author | raptorbot <raptorbot@systemstesthead.symbian.intra> |
Mon, 18 Jan 2010 17:03:32 +0000 | |
branch | wip |
changeset 132 | 2022a4abb126 |
parent 0 | 044383f39525 |
permissions | -rw-r--r-- |
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/* boost integer_traits.hpp header file |
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* |
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* Copyright Jens Maurer 2000 |
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* Distributed under the Boost Software License, Version 1.0. (See |
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* accompanying file LICENSE_1_0.txt or copy at |
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* http://www.boost.org/LICENSE_1_0.txt) |
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* |
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* $Id: integer_traits.hpp 32576 2006-02-05 10:19:42Z johnmaddock $ |
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* |
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* Idea by Beman Dawes, Ed Brey, Steve Cleary, and Nathan Myers |
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*/ |
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// See http://www.boost.org/libs/integer for documentation. |
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#ifndef BOOST_INTEGER_TRAITS_HPP |
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#define BOOST_INTEGER_TRAITS_HPP |
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#include <boost/config.hpp> |
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#include <boost/limits.hpp> |
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|
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// These are an implementation detail and not part of the interface |
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#include <limits.h> |
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// we need wchar.h for WCHAR_MAX/MIN but not all platforms provide it, |
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// and some may have <wchar.h> but not <cwchar> ... |
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#if !defined(BOOST_NO_INTRINSIC_WCHAR_T) && (!defined(BOOST_NO_CWCHAR) || defined(sun) || defined(__sun) || defined(__QNX__)) |
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#include <wchar.h> |
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#endif |
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namespace boost { |
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template<class T> |
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class integer_traits : public std::numeric_limits<T> |
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{ |
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public: |
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BOOST_STATIC_CONSTANT(bool, is_integral = false); |
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}; |
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namespace detail { |
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template<class T, T min_val, T max_val> |
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class integer_traits_base |
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{ |
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public: |
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BOOST_STATIC_CONSTANT(bool, is_integral = true); |
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BOOST_STATIC_CONSTANT(T, const_min = min_val); |
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BOOST_STATIC_CONSTANT(T, const_max = max_val); |
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}; |
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#ifndef BOOST_NO_INCLASS_MEMBER_INITIALIZATION |
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// A definition is required even for integral static constants |
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template<class T, T min_val, T max_val> |
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const bool integer_traits_base<T, min_val, max_val>::is_integral; |
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template<class T, T min_val, T max_val> |
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const T integer_traits_base<T, min_val, max_val>::const_min; |
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template<class T, T min_val, T max_val> |
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const T integer_traits_base<T, min_val, max_val>::const_max; |
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#endif |
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} // namespace detail |
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template<> |
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class integer_traits<bool> |
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: public std::numeric_limits<bool>, |
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public detail::integer_traits_base<bool, false, true> |
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{ }; |
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template<> |
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class integer_traits<char> |
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: public std::numeric_limits<char>, |
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public detail::integer_traits_base<char, CHAR_MIN, CHAR_MAX> |
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{ }; |
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template<> |
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class integer_traits<signed char> |
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: public std::numeric_limits<signed char>, |
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public detail::integer_traits_base<signed char, SCHAR_MIN, SCHAR_MAX> |
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{ }; |
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template<> |
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class integer_traits<unsigned char> |
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: public std::numeric_limits<unsigned char>, |
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public detail::integer_traits_base<unsigned char, 0, UCHAR_MAX> |
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{ }; |
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#ifndef BOOST_NO_INTRINSIC_WCHAR_T |
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template<> |
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class integer_traits<wchar_t> |
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: public std::numeric_limits<wchar_t>, |
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// Don't trust WCHAR_MIN and WCHAR_MAX with Mac OS X's native |
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// library: they are wrong! |
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#if defined(WCHAR_MIN) && defined(WCHAR_MAX) && !defined(__APPLE__) |
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public detail::integer_traits_base<wchar_t, WCHAR_MIN, WCHAR_MAX> |
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#elif defined(__BORLANDC__) || defined(__CYGWIN__) || defined(__MINGW32__) || (defined(__BEOS__) && defined(__GNUC__)) |
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// No WCHAR_MIN and WCHAR_MAX, whar_t is short and unsigned: |
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public detail::integer_traits_base<wchar_t, 0, 0xffff> |
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#elif (defined(__sgi) && (!defined(__SGI_STL_PORT) || __SGI_STL_PORT < 0x400))\ |
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|| (defined __APPLE__)\ |
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|| (defined(__OpenBSD__) && defined(__GNUC__))\ |
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|| (defined(__NetBSD__) && defined(__GNUC__))\ |
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|| (defined(__FreeBSD__) && defined(__GNUC__))\ |
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|| (defined(__DragonFly__) && defined(__GNUC__))\ |
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|| (defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 3) && !defined(__SGI_STL_PORT)) |
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// No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as int. |
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// - SGI MIPSpro with native library |
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// - gcc 3.x on HP-UX |
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// - Mac OS X with native library |
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// - gcc on FreeBSD, OpenBSD and NetBSD |
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public detail::integer_traits_base<wchar_t, INT_MIN, INT_MAX> |
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#elif defined(__hpux) && defined(__GNUC__) && (__GNUC__ == 2) && !defined(__SGI_STL_PORT) |
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// No WCHAR_MIN and WCHAR_MAX, wchar_t has the same range as unsigned int. |
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// - gcc 2.95.x on HP-UX |
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// (also, std::numeric_limits<wchar_t> appears to return the wrong values). |
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public detail::integer_traits_base<wchar_t, 0, UINT_MAX> |
