Re: [luabind] tostring issues

[Korval <Ko...@co...>]

I have to wonder why you're trying to bind legacy objects directly to Lua
without some kind of wrapper class. If you don't have direct control over a
piece of code, it's better to operate through a layer than to talk directly
to something you may need to mutate.

-----Original Message-----
From: lua...@li...
[mailto:lua...@li...]On Behalf Of
Alexander Gladysh
Sent: Monday, June 26, 2006 8:52 AM
To: lua...@li...
Subject: [luabind] tostring issues


Hi, all!

As far as I understand, to be able to do tostring() operation in Lua
on Luabind user-type, one have to write std::ostream&
operator<<(std::ostream&, type&);
 for that type in C++. But what if I already have that operator (as
legacy and unchangeable code), and want to get completely different
text representation for Lua (say, to convert to Lua code on tostring()
to allow deserialization)? I'd like to be able to specify custom
function to .tostring() binding function. Is it possible?

There is one more issue. If I call tostring() in Lua on any of Luabind
objects, which do not have bound tostring operator in C++, I get a
crash like "no such operator defined". This is inconsistent with
behaviour of tostring() for other types and leads to writing extra
type checks. It would be *MUCH* more convenient to have something like
"luabind: HEXADRESS" as a result, like for tables and functions.

Thanks in advance,
Alexander.

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