/usr/share/doc/swig4.0-examples/Examples/test-suite/typedef_funcptr.i

// Tests typedef through function pointers

%module typedef_funcptr

%warnfilter(SWIGWARN_RUBY_WRONG_NAME) addf; /* Ruby, wrong constant name */
%warnfilter(SWIGWARN_RUBY_WRONG_NAME) subf; /* Ruby, wrong constant name */

%{
int addf(int x, int y) {
   return x+y;
}
int subf(int x, int y) {
   return x-y;
}
%}

%inline %{
typedef int Integer;

extern "C"
Integer do_op(Integer x, Integer y, Integer (*op)(Integer, Integer)) {
    return (*op)(x,y);
}

typedef int (*FnPtr_int_td)(int, int);
int do_op_typedef_int(int x, int y, FnPtr_int_td op) {
    return (*op)(x,y);
}

typedef Integer (*FnPtr_Integer_td)(Integer, Integer);
Integer do_op_typedef_Integer(Integer x, Integer y, FnPtr_Integer_td op) {
    return (*op)(x,y);
}
%}

%constant int     addf(int x, int y);
%constant Integer subf(Integer x, Integer y);

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