[any.class, optional.optional] Add missing "namespace std" around class definitions.

Author: tkoeppe

source/utilities.tex

@@ -2189,7 +2189,8 @@
 \indexlibrary{\idxcode{optional}}%
 \indexlibrarymember{value_type}{optional}%
 \begin{codeblock}
-template<class T>
+namespace std {
+  template<class T>
   class optional {
   public:
     using value_type = T;
@@ -2246,10 +2247,12 @@
     void reset() noexcept;
 
   private:
-    T *val; // \expos
+    T *val;         // \expos
   };
 
-template<class T> optional(T) -> optional<T>;
+  template<class T>
+    optional(T) -> optional<T>;
+}
 \end{codeblock}
 
 \pnum
@@ -5059,41 +5062,45 @@
 \rSec2[any.class]{Class \tcode{any}}
 
 \begin{codeblock}
-class any {
-public:
-  // \ref{any.cons}, construction and destruction
-  constexpr any() noexcept;
+namespace std {
+  class any {
+  public:
+    // \ref{any.cons}, construction and destruction
+    constexpr any() noexcept;
 
-  any(const any& other);
-  any(any&& other) noexcept;
+    any(const any& other);
+    any(any&& other) noexcept;
 
-  template<class T> any(T&& value);
+    template<class T>
+      any(T&& value);
 
-  template<class T, class... Args>
-    explicit any(in_place_type_t<T>, Args&&...);
-  template<class T, class U, class... Args>
-    explicit any(in_place_type_t<T>, initializer_list<U>, Args&&...);
+    template<class T, class... Args>
+      explicit any(in_place_type_t<T>, Args&&...);
+    template<class T, class U, class... Args>
+      explicit any(in_place_type_t<T>, initializer_list<U>, Args&&...);
 
-  ~any();
+    ~any();
 
-  // \ref{any.assign}, assignments
-  any& operator=(const any& rhs);
-  any& operator=(any&& rhs) noexcept;
+    // \ref{any.assign}, assignments
+    any& operator=(const any& rhs);
+    any& operator=(any&& rhs) noexcept;
 
-  template<class T> any& operator=(T&& rhs);
+    template<class T>
+      any& operator=(T&& rhs);
 
-  // \ref{any.modifiers}, modifiers
-  template<class T, class... Args>
-    decay_t<T>& emplace(Args&& ...);
-  template<class T, class U, class... Args>
-    decay_t<T>& emplace(initializer_list<U>, Args&&...);
-  void reset() noexcept;
-  void swap(any& rhs) noexcept;
+    // \ref{any.modifiers}, modifiers
+    template<class T, class... Args>
+      decay_t<T>& emplace(Args&& ...);
+    template<class T, class U, class... Args>
+      decay_t<T>& emplace(initializer_list<U>, Args&&...);
+    void reset() noexcept;
+    void swap(any& rhs) noexcept;
 
-  // \ref{any.observers}, observers
-  bool has_value() const noexcept;
-  const type_info& type() const noexcept;
-};
+    // \ref{any.observers}, observers
+    bool has_value() const noexcept;
+    const type_info& type() const noexcept;
+  };
+}
 \end{codeblock}
 
 \pnum