118 lines
3.4 KiB
C++
118 lines
3.4 KiB
C++
#ifndef units_hh_INCLUDED
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#define units_hh_INCLUDED
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#include <type_traits>
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namespace Kakoune
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{
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template<typename RealType, typename ValueType = int>
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class StronglyTypedNumber
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{
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public:
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explicit constexpr StronglyTypedNumber(ValueType value)
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: m_value(value)
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{
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static_assert(std::is_base_of<StronglyTypedNumber, RealType>::value,
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"RealType is not derived from StronglyTypedNumber");
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}
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constexpr RealType operator+(const RealType& other) const
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{ return RealType(m_value + other.m_value); }
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constexpr RealType operator-(const RealType& other) const
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{ return RealType(m_value - other.m_value); }
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constexpr RealType operator*(const RealType& other) const
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{ return RealType(m_value * other.m_value); }
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constexpr RealType operator/(const RealType& other) const
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{ return RealType(m_value / other.m_value); }
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RealType& operator+=(const RealType& other)
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{ m_value += other.m_value; return static_cast<RealType&>(*this); }
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RealType& operator-=(const RealType& other)
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{ m_value -= other.m_value; return static_cast<RealType&>(*this); }
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RealType& operator*=(const RealType& other)
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{ m_value *= other.m_value; return static_cast<RealType&>(*this); }
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RealType& operator/=(const RealType& other)
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{ m_value /= other.m_value; return static_cast<RealType&>(*this); }
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RealType& operator++()
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{ ++m_value; return static_cast<RealType&>(*this); }
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RealType& operator--()
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{ --m_value; return static_cast<RealType&>(*this); }
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RealType operator++(int)
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{ RealType backup(static_cast<RealType&>(*this)); ++m_value; return backup; }
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RealType operator--(int)
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{ RealType backup(static_cast<RealType&>(*this)); --m_value; return backup; }
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constexpr RealType operator-() { return RealType(-m_value); }
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constexpr bool operator==(const RealType& other) const
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{ return m_value == other.m_value; }
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constexpr bool operator!=(const RealType& other) const
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{ return m_value != other.m_value; }
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constexpr bool operator<(const RealType& other) const
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{ return m_value < other.m_value; }
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constexpr bool operator<=(const RealType& other) const
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{ return m_value <= other.m_value; }
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constexpr bool operator>(const RealType& other) const
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{ return m_value > other.m_value; }
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constexpr bool operator>=(const RealType& other) const
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{ return m_value >= other.m_value; }
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constexpr bool operator!() const
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{ return !m_value; }
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explicit constexpr operator ValueType() const { return m_value; }
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explicit constexpr operator bool() const { return m_value; }
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private:
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ValueType m_value;
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};
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struct LineCount : public StronglyTypedNumber<LineCount, int>
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{
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constexpr LineCount(int value = 0) : StronglyTypedNumber<LineCount>(value) {}
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};
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inline constexpr LineCount operator"" _line(unsigned long long int value)
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{
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return LineCount(value);
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}
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struct ByteCount : public StronglyTypedNumber<ByteCount, int>
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{
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constexpr ByteCount(int value = 0) : StronglyTypedNumber<ByteCount>(value) {}
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};
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inline constexpr ByteCount operator"" _byte(unsigned long long int value)
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{
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return ByteCount(value);
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}
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struct CharCount : public StronglyTypedNumber<CharCount, int>
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{
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constexpr CharCount(int value = 0) : StronglyTypedNumber<CharCount>(value) {}
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};
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inline constexpr CharCount operator"" _char(unsigned long long int value)
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{
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return CharCount(value);
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}
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}
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#endif // units_hh_INCLUDED
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