source:
vendors/XIOS/current/extern/boost/include/boost/smart_ptr/detail/operator_bool.hpp
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3408
Last change on this file since 3408 was 3408, checked in by rblod, 12 years ago | |
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1 | // This header intentionally has no include guards. |
2 | // |
3 | // Copyright (c) 2001-2009 Peter Dimov |
4 | // |
5 | // Distributed under the Boost Software License, Version 1.0. |
6 | // See accompanying file LICENSE_1_0.txt or copy at |
7 | // http://www.boost.org/LICENSE_1_0.txt |
8 | |
9 | #if ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, < 0x570) ) || defined(__CINT__) |
10 | |
11 | operator bool () const |
12 | { |
13 | return px != 0; |
14 | } |
15 | |
16 | #elif defined( _MANAGED ) |
17 | |
18 | static void unspecified_bool( this_type*** ) |
19 | { |
20 | } |
21 | |
22 | typedef void (*unspecified_bool_type)( this_type*** ); |
23 | |
24 | operator unspecified_bool_type() const // never throws |
25 | { |
26 | return px == 0? 0: unspecified_bool; |
27 | } |
28 | |
29 | #elif \ |
30 | ( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \ |
31 | ( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) ) || \ |
32 | ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590) ) |
33 | |
34 | typedef T * (this_type::*unspecified_bool_type)() const; |
35 | |
36 | operator unspecified_bool_type() const // never throws |
37 | { |
38 | return px == 0? 0: &this_type::get; |
39 | } |
40 | |
41 | #else |
42 | |
43 | typedef T * this_type::*unspecified_bool_type; |
44 | |
45 | operator unspecified_bool_type() const // never throws |
46 | { |
47 | return px == 0? 0: &this_type::px; |
48 | } |
49 | |
50 | #endif |
51 | |
52 | // operator! is redundant, but some compilers need it |
53 | bool operator! () const // never throws |
54 | { |
55 | return px == 0; |
56 | } |
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