[0.74] std::aligned_storage is deprecated (microsoft#14255)

* std::aligned_storage is deprecated (microsoft#14253) * std::aligned_storage is deprecated * Change files * format --------- Co-authored-by: Andrew Coates <30809111+acoates-ms@users.noreply.github.com> * update change file --------- Co-authored-by: Tiago <tiagomacarios@users.noreply.github.com>
acoates-ms · Jan 8, 2025 · c15cbb7 · c15cbb7
1 parent c52e293
commit c15cbb7
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Showing 2 changed files with 13 additions and 2 deletions.
diff --git a/change/react-native-windows-94cad441-d079-4e22-bfcc-f2beb900bad1.json b/change/react-native-windows-94cad441-d079-4e22-bfcc-f2beb900bad1.json
@@ -0,0 +1,7 @@
+{
+  "type": "patch",
+  "comment": "std::aligned_storage is deprecated",
+  "packageName": "react-native-windows",
+  "email": "30809111+acoates-ms@users.noreply.github.com",
+  "dependentChangeType": "patch"
+}
diff --git a/vnext/Microsoft.ReactNative.Cxx/JSI/JsiAbiApi.h b/vnext/Microsoft.ReactNative.Cxx/JSI/JsiAbiApi.h
@@ -283,7 +283,9 @@ struct JsiAbiRuntime : facebook::jsi::Runtime {
     ~ValueRef() noexcept;
     operator facebook::jsi::Value const &() const noexcept;
 
-    using StoreType = std::aligned_storage_t<sizeof(DataPointerValue)>;
+    struct alignas(std::max_align_t) StoreType {
+      std::byte buffer[sizeof(DataPointerValue)];
+    };
     static void InitValueRef(JsiValueRef const &data, facebook::jsi::Value *value, StoreType *store) noexcept;
 
    private:
@@ -307,7 +309,9 @@ struct JsiAbiRuntime : facebook::jsi::Runtime {
     ~PropNameIDRef() noexcept;
     operator facebook::jsi::PropNameID const &() const noexcept;
 
-    using StoreType = std::aligned_storage_t<sizeof(DataPointerValue)>;
+    struct alignas(std::max_align_t) StoreType {
+      std::byte buffer[sizeof(DataPointerValue)];
+    };
 
    private:
     StoreType m_pointerStore{};