[static_vector][small_vector] drop usage of std::aligned_storage deprecated in C++23

Author: iboB

include/itlib/small_vector.hpp

@@ -1,11 +1,11 @@
-// itlib-small-vector v2.06
+// itlib-small-vector v2.07
 //
 // std::vector-like class with a static buffer for initial capacity
 //
 // SPDX-License-Identifier: MIT
 // MIT License:
 // Copyright(c) 2016-2018 Chobolabs Inc.
-// Copyright(c) 2020-2025 Borislav Stanimirov
+// Copyright(c) 2020-2026 Borislav Stanimirov
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files(the
@@ -29,6 +29,7 @@
 //
 //                  VERSION HISTORY
 //
+//  2.07 (2026-02-05) Drop use of deprecated std::aligned_storage
 //  2.06 (2025-03-28) Minor: Add missing header <cstdint>
 //  2.05 (2024-03-06) Minor: Return bool from shrink_to_fit
 //  2.04 (2022-04-29) Minor: Disable MSVC warning for constant conditional
@@ -153,7 +154,7 @@
 //
 #pragma once
 
-#include <type_traits>
+//#include <type_traits>
 #include <cstddef>
 #include <cstdint>
 #include <memory>
@@ -716,12 +717,12 @@ struct small_vector : private Alloc
 private:
     const T* static_begin_ptr() const
     {
-        return reinterpret_cast<const_pointer>(m_static_data + 0);
+        return &m_static_data[0].data;
     }
 
     T* static_begin_ptr()
     {
-        return reinterpret_cast<pointer>(m_static_data + 0);
+        return &m_static_data[0].data;
     }
 
     void destroy_all()
@@ -1005,7 +1006,10 @@ struct small_vector : private Alloc
     pointer m_begin; // begin either points to m_static_data or to new memory
     pointer m_end;
     size_t m_capacity;
-    typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type m_static_data[StaticCapacity];
+    struct aligned_storage {
+        T data;
+    };
+    aligned_storage m_static_data[StaticCapacity];
 };
 
 template<typename T,

include/itlib/static_vector.hpp

@@ -1,11 +1,11 @@
-// itlib-static-vector v1.07
+// itlib-static-vector v1.08
 //
 // std::vector-like class with a fixed capacity
 //
 // SPDX-License-Identifier: MIT
 // MIT License:
 // Copyright(c) 2016-2019 Chobolabs Inc.
-// Copyright(c) 2020-2023 Borislav Stanimirov
+// Copyright(c) 2020-2026 Borislav Stanimirov
 //
 // Permission is hereby granted, free of charge, to any person obtaining
 // a copy of this software and associated documentation files(the
@@ -29,6 +29,7 @@
 //
 //                  VERSION HISTORY
 //
+//  1.08 (2026-02-05) Drop use of deprecated std::aligned_storage
 //  1.07 (2023-04-06) Added resize with initializer
 //  1.06 (2023-01-17) Shim allocator arg to constructors for template code
 //                    All standard overloads of insert
@@ -289,13 +290,13 @@ struct static_vector
     const_reference at(size_type i) const
     {
         I_ITLIB_STATIC_VECTOR_BOUNDS_CHECK(i);
-        return *reinterpret_cast<const T*>(m_data + i);
+        return m_data[i].data;
     }
 
     reference at(size_type i)
     {
         I_ITLIB_STATIC_VECTOR_BOUNDS_CHECK(i);
-        return *reinterpret_cast<T*>(m_data + i);
+        return m_data[i].data;
     }
 
     const_reference operator[](size_type i) const
@@ -330,12 +331,12 @@ struct static_vector
 
     const_pointer data() const noexcept
     {
-        return reinterpret_cast<const T*>(m_data);
+        return &m_data[0].data;
     }
 
     pointer data() noexcept
     {
-        return reinterpret_cast<T*>(m_data);
+        return &m_data[0].data;;
     }
 
     // iterators
@@ -669,7 +670,10 @@ struct static_vector
         return position;
     }
 
-    typename std::aligned_storage<sizeof(T), std::alignment_of<T>::value>::type m_data[Capacity];
+    struct aligned_storage {
+        T data;
+    };
+    aligned_storage m_data[Capacity];
     size_t m_size = 0;
 };