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#ifndef units_hh_INCLUDED
#define units_hh_INCLUDED
#include "assert.hh"
#include "hash.hh"
#include <type_traits>
namespace Kakoune
{
template<typename RealType, typename ValueType = int>
class StronglyTypedNumber
{
public:
StronglyTypedNumber() = default;
[[gnu::always_inline]]
constexpr StronglyTypedNumber(ValueType value)
: m_value(value)
{
static_assert(std::is_base_of<StronglyTypedNumber, RealType>::value,
"RealType is not derived from StronglyTypedNumber");
}
[[gnu::always_inline]]
constexpr friend RealType operator+(RealType lhs, RealType rhs)
{ return RealType(lhs.m_value + rhs.m_value); }
[[gnu::always_inline]]
constexpr friend RealType operator-(RealType lhs, RealType rhs)
{ return RealType(lhs.m_value - rhs.m_value); }
[[gnu::always_inline]]
constexpr friend RealType operator*(RealType lhs, RealType rhs)
{ return RealType(lhs.m_value * rhs.m_value); }
[[gnu::always_inline]]
constexpr friend RealType operator/(RealType lhs, RealType rhs)
{ return RealType(lhs.m_value / rhs.m_value); }
[[gnu::always_inline]]
RealType& operator+=(RealType other)
{ m_value += other.m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType& operator-=(RealType other)
{ m_value -= other.m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType& operator*=(RealType other)
{ m_value *= other.m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType& operator/=(RealType other)
{ m_value /= other.m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType& operator++()
{ ++m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType& operator--()
{ --m_value; return static_cast<RealType&>(*this); }
[[gnu::always_inline]]
RealType operator++(int)
{ RealType backup(static_cast<RealType&>(*this)); ++m_value; return backup; }
[[gnu::always_inline]]
RealType operator--(int)
{ RealType backup(static_cast<RealType&>(*this)); --m_value; return backup; }
[[gnu::always_inline]]
constexpr RealType operator-() const { return RealType(-m_value); }
[[gnu::always_inline]]
constexpr friend RealType operator%(RealType lhs, RealType rhs)
{ return RealType(lhs.m_value % rhs.m_value); }
[[gnu::always_inline]]
RealType& operator%=(RealType other)
{ m_value %= other.m_value; return static_cast<RealType&>(*this); }
constexpr friend bool operator==(StronglyTypedNumber lhs, StronglyTypedNumber rhs) = default;
constexpr friend auto operator<=>(StronglyTypedNumber lhs, StronglyTypedNumber rhs) = default;
[[gnu::always_inline]]
constexpr bool operator!() const
{ return not m_value; }
[[gnu::always_inline]]
explicit constexpr operator ValueType() const { return m_value; }
[[gnu::always_inline]]
explicit constexpr operator bool() const { return m_value; }
friend constexpr size_t hash_value(RealType val) { return hash_value(val.m_value); }
friend constexpr size_t abs(RealType val) { return val.m_value < ValueType(0) ? -val.m_value : val.m_value; }
explicit operator size_t() { kak_assert(m_value >= 0); return (size_t)m_value; }
protected:
ValueType m_value;
};
struct LineCount : public StronglyTypedNumber<LineCount, int>
{
using StronglyTypedNumber::StronglyTypedNumber;
};
[[gnu::always_inline]]
inline constexpr LineCount operator"" _line(unsigned long long int value)
{
return LineCount(value);
}
struct ByteCount : public StronglyTypedNumber<ByteCount, int>
{
using StronglyTypedNumber::StronglyTypedNumber;
};
[[gnu::always_inline]]
inline constexpr ByteCount operator"" _byte(unsigned long long int value)
{
return ByteCount(value);
}
template<typename Byte>
requires (std::is_same_v<std::remove_cv_t<Byte>, char> or std::is_same_v<std::remove_cv_t<Byte>, void>)
Byte* operator+(Byte* ptr, ByteCount count) { return ptr + (int)count; }
struct CharCount : public StronglyTypedNumber<CharCount, int>
{
using StronglyTypedNumber::StronglyTypedNumber;
};
[[gnu::always_inline]]
inline constexpr CharCount operator"" _char(unsigned long long int value)
{
return CharCount(value);
}
struct ColumnCount : public StronglyTypedNumber<ColumnCount, int>
{
using StronglyTypedNumber::StronglyTypedNumber;
};
[[gnu::always_inline]]
inline constexpr ColumnCount operator"" _col(unsigned long long int value)
{
return ColumnCount(value);
}
}
#endif // units_hh_INCLUDED
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