refactor: make talon's choice of result message easier to read in the code as per Richard's suggestion.
// (C) Copyright John Maddock 2001 - 2003.
// (C) Copyright Darin Adler 2001 - 2002.
// (C) Copyright Jens Maurer 2001 - 2002.
// (C) Copyright Beman Dawes 2001 - 2003.
// (C) Copyright Douglas Gregor 2002.
// (C) Copyright David Abrahams 2002 - 2003.
// (C) Copyright Synge Todo 2003.
// Use, modification and distribution are subject to the
// Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
// See http://www.boost.org for most recent version.
// GNU C++ compiler setup:
#if __GNUC__ < 3
# if __GNUC_MINOR__ == 91
// egcs 1.1 won't parse shared_ptr.hpp without this:
# define BOOST_NO_AUTO_PTR
# endif
# if __GNUC_MINOR__ < 95
//
// Prior to gcc 2.95 member templates only partly
// work - define BOOST_MSVC6_MEMBER_TEMPLATES
// instead since inline member templates mostly work.
//
# define BOOST_NO_MEMBER_TEMPLATES
# if __GNUC_MINOR__ >= 9
# define BOOST_MSVC6_MEMBER_TEMPLATES
# endif
# endif
# if __GNUC_MINOR__ < 96
# define BOOST_NO_SFINAE
# endif
# if __GNUC_MINOR__ <= 97
# define BOOST_NO_MEMBER_TEMPLATE_FRIENDS
# define BOOST_NO_OPERATORS_IN_NAMESPACE
# endif
# define BOOST_NO_USING_DECLARATION_OVERLOADS_FROM_TYPENAME_BASE
# define BOOST_FUNCTION_SCOPE_USING_DECLARATION_BREAKS_ADL
# define BOOST_NO_IS_ABSTRACT
#elif __GNUC__ == 3
# if defined (__PATHSCALE__)
# define BOOST_NO_TWO_PHASE_NAME_LOOKUP
# define BOOST_NO_IS_ABSTRACT
# endif
//
// gcc-3.x problems:
//
// Bug specific to gcc 3.1 and 3.2:
//
# if ((__GNUC_MINOR__ == 1) || (__GNUC_MINOR__ == 2))
# define BOOST_NO_EXPLICIT_FUNCTION_TEMPLATE_ARGUMENTS
# endif
# if __GNUC_MINOR__ < 4
# define BOOST_NO_IS_ABSTRACT
# endif
#endif
#if __GNUC__ < 4
//
// All problems to gcc-3.x and earlier here:
//
#define BOOST_NO_TWO_PHASE_NAME_LOOKUP
#endif
#ifndef __EXCEPTIONS
# define BOOST_NO_EXCEPTIONS
#endif
//
// Threading support: Turn this on unconditionally here (except for
// those platforms where we can know for sure). It will get turned off again
// later if no threading API is detected.
//
#if !defined(__MINGW32__) && !defined(linux) && !defined(__linux) && !defined(__linux__)
# define BOOST_HAS_THREADS
#endif
//
// gcc has "long long"
//
#define BOOST_HAS_LONG_LONG
//
// gcc implements the named return value optimization since version 3.1
//
#if __GNUC__ > 3 || ( __GNUC__ == 3 && __GNUC_MINOR__ >= 1 )
#define BOOST_HAS_NRVO
#endif
//
// RTTI and typeinfo detection is possible post gcc-4.3:
//
#if __GNUC__ * 100 + __GNUC_MINOR__ >= 403
# ifndef __GXX_RTTI
# define BOOST_NO_TYPEID
# define BOOST_NO_RTTI
# endif
#endif
//
// C++0x features
//
#define BOOST_NO_CHAR16_T
#define BOOST_NO_CHAR32_T
#define BOOST_NO_CONSTEXPR
#define BOOST_NO_DEFAULTED_FUNCTIONS
#define BOOST_NO_DELETED_FUNCTIONS
#define BOOST_NO_EXPLICIT_CONVERSION_OPERATORS
#define BOOST_NO_EXTERN_TEMPLATE
#define BOOST_NO_RAW_LITERALS
#define BOOST_NO_SCOPED_ENUMS
#define BOOST_NO_UNICODE_LITERALS
// See below for BOOST_NO_AUTO_DECLARATIONS
#define BOOST_NO_AUTO_MULTIDECLARATIONS
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ > 2)) && defined(__GXX_EXPERIMENTAL_CXX0X__)
// C++0x features are only enabled when -std=c++0x or -std=gnu++0x are
// passed on the command line, which in turn defines
// __GXX_EXPERIMENTAL_CXX0X__.
# define BOOST_HAS_DECLTYPE
# define BOOST_HAS_RVALUE_REFS
# define BOOST_HAS_STATIC_ASSERT
# define BOOST_HAS_VARIADIC_TMPL
#else
# define BOOST_NO_DECLTYPE
# define BOOST_NO_RVALUE_REFERENCES
# define BOOST_NO_STATIC_ASSERT
// Variadic templates compiler:
// http://www.generic-programming.org/~dgregor/cpp/variadic-templates.html
# ifdef __VARIADIC_TEMPLATES
# define BOOST_HAS_VARIADIC_TMPL
# else
# define BOOST_NO_VARIADIC_TEMPLATES
# endif
#endif
#if !defined(__GXX_EXPERIMENTAL_CXX0X__) || __GNUC__ < 4 || (__GNUC__ == 4 && __GNUC_MINOR__ < 4)
# define BOOST_NO_INITIALIZER_LISTS
# define BOOST_NO_AUTO_DECLARATIONS
#endif
// ConceptGCC compiler:
// http://www.generic-programming.org/software/ConceptGCC/
#ifdef __GXX_CONCEPTS__
# define BOOST_HAS_CONCEPTS
# define BOOST_COMPILER "ConceptGCC version " __VERSION__
#endif
#ifndef BOOST_COMPILER
# define BOOST_COMPILER "GNU C++ version " __VERSION__
#endif
//
// versions check:
// we don't know gcc prior to version 2.90:
#if (__GNUC__ == 2) && (__GNUC_MINOR__ < 90)
# error "Compiler not configured - please reconfigure"
#endif
//
// last known and checked version is 4.3 (Pre-release):
#if (__GNUC__ > 4) || ((__GNUC__ == 4) && (__GNUC_MINOR__ > 3))
# if defined(BOOST_ASSERT_CONFIG)
# error "Unknown compiler version - please run the configure tests and report the results"
# else
// we don't emit warnings here anymore since there are no defect macros defined for
// gcc post 3.4, so any failures are gcc regressions...
//# warning "Unknown compiler version - please run the configure tests and report the results"
# endif
#endif