1 // Boost config.hpp configuration header file ------------------------------//
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3 // Copyright (c) 2001-2003 John Maddock
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4 // Copyright (c) 2001 Darin Adler
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5 // Copyright (c) 2001 Peter Dimov
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6 // Copyright (c) 2002 Bill Kempf
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7 // Copyright (c) 2002 Jens Maurer
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8 // Copyright (c) 2002-2003 David Abrahams
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9 // Copyright (c) 2003 Gennaro Prota
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10 // Copyright (c) 2003 Eric Friedman
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12 // Distributed under the Boost Software License, Version 1.0. (See
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13 // accompanying file LICENSE_1_0.txt or copy at
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14 // http://www.boost.org/LICENSE_1_0.txt)
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16 // See http://www.boost.org/ for most recent version.
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18 // Boost config.hpp policy and rationale documentation has been moved to
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19 // http://www.boost.org/libs/config/
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21 // This file is intended to be stable, and relatively unchanging.
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22 // It should contain boilerplate code only - no compiler specific
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23 // code unless it is unavoidable - no changes unless unavoidable.
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25 #ifndef BOOST_CONFIG_SUFFIX_HPP
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26 #define BOOST_CONFIG_SUFFIX_HPP
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29 // look for long long by looking for the appropriate macros in <limits.h>.
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30 // Note that we use limits.h rather than climits for maximal portability,
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31 // remember that since these just declare a bunch of macros, there should be
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32 // no namespace issues from this.
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34 #if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG) \
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35 && !defined(BOOST_MSVC) && !defined(__BORLANDC__)
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36 # include <limits.h>
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37 # if (defined(ULLONG_MAX) || defined(ULONG_LONG_MAX) || defined(ULONGLONG_MAX))
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38 # define BOOST_HAS_LONG_LONG
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40 # define BOOST_NO_LONG_LONG
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44 // GCC 3.x will clean up all of those nasty macro definitions that
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45 // BOOST_NO_CTYPE_FUNCTIONS is intended to help work around, so undefine
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46 // it under GCC 3.x.
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47 #if defined(__GNUC__) && (__GNUC__ >= 3) && defined(BOOST_NO_CTYPE_FUNCTIONS)
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48 # undef BOOST_NO_CTYPE_FUNCTIONS
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52 // Assume any extensions are in namespace std:: unless stated otherwise:
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54 # ifndef BOOST_STD_EXTENSION_NAMESPACE
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55 # define BOOST_STD_EXTENSION_NAMESPACE std
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59 // If cv-qualified specializations are not allowed, then neither are cv-void ones:
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61 # if defined(BOOST_NO_CV_SPECIALIZATIONS) \
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62 && !defined(BOOST_NO_CV_VOID_SPECIALIZATIONS)
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63 # define BOOST_NO_CV_VOID_SPECIALIZATIONS
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67 // If there is no numeric_limits template, then it can't have any compile time
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68 // constants either!
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70 # if defined(BOOST_NO_LIMITS) \
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71 && !defined(BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS)
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72 # define BOOST_NO_LIMITS_COMPILE_TIME_CONSTANTS
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73 # define BOOST_NO_MS_INT64_NUMERIC_LIMITS
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74 # define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
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78 // if there is no long long then there is no specialisation
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79 // for numeric_limits<long long> either:
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81 #if !defined(BOOST_HAS_LONG_LONG) && !defined(BOOST_NO_LONG_LONG_NUMERIC_LIMITS)
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82 # define BOOST_NO_LONG_LONG_NUMERIC_LIMITS
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86 // if there is no __int64 then there is no specialisation
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87 // for numeric_limits<__int64> either:
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89 #if !defined(BOOST_HAS_MS_INT64) && !defined(BOOST_NO_MS_INT64_NUMERIC_LIMITS)
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90 # define BOOST_NO_MS_INT64_NUMERIC_LIMITS
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94 // if member templates are supported then so is the
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95 // VC6 subset of member templates:
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97 # if !defined(BOOST_NO_MEMBER_TEMPLATES) \
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98 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES)
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99 # define BOOST_MSVC6_MEMBER_TEMPLATES
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103 // Without partial specialization, can't test for partial specialisation bugs:
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105 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
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106 && !defined(BOOST_BCB_PARTIAL_SPECIALIZATION_BUG)
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107 # define BOOST_BCB_PARTIAL_SPECIALIZATION_BUG
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111 // Without partial specialization, we can't have array-type partial specialisations:
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113 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
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114 && !defined(BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS)
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115 # define BOOST_NO_ARRAY_TYPE_SPECIALIZATIONS
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119 // Without partial specialization, std::iterator_traits can't work:
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121 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
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122 && !defined(BOOST_NO_STD_ITERATOR_TRAITS)
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123 # define BOOST_NO_STD_ITERATOR_TRAITS
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127 // Without partial specialization, partial
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128 // specialization with default args won't work either:
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130 # if defined(BOOST_NO_TEMPLATE_PARTIAL_SPECIALIZATION) \
