[ruby-talk:03559] Re: Extension in C++?

>>>>> "R" == Robert Feldt <[e-mail]> writes:

R> rubycpp.cpp: In function `VALUE rbcpp_init(long unsigned int)':
R> rubycpp.cpp:16: ANSI C++ prohibits conversion from `(Func *)' to `(...)'

 Look at fltk :

pigeon% cat tt.cc
#include <ruby.h>
class Func {
public:
  int f(int x) { return 2*x; }
};
#define RB_FINALIZER(func) ((void (*)(...))func)
#define RB_METHOD(func) ((VALUE (*)(...))func)
 
VALUE cFunc;
 
static void rbcpp_free(Func* obj) {
  delete obj;
}
 
static VALUE rbcpp_init(VALUE self) {
  Func* new_obj = new Func;
  return Data_Wrap_Struct(cFunc, 0, RB_FINALIZER(rbcpp_free), new_obj);
}
 
static VALUE rbcpp_f(VALUE self, VALUE x) {
  Func* obj;
  Data_Get_Struct(self, class Func, obj);
  return INT2NUM(obj->f(NUM2INT(x)));
}
 
extern "C" void Init_rubycpp() {
  cFunc = rb_define_class("Func", rb_cObject);
  rb_define_method(cFunc, "f", RB_METHOD(rbcpp_f), 1);
  rb_define_method(cFunc, "initialize", RB_METHOD(rbcpp_init), 0);
}
pigeon% 

pigeon% make
g++ -fPIC -I/usr/lib/ruby/1.4/i686-linux -g -O2  -I/usr/include    -c -o tt.o tt.cc
gcc -shared   -o tt.so tt.o -lc 
pigeon% 



Guy Decoux