About adding new script language

[Nala Ginrut <mulei at gnu dot org>]

Hi GDB folks!
I'm new comer here, and I'm trying to make guile the extension language.
Anyway, folks could use python as well, before guile has reliable python
front-end.
I've read the python part, here're some ideas, correct me if I'm wrong
please. ;-)

1. Is it necessary to use language_defn to define the extension
language?
My understanding is language_defn defines a new language support for
debugging the defined language, not to define a new extension language
for other debugging purpose. Or not?
For example, go-lang.c is the support for debugging go, not add go as
the debug script language, just like python. But it confused me that
python has used language_defn.

2. There should be interfaces to add the script language, but I didn't
find it, anyone point me out? I don't think I have to write new
lexer/parser for that, just need a way to get the expr and call guile's
read function. Thanks!

3. My aim is not only add guile as an extension in gdb's REPL, but a
more powerful language for the automatic debugging. For that purpose,
the hard/heavy work is not to add guile into gdb, but a framework
project implemented by guile based on the support of guile-gdb. 
Is this idea too unrealistic?

Happy hacking!
Thanks!

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