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Diffstat (limited to '3rdParty/Boost/boost/function/function_base.hpp')
| -rw-r--r-- | 3rdParty/Boost/boost/function/function_base.hpp | 880 |
1 files changed, 880 insertions, 0 deletions
diff --git a/3rdParty/Boost/boost/function/function_base.hpp b/3rdParty/Boost/boost/function/function_base.hpp new file mode 100644 index 0000000..6612fb8 --- /dev/null +++ b/3rdParty/Boost/boost/function/function_base.hpp @@ -0,0 +1,880 @@ +// Boost.Function library + +// Copyright Douglas Gregor 2001-2006 +// Copyright Emil Dotchevski 2007 +// Use, modification and distribution is 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) + +// For more information, see http://www.boost.org + +#ifndef BOOST_FUNCTION_BASE_HEADER +#define BOOST_FUNCTION_BASE_HEADER + +#include <stdexcept> +#include <string> +#include <memory> +#include <new> +#include <typeinfo> +#include <boost/config.hpp> +#include <boost/assert.hpp> +#include <boost/type_traits/is_const.hpp> +#include <boost/type_traits/is_integral.hpp> +#include <boost/type_traits/is_volatile.hpp> +#include <boost/type_traits/composite_traits.hpp> +#include <boost/type_traits/ice.hpp> +#include <boost/ref.hpp> +#include <boost/mpl/if.hpp> +#include <boost/detail/workaround.hpp> +#include <boost/type_traits/alignment_of.hpp> +#ifndef BOOST_NO_SFINAE +# include "boost/utility/enable_if.hpp" +#else +# include "boost/mpl/bool.hpp" +#endif +#include <boost/function_equal.hpp> +#include <boost/function/function_fwd.hpp> + +#if defined(BOOST_MSVC) +# pragma warning( push ) +# pragma warning( disable : 4793 ) // complaint about native code generation +# pragma warning( disable : 4127 ) // "conditional expression is constant" +#endif + +// Define BOOST_FUNCTION_STD_NS to the namespace that contains type_info. +#ifdef BOOST_NO_EXCEPTION_STD_NAMESPACE +// Embedded VC++ does not have type_info in namespace std +# define BOOST_FUNCTION_STD_NS +#else +# define BOOST_FUNCTION_STD_NS std +#endif + +// Borrowed from Boost.Python library: determines the cases where we +// need to use std::type_info::name to compare instead of operator==. +# if (defined(__GNUC__) && __GNUC__ >= 3) \ + || defined(_AIX) \ + || ( defined(__sgi) && defined(__host_mips)) +# include <cstring> +# define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) \ + (std::strcmp((X).name(),(Y).name()) == 0) +# else +# define BOOST_FUNCTION_COMPARE_TYPE_ID(X,Y) ((X)==(Y)) +#endif + +#if defined(BOOST_MSVC) && BOOST_MSVC <= 1300 || defined(__ICL) && __ICL <= 600 || defined(__MWERKS__) && __MWERKS__ < 0x2406 && !defined(BOOST_STRICT_CONFIG) +# define BOOST_FUNCTION_TARGET_FIX(x) x +#else +# define BOOST_FUNCTION_TARGET_FIX(x) +#endif // not MSVC + +#if !BOOST_WORKAROUND(__BORLANDC__, < 0x5A0) +# define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type) \ + typename ::boost::enable_if_c<(::boost::type_traits::ice_not< \ + (::boost::is_integral<Functor>::value)>::value), \ + Type>::type +#else +// BCC doesn't recognize this depends on a template argument and complains +// about the use of 'typename' +# define BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor,Type) \ + ::boost::enable_if_c<(::boost::type_traits::ice_not< \ + (::boost::is_integral<Functor>::value)>::value), \ + Type>::type +#endif + +namespace boost { + namespace detail { + namespace function { + class X; + + /** + * A buffer used to store small function objects in + * boost::function. It is a union containing function pointers, + * object pointers, and a structure that resembles a bound + * member function pointer. + */ + union function_buffer + { + // For pointers to function objects + mutable void* obj_ptr; + + // For pointers to std::type_info objects + struct type_t { + // (get_functor_type_tag, check_functor_type_tag). + const BOOST_FUNCTION_STD_NS::type_info* type; + + // Whether the type is const-qualified. + bool const_qualified; + // Whether the type is volatile-qualified. + bool volatile_qualified; + } type; + + // For function pointers of all kinds + mutable void (*func_ptr)(); + + // For bound member pointers + struct bound_memfunc_ptr_t { + void (X::*memfunc_ptr)(int); + void* obj_ptr; + } bound_memfunc_ptr; + + // For references to function objects. We explicitly keep + // track of the cv-qualifiers on the object referenced. + struct obj_ref_t { + mutable void* obj_ptr; + bool is_const_qualified; + bool is_volatile_qualified; + } obj_ref; + + // To relax aliasing constraints + mutable char data; + }; + + /** + * The unusable class is a placeholder for unused function arguments + * It is also completely unusable except that it constructable from + * anything. This helps compilers without partial specialization to + * handle Boost.Function objects returning void. + */ + struct unusable + { + unusable() {} + template<typename T> unusable(const T&) {} + }; + + /* Determine the return type. This supports compilers that do not support + * void returns or partial specialization by silently changing the return + * type to "unusable". + */ + template<typename T> struct function_return_type { typedef T type; }; + + template<> + struct function_return_type<void> + { + typedef unusable type; + }; + + // The operation type to perform on the given functor/function pointer + enum functor_manager_operation_type { + clone_functor_tag, + move_functor_tag, + destroy_functor_tag, + check_functor_type_tag, + get_functor_type_tag + }; + + // Tags used to decide between different types of functions + struct function_ptr_tag {}; + struct