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131 && !defined(BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS)
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132 # define BOOST_NO_PARTIAL_SPECIALIZATION_IMPLICIT_DEFAULT_ARGS
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136 // Without member template support, we can't have template constructors
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137 // in the standard library either:
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139 # if defined(BOOST_NO_MEMBER_TEMPLATES) \
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140 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
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141 && !defined(BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS)
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142 # define BOOST_NO_TEMPLATED_ITERATOR_CONSTRUCTORS
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146 // Without member template support, we can't have a conforming
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147 // std::allocator template either:
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149 # if defined(BOOST_NO_MEMBER_TEMPLATES) \
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150 && !defined(BOOST_MSVC6_MEMBER_TEMPLATES) \
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151 && !defined(BOOST_NO_STD_ALLOCATOR)
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152 # define BOOST_NO_STD_ALLOCATOR
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156 // without ADL support then using declarations will break ADL as well:
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158 #if defined(BOOST_NO_ARGUMENT_DEPENDENT_LOOKUP) && !defined(BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL)
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159 # define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
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163 // Without typeid support we have no dynamic RTTI either:
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165 #if defined(BOOST_NO_TYPEID) && !defined(BOOST_NO_RTTI)
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166 # define BOOST_NO_RTTI
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170 // If we have a standard allocator, then we have a partial one as well:
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172 #if !defined(BOOST_NO_STD_ALLOCATOR)
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173 # define BOOST_HAS_PARTIAL_STD_ALLOCATOR
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177 // We can't have a working std::use_facet if there is no std::locale:
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179 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_USE_FACET)
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180 # define BOOST_NO_STD_USE_FACET
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184 // We can't have a std::messages facet if there is no std::locale:
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186 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_MESSAGES)
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187 # define BOOST_NO_STD_MESSAGES
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191 // We can't have a working std::wstreambuf if there is no std::locale:
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193 # if defined(BOOST_NO_STD_LOCALE) && !defined(BOOST_NO_STD_WSTREAMBUF)
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194 # define BOOST_NO_STD_WSTREAMBUF
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198 // We can't have a <cwctype> if there is no <cwchar>:
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200 # if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_CWCTYPE)
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201 # define BOOST_NO_CWCTYPE
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205 // We can't have a swprintf if there is no <cwchar>:
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207 # if defined(BOOST_NO_CWCHAR) && !defined(BOOST_NO_SWPRINTF)
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208 # define BOOST_NO_SWPRINTF
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212 // If Win32 support is turned off, then we must turn off
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213 // threading support also, unless there is some other
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214 // thread API enabled:
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216 #if defined(BOOST_DISABLE_WIN32) && defined(_WIN32) \
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217 && !defined(BOOST_DISABLE_THREADS) && !defined(BOOST_HAS_PTHREADS)
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218 # define BOOST_DISABLE_THREADS
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222 // Turn on threading support if the compiler thinks that it's in
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223 // multithreaded mode. We put this here because there are only a
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224 // limited number of macros that identify this (if there's any missing
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225 // from here then add to the appropriate compiler section):
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227 #if (defined(__MT__) || defined(_MT) || defined(_REENTRANT) \
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228 || defined(_PTHREADS) || defined(__APPLE__) || defined(__DragonFly__)) \
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229 && !defined(BOOST_HAS_THREADS)
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230 # define BOOST_HAS_THREADS
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234 // Turn threading support off if BOOST_DISABLE_THREADS is defined:
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236 #if defined(BOOST_DISABLE_THREADS) && defined(BOOST_HAS_THREADS)
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237 # undef BOOST_HAS_THREADS
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241 // Turn threading support off if we don't recognise the threading API:
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243 #if defined(BOOST_HAS_THREADS) && !defined(BOOST_HAS_PTHREADS)\
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244 && !defined(BOOST_HAS_WINTHREADS) && !defined(BOOST_HAS_BETHREADS)\
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245 && !defined(BOOST_HAS_MPTASKS)
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246 # undef BOOST_HAS_THREADS
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250 // Turn threading detail macros off if we don't (want to) use threading
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252 #ifndef BOOST_HAS_THREADS
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253 # undef BOOST_HAS_PTHREADS
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254 # undef BOOST_HAS_PTHREAD_MUTEXATTR_SETTYPE
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255 # undef BOOST_HAS_PTHREAD_YIELD
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256 # undef BOOST_HAS_PTHREAD_DELAY_NP
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257 # undef BOOST_HAS_WINTHREADS
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258 # undef BOOST_HAS_BETHREADS
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259 # undef BOOST_HAS_MPTASKS
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263 // If the compiler claims to be C99 conformant, then it had better
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264 // have a <stdint.h>:
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266 # if defined(__STDC_VERSION__) && (__STDC_VERSION__ >= 199901)
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267 # define BOOST_HAS_STDINT_H
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268 # ifndef BOOST_HAS_LOG1P
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269 # define BOOST_HAS_LOG1P
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271 # ifndef BOOST_HAS_EXPM1
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272 # define BOOST_HAS_EXPM1
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277 // Define BOOST_NO_SLIST and BOOST_NO_HASH if required.
