Thanx Wolfgang
puzzle starts to fit itself ...
Jarda
Dne 30.9.2010 20:53, Wolfgang Schuster napsal(a):
Am 30.09.2010 um 20:40 schrieb Jaroslav Hajtmar:
Hello my wise masters of the Force and teachers of Jedi...
It seems that my first module (SCANCSV of scancsv.lua library of CTM in
Brejlov) work without any visible errors (without
documentation and with a junkyard yet), but I'm not sure whether is there a
hidden problem or future collisions. Therefore I have a few of questions for
modules namespaces, luacode namespaces etc. I want to ask how relates a
namespace ConTeXt module with
namespace of Lua code, which is listed within this module and others questions.
1. Is the namespace of Lua code independent of the namespace module?
Yes.
2. If are ConTeXt macros defined in the module, are automatically in its
namespace?
No, the namespace in a module is only for keys and key-value-lists. When you
write a command with the same name as a core command the core definition is
overwritten and lost.
3. Can both namespaces (module and Luacode) somehow connected?
You can try to use the same namespace in TeX and Lua but thats up to you.
4. What happens when I have two macros with the same name in two different
modules?
The last definition is the current meaning of the command, e.g. in this example
the command \befehl has the content “Befehl” because it’s the last defintion.
\def\befehl{command} % \befehl has not the content “command”
\def\befehl{Befehl} % \befehl has now the content “Befehl” and the content of
the first definition is lost
5. Can I call the macros of the same names in different namespaces (diferent
modules)?
When you call them inside of a environment it’s possible.
\def\startenvone{\bgroup\def\befehl{command}}
\def\stopenvone {\egroup}
\def\startenvtwo{\bgroup\def\befehl{befehl}}
\def\stopenvtwo {\egroup}
\starttext
\startenvone \befehl \stopenvone % \befehl == “command”
\startenvtwo \befehl \stopenvtwo % \befehl == “befehl”
\stoptext
6. Can I read about somewhere more?
- The programming pages on the wiki.
- A book about plain TeX {e.g. The TeXbook, TeX by Topic, TeX for the Impatient
etc.)
7. I enclose below a minimal example of the module (I do not know why there are
some things) to comment or write yours comments and suggestions, etc.
Give me some time to write a detailed description of the \definenamespace
command.
Wolfgang
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