Re: [Wxlua-users] multi-level C++ namespaces

[Darwin S. <dar...@ho...>]

Thanks for your reply,

I have tried your suggestions but have had no luck unfortunately. I have 
attached
some of the compiler output below.

Just to clarify what I'm trying to do first:
I have a class called MyClass in a namespace called nsa. Its a very simple 
class with 2 member functions SetX and GetX which set and return an int. I 
would eventually like to move this
class into sub-namespace of nsa called nsb. My main problem is that I don't 
want to move the
class into the global C++ namepsace. Ideally I would also like to access 
this class in lua by
using nsa.nsb.MyClass but I don't mind using nsa_nsb.MyClass.

I tried adding "#include \"MyClass.h\"; using nsa::MyClass" in the 
hook_cpp_binding option but this
produced the following errors:
wxluanstest.cpp:21: error: ‘MyClass’ is already declared in this scope
wxluanstest.cpp: In function ‘int wxLua_MyClass_constructor(lua_State*)’:
wxluanstest.cpp:40: error: no matching function for call to 
‘wxLua_AddToTrackedMemoryList(wxLuaState&, nsa::MyClass*)’
/usr/local/include/wxlua/include/wxlbind.h:189: note: candidates are: void 
wxLua_AddToTrackedMemoryList(wxLuaState&, wxObject*)
/usr/local/include/wxbind/include/wxbind.h:2920: note:                 void 
wxLua_AddToTrackedMemoryList(wxLuaState&, wxString*)
/usr/local/include/wxbind/include/wxbind.h:2921: note:                 void 
wxLua_AddToTrackedMemoryList(wxLuaState&, wxWindowDisabler*)
/usr/local/include/wxbind/include/wxbind.h:2929: note:                 void
...



Using nsa::MyClass instead of just MyClass in the .i file without the 
hook_cpp_binding
value above produced:

wxluanstest.h:48: error: ‘wxObject_nsa’ has not been declared
wxluanstest.h:48: error: expected unqualified-id before ‘:’ token
wxluanstest.cpp:110: error: ‘wxLua_nsa’ has not been declared
wxluanstest.cpp:111: error: ‘wxLua_nsa’ has not been declared
make: *** [wxluanstest.o] Error 1


Sorry for the long mail and if you want to look at my code or need any more 
information please
let me know.

Any help would be appreciated,
Darwin Slattery


>I have been having problems with generating the bindings for classes when
>they exist in sub-namespaces of the main namespaces e.g.
>a::b::MyClass
>
>I was not able to set this namesace in the rules file using the
>hook_cpp_namespace because this caused problems with the #ifndef at the top
>of the generated binding header e.g.:
>
><code>
>#ifndef __HOOK_WXLUA_a::b_H__
>#define __HOOK_WXLUA_a::b_H__
></code>

This is ok, hook_cpp_namespace is not really a C++ "namespace", but
rather a way to make sure that the names of the functions and
everything else created by the binding generator are unique.

Try just hook_cpp_namespace = "a_b"

To use a real C++ namespace use one of the
hook_cpp_binding_[XXX_includes] to add any code you need to the
bindings.

>It also seems to only process the first part of the namespace:
>'wxluatest.h:58: error: 'wxObject_a' has not been declared'
>
>I was just wondering if this is supported or if there is any way around 
>this
>short of editing the generated binding files?

Let us know if the above works for you. I do not believe that I've
ever tried using classes within classes so there may be other issues
as well, but lets hope not.

Regards,
    John Labenski