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#else |
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#error No WCHAR_MIN and WCHAR_MAX present, please adjust integer_traits<> for your compiler. |
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#endif |
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{ }; |
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#endif // BOOST_NO_INTRINSIC_WCHAR_T |
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|
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template<> |
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class integer_traits<short> |
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public detail::integer_traits_base<short, SHRT_MIN, SHRT_MAX> |
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{ }; |
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template<> |
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class integer_traits<unsigned short> |
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public detail::integer_traits_base<unsigned short, 0, USHRT_MAX> |
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{ }; |
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template<> |
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class integer_traits<int> |
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: public std::numeric_limits<int>, |
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public detail::integer_traits_base<int, INT_MIN, INT_MAX> |
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{ }; |
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template<> |
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class integer_traits<unsigned int> |
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: public std::numeric_limits<unsigned int>, |
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public detail::integer_traits_base<unsigned int, 0, UINT_MAX> |
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{ }; |
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template<> |
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class integer_traits<long> |
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public detail::integer_traits_base<long, LONG_MIN, LONG_MAX> |
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{ }; |
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template<> |
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class integer_traits<unsigned long> |
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public detail::integer_traits_base<unsigned long, 0, ULONG_MAX> |
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{ }; |
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#if !defined(BOOST_NO_INTEGRAL_INT64_T) && !defined(BOOST_NO_INT64_T) |
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#if defined(ULLONG_MAX) && defined(BOOST_HAS_LONG_LONG) |
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template<> |
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class integer_traits< ::boost::long_long_type> |
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: public std::numeric_limits< ::boost::long_long_type>, |
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public detail::integer_traits_base< ::boost::long_long_type, LLONG_MIN, LLONG_MAX> |
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{ }; |
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template<> |
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class integer_traits< ::boost::ulong_long_type> |
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: public std::numeric_limits< ::boost::ulong_long_type>, |
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public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULLONG_MAX> |
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{ }; |
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#elif defined(ULONG_LONG_MAX) && defined(BOOST_HAS_LONG_LONG) |
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template<> |
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class integer_traits< ::boost::long_long_type> : public std::numeric_limits< ::boost::long_long_type>, public detail::integer_traits_base< ::boost::long_long_type, LONG_LONG_MIN, LONG_LONG_MAX>{ }; |
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template<> |
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class integer_traits< ::boost::ulong_long_type> |
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: public std::numeric_limits< ::boost::ulong_long_type>, |
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public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONG_LONG_MAX> |
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181 |
{ }; |
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#elif defined(ULONGLONG_MAX) && defined(BOOST_HAS_LONG_LONG) |
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184 |
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185 |
template<> |
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186 |
class integer_traits< ::boost::long_long_type> |
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: public std::numeric_limits< ::boost::long_long_type>, |
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188 |
public detail::integer_traits_base< ::boost::long_long_type, LONGLONG_MIN, LONGLONG_MAX> |
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{ }; |
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190 |
|
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191 |
template<> |
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192 |
class integer_traits< ::boost::ulong_long_type> |
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193 |
: public std::numeric_limits< ::boost::ulong_long_type>, |
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public detail::integer_traits_base< ::boost::ulong_long_type, 0, ULONGLONG_MAX> |
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195 |
{ }; |
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196 |
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#elif defined(_LLONG_MAX) && defined(_C2) && defined(BOOST_HAS_LONG_LONG) |
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198 |
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199 |
template<> |
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200 |
class integer_traits< ::boost::long_long_type> |
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201 |
: public std::numeric_limits< ::boost::long_long_type>, |
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202 |
public detail::integer_traits_base< ::boost::long_long_type, -_LLONG_MAX - _C2, _LLONG_MAX> |
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203 |
{ }; |
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204 |
|
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205 |
template<> |
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206 |
class integer_traits< ::boost::ulong_long_type> |
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207 |
: public std::numeric_limits< ::boost::ulong_long_type>, |
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208 |
public detail::integer_traits_base< ::boost::ulong_long_type, 0, _ULLONG_MAX> |
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209 |
{ }; |
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210 |
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211 |
#elif defined(BOOST_HAS_LONG_LONG) |
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212 |
// |
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// we have long long but no constants, this happens for example with gcc in -ansi mode, |
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214 |
// we'll just have to work out the values for ourselves (assumes 2's compliment representation): |
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215 |
// |
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216 |
template<> |
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217 |
class integer_traits< ::boost::long_long_type> |
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: public std::numeric_limits< ::boost::long_long_type>, |
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219 |
public detail::integer_traits_base< ::boost::long_long_type, (1LL << (sizeof(::boost::long_long_type) - 1)), ~(1LL << (sizeof(::boost::long_long_type) - 1))> |
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220 |
{ }; |
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221 |
|
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222 |
template<> |
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223 |
class integer_traits< ::boost::ulong_long_type> |
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224 |
: public std::numeric_limits< ::boost::ulong_long_type>, |
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225 |
public detail::integer_traits_base< ::boost::ulong_long_type, 0, ~0uLL> |
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226 |
{ }; |
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227 |
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228 |
#endif |
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229 |
#endif |
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231 |
} // namespace boost |
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#endif /* BOOST_INTEGER_TRAITS_HPP */ |
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235 |
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236 |