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  1.     #include <string>
  2.     #include <map>
  3.     #include <memory>
  4.     #include <iostream>
  5.  
  6.     struct Parameter{};
  7.  
  8.     template<typename T>
  9.     struct TypedParameter : public Parameter
  10.     {
  11.     public:
  12.             TypedParameter (const T& data): data(data){};
  13.             T data;
  14.     };
  15.  
  16.     struct ParameterList
  17.     {
  18.             std::map<std::wstring, std::shared_ptr<Parameter>> list;
  19.  
  20.         //ParameterList(){}
  21.  
  22.         ParameterList(const ParameterList& other):list(other.list){}
  23.  
  24.         template<typename... KeyValues>
  25.         ParameterList(KeyValues const &... keyvalues)
  26.         {
  27.             std::make_tuple( ( addPair(keyvalues), 0 )... );
  28.         }
  29.  
  30.             template<class T> void addParameter(const std::wstring& name, const T& param)
  31.             {
  32.                     list[name] = std::shared_ptr<Parameter>(new TypedParameter<T>(param));
  33.             }
  34.  
  35.         template<class K, class T> void addPair(std::pair<K, T> const & param)
  36.         {
  37.             addParameter<T>(param.first, param.second);
  38.         }
  39.  
  40.             template<class T> T& getParameter(const std::wstring& name) const
  41.             {
  42.                     return static_cast<TypedParameter<T>*>(list.at(name).get())->data;
  43.             }
  44.     };
  45.  
  46.     class Test
  47.     {
  48.     private:
  49.         ParameterList _param;
  50.     protected:
  51.     public:
  52.         Test(ParameterList p): _param(p){}
  53.  
  54.         void Present()
  55.         {
  56.             std::wcout << L"My name is " << _param.getParameter<std::wstring>(L"name");
  57.             std::wcout << L" and I'm " << _param.getParameter<int>(L"age") << L" years old." << std::endl;
  58.         }
  59.     };
  60.  
  61.     int main()
  62.     {
  63.         Test t1(ParameterList(
  64.             std::make_pair(L"name", L"Vorel"),
  65.             std::make_pair(L"age", 19870),
  66.             std::make_pair(L"job", L"dragon")));
  67.  
  68.         t1.Present();
  69.  
  70.         getchar();
  71.     }
  72.  
Success #stdin #stdout 0s 3092KB
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Standard input is empty
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My name is Vorel years old.My name is  and I'm ?????????????????????????????????????????????????????????? and I'm 19870 years old.
https://ideone.com/66IanK
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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