Reverted to old clang-format hook

Author: ClausKlein

.pre-commit-config.yaml

@@ -9,11 +9,12 @@ repos:
     -   id: check-yaml
     -   id: check-added-large-files
 
+    # TODO: keep this version, do not update!
     # Clang-format for C++
     # This brings in a portable version of clang-format.
     # See also: https://github.com/ssciwr/clang-format-wheel
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v19.1.4
+    rev: v18.1.8
     hooks:
     - id: clang-format
       types_or: [c++, c]

include/beman/optional26/detail/stl_interfaces/iterator_interface.hpp

@@ -229,7 +229,7 @@ BEMAN_OPTIONAL26_DETAIL_STL_INTERFACES_NAMESPACE_V1 {
         template <typename D = Derived>
         constexpr auto operator->() const
             noexcept(noexcept(detail::make_pointer<pointer, reference>(*std::declval<const D&>())))
-                -> decltype(detail::make_pointer<pointer, reference>(*std::declval<const D&>())) {
+            -> decltype(detail::make_pointer<pointer, reference>(*std::declval<const D&>())) {
             return detail::make_pointer<pointer, reference>(*derived());
         }
 

papers/P2988/optional.hpp

@@ -326,8 +326,8 @@ constexpr auto optional<T&>::and_then(F&& f) const {
 
 template <class T>
 template <class F>
-constexpr auto optional<T&>::transform(F&& f) const
-    -> optional<invoke_result_t<F, T&>> {
+constexpr auto
+optional<T&>::transform(F&& f) const -> optional<invoke_result_t<F, T&>> {
     using U = invoke_result_t<F, T&>;
     if (has_value()) {
         return optional<U>{invoke(std::forward<F>(f), *value_)};

papers/P2988/optional_ref.h

@@ -132,8 +132,8 @@ class optional<T&> {
     }
 
     template <class F>
-    constexpr auto transform(F&& f) const
-        -> optional<std::invoke_result_t<F, T&>> {
+    constexpr auto
+    transform(F&& f) const -> optional<std::invoke_result_t<F, T&>> {
         using U = std::invoke_result_t<F, T&>;
         return (has_value())
                    ? optional<U>{std::invoke(std::forward<F>(f), *value_)}