swig/Examples/test-suite/cpp11_variadic_templates.i

/* This testcase checks whether SWIG correctly parses and generates the code
   for variadic templates. This covers the variadic number of arguments inside
   the template brackets, new functions sizeof... and multiple inheritance
   using variadic number of classes.
*/
%module cpp11_variadic_templates
%warnfilter(SWIGWARN_JAVA_MULTIPLE_INHERITANCE,
	    SWIGWARN_CSHARP_MULTIPLE_INHERITANCE,
	    SWIGWARN_D_MULTIPLE_INHERITANCE,
	    SWIGWARN_PHP_MULTIPLE_INHERITANCE,
	    SWIGWARN_RUBY_MULTIPLE_INHERITANCE) MultiInherit;
%warnfilter(SWIGWARN_JAVA_MULTIPLE_INHERITANCE,
	    SWIGWARN_CSHARP_MULTIPLE_INHERITANCE,
	    SWIGWARN_D_MULTIPLE_INHERITANCE,
	    SWIGWARN_PHP_MULTIPLE_INHERITANCE,
	    SWIGWARN_RUBY_MULTIPLE_INHERITANCE) NumerousInherit;
%warnfilter(SWIGWARN_JAVA_MULTIPLE_INHERITANCE,
	    SWIGWARN_CSHARP_MULTIPLE_INHERITANCE,
	    SWIGWARN_D_MULTIPLE_INHERITANCE,
	    SWIGWARN_PHP_MULTIPLE_INHERITANCE,
	    SWIGWARN_RUBY_MULTIPLE_INHERITANCE) LotsInherit;

////////////////////////
// Variadic templates //
////////////////////////
%inline %{
#include <vector>
#include <string>
#include <map>

template<typename... Values>
class MultiArgs {
};

class MultiArgs<int, std::vector<int>, std::map<std::string, std::vector<int>>> multiArgs;

%}

%template (MultiArgs1) MultiArgs<int, std::vector<int>, std::map<std::string, std::vector<int>>>;

////////////////////////
// Variadic sizeof... //
////////////////////////
%inline %{
template<typename... Args> struct SizeOf {
  static const int size = sizeof...(Args);
};
%}

%template (SizeOf0) SizeOf<>;
%template (SizeOf1) SizeOf<int>;
%template (SizeOf2) SizeOf<int, int>;
%template (SizeOf3) SizeOf<int, int, int>;

//////////////////////////
// Variadic inheritance //
//////////////////////////
%inline %{
class A {
public:
  A() {
    a = 100;
  }
  virtual ~A() {}
  int a;
};

class B {
public:
  B() {
    b = 200;
  }
  virtual ~B() {}
  int b;
};

class C {
public:
  C() {
    c = 300;
  }
  virtual ~C() {}
  int c;
};

class D {
public:
  D() {
    d = 400;
  }
  virtual ~D() {}
  int d;
};

template <typename... BaseClasses> class MultiInherit : public BaseClasses... {
public:
  MultiInherit(BaseClasses&... baseClasses) : BaseClasses(baseClasses)... {}
  void MultiInstanceMethod(BaseClasses&... baseClasses) {}
  static void MultiStaticMethod(BaseClasses&... baseClasses) {}
  int InstanceMethod() { return 123; }
  static int StaticMethod() { return 456; }
};
%}

%template (MultiInherit0) MultiInherit<>;
%template (MultiInherit1) MultiInherit<A>;
%template (MultiInherit2) MultiInherit<A,B>;
%template (MultiInherit3) MultiInherit<A,B,C>;

%inline %{
template <typename... BaseClasses> class NumerousInherit : public BaseClasses... {
public:
  NumerousInherit(int i, BaseClasses&... baseClasses) : BaseClasses(baseClasses)... {}
  void NumerousInstanceMethod(int i, BaseClasses&... baseClasses) {}
  static void NumerousStaticMethod(int i, BaseClasses&... baseClasses) {}
  int InstanceMethod() { return 123; }
  static int StaticMethod() { return 456; }
};
%}

%template (NumerousInherit0) NumerousInherit<>;
%template (NumerousInherit1) NumerousInherit<A>;
%template (NumerousInherit2) NumerousInherit<A,B>;
%template (NumerousInherit3) NumerousInherit<A,B,C>;

%inline %{
template <typename T, typename... BaseClasses> class LotsInherit : public T, public BaseClasses... {
public:
  LotsInherit(T t, BaseClasses&... baseClasses) : BaseClasses(baseClasses)... {}
  void LotsInstanceMethod(T t, BaseClasses&... baseClasses) {}
  static void LotsStaticMethod(T t, BaseClasses&... baseClasses) {}
  int InstanceMethod() { return 123; }
  static int StaticMethod() { return 456; }
};
%}

%template (LotsInherit1) LotsInherit<A>;
%template (LotsInherit2) LotsInherit<A,B>;
%template (LotsInherit3) LotsInherit<A,B,C>;
%template (LotsInherit4) LotsInherit<A,B,C,D>;


%inline %{
template <typename... V> struct VariadicParms {
public:
  void ParmsVal(V... vparms_v) {}
  void ParmsPtr(V*... vparms_p) {}
  void ParmsPtrRef(V*&... vparms_pr) {}
  void ParmsPtrRValueRef(V*&&... vparms_rvr) {}
  void ParmsRef(V&... vparms_r) {}
  void ParmsRValueRef(V&&... vparms_r) {}
  void ParmsConstRef(const V&... vparms_cr) {}

// TODO
//  void ParmsFuncPtr(int (*)(V...)) {}
};
%}

%template(VariadicParms1) VariadicParms<A>;
%template(VariadicParms2) VariadicParms<A,B>;
%template(VariadicParms3) VariadicParms<A,B,C>;


// #1863
%inline %{
class Container {
public:
template<typename... Args>
static void notifyMyTypes(void (fn)(Args...));
};
%}
%{
template<typename... Args>
  void Container::notifyMyTypes(void (fn)(Args...)) {}

// Explicit template instantiations
template void Container::notifyMyTypes<>(void (tt)());
template void Container::notifyMyTypes<int>(void (tt)(int));
template void Container::notifyMyTypes<int, double>(void (tt)(int, double));
%}