1/*
2 * Copyright (c) 1998
3 * Silicon Graphics Computer Systems, Inc.
4 *
5 * Copyright (c) 1999
6 * Boris Fomitchev
7 *
8 * This material is provided "as is", with absolutely no warranty expressed
9 * or implied. Any use is at your own risk.
10 *
11 * Permission to use or copy this software for any purpose is hereby granted
12 * without fee, provided the above notices are retained on all copies.
13 * Permission to modify the code and to distribute modified code is granted,
14 * provided the above notices are retained, and a notice that the code was
15 * modified is included with the above copyright notice.
16 *
17 */
18
19#ifndef _STLP_BITSET
20
21// This implementation of bitset<> has a second template parameter,
22// _WordT, which defaults to unsigned long.  *YOU SHOULD NOT USE
23// THIS FEATURE*.  It is experimental, and it may be removed in
24// future releases.
25
26// A bitset of size N, using words of type _WordT, will have
27// N % (sizeof(_WordT) * CHAR_BIT) unused bits.  (They are the high-
28// order bits in the highest word.)  It is a class invariant
29// of class bitset<> that those unused bits are always zero.
30
31// Most of the actual code isn't contained in bitset<> itself, but in the
32// base class _Base_bitset.  The base class works with whole words, not with
33// individual bits.  This allows us to specialize _Base_bitset for the
34// important special case where the bitset is only a single word.
35
36// The C++ standard does not define the precise semantics of operator[].
37// In this implementation the const version of operator[] is equivalent
38// to test(), except that it does no range checking.  The non-const version
39// returns a reference to a bit, again without doing any range checking.
40
41#ifndef _STLP_OUTERMOST_HEADER_ID
42#  define _STLP_OUTERMOST_HEADER_ID 0x2
43#  include <stl/_prolog.h>
44#  define _STLP_BITSET
45#endif
46
47#if (_STLP_OUTERMOST_HEADER_ID == 0x2)
48#  ifndef _STLP_INTERNAL_BITSET
49#    include <stl/_bitset.h>
50#  endif
51#endif
52
53#if (_STLP_OUTERMOST_HEADER_ID != 0x2) || defined (_STLP_IMPORT_VENDOR_STD)
54#  if defined (_STLP_HAS_INCLUDE_NEXT)
55#    include_next <bitset>
56#  else
57#    include _STLP_NATIVE_HEADER(bitset)
58#  endif
59#endif
60
61#if (_STLP_OUTERMOST_HEADER_ID == 0x2 )
62#  include <stl/_epilog.h>
63#  undef _STLP_OUTERMOST_HEADER_ID
64#endif
65
66#endif /* _STLP_BITSET */
67
68// Local Variables:
69// mode:C++
70// End:
71