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