From 87ff652a07ae083c160678ef6c473569ff140034 Mon Sep 17 00:00:00 2001
From: Beman Dawes <bdawes@acm.org>
Date: Mon, 13 Nov 2006 22:10:57 +0000
Subject: [PATCH] move to namespace detail

[SVN r36027]
---
 include/boost/detail/identifier.hpp | 111 ++++++++++++++--------------
 1 file changed, 57 insertions(+), 54 deletions(-)

diff --git a/include/boost/detail/identifier.hpp b/include/boost/detail/identifier.hpp
index dee4bef..688a664 100644
--- a/include/boost/detail/identifier.hpp
+++ b/include/boost/detail/identifier.hpp
@@ -16,71 +16,74 @@
 
 namespace boost
 {
-  //  class template identifier  ---------------------------------------------//
-
-  //  Always used as a base class so that different instantiations result in
-  //  different class types even if instantiated with the same value type T.
-
-  //  Expected usage is that T is often an integer type, best passed by
-  //  value. There is no reason why T can't be a possibly larger class such as
-  //  std::string, best passed by const reference.
-
-  //  This implementation uses pass by value, based on expected common uses.
-
-  template <typename T, typename D>
-  class identifier
+  namespace detail
   {
-  public:
-    typedef T value_type;
+    //  class template identifier  ---------------------------------------------//
 
-    const value_type value() const           { return m_value; }
-    void  assign( value_type v )             { m_value = v; }
+    //  Always used as a base class so that different instantiations result in
+    //  different class types even if instantiated with the same value type T.
 
-    bool operator==( const D & rhs ) const   { return m_value == rhs.m_value; }
-    bool operator!=( const D & rhs ) const   { return m_value != rhs.m_value; }
-    bool operator< ( const D & rhs ) const   { return m_value <  rhs.m_value; }
-    bool operator<=( const D & rhs ) const   { return m_value <= rhs.m_value; }
-    bool operator> ( const D & rhs ) const   { return m_value >  rhs.m_value; }
-    bool operator>=( const D & rhs ) const   { return m_value >= rhs.m_value; }
+    //  Expected usage is that T is often an integer type, best passed by
+    //  value. There is no reason why T can't be a possibly larger class such as
+    //  std::string, best passed by const reference.
 
-    typedef void (*unspecified_bool_type)(D); // without the D, unspecified_bool_type 
-    static void unspecified_bool_true(D){}    // conversion allows relational operators
-                                              // between different identifier types
+    //  This implementation uses pass by value, based on expected common uses.
 
-    operator unspecified_bool_type() const   { return m_value == value_type() ? 0 : unspecified_bool_true; }
-    bool operator!() const                   { return m_value == value_type(); }
+    template <typename T, typename D>
+    class identifier
+    {
+    public:
+      typedef T value_type;
 
-  // constructors are protected so that class can only be used as a base class
-  protected:
-    identifier()                             {}
-    explicit identifier( value_type v )      : m_value(v) {}
+      const value_type value() const           { return m_value; }
+      void  assign( value_type v )             { m_value = v; }
 
-#if !defined(BOOST_MSVC) || BOOST_MSVC > 1300  // 1300 == VC++ 7.0 bug workaround
-  private:
-#endif
-    T m_value;
-  };
+      bool operator==( const D & rhs ) const   { return m_value == rhs.m_value; }
+      bool operator!=( const D & rhs ) const   { return m_value != rhs.m_value; }
+      bool operator< ( const D & rhs ) const   { return m_value <  rhs.m_value; }
+      bool operator<=( const D & rhs ) const   { return m_value <= rhs.m_value; }
+      bool operator> ( const D & rhs ) const   { return m_value >  rhs.m_value; }
+      bool operator>=( const D & rhs ) const   { return m_value >= rhs.m_value; }
 
-#ifndef BOOST_NO_SFINAE
+      typedef void (*unspecified_bool_type)(D); // without the D, unspecified_bool_type 
+      static void unspecified_bool_true(D){}    // conversion allows relational operators
+                                                // between different identifier types
 
-  template <class Ostream, class Id>
-    typename enable_if< is_base_of< identifier< typename Id::value_type, Id >, Id >, 
-      Ostream & >::type operator<<( Ostream & os, const Id & id )
-  {
-    return os << id.value();
-  }
+      operator unspecified_bool_type() const   { return m_value == value_type() ? 0 : unspecified_bool_true; }
+      bool operator!() const                   { return m_value == value_type(); }
 
-  template <class Istream, class Id>
-    typename enable_if< is_base_of< identifier< typename Id::value_type, Id >, Id >, 
-      Istream & >::type operator>>( Istream & is, Id & id )
-  {
-    typename Id::value_type v;
-    is >> v;
-    id.value( v );
-    return is;
-  }
-#endif 
+    // constructors are protected so that class can only be used as a base class
+    protected:
+      identifier()                             {}
+      explicit identifier( value_type v )      : m_value(v) {}
 
+  #if !defined(BOOST_MSVC) || BOOST_MSVC > 1300  // 1300 == VC++ 7.0 bug workaround
+    private:
+  #endif
+      T m_value;
+    };
+
+  //#ifndef BOOST_NO_SFINAE
+
+  //  template <class Ostream, class Id>
+  //    typename enable_if< is_base_of< identifier< typename Id::value_type, Id >, Id >, 
+  //      Ostream & >::type operator<<( Ostream & os, const Id & id )
+  //  {
+  //    return os << id.value();
+  //  }
+
+  //  template <class Istream, class Id>
+  //    typename enable_if< is_base_of< identifier< typename Id::value_type, Id >, Id >, 
+  //      Istream & >::type operator>>( Istream & is, Id & id )
+  //  {
+  //    typename Id::value_type v;
+  //    is >> v;
+  //    id.value( v );
+  //    return is;
+  //  }
+  //#endif
+
+  } // namespace detail
 } // namespace boost
 
 #endif // BOOST_IDENTIFIER_HPP