From 3bf42c6ff3805a0d42bbc661794a95ff31bedc26 Mon Sep 17 00:00:00 2001
From: untodesu <kirill@untode.su>
Date: Sat, 15 Mar 2025 16:22:09 +0500
Subject: Add whatever I was working on for the last month

---
 deps/include/entt/meta/range.hpp | 143 +++++++++++++++++++++++++++++++++++++++
 1 file changed, 143 insertions(+)
 create mode 100644 deps/include/entt/meta/range.hpp

(limited to 'deps/include/entt/meta/range.hpp')

diff --git a/deps/include/entt/meta/range.hpp b/deps/include/entt/meta/range.hpp
new file mode 100644
index 0000000..96e4664
--- /dev/null
+++ b/deps/include/entt/meta/range.hpp
@@ -0,0 +1,143 @@
+#ifndef ENTT_META_RANGE_HPP
+#define ENTT_META_RANGE_HPP
+
+#include <cstddef>
+#include <iterator>
+#include <utility>
+#include "../core/fwd.hpp"
+#include "../core/iterator.hpp"
+#include "context.hpp"
+
+namespace entt {
+
+/*! @cond TURN_OFF_DOXYGEN */
+namespace internal {
+
+template<typename Type, typename It>
+struct meta_range_iterator final {
+    using value_type = std::pair<id_type, Type>;
+    using pointer = input_iterator_pointer<value_type>;
+    using reference = value_type;
+    using difference_type = std::ptrdiff_t;
+    using iterator_category = std::input_iterator_tag;
+    using iterator_concept = std::random_access_iterator_tag;
+
+    constexpr meta_range_iterator() noexcept
+        : it{},
+          ctx{} {}
+
+    constexpr meta_range_iterator(const meta_ctx &area, const It iter) noexcept
+        : it{iter},
+          ctx{&area} {}
+
+    constexpr meta_range_iterator &operator++() noexcept {
+        return ++it, *this;
+    }
+
+    constexpr meta_range_iterator operator++(int) noexcept {
+        meta_range_iterator orig = *this;
+        return ++(*this), orig;
+    }
+
+    constexpr meta_range_iterator &operator--() noexcept {
+        return --it, *this;
+    }
+
+    constexpr meta_range_iterator operator--(int) noexcept {
+        meta_range_iterator orig = *this;
+        return operator--(), orig;
+    }
+
+    constexpr meta_range_iterator &operator+=(const difference_type value) noexcept {
+        it += value;
+        return *this;
+    }
+
+    constexpr meta_range_iterator operator+(const difference_type value) const noexcept {
+        meta_range_iterator copy = *this;
+        return (copy += value);
+    }
+
+    constexpr meta_range_iterator &operator-=(const difference_type value) noexcept {
+        return (*this += -value);
+    }
+
+    constexpr meta_range_iterator operator-(const difference_type value) const noexcept {
+        return (*this + -value);
+    }
+
+    [[nodiscard]] constexpr reference operator[](const difference_type value) const noexcept {
+        return {it[value].first, Type{*ctx, it[value].second}};
+    }
+
+    [[nodiscard]] constexpr pointer operator->() const noexcept {
+        return operator*();
+    }
+
+    [[nodiscard]] constexpr reference operator*() const noexcept {
+        return operator[](0);
+    }
+
+    template<typename... Args>
+    friend constexpr std::ptrdiff_t operator-(const meta_range_iterator<Args...> &, const meta_range_iterator<Args...> &) noexcept;
+
+    template<typename... Args>
+    friend constexpr bool operator==(const meta_range_iterator<Args...> &, const meta_range_iterator<Args...> &) noexcept;
+
+    template<typename... Args>
+    friend constexpr bool operator<(const meta_range_iterator<Args...> &, const meta_range_iterator<Args...> &) noexcept;
+
+private:
+    It it;
+    const meta_ctx *ctx;
+};
+
+template<typename... Args>
+[[nodiscard]] constexpr std::ptrdiff_t operator-(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return lhs.it - rhs.it;
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator==(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return lhs.it == rhs.it;
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator!=(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return !(lhs == rhs);
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator<(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return lhs.it < rhs.it;
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator>(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return rhs < lhs;
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator<=(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return !(lhs > rhs);
+}
+
+template<typename... Args>
+[[nodiscard]] constexpr bool operator>=(const meta_range_iterator<Args...> &lhs, const meta_range_iterator<Args...> &rhs) noexcept {
+    return !(lhs < rhs);
+}
+
+} // namespace internal
+/*! @endcond */
+
+/**
+ * @brief Iterable range to use to iterate all types of meta objects.
+ * @tparam Type Type of meta objects returned.
+ * @tparam It Type of forward iterator.
+ */
+template<typename Type, typename It>
+using meta_range = iterable_adaptor<internal::meta_range_iterator<Type, It>>;
+
+} // namespace entt
+
+#endif
-- 
cgit