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template<class ret, class ...param_types)
class function_interface {
public:
   virtual ret operator()(param_types... ps)=0;
   virtual ~function_interface ()=0;
};
 
template<class functor, class ret, class ...param_types>
class function_impl : function_interface<ret, param_types...> {
    functor data;
    public:
    function_impl(functor d) :data(std::move(d)) {}
    virtual ret operator()(param_types... ps) {return data();}
};
 
template<class ret, class ...param_types>
class function {
    std::unique_ptr<function_interface<ret, param_types...>> ptr;
public:
    template<class functor>
    function(functor d) :ptr(new function_impl<functor, ret, param_types...>(std::move(d)) {}
    ret operator()(param_types... ps) {return (*ptr)();}
};

prog.cpp:1: error: ISO C++ does not include variadic templates
prog.cpp:1: error: expected ‘>’ before ‘)’ token
prog.cpp:1: error: expected unqualified-id before ‘)’ token
prog.cpp:8: error: ISO C++ does not include variadic templates
prog.cpp:9: error: expected template-name before ‘<’ token
prog.cpp:9: error: expected `{' before ‘<’ token
prog.cpp:9: error: expected unqualified-id before ‘<’ token
prog.cpp:16: error: ISO C++ does not include variadic templates
prog.cpp:18: error: ISO C++ forbids declaration of ‘unique_ptr’ with no type
prog.cpp:18: error: invalid use of ‘::’
prog.cpp:18: error: expected ‘;’ before ‘<’ token
prog.cpp:23: error: expected `}' at end of input
prog.cpp: In constructor ‘function<ret, param_types>::function(functor)’:
prog.cpp:21: error: class ‘function<ret, param_types>’ does not have any field named ‘ptr’
prog.cpp:21: error: ‘move’ is not a member of ‘std’
prog.cpp:21: error: expected `)' before ‘{’ token
prog.cpp:23: error: expected `{' before ‘}’ token
prog.cpp: At global scope:
prog.cpp:23: error: expected unqualified-id at end of input

Standard output is empty