1// Boost config.hpp configuration header file ------------------------------//
2// boostinspect:ndprecated_macros -- tell the inspect tool to ignore this file
3
4// Copyright (c) 2001-2003 John Maddock
5// Copyright (c) 2001 Darin Adler
6// Copyright (c) 2001 Peter Dimov
7// Copyright (c) 2002 Bill Kempf
8// Copyright (c) 2002 Jens Maurer
9// Copyright (c) 2002-2003 David Abrahams
10// Copyright (c) 2003 Gennaro Prota
11// Copyright (c) 2003 Eric Friedman
12// Copyright (c) 2010 Eric Jourdanneau, Joel Falcou
13// Distributed under the Boost Software License, Version 1.0. (See
14// accompanying file LICENSE_1_0.txt or copy at
15// http://www.boost.org/LICENSE_1_0.txt)
16
17// See http://www.boost.org/ for most recent version.
18
19// Boost config.hpp policy and rationale documentation has been moved to
20// http://www.boost.org/libs/config/
21//
22// This file is intended to be stable, and relatively unchanging.
23// It should contain boilerplate code only - no compiler specific
24// code unless it is unavoidable - no changes unless unavoidable.
25
26#ifndef BOOST_CONFIG_SUFFIX_HPP
27#define BOOST_CONFIG_SUFFIX_HPP
28
29#if defined(__GNUC__) && (__GNUC__ >= 4)
30//
31// Some GCC-4.x versions issue warnings even when __extension__ is used,
32// so use this as a workaround:
33//
34#pragma GCC system_header
35#endif
36
37//
38// ensure that visibility macros are always defined, thus symplifying use
39//
40#ifndef BOOST_SYMBOL_EXPORT
41# define BOOST_SYMBOL_EXPORT
42#endif
43#ifndef BOOST_SYMBOL_IMPORT
44# define BOOST_SYMBOL_IMPORT
45#endif
46#ifndef BOOST_SYMBOL_VISIBLE
47# define BOOST_SYMBOL_VISIBLE
48#endif
49
50//
51// look for long long by looking for the appropriate macros in <limits.h>.
52// Note that we use limits.h rather than climits for maximal portability,
53// remember that since these just declare a bunch of macros, there should be
54// no namespace issues from this.
55//
56#if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG) \
57 && !defined(BOOST_MSVC) && !defined(__BORLANDC__)
58# include <limits.h>
59# if (defined(ULLONG_MAX) || defined(ULONG_LONG_MAX) || defined(ULONGLONG_MAX))
60# define BOOST_HAS_LONG_LONG
61# else
62# define BOOST_NO_LONG_LONG
63# endif
64#endif
65
66// GCC 3.x will clean up all of those nasty macro definitions that
67// BOOST_NO_CTYPE_FUNCTIONS is intended to help work around, so undefine
68// it under GCC 3.x.
69#if defined(__GNUC__) && (__GNUC__ >= 3) && defined(BOOST_NO_CTYPE_FUNCTIONS)
70# undef BOOST_NO_CTYPE_FUNCTIONS
71#endif
72
73//
74// Assume any extensions are in namespace std:: unless stated otherwise:
75//
76# ifndef BOOST_STD_EXTENSION_NAMESPACE
77# define BOOST_STD_EXTENSION_NAMESPACE std
78# endif
79
80//
81// If cv-qualified specializations are not allowed, then neither are cv-void ones:
82//
83# if defined(BOOST_NO_CV_SPECIALIZATIONS) \
84 && !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
85# define BOOST_NO_CV_VOID_SPECIALIZATIONS
86# endif
87
88//
89// If there is no numeric_limits template, then it can't have any compile time
90// constants either!
91//
92# if defined(BOOST_NO_LIMITS) \
93 && !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS)
94# define BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
95# define BOOST_NO_MS_INT64_NUMERIC_LIMITS
96# define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
97# endif
98
99//
100// if there is no long long then there is no specialisation
101// for numeric_limits<long long> either:
102//
103#if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG_NUMERIC_LIMITS)
104# define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
105#endif
106
107//
108// if there is no __int64 then there is no specialisation
109// for numeric_limits<__int64> either:
110//
111#if !defined(BOOST_HAS_MS_INT64) && !defined(BOOST_NO_MS_INT64_NUMERIC_LIMITS)
112# define BOOST_NO_MS_INT64_NUMERIC_LIMITS
113#endif
114
115//
116// if member templates are supported then so is the
117// VC6 subset of member templates:
118//
119# if !defined(BOOST_NO_MEMBER_TEMPLATES) \
120 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
121# define BOOST_MSVC6_MEMBER_TEMPLATES
122# endif
123
124//
125// Without partial specialization, can't test for partial specialisation bugs:
126//
127# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
128 && !defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG)
129# define BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
130# endif
131
132//
133// Without partial specialization, we can't have array-type partial specialisations:
134//
135# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
136 && !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS)
137# define BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS
138# endif
139
140//
141// Without partial specialization, std::iterator_traits can't work:
142//
143# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
144 && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
145# define BOOST_NO_STD_ITERATOR_TRAITS
146# endif
147
148//
149// Without partial specialization, partial
150// specialization with default args won't work either:
151//
152# if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
153 && !defined(BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS)
154# define BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
155# endif
156
157//
158// Without member template support, we can't have template constructors
159// in the standard library either:
160//
161# if defined(BOOST_NO_MEMBER_TEMPLATES) \
162 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
163 && !defined(BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)
164# define BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS
