From 4b19c29a29621853a858137e51ea2814e784bf83 Mon Sep 17 00:00:00 2001
From: MihailRis <mexaruc@gmail.com>
Date: Mon, 13 Oct 2025 23:34:56 +0300
Subject: [PATCH] add util::span

---
 src/util/span.hpp | 42 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 src/util/span.hpp

diff --git a/src/util/span.hpp b/src/util/span.hpp
new file mode 100644
index 00000000..a9ab79b2
--- /dev/null
+++ b/src/util/span.hpp
@@ -0,0 +1,42 @@
+#pragma once
+
+#include <stdexcept>
+
+namespace util {
+    template <typename T>
+    class span {
+    public:
+        constexpr span(const T* ptr, size_t length)
+         : ptr(ptr), length(length) {}
+
+        const T& operator[](size_t index) const {
+            return ptr[index];
+        }
+
+        const T& at(size_t index) const {
+            if (index >= length) {
+                throw std::out_of_range();
+            }
+            return ptr[index];
+        }
+
+        auto begin() const {
+            return ptr;
+        }
+
+        auto end() const {
+            return ptr + length;
+        }
+
+        const T* data() const {
+            return ptr;
+        }
+
+        size_t size() const {
+            return length;
+        }
+    private:
+        const T* ptr;
+        size_t length;
+    };
+}