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278 // Note that this is for backwards compatibility only.
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280 # if !defined(BOOST_HAS_SLIST) && !defined(BOOST_NO_SLIST)
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281 # define BOOST_NO_SLIST
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284 # if !defined(BOOST_HAS_HASH) && !defined(BOOST_NO_HASH)
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285 # define BOOST_NO_HASH
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289 // Set BOOST_SLIST_HEADER if not set already:
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291 #if defined(BOOST_HAS_SLIST) && !defined(BOOST_SLIST_HEADER)
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292 # define BOOST_SLIST_HEADER <slist>
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296 // Set BOOST_HASH_SET_HEADER if not set already:
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298 #if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_SET_HEADER)
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299 # define BOOST_HASH_SET_HEADER <hash_set>
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303 // Set BOOST_HASH_MAP_HEADER if not set already:
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305 #if defined(BOOST_HAS_HASH) && !defined(BOOST_HASH_MAP_HEADER)
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306 # define BOOST_HASH_MAP_HEADER <hash_map>
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310 // Set BOOST_NO_INITIALIZER_LISTS if there is no library support.
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313 #if defined(BOOST_NO_0X_HDR_INITIALIZER_LIST) && !defined(BOOST_NO_INITIALIZER_LISTS)
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314 # define BOOST_NO_INITIALIZER_LISTS
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317 // BOOST_HAS_ABI_HEADERS
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318 // This macro gets set if we have headers that fix the ABI,
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319 // and prevent ODR violations when linking to external libraries:
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320 #if defined(BOOST_ABI_PREFIX) && defined(BOOST_ABI_SUFFIX) && !defined(BOOST_HAS_ABI_HEADERS)
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321 # define BOOST_HAS_ABI_HEADERS
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324 #if defined(BOOST_HAS_ABI_HEADERS) && defined(BOOST_DISABLE_ABI_HEADERS)
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325 # undef BOOST_HAS_ABI_HEADERS
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328 // BOOST_NO_STDC_NAMESPACE workaround --------------------------------------//
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329 // Because std::size_t usage is so common, even in boost headers which do not
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330 // otherwise use the C library, the <cstddef> workaround is included here so
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331 // that ugly workaround code need not appear in many other boost headers.
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332 // NOTE WELL: This is a workaround for non-conforming compilers; <cstddef>
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333 // must still be #included in the usual places so that <cstddef> inclusion
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334 // works as expected with standard conforming compilers. The resulting
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335 // double inclusion of <cstddef> is harmless.