165# endif
166
167//
168// Without member template support, we can't have a conforming
169// std::allocator template either:
170//
171# if defined(BOOST_NO_MEMBER_TEMPLATES) \
172 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
173 && !defined(BOOST_NO_STD_ALLOCATOR)
174# define BOOST_NO_STD_ALLOCATOR
175# endif
176
177//
178// without ADL support then using declarations will break ADL as well:
179//
180#if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP) && !defined(BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL)
181# define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
182#endif
183
184//
185// Without typeid support we have no dynamic RTTI either:
186//
187#if defined(BOOST_NO_TYPEID) && !defined(BOOST_NO_RTTI)
188# define BOOST_NO_RTTI
189#endif
190
191//
192// If we have a standard allocator, then we have a partial one as well:
193//
194#if !defined(BOOST_NO_STD_ALLOCATOR)
195# define BOOST_HAS_PARTIAL_STD_ALLOCATOR
196#endif
197
198//
199// We can't have a working std::use_facet if there is no std::locale:
200//
201# if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_USE_FACET)
202# define BOOST_NO_STD_USE_FACET
203# endif
204
205//
206// We can't have a std::messages facet if there is no std::locale:
207//
208# if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_MESSAGES)
209# define BOOST_NO_STD_MESSAGES
210# endif
211
212//
213// We can't have a working std::wstreambuf if there is no std::locale:
214//
215# if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_WSTREAMBUF)
216# define BOOST_NO_STD_WSTREAMBUF
217# endif
218
219//
220// We can't have a <cwctype> if there is no <cwchar>:
221//
222# if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_CWCTYPE)
223# define BOOST_NO_CWCTYPE
224# endif
225
226//
227// We can't have a swprintf if there is no <cwchar>:
228//
229# if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_SWPRINTF)
230# define BOOST_NO_SWPRINTF
231# endif
232
233//
234// If Win32 support is turned off, then we must turn off
235// threading support also, unless there is some other
236// thread API enabled:
237//
238#if defined(BOOST_DISABLE_WIN32) && defined(_WIN32) \
239 && !defined(BOOST_DISABLE_THREADS) && !defined(BOOST_HAS_PTHREADS)
240# define BOOST_DISABLE_THREADS
241#endif
242
243//
244// Turn on threading support if the compiler thinks that it's in
245// multithreaded mode. We put this here because there are only a
246// limited number of macros that identify this (if there's any missing
247// from here then add to the appropriate compiler section):
248//
249#if (defined(__MT__) || defined(_MT) || defined(_REENTRANT) \
250 || defined(_PTHREADS) || defined(__APPLE__) || defined(__DragonFly__)) \
251 && !defined(BOOST_HAS_THREADS)
252# define BOOST_HAS_THREADS
253#endif
254
255//
256// Turn threading support off if BOOST_DISABLE_THREADS is defined:
257//
258#if defined(BOOST_DISABLE_THREADS) && defined(BOOST_HAS_THREADS)
259# undef BOOST_HAS_THREADS
260#endif
261
262//
263// Turn threading support off if we don't recognise the threading API:
264//
265#if defined(BOOST_HAS_THREADS) && !defined(BOOST_HAS_PTHREADS)\
266 && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_BETHREADS)\
267 && !defined(BOOST_HAS_MPTASKS)
268# undef BOOST_HAS_THREADS
269#endif
270
271//
272// Turn threading detail macros off if we don't (want to) use threading
273//
274#ifndef BOOST_HAS_THREADS
275# undef BOOST_HAS_PTHREADS
276# undef BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
277# undef BOOST_HAS_PTHREAD_YIELD
278# undef BOOST_HAS_PTHREAD_DELAY_NP
279# undef BOOST_HAS_WINTHREADS
280# undef BOOST_HAS_BETHREADS
281# undef BOOST_HAS_MPTASKS
282#endif
283
284//
285// If the compiler claims to be C99 conformant, then it had better
286// have a <stdint.h>:
287//
288# if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)
289# define BOOST_HAS_STDINT_H
290# ifndef BOOST_HAS_LOG1P
291# define BOOST_HAS_LOG1P
292# endif
293# ifndef BOOST_HAS_EXPM1
294# define BOOST_HAS_EXPM1
295# endif
296# endif
297
298//
299// Define BOOST_NO_SLIST and BOOST_NO_HASH if required.
300// Note that this is for backwards compatibility only.
301//
302# if !defined(BOOST_HAS_SLIST) && !defined(BOOST_NO_SLIST)
303# define BOOST_NO_SLIST
304# endif
305
306# if !defined(BOOST_HAS_HASH) && !defined(BOOST_NO_HASH)
307# define BOOST_NO_HASH
308# endif
309
310//
311// Set BOOST_SLIST_HEADER if not set already:
312//
313#if defined(BOOST_HAS_SLIST) && !defined(BOOST_SLIST_HEADER)
314# define BOOST_SLIST_HEADER <slist>
315#endif
316
317//
318// Set BOOST_HASH_SET_HEADER if not set already:
319//
320#if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_SET_HEADER)
321# define BOOST_HASH_SET_HEADER <hash_set>
322#endif
323
324//
325// Set BOOST_HASH_MAP_HEADER if not set already:
326//
327#if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_MAP_HEADER)
328# define BOOST_HASH_MAP_HEADER <hash_map>
329#endif
330
331// BOOST_HAS_ABI_HEADERS
332// This macro gets set if we have headers that fix the ABI,
333// and prevent ODR violations when linking to external libraries:
334#if defined(BOOST_ABI_PREFIX) && defined(BOOST_ABI_SUFFIX) && !defined(BOOST_HAS_ABI_HEADERS)
335# define BOOST_HAS_ABI_HEADERS
336#endif
337
338#if defined(BOOST_HAS_ABI_HEADERS) && defined(BOOST_DISABLE_ABI_HEADERS)
339# undef BOOST_HAS_ABI_HEADERS
340#endif
341
342// BOOST_NO_STDC_NAMESPACE workaround --------------------------------------//
343// Because std::size_t usage is so common, even in boost headers which do not
344// otherwise use the C library, the <cstddef> workaround is included here so
345// that ugly workaround code need not appear in many other boost headers.
