LWG4398 enable_nonlocking_formatter_optimization should be disabled for container adaptors

Author: eisenwave

source/containers.tex

@@ -15627,6 +15627,9 @@
   template<class charT, class T, @\libconcept{formattable}@<charT> Container>
     struct formatter<queue<T, Container>, charT>;
 
+  template<class T, class Container>
+    constexpr bool enable_nonlocking_formatter_optimization<queue<T, Container>> = false;
+
   // \ref{priority.queue}, class template \tcode{priority_queue}
   template<class T, class Container = vector<T>,
            class Compare = less<typename Container::value_type>>
@@ -15641,6 +15644,10 @@
   // \ref{container.adaptors.format}, formatter specialization for \tcode{priority_queue}
   template<class charT, class T, @\libconcept{formattable}@<charT> Container, class Compare>
     struct formatter<priority_queue<T, Container, Compare>, charT>;
+
+  template<class T, class Container, class Compare>
+    constexpr bool
+      enable_nonlocking_formatter_optimization<priority_queue<T, Container, Compare>> = false;
 }
 \end{codeblock}
 
@@ -16552,6 +16559,9 @@
   // \ref{container.adaptors.format}, formatter specialization for \tcode{stack}
   template<class charT, class T, @\libconcept{formattable}@<charT> Container>
     struct formatter<stack<T, Container>, charT>;
+
+  template<class T, class Container>
+    constexpr bool enable_nonlocking_formatter_optimization<stack<T, Container>> = false;
 }
 \end{codeblock}