95 lines
2.2 KiB
C++
95 lines
2.2 KiB
C++
#pragma once
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#define ITERABLE_ENUM_BEGIN(name) enum class name : int {
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#define ITERABLE_ENUM_END ,end, begin = 0 }
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template <class T>
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class Iterable
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{
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public:
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Iterable(T value = T::begin) : mValue(value) {}
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Iterable(const Iterable& other) : mValue(other.mValue) {}
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Iterable& operator++()
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{
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assert(mValue >= T::begin && mValue < T::end);
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mValue = static_cast<T>(static_cast<int>(mValue) + 1);
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return *this;
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}
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Iterable operator++(int)
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{
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Iterable prev = *this;
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mValue = static_cast<T>(static_cast<int>(mValue) + 1);
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return prev;
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}
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Iterable& operator--()
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{
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assert(mValue >= T::end && mValue < T::begin);
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mValue = static_cast<T>(static_cast<int>(mValue) - 1);
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return *this;
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}
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Iterable operator--(int)
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{
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Iterable prev = *this;
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mValue = static_cast<T>(static_cast<int>(mValue) - 1);
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return prev;
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}
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Iterable operator+(int i)
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{
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return static_cast<T>(static_cast<int>(mValue) + i);
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}
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Iterable operator+(T i)
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{
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return static_cast<T>(static_cast<int>(mValue) + static_cast<int>(i));
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}
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Iterable operator-(int i)
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{
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return static_cast<T>(static_cast<int>(mValue) - i);
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}
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Iterable operator-(T i)
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{
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return static_cast<T>(static_cast<int>(mValue) - static_cast<int>(i));
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}
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bool operator >(const T& other) const
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{
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return static_cast<int>(mValue) > static_cast<int>(other);
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}
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bool operator >=(const T& other) const
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{
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return static_cast<int>(mValue) >= static_cast<int>(other);
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}
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bool operator <(const T& other) const
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{
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return static_cast<int>(mValue) < static_cast<int>(other);
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}
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bool operator <=(const T& other) const
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{
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return static_cast<int>(mValue) <= static_cast<int>(other);
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}
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bool operator ==(const T& other) const
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{
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return static_cast<int>(mValue) == static_cast<int>(other);
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}
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bool valid() const { return mValue != T::end; }
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operator T() const { return mValue; }
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operator T&() { return mValue; }
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T val() const { return mValue; }
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private:
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T mValue;
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}; |