346// NOTE WELL: This is a workaround for non-conforming compilers; <cstddef>
347// must still be #included in the usual places so that <cstddef> inclusion
348// works as expected with standard conforming compilers. The resulting
349// double inclusion of <cstddef> is harmless.
350
351# if defined(BOOST_NO_STDC_NAMESPACE) && defined(__cplusplus)
352# include <cstddef>
353 namespace std { using ::ptrdiff_t; using ::size_t; }
354# endif
355
356// Workaround for the unfortunate min/max macros defined by some platform headers
357
358#define BOOST_PREVENT_MACRO_SUBSTITUTION
359
360#ifndef BOOST_USING_STD_MIN
361# define BOOST_USING_STD_MIN() using std::min
362#endif
363
364#ifndef BOOST_USING_STD_MAX
365# define BOOST_USING_STD_MAX() using std::max
366#endif
367
368// BOOST_NO_STD_MIN_MAX workaround -----------------------------------------//
369
370# if defined(BOOST_NO_STD_MIN_MAX) && defined(__cplusplus)
371
372namespace std {
373 template <class _Tp>
374 inline const _Tp& min BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp& __a, const _Tp& __b) {
375 return __b < __a ? __b : __a;
376 }
377 template <class _Tp>
378 inline const _Tp& max BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp& __a, const _Tp& __b) {
379 return __a < __b ? __b : __a;
380 }
381}
382
383# endif
384
385// BOOST_STATIC_CONSTANT workaround --------------------------------------- //
386// On compilers which don't allow in-class initialization of static integral
387// constant members, we must use enums as a workaround if we want the constants
388// to be available at compile-time. This macro gives us a convenient way to
389// declare such constants.
390
391# ifdef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
392# define BOOST_STATIC_CONSTANT(type, assignment) enum { assignment }
393# else
394# define BOOST_STATIC_CONSTANT(type, assignment) static const type assignment
395# endif
396
397// BOOST_USE_FACET / HAS_FACET workaround ----------------------------------//
398// When the standard library does not have a conforming std::use_facet there
399// are various workarounds available, but they differ from library to library.
400// The same problem occurs with has_facet.
401// These macros provide a consistent way to access a locale's facets.
402// Usage:
403// replace
404// std::use_facet<Type>(loc);
405// with
406// BOOST_USE_FACET(Type, loc);
407// Note do not add a std:: prefix to the front of BOOST_USE_FACET!
408// Use for BOOST_HAS_FACET is analogous.
409
410#if defined(BOOST_NO_STD_USE_FACET)
411# ifdef BOOST_HAS_TWO_ARG_USE_FACET
412# define BOOST_USE_FACET(Type, loc) std::use_facet(loc, static_cast<Type*>(0))
413# define BOOST_HAS_FACET(Type, loc) std::has_facet(loc, static_cast<Type*>(0))
414# elif defined(BOOST_HAS_MACRO_USE_FACET)
415# define BOOST_USE_FACET(Type, loc) std::_USE(loc, Type)
416# define BOOST_HAS_FACET(Type, loc) std::_HAS(loc, Type)
417# elif defined(BOOST_HAS_STLP_USE_FACET)
418# define BOOST_USE_FACET(Type, loc) (*std::_Use_facet<Type >(loc))
419# define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
420# endif
421#else
422# define BOOST_USE_FACET(Type, loc) std::use_facet< Type >(loc)
423# define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
424#endif
425
426// BOOST_NESTED_TEMPLATE workaround ------------------------------------------//
427// Member templates are supported by some compilers even though they can't use
428// the A::template member<U> syntax, as a workaround replace:
429//
430// typedef typename A::template rebind<U> binder;
431//
432// with:
433//
434// typedef typename A::BOOST_NESTED_TEMPLATE rebind<U> binder;
435
436#ifndef BOOST_NO_MEMBER_TEMPLATE_KEYWORD
437# define BOOST_NESTED_TEMPLATE template
438#else
439# define BOOST_NESTED_TEMPLATE
440#endif
441
442// BOOST_UNREACHABLE_RETURN(x) workaround -------------------------------------//
443// Normally evaluates to nothing, unless BOOST_NO_UNREACHABLE_RETURN_DETECTION
444// is defined, in which case it evaluates to return x; Use when you have a return
445// statement that can never be reached.
446
447#ifndef BOOST_UNREACHABLE_RETURN
448# ifdef BOOST_NO_UNREACHABLE_RETURN_DETECTION
449# define BOOST_UNREACHABLE_RETURN(x) return x;
450# else
451# define BOOST_UNREACHABLE_RETURN(x)
452# endif
453#endif
454
455// BOOST_DEDUCED_TYPENAME workaround ------------------------------------------//
456//
457// Some compilers don't support the use of `typename' for dependent
458// types in deduced contexts, e.g.
459//
460// template <class T> void f(T, typename T::type);
461// ^^^^^^^^
462// Replace these declarations with:
463//
464// template <class T> void f(T, BOOST_DEDUCED_TYPENAME T::type);
465
466#ifndef BOOST_NO_DEDUCED_TYPENAME
467# define BOOST_DEDUCED_TYPENAME typename
468#else
469# define BOOST_DEDUCED_TYPENAME
470#endif
471
472#ifndef BOOST_NO_TYPENAME_WITH_CTOR
473# define BOOST_CTOR_TYPENAME typename
474#else
475# define BOOST_CTOR_TYPENAME
476#endif
477
478// long long workaround ------------------------------------------//
479// On gcc (and maybe other compilers?) long long is alway supported
480// but it's use may generate either warnings (with -ansi), or errors
481// (with -pedantic -ansi) unless it's use is prefixed by __extension__
482//
483#if defined(BOOST_HAS_LONG_LONG) && defined(__cplusplus)
484namespace boost{
485# ifdef __GNUC__
486 __extension__ typedef long long long_long_type;
487 __extension__ typedef unsigned long long ulong_long_type;
488# else
489 typedef long long long_long_type;
490 typedef unsigned long long ulong_long_type;
491# endif
492}
493#endif
494// same again for __int128:
495#if defined(BOOST_HAS_INT128) && defined(__cplusplus)
496namespace boost{
497# ifdef __GNUC__
498 __extension__ typedef __int128 int128_type;
499 __extension__ typedef unsigned __int128 uint128_type;
500# else
501 typedef __int128 int128_type;
502 typedef unsigned __int128 uint128_type;
503# endif
504}
505#endif
506// same again for __float128:
507#if defined(BOOST_HAS_FLOAT128) && defined(__cplusplus)
508namespace boost {
509# ifdef __GNUC__
510 __extension__ typedef __float128 float128_type;
511# else
512 typedef __float128 float128_type;
513# endif
514}
515#endif
516
517// BOOST_[APPEND_]EXPLICIT_TEMPLATE_[NON_]TYPE macros --------------------------//
518
519// These macros are obsolete. Port away and remove.
