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  1.     namespace detail
  2.     {
  3.         template<typename T>
  4.         struct dummy
  5.         {
  6.             T get() const { return T(); }
  7.             void set(T) { }
  8.         };
  9.     }
  10.  
  11.     #include <type_traits>
  12.  
  13.     // Simple Property
  14.     template<typename Value,
  15.              typename ValueOwner = detail::dummy<Value>,
  16.              Value (ValueOwner::*Getter)(void) const = &ValueOwner::get,
  17.              void (ValueOwner::*Setter)(Value) = &ValueOwner::set,
  18.              bool = std::is_same<ValueOwner, detail::dummy<Value>>::value
  19.              >
  20.     class Property {
  21.         public:
  22.  
  23.             Value get() const { return m_value; }
  24.  
  25.             void set(Value value) { m_value = value; }
  26.  
  27.         private:
  28.  
  29.             Value m_value;
  30.     };
  31.  
  32.     // Complicated Property
  33.     template<
  34.         typename Value,
  35.         typename ValueOwner,
  36.         Value (ValueOwner::*Getter)(void) const,
  37.         void (ValueOwner::*Setter)(Value)
  38.     >
  39.     class Property<Value, ValueOwner, Getter, Setter, false>
  40.     {
  41.       // Stuff for calling the getter & setter
  42.     };
  43.  
  44.     struct MyClass
  45.     {
  46.         int get() const { return 42; }
  47.         void set(int) { }
  48.     };
  49.  
  50.     int main()
  51.     {
  52.         Property<int> simpleProperty;
  53.         simpleProperty.get();
  54.  
  55.         Property<int, MyClass, &MyClass::get, &MyClass::set> complicatedProperty;
  56.     }
  57.  
Success #stdin #stdout 0s 2892KB
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https://ideone.com/pOX9wh
language:
C++14 (gcc 8.3)
created:
11 years ago
visibility:
public

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