|
sl@0
|
1 |
// Copyright (C) 2005, Fernando Luis Cacciola Carballal.
|
|
sl@0
|
2 |
//
|
|
sl@0
|
3 |
// Use, modification, and distribution is subject to the Boost Software
|
|
sl@0
|
4 |
// License, Version 1.0. (See accompanying file LICENSE_1_0.txt or copy at
|
|
sl@0
|
5 |
// http://www.boost.org/LICENSE_1_0.txt)
|
|
sl@0
|
6 |
//
|
|
sl@0
|
7 |
// See http://www.boost.org/lib/optional for documentation.
|
|
sl@0
|
8 |
//
|
|
sl@0
|
9 |
// You are welcome to contact the author at:
|
|
sl@0
|
10 |
// fernando_cacciola@hotmail.com
|
|
sl@0
|
11 |
//
|
|
sl@0
|
12 |
#ifndef BOOST_OPTIONAL_OPTIONAL_IO_FLC_19NOV2002_HPP
|
|
sl@0
|
13 |
#define BOOST_OPTIONAL_OPTIONAL_IO_FLC_19NOV2002_HPP
|
|
sl@0
|
14 |
|
|
sl@0
|
15 |
#if defined __GNUC__
|
|
sl@0
|
16 |
# if (__GNUC__ == 2 && __GNUC_MINOR__ <= 97)
|
|
sl@0
|
17 |
# define BOOST_OPTIONAL_NO_TEMPLATED_STREAMS
|
|
sl@0
|
18 |
# endif
|
|
sl@0
|
19 |
#endif // __GNUC__
|
|
sl@0
|
20 |
|
|
sl@0
|
21 |
#if defined BOOST_OPTIONAL_NO_TEMPLATED_STREAMS
|
|
sl@0
|
22 |
# include <iostream>
|
|
sl@0
|
23 |
#else
|
|
sl@0
|
24 |
# include <istream>
|
|
sl@0
|
25 |
# include <ostream>
|
|
sl@0
|
26 |
#endif
|
|
sl@0
|
27 |
|
|
sl@0
|
28 |
|
|
sl@0
|
29 |
#include "boost/optional/optional.hpp"
|
|
sl@0
|
30 |
#include "boost/utility/value_init.hpp"
|
|
sl@0
|
31 |
|
|
sl@0
|
32 |
namespace boost
|
|
sl@0
|
33 |
{
|
|
sl@0
|
34 |
|
|
sl@0
|
35 |
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
sl@0
|
36 |
template<class T>
|
|
sl@0
|
37 |
inline std::ostream& operator<<(std::ostream& out, optional<T> const& v)
|
|
sl@0
|
38 |
#else
|
|
sl@0
|
39 |
template<class CharType, class CharTrait, class T>
|
|
sl@0
|
40 |
inline
|
|
sl@0
|
41 |
std::basic_ostream<CharType, CharTrait>&
|
|
sl@0
|
42 |
operator<<(std::basic_ostream<CharType, CharTrait>& out, optional<T> const& v)
|
|
sl@0
|
43 |
#endif
|
|
sl@0
|
44 |
{
|
|
sl@0
|
45 |
if ( out.good() )
|
|
sl@0
|
46 |
{
|
|
sl@0
|
47 |
if ( !v )
|
|
sl@0
|
48 |
out << "--" ;
|
|
sl@0
|
49 |
else out << ' ' << *v ;
|
|
sl@0
|
50 |
}
|
|
sl@0
|
51 |
|
|
sl@0
|
52 |
return out;
|
|
sl@0
|
53 |
}
|
|
sl@0
|
54 |
|
|
sl@0
|
55 |
#if defined (BOOST_NO_TEMPLATED_STREAMS)
|
|
sl@0
|
56 |
template<class T>
|
|
sl@0
|
57 |
inline std::istream& operator>>(std::istream& in, optional<T>& v)
|
|
sl@0
|
58 |
#else
|
|
sl@0
|
59 |
template<class CharType, class CharTrait, class T>
|
|
sl@0
|
60 |
inline
|
|
sl@0
|
61 |
std::basic_istream<CharType, CharTrait>&
|
|
sl@0
|
62 |
operator>>(std::basic_istream<CharType, CharTrait>& in, optional<T>& v)
|
|
sl@0
|
63 |
#endif
|
|
sl@0
|
64 |
{
|
|
sl@0
|
65 |
if ( in.good() )
|
|
sl@0
|
66 |
{
|
|
sl@0
|
67 |
int d = in.get();
|
|
sl@0
|
68 |
if ( d == ' ' )
|
|
sl@0
|
69 |
{
|
|
sl@0
|
70 |
T x ;
|
|
sl@0
|
71 |
in >> x;
|
|
sl@0
|
72 |
v = x ;
|
|
sl@0
|
73 |
}
|
|
sl@0
|
74 |
else
|
|
sl@0
|
75 |
v = optional<T>() ;
|
|
sl@0
|
76 |
}
|
|
sl@0
|
77 |
|
|
sl@0
|
78 |
return in;
|
|
sl@0
|
79 |
}
|
|
sl@0
|
80 |
|
|
sl@0
|
81 |
} // namespace boost
|
|
sl@0
|
82 |
|
|
sl@0
|
83 |
#endif
|
|
sl@0
|
84 |
|