520
521# define BOOST_EXPLICIT_TEMPLATE_TYPE(t)
522# define BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
523# define BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
524# define BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
525
526# define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t)
527# define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
528# define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
529# define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
530
531// When BOOST_NO_STD_TYPEINFO is defined, we can just import
532// the global definition into std namespace:
533#if defined(BOOST_NO_STD_TYPEINFO) && defined(__cplusplus)
534#include <typeinfo>
535namespace std{ using ::type_info; }
536#endif
537
538// ---------------------------------------------------------------------------//
539
540//
541// Helper macro BOOST_STRINGIZE:
542// Converts the parameter X to a string after macro replacement
543// on X has been performed.
544//
545#define BOOST_STRINGIZE(X) BOOST_DO_STRINGIZE(X)
546#define BOOST_DO_STRINGIZE(X) #X
547
548//
549// Helper macro BOOST_JOIN:
550// The following piece of macro magic joins the two
551// arguments together, even when one of the arguments is
552// itself a macro (see 16.3.1 in C++ standard). The key
553// is that macro expansion of macro arguments does not
554// occur in BOOST_DO_JOIN2 but does in BOOST_DO_JOIN.
555//
556#define BOOST_JOIN( X, Y ) BOOST_DO_JOIN( X, Y )
557#define BOOST_DO_JOIN( X, Y ) BOOST_DO_JOIN2(X,Y)
558#define BOOST_DO_JOIN2( X, Y ) X##Y
559
560//
561// Set some default values for compiler/library/platform names.
562// These are for debugging config setup only:
563//
564# ifndef BOOST_COMPILER
565# define BOOST_COMPILER "Unknown ISO C++ Compiler"
566# endif
567# ifndef BOOST_STDLIB
568# define BOOST_STDLIB "Unknown ISO standard library"
569# endif
570# ifndef BOOST_PLATFORM
571# if defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE) \
572 || defined(_POSIX_SOURCE)
573# define BOOST_PLATFORM "Generic Unix"
574# else
575# define BOOST_PLATFORM "Unknown"
576# endif
577# endif
578
579//
580// Set some default values GPU support
581//
582# ifndef BOOST_GPU_ENABLED
583# define BOOST_GPU_ENABLED
584# endif
585
586// BOOST_FORCEINLINE ---------------------------------------------//
587// Macro to use in place of 'inline' to force a function to be inline
588#if !defined(BOOST_FORCEINLINE)
589# if defined(_MSC_VER)
590# define BOOST_FORCEINLINE __forceinline
591# elif defined(__GNUC__) && __GNUC__ > 3
592 // Clang also defines __GNUC__ (as 4)
593# define BOOST_FORCEINLINE inline __attribute__ ((__always_inline__))
594# else
595# define BOOST_FORCEINLINE inline
596# endif
597#endif
598
599// BOOST_NOINLINE ---------------------------------------------//
600// Macro to use in place of 'inline' to prevent a function to be inlined
601#if !defined(BOOST_NOINLINE)
602# if defined(_MSC_VER)
603# define BOOST_NOINLINE __declspec(noinline)
604# elif defined(__GNUC__) && __GNUC__ > 3
605 // Clang also defines __GNUC__ (as 4)
606# if defined(__CUDACC__)
607 // nvcc doesn't always parse __noinline__,
608 // see: https://svn.boost.org/trac/boost/ticket/9392
609# define BOOST_NOINLINE __attribute__ ((noinline))
610# else
611# define BOOST_NOINLINE __attribute__ ((__noinline__))
612# endif
613# else
614# define BOOST_NOINLINE
615# endif
616#endif
617
618// BOOST_NORETURN ---------------------------------------------//
619// Macro to use before a function declaration/definition to designate
620// the function as not returning normally (i.e. with a return statement
621// or by leaving the function scope, if the function return type is void).
622#if !defined(BOOST_NORETURN)
623# if defined(_MSC_VER)
624# define BOOST_NORETURN __declspec(noreturn)
625# elif defined(__GNUC__)
626# define BOOST_NORETURN __attribute__ ((__noreturn__))
627# else
628# define BOOST_NO_NORETURN
629# define BOOST_NORETURN
630# endif
631#endif
632
633// Branch prediction hints
634// These macros are intended to wrap conditional expressions that yield true or false
635//
636// if (BOOST_LIKELY(var == 10))
637// {
638// // the most probable code here
639// }
640//
641#if !defined(BOOST_LIKELY)
642# define BOOST_LIKELY(x) x
643#endif
644#if !defined(BOOST_UNLIKELY)
645# define BOOST_UNLIKELY(x) x
646#endif
647
648// Type and data alignment specification
649//
650#if !defined(BOOST_NO_CXX11_ALIGNAS)
651# define BOOST_ALIGNMENT(x) alignas(x)
652#elif defined(_MSC_VER)
653# define BOOST_ALIGNMENT(x) __declspec(align(x))
654#elif defined(__GNUC__)
655# define BOOST_ALIGNMENT(x) __attribute__ ((__aligned__(x)))
656#else
657# define BOOST_NO_ALIGNMENT
658# define BOOST_ALIGNMENT(x)
659#endif
660
661// Lack of non-public defaulted functions is implied by the lack of any defaulted functions
662#if !defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS) && defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS)
663# define BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS
664#endif
665
666// Defaulted and deleted function declaration helpers
667// These macros are intended to be inside a class definition.
