[libcxx-commits] [libcxx] [libc++] Make __is_std_ templates variable templates (PR #150590)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions ,h -- libcxx/include/__expected/expected.h libcxx/include/__expected/unexpected.h libcxx/include/optional libcxx/include/span --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/libcxx/include/__expected/expected.h b/libcxx/include/__expected/expected.h
index 12f097780..d366245b8 100644
--- a/libcxx/include/__expected/expected.h
+++ b/libcxx/include/__expected/expected.h
@@ -1824,8 +1824,8 @@ public:
   template <class _Func>
   _LIBCPP_HIDE_FROM_ABI constexpr auto transform_error(_Func&& __f) & {
     using _Gp = remove_cv_t<invoke_result_t<_Func, _Err&>>;
-    static_assert(__valid_std_unexpected<_Gp>,
-                  "The result of f(error()) must be a valid template argument for unexpected");
+    static_assert(
+        __valid_std_unexpected<_Gp>, "The result of f(error()) must be a valid template argument for unexpected");
     if (has_value()) {
       return expected<_Tp, _Gp>();
     }
@@ -1835,8 +1835,8 @@ public:
   template <class _Func>
   _LIBCPP_HIDE_FROM_ABI constexpr auto transform_error(_Func&& __f) const& {
     using _Gp = remove_cv_t<invoke_result_t<_Func, const _Err&>>;
-    static_assert(__valid_std_unexpected<_Gp>,
-                  "The result of f(error()) must be a valid template argument for unexpected");
+    static_assert(
+        __valid_std_unexpected<_Gp>, "The result of f(error()) must be a valid template argument for unexpected");
     if (has_value()) {
       return expected<_Tp, _Gp>();
     }

``````````

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https://github.com/llvm/llvm-project/pull/150590