sneedmc/logic/DefaultVariable.h
2014-07-16 02:03:52 +02:00

36 lines
582 B
C++

#pragma once
template <typename T>
class DefaultVariable
{
public:
DefaultVariable(const T & value)
{
defaultValue = value;
}
DefaultVariable<T> & operator =(const T & value)
{
currentValue = value;
is_default = currentValue == defaultValue;
is_explicit = true;
return *this;
}
operator const T &() const
{
return is_default ? defaultValue : currentValue;
}
bool isDefault() const
{
return is_default;
}
bool isExplicit() const
{
return is_explicit;
}
private:
T currentValue;
T defaultValue;
bool is_default = true;
bool is_explicit = false;
};