668// BOOST_DEFAULTED_FUNCTION accepts the function declaration and its
669// body, which will be used if the compiler doesn't support defaulted functions.
670// BOOST_DELETED_FUNCTION only accepts the function declaration. It
671// will expand to a private function declaration, if the compiler doesn't support
672// deleted functions. Because of this it is recommended to use BOOST_DELETED_FUNCTION
673// in the end of the class definition.
674//
675// class my_class
676// {
677// public:
678// // Default-constructible
679// BOOST_DEFAULTED_FUNCTION(my_class(), {})
680// // Copying prohibited
681// BOOST_DELETED_FUNCTION(my_class(my_class const&))
682// BOOST_DELETED_FUNCTION(my_class& operator= (my_class const&))
683// };
684//
685#if !(defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) || defined(BOOST_NO_CXX11_NON_PUBLIC_DEFAULTED_FUNCTIONS))
686# define BOOST_DEFAULTED_FUNCTION(fun, body) fun = default;
687#else
688# define BOOST_DEFAULTED_FUNCTION(fun, body) fun body
689#endif
690
691#if !defined(BOOST_NO_CXX11_DELETED_FUNCTIONS)
692# define BOOST_DELETED_FUNCTION(fun) fun = delete;
693#else
694# define BOOST_DELETED_FUNCTION(fun) private: fun;
695#endif
696
697//
698// Set BOOST_NO_DECLTYPE_N3276 when BOOST_NO_DECLTYPE is defined
699//
700#if defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_CXX11_DECLTYPE_N3276)
701#define BOOST_NO_CXX11_DECLTYPE_N3276 BOOST_NO_CXX11_DECLTYPE
702#endif
703
704// -------------------- Deprecated macros for 1.50 ---------------------------
705// These will go away in a future release
706
707// Use BOOST_NO_CXX11_HDR_UNORDERED_SET or BOOST_NO_CXX11_HDR_UNORDERED_MAP
708// instead of BOOST_NO_STD_UNORDERED
709#if defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP) || defined (BOOST_NO_CXX11_HDR_UNORDERED_SET)
710# ifndef BOOST_NO_CXX11_STD_UNORDERED
711# define BOOST_NO_CXX11_STD_UNORDERED
712# endif
713#endif
714
715// Use BOOST_NO_CXX11_HDR_INITIALIZER_LIST instead of BOOST_NO_INITIALIZER_LISTS
716#if defined(BOOST_NO_CXX11_HDR_INITIALIZER_LIST) && !defined(BOOST_NO_INITIALIZER_LISTS)
717# define BOOST_NO_INITIALIZER_LISTS
718#endif
719
720// Use BOOST_NO_CXX11_HDR_ARRAY instead of BOOST_NO_0X_HDR_ARRAY
721#if defined(BOOST_NO_CXX11_HDR_ARRAY) && !defined(BOOST_NO_0X_HDR_ARRAY)
722# define BOOST_NO_0X_HDR_ARRAY
723#endif
724// Use BOOST_NO_CXX11_HDR_CHRONO instead of BOOST_NO_0X_HDR_CHRONO
725#if defined(BOOST_NO_CXX11_HDR_CHRONO) && !defined(BOOST_NO_0X_HDR_CHRONO)
726# define BOOST_NO_0X_HDR_CHRONO
727#endif
728// Use BOOST_NO_CXX11_HDR_CODECVT instead of BOOST_NO_0X_HDR_CODECVT
729#if defined(BOOST_NO_CXX11_HDR_CODECVT) && !defined(BOOST_NO_0X_HDR_CODECVT)
730# define BOOST_NO_0X_HDR_CODECVT
731#endif
732// Use BOOST_NO_CXX11_HDR_CONDITION_VARIABLE instead of BOOST_NO_0X_HDR_CONDITION_VARIABLE
733#if defined(BOOST_NO_CXX11_HDR_CONDITION_VARIABLE) && !defined(BOOST_NO_0X_HDR_CONDITION_VARIABLE)
734# define BOOST_NO_0X_HDR_CONDITION_VARIABLE
735#endif
736// Use BOOST_NO_CXX11_HDR_FORWARD_LIST instead of BOOST_NO_0X_HDR_FORWARD_LIST
737#if defined(BOOST_NO_CXX11_HDR_FORWARD_LIST) && !defined(BOOST_NO_0X_HDR_FORWARD_LIST)
738# define BOOST_NO_0X_HDR_FORWARD_LIST
739#endif
740// Use BOOST_NO_CXX11_HDR_FUTURE instead of BOOST_NO_0X_HDR_FUTURE
741#if defined(BOOST_NO_CXX11_HDR_FUTURE) && !defined(BOOST_NO_0X_HDR_FUTURE)
742# define BOOST_NO_0X_HDR_FUTURE
743#endif
744
745// Use BOOST_NO_CXX11_HDR_INITIALIZER_LIST
746// instead of BOOST_NO_0X_HDR_INITIALIZER_LIST or BOOST_NO_INITIALIZER_LISTS
747#ifdef BOOST_NO_CXX11_HDR_INITIALIZER_LIST
748# ifndef BOOST_NO_0X_HDR_INITIALIZER_LIST
749# define BOOST_NO_0X_HDR_INITIALIZER_LIST
750# endif
751# ifndef BOOST_NO_INITIALIZER_LISTS
752# define BOOST_NO_INITIALIZER_LISTS
753# endif
754#endif
755
756// Use BOOST_NO_CXX11_HDR_MUTEX instead of BOOST_NO_0X_HDR_MUTEX
757#if defined(BOOST_NO_CXX11_HDR_MUTEX) && !defined(BOOST_NO_0X_HDR_MUTEX)