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337 # ifdef BOOST_NO_STDC_NAMESPACE
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338 # include <cstddef>
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339 namespace std { using ::ptrdiff_t; using ::size_t; }
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342 // Workaround for the unfortunate min/max macros defined by some platform headers
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344 #define BOOST_PREVENT_MACRO_SUBSTITUTION
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346 #ifndef BOOST_USING_STD_MIN
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347 # define BOOST_USING_STD_MIN() using std::min
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350 #ifndef BOOST_USING_STD_MAX
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351 # define BOOST_USING_STD_MAX() using std::max
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354 // BOOST_NO_STD_MIN_MAX workaround -----------------------------------------//
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356 # ifdef BOOST_NO_STD_MIN_MAX
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359 template <class _Tp>
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360 inline const _Tp& min BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp& __a, const _Tp& __b) {
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361 return __b < __a ? __b : __a;
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363 template <class _Tp>
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364 inline const _Tp& max BOOST_PREVENT_MACRO_SUBSTITUTION (const _Tp& __a, const _Tp& __b) {
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365 return __a < __b ? __b : __a;
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371 // BOOST_STATIC_CONSTANT workaround --------------------------------------- //
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372 // On compilers which don't allow in-class initialization of static integral
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373 // constant members, we must use enums as a workaround if we want the constants
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374 // to be available at compile-time. This macro gives us a convenient way to
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375 // declare such constants.
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377 # ifdef BOOST_NO_INCLASS_MEMBER_INITIALIZATION
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378 # define BOOST_STATIC_CONSTANT(type, assignment) enum { assignment }
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380 # define BOOST_STATIC_CONSTANT(type, assignment) static const type assignment
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383 // BOOST_USE_FACET / HAS_FACET workaround ----------------------------------//
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384 // When the standard library does not have a conforming std::use_facet there
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385 // are various workarounds available, but they differ from library to library.
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386 // The same problem occurs with has_facet.
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387 // These macros provide a consistent way to access a locale's facets.
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390 // std::use_facet<Type>(loc);
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392 // BOOST_USE_FACET(Type, loc);
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393 // Note do not add a std:: prefix to the front of BOOST_USE_FACET!
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394 // Use for BOOST_HAS_FACET is analogous.
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396 #if defined(BOOST_NO_STD_USE_FACET)
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397 # ifdef BOOST_HAS_TWO_ARG_USE_FACET
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398 # define BOOST_USE_FACET(Type, loc) std::use_facet(loc, static_cast<Type*>(0))
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399 # define BOOST_HAS_FACET(Type, loc) std::has_facet(loc, static_cast<Type*>(0))
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400 # elif defined(BOOST_HAS_MACRO_USE_FACET)
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401 # define BOOST_USE_FACET(Type, loc) std::_USE(loc, Type)
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402 # define BOOST_HAS_FACET(Type, loc) std::_HAS(loc, Type)
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403 # elif defined(BOOST_HAS_STLP_USE_FACET)
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404 # define BOOST_USE_FACET(Type, loc) (*std::_Use_facet<Type >(loc))
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405 # define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
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408 # define BOOST_USE_FACET(Type, loc) std::use_facet< Type >(loc)
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409 # define BOOST_HAS_FACET(Type, loc) std::has_facet< Type >(loc)
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412 // BOOST_NESTED_TEMPLATE workaround ------------------------------------------//
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413 // Member templates are supported by some compilers even though they can't use
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414 // the A::template member<U> syntax, as a workaround replace:
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416 // typedef typename A::template rebind<U> binder;
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420 // typedef typename A::BOOST_NESTED_TEMPLATE rebind<U> binder;
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422 #ifndef BOOST_NO_MEMBER_TEMPLATE_KEYWORD
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423 # define BOOST_NESTED_TEMPLATE template
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425 # define BOOST_NESTED_TEMPLATE
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428 // BOOST_UNREACHABLE_RETURN(x) workaround -------------------------------------//
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429 // Normally evaluates to nothing, unless BOOST_NO_UNREACHABLE_RETURN_DETECTION
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430 // is defined, in which case it evaluates to return x; Use when you have a return
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431 // statement that can never be reached.
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433 #ifdef BOOST_NO_UNREACHABLE_RETURN_DETECTION
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434 # define BOOST_UNREACHABLE_RETURN(x) return x;
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436 # define BOOST_UNREACHABLE_RETURN(x)
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439 // BOOST_DEDUCED_TYPENAME workaround ------------------------------------------//
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441 // Some compilers don't support the use of `typename' for dependent
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442 // types in deduced contexts, e.g.
