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extern/stdcxx/4.2.1/include/rw/_streamiter.h

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+/***************************************************************************
+ *
+ * _streamiter.h - Definitions of stream iterator templates
+ *
+ * This is an internal header file used to implement the C++ Standard
+ * Library. It should never be #included directly by a program.
+ *
+ * $Id: _streamiter.h 648752 2008-04-16 17:01:56Z faridz $
+ *
+ ***************************************************************************
+ *
+ * Licensed to the Apache Software  Foundation (ASF) under one or more
+ * contributor  license agreements.  See  the NOTICE  file distributed
+ * with  this  work  for  additional information  regarding  copyright
+ * ownership.   The ASF  licenses this  file to  you under  the Apache
+ * License, Version  2.0 (the  "License"); you may  not use  this file
+ * except in  compliance with the License.   You may obtain  a copy of
+ * the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the  License is distributed on an  "AS IS" BASIS,
+ * WITHOUT  WARRANTIES OR CONDITIONS  OF ANY  KIND, either  express or
+ * implied.   See  the License  for  the  specific language  governing
+ * permissions and limitations under the License.
+ *
+ * Copyright 1994-2008 Rogue Wave Software, Inc.
+ * 
+ **************************************************************************/
+
+#ifndef _RWSTD_RW_STREAMITER_H_INCLUDED
+#define _RWSTD_RW_STREAMITER_H_INCLUDED
+
+#ifndef _RWSTD_RW_ITERBASE_H_INCLUDED
+#  include <rw/_iterbase.h>
+#endif   // _RWSTD_RW_ITERBASE_H_INCLUDED
+
+#include <iosfwd>
+
+
+_RWSTD_NAMESPACE (std) { 
+
+
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+class istream_iterator;
+
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+bool operator== (const istream_iterator<_TypeT, _CharT, _Traits, _Distance>&,
+                 const istream_iterator<_TypeT, _CharT, _Traits, _Distance>&);
+
+// 24.5.1
+#if !defined (_MSC_VER) || _MSC_VER > 1300
+
+template <class _TypeT, class _CharT = char,
+          class _Traits = char_traits<_CharT>,
+          class _Distance = _RWSTD_PTRDIFF_T>
+#else
+
+// prevent MSVC 6.0 ICE
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+
+#endif
+
+class istream_iterator
+    : public iterator<input_iterator_tag, _TypeT, _Distance,
+                      const _TypeT*, const _TypeT&>
+{
+    friend bool _RWSTD_SPECIALIZED_FRIEND (operator==)
+        (const istream_iterator&, const istream_iterator&);
+
+    typedef iterator<input_iterator_tag, _TypeT, _Distance,
+                     const _TypeT*, const _TypeT&> _C_base;
+
+public: 
+
+    typedef _CharT                                char_type;
+    typedef _Traits                               traits_type;
+    typedef basic_istream<char_type, traits_type> istream_type;
+
+    // for convenience
+    typedef _TYPENAME _C_base::value_type         value_type;
+
+    // 24.5.1.1, p1
+    istream_iterator (): _C_strm (0) { }
+
+    // 24.5.1.1, p2
+    istream_iterator (istream_type& __s)
+        : _C_strm (&__s) {
+        ++*this;
+    }
+
+    // 24.5.1.2, p1
+    const value_type& operator* () const {
+        return _C_val;
+    }
+
+    // 24.5.1.2, p2
+    _RWSTD_OPERATOR_ARROW (const value_type* operator->() const);
+
+    // 24.5.1.2, p3
+    istream_iterator& operator++ ();
+
+    // 24.5.1.2, p5
+    istream_iterator operator++ (int) {
+        istream_iterator __tmp = *this;
+        return ++*this, __tmp;
+    }
+      
+protected:
+
+    istream_type *_C_strm;   // associated stream
+    value_type    _C_val;    // last extracted value
+};
+
+
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+inline istream_iterator<_TypeT, _CharT, _Traits, _Distance>&
+istream_iterator<_TypeT, _CharT, _Traits, _Distance>::
+operator++ ()
+{
+    // incrementing an end-of-stream iterator has undefined behavior
+
+    // see also LWG issue 788
+    if (_C_strm && (*_C_strm >> _C_val).fail ())
+        _C_strm = 0;
+
+    return *this;
+}
+
+
+// 24.5.1.2, p6
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+inline bool
+operator== (const istream_iterator<_TypeT, _CharT, _Traits, _Distance>& __x,
+            const istream_iterator<_TypeT, _CharT, _Traits, _Distance>& __y)
+{
+    return __x._C_strm == __y._C_strm;
+}
+
+
+template <class _TypeT, class _CharT, class _Traits, class _Distance>
+inline bool
+operator!= (const istream_iterator<_TypeT, _CharT, _Traits, _Distance>& __x,
+            const istream_iterator<_TypeT, _CharT, _Traits, _Distance>& __y)
+{
+    return !(__x == __y);
+}
+
+
+// 24.5.2
+template <class _TypeT, class _CharT = char,
+          class _Traits = char_traits<_CharT> >
+struct ostream_iterator: iterator<output_iterator_tag, void, void, void, void>
+{
+    typedef _CharT                                char_type;
+    typedef _Traits                               traits_type;
+    typedef basic_ostream<char_type, traits_type> ostream_type;
+
+    // 24.5.2.1, p1, p2
+    ostream_iterator (ostream_type& __strm, const char_type* __s = 0) 
+      : _C_strm (&__strm), _C_str (__s) { }
+
+    // 24.5.2.2, p1
+    ostream_iterator& operator= (const _TypeT &__val) { 
+        *_C_strm << __val;
+        if (_C_str)
+            *_C_strm << _C_str;
+        return *this;
+    }
+
+    // 24.5.2.2, p2
+    ostream_iterator& operator* () {
+        return *this;
+    }
+
+    // 24.5.2.2, p3
+    ostream_iterator& operator++ () {
+        return *this;
+    }
+ 
+    ostream_iterator& operator++ (int) {
+        return *this;
+    }
+
+private:
+
+    ostream_type    *_C_strm;   // associated stream
+    const char_type *_C_str;    // string to separate values with
+};
+
+
+}   // namespace std
+
+
+#endif   // _RWSTD_RW_STREAMITER_H_INCLUDED