From: jglueck@... (=?ISO-8859-1?Q?Bernhard_Gl=FCck?=)
Date: 2001-09-24T08:33:22+09:00
Subject: [ruby-talk:21613] C++ / Ruby questions again

Hi there again..
Slowly I am progressing to getting ruby to integrate perfectly into my
game engine, thanks to all the valueable help from this forum.. I
think i will compile a FAQ for using C++ with Ruby to make those easy
questions more clear to other new developers ( I never found any docs
on the subject )

However I have two questions again..
I want to call an object method from C++ in a ruby class... This works
fine with rb_funcall2 .... I always test with rb_respond_to if the
given objects supports the method (aka message ) however now i want to
pass a parameter to every method i call .... this works great too, but
when the parameter count of the method and the caller do not match i
get a crash....

Now my only help would be a method or other way like rb_respond_to  to
check wether a method needs a parameter and if yes how many.. so that
i only call it when it has the appropriate paramter count.. Is there a
way to do this ?

Second, i askes about how to catch all ruby exceptions.. I think i did
not state clearly what i wanted, i already used rb_eval_string_protect
for code evaluation.. so no crashes happened.. but If e.g a ruby
program throws a string exception i want to present that string to the
user of my program... so is there a way to intercept exceptions check
if they have a presentable data type and display it ? without
interupting program flow ? Maybe with a callback function ?


And something a little bit offtopic... since ruby prints out its debug
messages to the stdout does anybody know how to reroute this output to
a GDI window ? (Win32) i know how to reroute it to a file,but i want
to give the user a nice environemt where they can edit and debug
code....i think rubywin does that but how ? FILE * rerouting to GDI
window ... ?

Thanks in advance
Bernhard Gl�ck