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444 // template <class T> void f(T, typename T::type);
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446 // Replace these declarations with:
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448 // template <class T> void f(T, BOOST_DEDUCED_TYPENAME T::type);
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450 #ifndef BOOST_NO_DEDUCED_TYPENAME
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451 # define BOOST_DEDUCED_TYPENAME typename
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453 # define BOOST_DEDUCED_TYPENAME
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456 #ifndef BOOST_NO_TYPENAME_WITH_CTOR
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457 # define BOOST_CTOR_TYPENAME typename
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459 # define BOOST_CTOR_TYPENAME
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462 // long long workaround ------------------------------------------//
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463 // On gcc (and maybe other compilers?) long long is alway supported
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464 // but it's use may generate either warnings (with -ansi), or errors
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465 // (with -pedantic -ansi) unless it's use is prefixed by __extension__
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467 #if defined(BOOST_HAS_LONG_LONG)
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470 __extension__ typedef long long long_long_type;
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471 __extension__ typedef unsigned long long ulong_long_type;
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473 typedef long long long_long_type;
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474 typedef unsigned long long ulong_long_type;
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479 // BOOST_[APPEND_]EXPLICIT_TEMPLATE_[NON_]TYPE macros --------------------------//
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481 // Some compilers have problems with function templates whose template
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482 // parameters don't appear in the function parameter list (basically
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483 // they just link one instantiation of the template in the final
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484 // executable). These macros provide a uniform way to cope with the
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485 // problem with no effects on the calling syntax.
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489 // #include <iostream>
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490 // #include <ostream>
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491 // #include <typeinfo>
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493 // template <int n>
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494 // void f() { std::cout << n << ' '; }
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496 // template <typename T>
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497 // void g() { std::cout << typeid(T).name() << ' '; }
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507 // With VC++ 6.0 the output is:
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509 // 2 2 double double
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511 // To fix it, write
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513 // template <int n>
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514 // void f(BOOST_EXPLICIT_TEMPLATE_NON_TYPE(int, n)) { ... }
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516 // template <typename T>
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517 // void g(BOOST_EXPLICIT_TEMPLATE_TYPE(T)) { ... }
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521 #if defined BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
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523 # include "boost/type.hpp"
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524 # include "boost/non_type.hpp"
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526 # define BOOST_EXPLICIT_TEMPLATE_TYPE(t) boost::type<t>* = 0
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527 # define BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t) boost::type<t>*
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528 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v) boost::non_type<t, v>* = 0
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529 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v) boost::non_type<t, v>*
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531 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t) \
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532 , BOOST_EXPLICIT_TEMPLATE_TYPE(t)
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533 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE_SPEC(t) \
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534 , BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
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535 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t, v) \
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536 , BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
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537 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v) \
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538 , BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
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542 // no workaround needed: expand to nothing
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544 # define BOOST_EXPLICIT_TEMPLATE_TYPE(t)
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545 # define BOOST_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
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546 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
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547 # define BOOST_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
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549 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE(t)
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550 # define BOOST_APPEND_EXPLICIT_TEMPLATE_TYPE_SPEC(t)
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551 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE(t, v)
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552 # define BOOST_APPEND_EXPLICIT_TEMPLATE_NON_TYPE_SPEC(t, v)
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555 #endif // defined BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
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558 // ---------------------------------------------------------------------------//
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561 // Helper macro BOOST_STRINGIZE:
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562 // Converts the parameter X to a string after macro replacement
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563 // on X has been performed.
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565 #define BOOST_STRINGIZE(X) BOOST_DO_STRINGIZE(X)
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566 #define BOOST_DO_STRINGIZE(X) #X
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569 // Helper macro BOOST_JOIN:
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570 // The following piece of macro magic joins the two
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571 // arguments together, even when one of the arguments is
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572 // itself a macro (see 16.3.1 in C++ standard). The key
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573 // is that macro expansion of macro arguments does not
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574 // occur in BOOST_DO_JOIN2 but does in BOOST_DO_JOIN.
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576 #define BOOST_JOIN( X, Y ) BOOST_DO_JOIN( X, Y )
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577 #define BOOST_DO_JOIN( X, Y ) BOOST_DO_JOIN2(X,Y)
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578 #define BOOST_DO_JOIN2( X, Y ) X##Y
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581 // Set some default values for compiler/library/platform names.
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582 // These are for debugging config setup only:
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584 # ifndef BOOST_COMPILER
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585 # define BOOST_COMPILER "Unknown ISO C++ Compiler"
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587 # ifndef BOOST_STDLIB
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588 # define BOOST_STDLIB "Unknown ISO standard library"
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590 # ifndef BOOST_PLATFORM
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591 # if defined(unix) || defined(__unix) || defined(_XOPEN_SOURCE) \
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592 || defined(_POSIX_SOURCE)
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593 # define BOOST_PLATFORM "Generic Unix"
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595 # define BOOST_PLATFORM "Unknown"
\r
