InfiniTime.git

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#pragma once

namespace Pinetime {
  namespace Utility {
    template <class T>
    class DirtyValue {
    public:
      DirtyValue() = default; // Use NSDMI

      explicit DirtyValue(T const& v) : value {v} {
      } // Use MIL and const-lvalue-ref

      bool IsUpdated() {
        if (this->isUpdated) {
          this->isUpdated = false;
          return true;
        }
        return false;
      }

      T const& Get() {
        this->isUpdated = false;
        return value;
      } // never expose a non-const lvalue-ref

      DirtyValue& operator=(const T& other) {
        if (this->value != other) {
          this->value = other;
          this->isUpdated = true;
        }
        return *this;
      }

    private:
      T value {};            // NSDMI - default initialise type
      bool isUpdated {true}; // NSDMI - use brace initialisation
    };
  }
}