758# define BOOST_NO_0X_HDR_MUTEX
759#endif
760// Use BOOST_NO_CXX11_HDR_RANDOM instead of BOOST_NO_0X_HDR_RANDOM
761#if defined(BOOST_NO_CXX11_HDR_RANDOM) && !defined(BOOST_NO_0X_HDR_RANDOM)
762# define BOOST_NO_0X_HDR_RANDOM
763#endif
764// Use BOOST_NO_CXX11_HDR_RATIO instead of BOOST_NO_0X_HDR_RATIO
765#if defined(BOOST_NO_CXX11_HDR_RATIO) && !defined(BOOST_NO_0X_HDR_RATIO)
766# define BOOST_NO_0X_HDR_RATIO
767#endif
768// Use BOOST_NO_CXX11_HDR_REGEX instead of BOOST_NO_0X_HDR_REGEX
769#if defined(BOOST_NO_CXX11_HDR_REGEX) && !defined(BOOST_NO_0X_HDR_REGEX)
770# define BOOST_NO_0X_HDR_REGEX
771#endif
772// Use BOOST_NO_CXX11_HDR_SYSTEM_ERROR instead of BOOST_NO_0X_HDR_SYSTEM_ERROR
773#if defined(BOOST_NO_CXX11_HDR_SYSTEM_ERROR) && !defined(BOOST_NO_0X_HDR_SYSTEM_ERROR)
774# define BOOST_NO_0X_HDR_SYSTEM_ERROR
775#endif
776// Use BOOST_NO_CXX11_HDR_THREAD instead of BOOST_NO_0X_HDR_THREAD
777#if defined(BOOST_NO_CXX11_HDR_THREAD) && !defined(BOOST_NO_0X_HDR_THREAD)
778# define BOOST_NO_0X_HDR_THREAD
779#endif
780// Use BOOST_NO_CXX11_HDR_TUPLE instead of BOOST_NO_0X_HDR_TUPLE
781#if defined(BOOST_NO_CXX11_HDR_TUPLE) && !defined(BOOST_NO_0X_HDR_TUPLE)
782# define BOOST_NO_0X_HDR_TUPLE
783#endif
784// Use BOOST_NO_CXX11_HDR_TYPE_TRAITS instead of BOOST_NO_0X_HDR_TYPE_TRAITS
785#if defined(BOOST_NO_CXX11_HDR_TYPE_TRAITS) && !defined(BOOST_NO_0X_HDR_TYPE_TRAITS)
786# define BOOST_NO_0X_HDR_TYPE_TRAITS
787#endif
788// Use BOOST_NO_CXX11_HDR_TYPEINDEX instead of BOOST_NO_0X_HDR_TYPEINDEX
789#if defined(BOOST_NO_CXX11_HDR_TYPEINDEX) && !defined(BOOST_NO_0X_HDR_TYPEINDEX)
790# define BOOST_NO_0X_HDR_TYPEINDEX
791#endif
792// Use BOOST_NO_CXX11_HDR_UNORDERED_MAP instead of BOOST_NO_0X_HDR_UNORDERED_MAP
793#if defined(BOOST_NO_CXX11_HDR_UNORDERED_MAP) && !defined(BOOST_NO_0X_HDR_UNORDERED_MAP)
794# define BOOST_NO_0X_HDR_UNORDERED_MAP
795#endif
796// Use BOOST_NO_CXX11_HDR_UNORDERED_SET instead of BOOST_NO_0X_HDR_UNORDERED_SET
797#if defined(BOOST_NO_CXX11_HDR_UNORDERED_SET) && !defined(BOOST_NO_0X_HDR_UNORDERED_SET)
798# define BOOST_NO_0X_HDR_UNORDERED_SET
799#endif
800
801// ------------------ End of deprecated macros for 1.50 ---------------------------
802
803// -------------------- Deprecated macros for 1.51 ---------------------------
804// These will go away in a future release
805
806// Use BOOST_NO_CXX11_AUTO_DECLARATIONS instead of BOOST_NO_AUTO_DECLARATIONS
807#if defined(BOOST_NO_CXX11_AUTO_DECLARATIONS) && !defined(BOOST_NO_AUTO_DECLARATIONS)
808# define BOOST_NO_AUTO_DECLARATIONS
809#endif
810// Use BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS instead of BOOST_NO_AUTO_MULTIDECLARATIONS
811#if defined(BOOST_NO_CXX11_AUTO_MULTIDECLARATIONS) && !defined(BOOST_NO_AUTO_MULTIDECLARATIONS)
812# define BOOST_NO_AUTO_MULTIDECLARATIONS
813#endif
814// Use BOOST_NO_CXX11_CHAR16_T instead of BOOST_NO_CHAR16_T
815#if defined(BOOST_NO_CXX11_CHAR16_T) && !defined(BOOST_NO_CHAR16_T)
816# define BOOST_NO_CHAR16_T
817#endif
818// Use BOOST_NO_CXX11_CHAR32_T instead of BOOST_NO_CHAR32_T
819#if defined(BOOST_NO_CXX11_CHAR32_T) && !defined(BOOST_NO_CHAR32_T)
820# define BOOST_NO_CHAR32_T
821#endif
822// Use BOOST_NO_CXX11_TEMPLATE_ALIASES instead of BOOST_NO_TEMPLATE_ALIASES
823#if defined(BOOST_NO_CXX11_TEMPLATE_ALIASES) && !defined(BOOST_NO_TEMPLATE_ALIASES)
824# define BOOST_NO_TEMPLATE_ALIASES
825#endif
826// Use BOOST_NO_CXX11_CONSTEXPR instead of BOOST_NO_CONSTEXPR
827#if defined(BOOST_NO_CXX11_CONSTEXPR) && !defined(BOOST_NO_CONSTEXPR)
828# define BOOST_NO_CONSTEXPR
829#endif
830// Use BOOST_NO_CXX11_DECLTYPE_N3276 instead of BOOST_NO_DECLTYPE_N3276
831#if defined(BOOST_NO_CXX11_DECLTYPE_N3276) && !defined(BOOST_NO_DECLTYPE_N3276)
832# define BOOST_NO_DECLTYPE_N3276
833#endif
834// Use BOOST_NO_CXX11_DECLTYPE instead of BOOST_NO_DECLTYPE
