/usr/include/ace/iosfwd.h is in libace-dev 6.0.1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 | // -*- C++ -*-
//=============================================================================
/**
 *  @file    iosfwd.h
 *
 *  $Id: iosfwd.h 89098 2010-02-21 21:51:41Z schmidt $
 *
 *  @author Irfan Pyarali
 *
 *  This file contains the portability ugliness for the Standard C++
 *  Library.  As implementations of the "standard" emerge, this file
 *  will need to be updated.
 *
 *  This files deals with forward declaration for the stream
 *  classes.  Remember that since the new Standard C++ Library code
 *  for streams uses templates, simple forward declaration will not
 *  work.
 */
//=============================================================================
#ifndef ACE_IOSFWD_H
#define ACE_IOSFWD_H
#include /**/ "ace/pre.h"
#include /**/ "ace/config-all.h"
#if !defined (ACE_LACKS_PRAGMA_ONCE)
# pragma once
#endif /* ACE_LACKS_PRAGMA_ONCE */
#if !defined (ACE_LACKS_IOSTREAM_TOTALLY)
#if defined (__APPLE_CC__)
// Should this really be here?  dhinton
// FUZZ: disable check_for_streams_include
# include "ace/streams.h"
#endif
#if defined (ACE_HAS_STANDARD_CPP_LIBRARY)  && \
    (ACE_HAS_STANDARD_CPP_LIBRARY != 0)
# if !defined (ACE_USES_OLD_IOSTREAMS)
#   include /**/ <iosfwd>
#define ACE_HAS_CPP98_IOSTREAMS 1
# else
  // @note If these forward declarations don't work (e.g. aren't
  //       portable), we may have to include "ace/streams.h" as a last
  //       resort.  Doing so would defeat the purpose of this header,
  //       unfortunately.
  class ios;
  class streambuf;
  class istream;
  class ostream;
  class iostream;
  class filebuf;
  class ifstream;
  class ofstream;
  class fstream;
# endif /* ! ACE_USES_OLD_IOSTREAMS */
# if defined (ACE_USES_STD_NAMESPACE_FOR_STDCPP_LIB) && \
             (ACE_USES_STD_NAMESPACE_FOR_STDCPP_LIB != 0)
#   if !defined (ACE_USES_OLD_IOSTREAMS)
      // Make these available in the global name space
      using std::ios;
      using std::streambuf;
      using std::istream;
      using std::ostream;
      using std::iostream;
      using std::filebuf;
      using std::ifstream;
      using std::ofstream;
      using std::fstream;
#   endif /* ! ACE_USES_OLD_IOSTREAMS */
# endif /* ACE_USES_STD_NAMESPACE_FOR_STDCPP_LIB */
#else /* ! ACE_HAS_STANDARD_CPP_LIBRARY */
  class ios;
  class streambuf;
  class istream;
  class ostream;
  class iostream;
  class filebuf;
  class ifstream;
  class ofstream;
  class fstream;
# endif /* ! ACE_HAS_STANDARD_CPP_LIBRARY */
#include /**/ "ace/post.h"
#endif /* ACE_LACKS_IOSTREAM_TOTALLY */
#endif /* ACE_IOSFWD_H */
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