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sparse_set_iterator: operator==/operator<=>

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skypjack
2026-01-12 15:35:46 +01:00
parent 3066d0ed5c
commit b3eef84102
1 changed files with 15 additions and 30 deletions
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45
src/entt/entity/sparse_set.hpp
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@@ -1,6 +1,7 @@
#ifndef ENTT_ENTITY_SPARSE_SET_HPP
#define ENTT_ENTITY_SPARSE_SET_HPP
#include <compare>
#include <cstddef>
#include <iterator>
#include <memory>
@@ -84,6 +85,20 @@ struct sparse_set_iterator final {
return operator[](0);
}
[[nodiscard]] constexpr std::ptrdiff_t operator-(const sparse_set_iterator &other) const noexcept {
// intentionally reversed due to backward iteration
return other.offset - offset;
}
[[nodiscard]] constexpr bool operator==(const sparse_set_iterator &other) const noexcept {
return offset == other.offset;
}
[[nodiscard]] constexpr auto operator<=>(const sparse_set_iterator &other) const noexcept {
// intentionally reversed due to backward iteration
return other.offset <=> offset;
}
[[nodiscard]] constexpr pointer data() const noexcept {
return packed ? packed->data() : nullptr;
}
@@ -97,36 +112,6 @@ private:
difference_type offset;
};
template<typename Container>
[[nodiscard]] constexpr std::ptrdiff_t operator-(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return rhs.index() - lhs.index();
}
template<typename Container>
[[nodiscard]] constexpr bool operator==(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return lhs.index() == rhs.index();
}
template<typename Container>
[[nodiscard]] constexpr bool operator<(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return lhs.index() > rhs.index();
}
template<typename Container>
[[nodiscard]] constexpr bool operator>(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return rhs < lhs;
}
template<typename Container>
[[nodiscard]] constexpr bool operator<=(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return !(lhs > rhs);
}
template<typename Container>
[[nodiscard]] constexpr bool operator>=(const sparse_set_iterator<Container> &lhs, const sparse_set_iterator<Container> &rhs) noexcept {
return !(lhs < rhs);
}
} // namespace internal
/*! @endcond */