835#if defined(BOOST_NO_CXX11_DECLTYPE) && !defined(BOOST_NO_DECLTYPE)
836# define BOOST_NO_DECLTYPE
837#endif
838// Use BOOST_NO_CXX11_DEFAULTED_FUNCTIONS instead of BOOST_NO_DEFAULTED_FUNCTIONS
839#if defined(BOOST_NO_CXX11_DEFAULTED_FUNCTIONS) && !defined(BOOST_NO_DEFAULTED_FUNCTIONS)
840# define BOOST_NO_DEFAULTED_FUNCTIONS
841#endif
842// Use BOOST_NO_CXX11_DELETED_FUNCTIONS instead of BOOST_NO_DELETED_FUNCTIONS
843#if defined(BOOST_NO_CXX11_DELETED_FUNCTIONS) && !defined(BOOST_NO_DELETED_FUNCTIONS)
844# define BOOST_NO_DELETED_FUNCTIONS
845#endif
846// Use BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS instead of BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
847#if defined(BOOST_NO_CXX11_EXPLICIT_CONVERSION_OPERATORS) && !defined(BOOST_NO_EXPLICIT_CONVERSION_OPERATORS)
848# define BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
849#endif
850// Use BOOST_NO_CXX11_EXTERN_TEMPLATE instead of BOOST_NO_EXTERN_TEMPLATE
851#if defined(BOOST_NO_CXX11_EXTERN_TEMPLATE) && !defined(BOOST_NO_EXTERN_TEMPLATE)
852# define BOOST_NO_EXTERN_TEMPLATE
853#endif
854// Use BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS instead of BOOST_NO_FUNCTION_TEMPLATE_DEFAULT_ARGS
855#if defined(BOOST_NO_CXX11_FUNCTION_TEMPLATE_DEFAULT_ARGS) && !defined(BOOST_NO_FUNCTION_TEMPLATE_DEFAULT_ARGS)
856# define BOOST_NO_FUNCTION_TEMPLATE_DEFAULT_ARGS
857#endif
858// Use BOOST_NO_CXX11_LAMBDAS instead of BOOST_NO_LAMBDAS
859#if defined(BOOST_NO_CXX11_LAMBDAS) && !defined(BOOST_NO_LAMBDAS)
860# define BOOST_NO_LAMBDAS
861#endif
862// Use BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS instead of BOOST_NO_LOCAL_CLASS_TEMPLATE_PARAMETERS
863#if defined(BOOST_NO_CXX11_LOCAL_CLASS_TEMPLATE_PARAMETERS) && !defined(BOOST_NO_LOCAL_CLASS_TEMPLATE_PARAMETERS)
864# define BOOST_NO_LOCAL_CLASS_TEMPLATE_PARAMETERS
865#endif
866// Use BOOST_NO_CXX11_NOEXCEPT instead of BOOST_NO_NOEXCEPT
867#if defined(BOOST_NO_CXX11_NOEXCEPT) && !defined(BOOST_NO_NOEXCEPT)
868# define BOOST_NO_NOEXCEPT
869#endif
870// Use BOOST_NO_CXX11_NULLPTR instead of BOOST_NO_NULLPTR
871#if defined(BOOST_NO_CXX11_NULLPTR) && !defined(BOOST_NO_NULLPTR)
872# define BOOST_NO_NULLPTR
873#endif
874// Use BOOST_NO_CXX11_RAW_LITERALS instead of BOOST_NO_RAW_LITERALS
875#if defined(BOOST_NO_CXX11_RAW_LITERALS) && !defined(BOOST_NO_RAW_LITERALS)
876# define BOOST_NO_RAW_LITERALS
877#endif
878// Use BOOST_NO_CXX11_RVALUE_REFERENCES instead of BOOST_NO_RVALUE_REFERENCES
879#if defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_NO_RVALUE_REFERENCES)
880# define BOOST_NO_RVALUE_REFERENCES
881#endif
882// Use BOOST_NO_CXX11_SCOPED_ENUMS instead of BOOST_NO_SCOPED_ENUMS
883#if defined(BOOST_NO_CXX11_SCOPED_ENUMS) && !defined(BOOST_NO_SCOPED_ENUMS)
884# define BOOST_NO_SCOPED_ENUMS
885#endif
886// Use BOOST_NO_CXX11_STATIC_ASSERT instead of BOOST_NO_STATIC_ASSERT
887#if defined(BOOST_NO_CXX11_STATIC_ASSERT) && !defined(BOOST_NO_STATIC_ASSERT)
888# define BOOST_NO_STATIC_ASSERT
889#endif
890// Use BOOST_NO_CXX11_STD_UNORDERED instead of BOOST_NO_STD_UNORDERED
891#if defined(BOOST_NO_CXX11_STD_UNORDERED) && !defined(BOOST_NO_STD_UNORDERED)
892# define BOOST_NO_STD_UNORDERED
893#endif
894// Use BOOST_NO_CXX11_UNICODE_LITERALS instead of BOOST_NO_UNICODE_LITERALS
895#if defined(BOOST_NO_CXX11_UNICODE_LITERALS) && !defined(BOOST_NO_UNICODE_LITERALS)
896# define BOOST_NO_UNICODE_LITERALS
897#endif
898// Use BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX instead of BOOST_NO_UNIFIED_INITIALIZATION_SYNTAX
899#if defined(BOOST_NO_CXX11_UNIFIED_INITIALIZATION_SYNTAX) && !defined(BOOST_NO_UNIFIED_INITIALIZATION_SYNTAX)
900# define BOOST_NO_UNIFIED_INITIALIZATION_SYNTAX
901#endif
902// Use BOOST_NO_CXX11_VARIADIC_TEMPLATES instead of BOOST_NO_VARIADIC_TEMPLATES
903#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_VARIADIC_TEMPLATES)
904# define BOOST_NO_VARIADIC_TEMPLATES
