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Hello everyone,
I apologize for sending a really long email, but
I'd really appreciate it, if someone could give me a solution
I just downloaded SWIG 1.3.22, since I want to access my C++ library from a perl
script.
When I used pure virtual functions, I ran into a
problem, where the wrapper file generated by swig refused to
compile.
Here's a simple example representing my
problem.
I used it on Red Hat 9, with g++
3.2.2.
The interface file, header file, source code is
pasted below, followed by my shell commands, followed by the compiler
output
Thanks, in advance,
Swaroop Sayeram
/*
Interface file - farmer.i
*/
%module farmer
%{
/* Includes the
header in the wrapper code */
#include
"farmer.h"
%}
/*
Header File - farmer.h
*/
class Farmer_Parent {
public:
virtual Farmer_Parent* Copy( ) const = 0;
};
class Farmer : public Farmer_Parent {
public:
Farmer(char *name, int
age);
Farmer();
~Farmer();
int how_tired() { return tiredness;
}
int how_long() { return howlong;
}
void do_chores(int
howlong);
virtual Farmer_Parent *Copy( )
const;
private:
char
*name;
int age;
int
tiredness;
int howlong;
};
/*
C++ File - farmer.c
*/
#include"string.h"
#include"stdlib.h"
#include "farmer.h"
Farmer::Farmer(char *name, int age) {
this->name =
strdup(name);
this->age = age;
tiredness = 0;
howlong = 0;
}
Farmer::~Farmer() {
free(name);
}
void
Farmer::do_chores(int hl) {
howlong += hl;
tiredness += (age
* hl);
}
Farmer_Parent*
Farmer::Copy() const {
Farmer* f = new
Farmer();
return f;
}
$swig -perl5 -c++ farmer.i
$g++ -c -fpic -Dexplicit= farmer.c farmer_wrap.cxx -D_REENTRANT
-D_GNU_SOURCE -DTHREADS_HAVE_PIDS -DDEBUGGING -fno-strict-aliasing -isystem
/usr/local/include -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64
-I/usr/include/gdbm
-I/usr/lib/perl5/5.8.0/i386-linux-thread-multi/CORE
In file included from
farmer_wrap.cxx:869:
farmer.h:3:32: macro "Copy" requires 4 arguments, but
only 1 given
In file included from farmer_wrap.cxx:869:
farmer.h:3: `Copy'
declared as a `virtual' field
farmer.h:3: parse error before
`const'
farmer.h:15:35: macro "Copy" requires 4 arguments, but only 1
given
farmer.h:15: `Copy' declared as a `virtual' field
farmer.h:15: parse
error before `const'
farmer_wrap.cxx:908:71: macro "Copy" requires 4
arguments, but only 1 given
farmer_wrap.cxx:1139:64: macro "Copy" requires 4
arguments, but only 1 given
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