language: C++11 (gcc-4.7.2)
date: 184 days 9 hours ago
link:
visibility: private 
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#include <string>
#include <map>
#include <memory>
#include <vector>
#include <iostream>
 
struct Parameter
{
};
 
template<typename T>
struct TypedParameter : public Parameter
{
    TypedParameter (const T& data): data(data){};
    T data;
};
 
struct ParameterList
{
    template <class... NamedParams>
    ParameterList(NamedParams... namedParams)
    {
        buildList(namedParams...);
    }
    
    std::map<std::wstring, std::shared_ptr<Parameter>> list;
 
    template<class T> void addParameter(const std::wstring& name, const T& param)
    {
        list[name] = std::shared_ptr<Parameter>(new TypedParameter<T>(param));
    }
 
    template<class T> T& getParameter(const std::wstring& name) const
    {
        return static_cast<TypedParameter<T>*>(list.at(name).get())->data;
    }
private:
    template <class... NamedParams>
    void buildList() {}
    template <class Name, class Value, class... NamedParams>
    void buildList(Name&& name, Value&& value, NamedParams... restParams)
    {
        addParameter(name, value);
        buildList(restParams...);
    }
    template<class Single, class... Rest>
    void buildList(const Single&, Rest... rest);
};
 
class Test
{
private:
    const ParameterList _param;
protected:
public:
    Test(ParameterList p):
        _param(p)
    {
    }
 
    Test(const std::wstring& name, int age) : _param(L"name", name, L"age", age)
    {
    }
 
    void Present()
    {
        std::wcout << L"My name is " << _param.getParameter<std::wstring>(L"name");
        std::wcout << L" and I'm " << _param.getParameter<int>(L"age") << L" years old." << std::endl;
    }
};
 
int main() {
    Test test(L"Piotr", 42);
    test.Present();
}