[container] unify to friend constexpr (there were few constexpr friend)

Author: hanickadot

source/containers.tex

@@ -2403,7 +2403,7 @@
     noexcept(ator_traits::propagate_on_container_swap::value ||
              ator_traits::is_always_equal::value);
 
-  constexpr friend void swap(@\placeholdernc{node-handle}@& x, @\placeholdernc{node-handle}@& y) noexcept(noexcept(x.swap(y))) {
+  friend constexpr void swap(@\placeholdernc{node-handle}@& x, @\placeholdernc{node-handle}@& y) noexcept(noexcept(x.swap(y))) {
     x.swap(y);
   }
 };
@@ -10913,11 +10913,11 @@
                           is_nothrow_move_constructible_v<T>));
     constexpr void clear() noexcept;
 
-    constexpr friend bool operator==(const inplace_vector& x,
+    friend constexpr bool operator==(const inplace_vector& x,
                                      const inplace_vector& y);
-    constexpr friend @\exposid{synth-three-way-result}@<T>
+    friend constexpr @\exposid{synth-three-way-result}@<T>
       operator<=>(const inplace_vector& x, const inplace_vector& y);
-    constexpr friend void swap(inplace_vector& x, inplace_vector& y)
+    friend constexpr void swap(inplace_vector& x, inplace_vector& y)
       noexcept(N == 0 || (is_nothrow_swappable_v<T> &&
                           is_nothrow_move_constructible_v<T>))
       { x.swap(y); }
@@ -17330,12 +17330,12 @@
     template<class K>
       constexpr pair<const_iterator, const_iterator> equal_range(const K& x) const;
 
-    constexpr friend bool operator==(const flat_map& x, const flat_map& y);
+    friend constexpr bool operator==(const flat_map& x, const flat_map& y);
 
-    constexpr friend @\exposid{synth-three-way-result}@<value_type>
+    friend constexpr @\exposid{synth-three-way-result}@<value_type>
       operator<=>(const flat_map& x, const flat_map& y);
 
-    constexpr friend void swap(flat_map& x, flat_map& y) noexcept
+    friend constexpr void swap(flat_map& x, flat_map& y) noexcept
       { x.swap(y); }
 
   private:
@@ -18494,12 +18494,12 @@
     template<class K>
       constexpr pair<const_iterator, const_iterator> equal_range(const K& x) const;
 
-    constexpr friend bool operator==(const flat_multimap& x, const flat_multimap& y);
+    friend constexpr bool operator==(const flat_multimap& x, const flat_multimap& y);
 
-    constexpr friend @\exposid{synth-three-way-result}@<value_type>
+    friend constexpr @\exposid{synth-three-way-result}@<value_type>
       operator<=>(const flat_multimap& x, const flat_multimap& y);
 
-    constexpr friend void swap(flat_multimap& x, flat_multimap& y) noexcept
+    friend constexpr void swap(flat_multimap& x, flat_multimap& y) noexcept
       { x.swap(y); }
 
   private:
@@ -19097,12 +19097,12 @@
     template<class K>
       constexpr pair<const_iterator, const_iterator> equal_range(const K& x) const;
 
-    constexpr friend bool operator==(const flat_set& x, const flat_set& y);
+    friend constexpr bool operator==(const flat_set& x, const flat_set& y);
 
-    constexpr friend @\placeholder{synth-three-way-result}@<value_type>
+    friend constexpr @\placeholder{synth-three-way-result}@<value_type>
       operator<=>(const flat_set& x, const flat_set& y);
 
-    constexpr friend void swap(flat_set& x, flat_set& y) noexcept { x.swap(y); }
+    friend constexpr void swap(flat_set& x, flat_set& y) noexcept { x.swap(y); }
 
   private:
     container_type @\exposidnc{c}@;           // \expos
@@ -19768,12 +19768,12 @@
     template<class K>
       constexpr pair<const_iterator, const_iterator> equal_range(const K& x) const;
 
-    constexpr friend bool operator==(const flat_multiset& x, const flat_multiset& y);
+    friend constexpr bool operator==(const flat_multiset& x, const flat_multiset& y);
 
     friend @\placeholder{synth-three-way-result}@<value_type>
       constexpr operator<=>(const flat_multiset& x, const flat_multiset& y);
 
-    constexpr friend void swap(flat_multiset& x, flat_multiset& y) noexcept
+    friend constexpr void swap(flat_multiset& x, flat_multiset& y) noexcept
       { x.swap(y); }
 
   private: