⬆️ Update stdx

Problem:
- LLVM18 clang-tidy flags `handled` as able to be declared `const`. This is
  wrong, but what we're actually doing here is better expressed as
  `transform_reduce` on the bitset.

Solution:
- Use `transform_reduce`.

Note:
- `transform_reduce` is the operation here because we do not want to shortcut
  handling the message. `any_of` would be correct for that use case.

Author: elbeno

CMakeLists.txt

@@ -25,7 +25,7 @@ include(cmake/string_catalog.cmake)
 add_versioned_package("gh:boostorg/mp11#boost-1.83.0")
 fmt_recipe(10.2.1)
 add_versioned_package("gh:intel/cpp-baremetal-concurrency#7c5b26c")
-add_versioned_package("gh:intel/cpp-std-extensions#2834680")
+add_versioned_package("gh:intel/cpp-std-extensions#37cc9c5")
 add_versioned_package("gh:intel/cpp-baremetal-senders-and-receivers#73d95bc")
 
 set(GEN_STR_CATALOG

include/msg/detail/indexed_handler_common.hpp

@@ -7,6 +7,7 @@
 #include <stdx/compiler.hpp>
 #include <stdx/ranges.hpp>
 
+#include <functional>
 #include <iterator>
 #include <type_traits>
 #include <utility>
@@ -49,9 +50,9 @@ struct indexed_handler : handler_interface<MsgBase, ExtraCallbackArgs...> {
     handle(MsgBase const &msg, ExtraCallbackArgs... args) const -> bool final {
         auto const callback_candidates = index(msg);
 
-        bool handled{};
-        for_each([&](auto i) { handled |= callback_entries[i](msg, args...); },
-                 callback_candidates);
+        bool const handled = transform_reduce(
+            [&](auto i) -> bool { return callback_entries[i](msg, args...); },
+            std::logical_or{}, false, callback_candidates);
 
         if (not handled) {
             CIB_ERROR("None of the registered callbacks claimed this message.");