2 files changed, 9 insertions, 85 deletions

diff --git a/src/common/alignment.h b/src/common/alignment.h
index b37044bb6..ef4d6f896 100644
--- a/src/common/alignment.h
+++ b/src/common/alignment.h
@@ -3,7 +3,7 @@
 #pragma once
 
 #include <cstddef>
-#include <memory>
+#include <new>
 #include <type_traits>
 
 namespace Common {
@@ -54,66 +54,28 @@ public:
     using size_type = std::size_t;
     using difference_type = std::ptrdiff_t;
 
-    using pointer = T*;
-    using const_pointer = const T*;
-
-    using reference = T&;
-    using const_reference = const T&;
-
     using propagate_on_container_copy_assignment = std::true_type;
     using propagate_on_container_move_assignment = std::true_type;
     using propagate_on_container_swap = std::true_type;
     using is_always_equal = std::true_type;
 
-public:
     constexpr AlignmentAllocator() noexcept = default;
 
     template <typename T2>
     constexpr AlignmentAllocator(const AlignmentAllocator<T2, Align>&) noexcept {}
 
-    pointer address(reference r) noexcept {
-        return std::addressof(r);
-    }
-
-    const_pointer address(const_reference r) const noexcept {
-        return std::addressof(r);
-    }
-
-    pointer allocate(size_type n) {
-        return static_cast<pointer>(::operator new (n, std::align_val_t{Align}));
-    }
-
-    void deallocate(pointer p, size_type) {
-        ::operator delete (p, std::align_val_t{Align});
+    T* allocate(size_type n) {
+        return static_cast<T*>(::operator new (n * sizeof(T), std::align_val_t{Align}));
     }
 
-    void construct(pointer p, const value_type& wert) {
-        new (p) value_type(wert);
-    }
-
-    void destroy(pointer p) {
-        p->~value_type();
-    }
-
-    size_type max_size() const noexcept {
-        return size_type(-1) / sizeof(value_type);
+    void deallocate(T* p, size_type n) {
+        ::operator delete (p, n * sizeof(T), std::align_val_t{Align});
     }
 
     template <typename T2>
     struct rebind {
         using other = AlignmentAllocator<T2, Align>;
     };
-
-    bool operator!=(const AlignmentAllocator<T, Align>& other) const noexcept {
-        return !(*this == other);
-    }
-
-    // Returns true if and only if storage allocated from *this
-    // can be deallocated from other, and vice versa.
-    // Always returns true for stateless allocators.
-    bool operator==(const AlignmentAllocator<T, Align>& other) const noexcept {
-        return true;
-    }
 };
 
 } // namespace Common
diff --git a/src/common/swap.h b/src/common/swap.h
index 71932c2bb..7665942a2 100644
--- a/src/common/swap.h
+++ b/src/common/swap.h
@@ -17,43 +17,14 @@
 
 #pragma once
 
-#include <type_traits>
-
 #if defined(_MSC_VER)
 #include <cstdlib>
 #endif
+#include <bit>
 #include <cstring>
+#include <type_traits>
 #include "common/common_types.h"
 
-// GCC
-#ifdef __GNUC__
-
-#if __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__) && !defined(COMMON_LITTLE_ENDIAN)
-#define COMMON_LITTLE_ENDIAN 1
-#elif __BYTE_ORDER__ && (__BYTE_ORDER__ == __ORDER_BIG_ENDIAN__) && !defined(COMMON_BIG_ENDIAN)
-#define COMMON_BIG_ENDIAN 1
-#endif
-
-// LLVM/clang
-#elif defined(__clang__)
-
-#if __LITTLE_ENDIAN__ && !defined(COMMON_LITTLE_ENDIAN)
-#define COMMON_LITTLE_ENDIAN 1
-#elif __BIG_ENDIAN__ && !defined(COMMON_BIG_ENDIAN)
-#define COMMON_BIG_ENDIAN 1
-#endif
-
-// MSVC
-#elif defined(_MSC_VER) && !defined(COMMON_BIG_ENDIAN) && !defined(COMMON_LITTLE_ENDIAN)
-
-#define COMMON_LITTLE_ENDIAN 1
-#endif
-
-// Worst case, default to little endian.
-#if !COMMON_BIG_ENDIAN && !COMMON_LITTLE_ENDIAN
-#define COMMON_LITTLE_ENDIAN 1
-#endif
-
 namespace Common {
 
 #ifdef _MSC_VER
@@ -675,17 +646,8 @@ struct AddEndian<T, SwapTag> {
 };
 
 // Alias LETag/BETag as KeepTag/SwapTag depending on the system
-#if COMMON_LITTLE_ENDIAN
-
-using LETag = KeepTag;
-using BETag = SwapTag;
-
-#else
-
-using BETag = KeepTag;
-using LETag = SwapTag;
-
-#endif
+using LETag = std::conditional_t<std::endian::native == std::endian::little, KeepTag, SwapTag>;
+using BETag = std::conditional_t<std::endian::native == std::endian::big, KeepTag, SwapTag>;
 
 // Aliases for LE types
 using u16_le = AddEndian<u16, LETag>::type;