kicad/include/boost/smart_ptr/detail/operator_bool.hpp

57 lines
1.4 KiB
C++

// This header intentionally has no include guards.
//
// Copyright (c) 2001-2009 Peter Dimov
//
// Distributed under the Boost Software License, Version 1.0.
// See accompanying file LICENSE_1_0.txt or copy at
// http://www.boost.org/LICENSE_1_0.txt
#if ( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, < 0x570) ) || defined(__CINT__)
operator bool () const
{
return px != 0;
}
#elif defined( _MANAGED )
static void unspecified_bool( this_type*** )
{
}
typedef void (*unspecified_bool_type)( this_type*** );
operator unspecified_bool_type() const // never throws
{
return px == 0? 0: unspecified_bool;
}
#elif \
( defined(__MWERKS__) && BOOST_WORKAROUND(__MWERKS__, < 0x3200) ) || \
( defined(__GNUC__) && (__GNUC__ * 100 + __GNUC_MINOR__ < 304) ) || \
( defined(__SUNPRO_CC) && BOOST_WORKAROUND(__SUNPRO_CC, <= 0x590) )
typedef T * (this_type::*unspecified_bool_type)() const;
operator unspecified_bool_type() const // never throws
{
return px == 0? 0: &this_type::get;
}
#else
typedef T * this_type::*unspecified_bool_type;
operator unspecified_bool_type() const // never throws
{
return px == 0? 0: &this_type::px;
}
#endif
// operator! is redundant, but some compilers need it
bool operator! () const // never throws
{
return px == 0;
}