905#endif
906// Use BOOST_NO_CXX11_VARIADIC_MACROS instead of BOOST_NO_VARIADIC_MACROS
907#if defined(BOOST_NO_CXX11_VARIADIC_MACROS) && !defined(BOOST_NO_VARIADIC_MACROS)
908# define BOOST_NO_VARIADIC_MACROS
909#endif
910// Use BOOST_NO_CXX11_NUMERIC_LIMITS instead of BOOST_NO_NUMERIC_LIMITS_LOWEST
911#if defined(BOOST_NO_CXX11_NUMERIC_LIMITS) && !defined(BOOST_NO_NUMERIC_LIMITS_LOWEST)
912# define BOOST_NO_NUMERIC_LIMITS_LOWEST
913#endif
914// ------------------ End of deprecated macros for 1.51 ---------------------------
915
916
917
918//
919// Helper macros BOOST_NOEXCEPT, BOOST_NOEXCEPT_IF, BOOST_NOEXCEPT_EXPR
920// These aid the transition to C++11 while still supporting C++03 compilers
921//
922#ifdef BOOST_NO_CXX11_NOEXCEPT
923# define BOOST_NOEXCEPT
924# define BOOST_NOEXCEPT_OR_NOTHROW throw()
925# define BOOST_NOEXCEPT_IF(Predicate)
926# define BOOST_NOEXCEPT_EXPR(Expression) false
927#else
928# define BOOST_NOEXCEPT noexcept
929# define BOOST_NOEXCEPT_OR_NOTHROW noexcept
930# define BOOST_NOEXCEPT_IF(Predicate) noexcept((Predicate))
931# define BOOST_NOEXCEPT_EXPR(Expression) noexcept((Expression))
932#endif
933//
934// Helper macro BOOST_FALLTHROUGH
935// Fallback definition of BOOST_FALLTHROUGH macro used to mark intended
936// fall-through between case labels in a switch statement. We use a definition
937// that requires a semicolon after it to avoid at least one type of misuse even
938// on unsupported compilers.
939//
940#ifndef BOOST_FALLTHROUGH
941# define BOOST_FALLTHROUGH ((void)0)
942#endif
943
944//
945// constexpr workarounds
946//
947#if defined(BOOST_NO_CXX11_CONSTEXPR)
948#define BOOST_CONSTEXPR
949#define BOOST_CONSTEXPR_OR_CONST const
950#else
951#define BOOST_CONSTEXPR constexpr
952#define BOOST_CONSTEXPR_OR_CONST constexpr
953#endif
954#if defined(BOOST_NO_CXX14_CONSTEXPR)
955#define BOOST_CXX14_CONSTEXPR
956#else
957#define BOOST_CXX14_CONSTEXPR constexpr
958#endif
959
960//
961// Unused variable/typedef workarounds:
962//
963#ifndef BOOST_ATTRIBUTE_UNUSED
964# define BOOST_ATTRIBUTE_UNUSED
965#endif
966
967#define BOOST_STATIC_CONSTEXPR static BOOST_CONSTEXPR_OR_CONST
968
969//
970// Set BOOST_HAS_STATIC_ASSERT when BOOST_NO_CXX11_STATIC_ASSERT is not defined
971//
972#if !defined(BOOST_NO_CXX11_STATIC_ASSERT) && !defined(BOOST_HAS_STATIC_ASSERT)
973# define BOOST_HAS_STATIC_ASSERT
974#endif
975
976//
977// Set BOOST_HAS_RVALUE_REFS when BOOST_NO_CXX11_RVALUE_REFERENCES is not defined
978//
979#if !defined(BOOST_NO_CXX11_RVALUE_REFERENCES) && !defined(BOOST_HAS_RVALUE_REFS)
980#define BOOST_HAS_RVALUE_REFS
981#endif
982
983//
984// Set BOOST_HAS_VARIADIC_TMPL when BOOST_NO_CXX11_VARIADIC_TEMPLATES is not defined
985//
986#if !defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_HAS_VARIADIC_TMPL)
987#define BOOST_HAS_VARIADIC_TMPL
988#endif
989//
990// Set BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS when
991// BOOST_NO_CXX11_VARIADIC_TEMPLATES is set:
992//
993#if defined(BOOST_NO_CXX11_VARIADIC_TEMPLATES) && !defined(BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS)
994# define BOOST_NO_CXX11_FIXED_LENGTH_VARIADIC_TEMPLATE_EXPANSION_PACKS
995#endif
996
997//
998// Finish off with checks for macros that are depricated / no longer supported,
999// if any of these are set then it's very likely that much of Boost will no
1000// longer work. So stop with a #error for now, but give the user a chance
1001// to continue at their own risk if they really want to:
1002//
1003#if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) && !defined(BOOST_CONFIG_ALLOW_DEPRECATED)
1004# error "You are using a compiler which lacks features which are now a minimum requirement in order to use Boost, define BOOST_CONFIG_ALLOW_DEPRECATED if you want to continue at your own risk!!!"
1005#endif
1006
1007#endif
1008

source code of boost/boost/config/suffix.hpp