Examples/test-suite/template_default_arg.i

%module template_default_arg

%warnfilter(SWIGWARN_RUBY_WRONG_NAME) Hello;	/* Ruby, wrong class name */
#ifdef SWIGLUA
// lua only has one numeric type, so most of the overloads shadow each other creating warnings
%warnfilter(SWIGWARN_LANG_OVERLOAD_SHADOW) X;
%warnfilter(SWIGWARN_LANG_OVERLOAD_SHADOW) Z;
%warnfilter(SWIGWARN_LANG_OVERLOAD_SHADOW) meth;
#endif

%inline %{
  template <class T>
    struct Foo 
    {
      typedef unsigned int size_type;
      Foo(size_type n = size_type(0) ) { }
    };
  
  int foob(Foo<int> h = Foo<int>()) {return 1; }

  template <class T>
    struct Hello
    {
      typedef unsigned int size_type;

      // This works
      // Hello(size_type n = Hello<T>::size_type(0) ) { }

      // This doesn't
      Hello(size_type n = size_type(0) ) { }

      enum Hi { hi, hello };

      void foo(Hi h = hi) { }
    };

  template <typename T> struct X {
      X(const T& t = T()) {}
      X(double a, const T& t = T(0)) {}
      T meth(double a, const T& t = T(0)) { return t; }
      const T& meth(const T& t = T(0)) { static T tt; tt = t; return tt; }
    };

  template <typename TT> class Y : private X<TT> {
  public:
    // test using on templated class with default args in the method
    using X<TT>::meth;
  };

  template <int V> struct Z 
  {
    Z(int t = V) {}    
    // and also:
    Z(double a, int t = V){}
  };
  
  
%}

%template(Foo_int) Foo<int>;
%template(Hello_int) Hello<int>;
%template(X_int) X<int>;
%template(X_longlong) X<long long>;
%template(X_unsigned) X<unsigned>;
%template(Y_unsigned) Y<unsigned>;

%template(X_hello_unsigned) X<Hello<int> >;
%template(Y_hello_unsigned) Y<Hello<int> >;
%template(X_Foo_Foo_int) X<Foo<Foo<int> > >;
%template(Z_8) Z<8>;
%template(Foo_Z_8) Foo<Z<8> >;
%template(X_Foo_Z_8) X<Foo<Z<8> > >;

%inline %{

  struct Bar : Hello<int>
  {
    Bar(size_type n) : Hello<int>(n)
    {
    }
    
  };
%}


// Templated functions
%inline %{
  // Templated methods which are overloaded and have default args, and %template which
  // uses the same name as the C++ functions and overload on the template parameters and
  // specialization thrown in too. Wow, SWIG can handle this insane stuff!
  template<typename T, typename U> int ott(T t = 0, const U& u = U()) { return 10; }
  template<typename T, typename U> int ott(const char *msg, T t = 0, const U& u = U()) { return 20; }
  int ott(Foo<int>) { return 30; }
  template<typename T> int ott(Hello<int> h, T t = 0) { return 40; }
  template<> int ott<int>(Hello<int> h, int t) { return 50; }
  template<> int ott(Hello<int> h, double t) { return 60; }
%}

%template(ott) ott<int, int>;
%template(ott) ott<double>;
%template(ottint) ott<int>; // default arg requires a rename
%template(ottstring) ott<const char *>; // default arg requires a rename


// Above test in namespaces
%inline %{
namespace OuterSpace {
  namespace InnerSpace {
    // Templated methods which are overloaded and have default args, and %template which
    // uses the same name as the C++ functions and overload on the template parameters and
    // specialization thrown in too. Wow, SWIG can handle this insane stuff!
    template<typename T, typename U> int nsott(T t = 0, const U& u = U()) { return 110; }
    template<typename T, typename U> int nsott(const char *msg, T t = 0, const U& u = U()) { return 120; }
    int nsott(Foo<int>) { return 130; }
    template<typename T> int nsott(Hello<int> h, T t = 0) { return 140; }
    template<> int nsott<int>(Hello<int> h, int t) { return 150; }
    template<> int nsott(Hello<int> h, double t) { return 160; }
  }
}
%}

%template(nsott) OuterSpace::InnerSpace::nsott<int, int>;
%template(nsott) OuterSpace::InnerSpace::nsott<double>;
%template(nsottint) OuterSpace::InnerSpace::nsott<int>; // default arg requires a rename
%template(nsottstring) OuterSpace::InnerSpace::nsott<const char *>; // default arg requires a rename