function_obj_tag {}; + struct member_ptr_tag {}; + struct function_obj_ref_tag {}; + + template<typename F> + class get_function_tag + { + typedef typename mpl::if_c<(is_pointer<F>::value), + function_ptr_tag, + function_obj_tag>::type ptr_or_obj_tag; + + typedef typename mpl::if_c<(is_member_pointer<F>::value), + member_ptr_tag, + ptr_or_obj_tag>::type ptr_or_obj_or_mem_tag; + + typedef typename mpl::if_c<(is_reference_wrapper<F>::value), + function_obj_ref_tag, + ptr_or_obj_or_mem_tag>::type or_ref_tag; + + public: + typedef or_ref_tag type; + }; + + // The trivial manager does nothing but return the same pointer (if we + // are cloning) or return the null pointer (if we are deleting). + template<typename F> + struct reference_manager + { + static inline void + manage(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op) + { + switch (op) { + case clone_functor_tag: + out_buffer.obj_ref.obj_ptr = in_buffer.obj_ref.obj_ptr; + return; + + case move_functor_tag: + out_buffer.obj_ref.obj_ptr = in_buffer.obj_ref.obj_ptr; + in_buffer.obj_ref.obj_ptr = 0; + return; + + case destroy_functor_tag: + out_buffer.obj_ref.obj_ptr = 0; + return; + + case check_functor_type_tag: + { + const BOOST_FUNCTION_STD_NS::type_info& check_type + = *out_buffer.type.type; + + // Check whether we have the same type. We can add + // cv-qualifiers, but we can't take them away. + if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(F)) + && (!in_buffer.obj_ref.is_const_qualified + || out_buffer.type.const_qualified) + && (!in_buffer.obj_ref.is_volatile_qualified + || out_buffer.type.volatile_qualified)) + out_buffer.obj_ptr = in_buffer.obj_ref.obj_ptr; + else + out_buffer.obj_ptr = 0; + } + return; + + case get_functor_type_tag: + out_buffer.type.type = &typeid(F); + out_buffer.type.const_qualified = in_buffer.obj_ref.is_const_qualified; + out_buffer.type.volatile_qualified = in_buffer.obj_ref.is_volatile_qualified; + return; + } + } + }; + + /** + * Determine if boost::function can use the small-object + * optimization with the function object type F. + */ + template<typename F> + struct function_allows_small_object_optimization + { + BOOST_STATIC_CONSTANT + (bool, + value = ((sizeof(F) <= sizeof(function_buffer) && + (alignment_of<function_buffer>::value + % alignment_of<F>::value == 0)))); + }; + + template <typename F,typename A> + struct functor_wrapper: public F, public A + { + functor_wrapper( F f, A a ): + F(f), + A(a) + { + } + }; + + /** + * The functor_manager class contains a static function "manage" which + * can clone or destroy the given function/function object pointer. + */ + template<typename Functor> + struct functor_manager_common + { + typedef Functor functor_type; + + // Function pointers + static inline void + manage_ptr(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op) + { + if (op == clone_functor_tag) + out_buffer.func_ptr = in_buffer.func_ptr; + else if (op == move_functor_tag) { + out_buffer.func_ptr = in_buffer.func_ptr; + in_buffer.func_ptr = 0; + } else if (op == destroy_functor_tag) + out_buffer.func_ptr = 0; + else if (op == check_functor_type_tag) { + const BOOST_FUNCTION_STD_NS::type_info& check_type + = *out_buffer.type.type; + if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor))) + out_buffer.obj_ptr = &in_buffer.func_ptr; + else + out_buffer.obj_ptr = 0; + } else /* op == get_functor_type_tag */ { + out_buffer.type.type = &typeid(Functor); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + } + } + + // Function objects that fit in the small-object buffer. + static inline void + manage_small(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op) + { + if (op == clone_functor_tag || op == move_functor_tag) { + const functor_type* in_functor = + reinterpret_cast<const functor_type*>(&in_buffer.data); + new ((void*)&out_buffer.data) functor_type(*in_functor); + + if (op == move_functor_tag) { + reinterpret_cast<functor_type*>(&in_buffer.data)->~Functor(); + } + } else if (op == destroy_functor_tag) { + // Some compilers (Borland, vc6, ...) are unhappy with ~functor_type. + reinterpret_cast<functor_type*>(&out_buffer.data)->~Functor(); + } else if (op == check_functor_type_tag) { + const BOOST_FUNCTION_STD_NS::type_info& check_type + = *out_buffer.type.type; + if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor))) + out_buffer.obj_ptr = &in_buffer.data; + else + out_buffer.obj_ptr = 0; + } else /* op == get_functor_type_tag */ { + out_buffer.type.type = &typeid(Functor); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + } + } + }; + + template<typename Functor> + struct functor_manager + { + private: + typedef Functor functor_type; + + // Function pointers + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, function_ptr_tag) + { + functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op); + } + + // Function objects that fit in the small-object buffer. + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, mpl::true_) + { + functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op); + } + + // Function objects that require heap allocation + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, mpl::false_) + { + if (op == clone_functor_tag) { + // Clone the functor + // GCC 2.95.3 gets the CV qualifiers wrong here, so we + // can't do the static_cast that we should do. + const functor_type* f = + (const functor_type*)(in_buffer.obj_ptr); + functor_type* new_f = new functor_type(*f); + out_buffer.obj_ptr = new_f; + } else if (op == move_functor_tag) { + out_buffer.obj_ptr = in_buffer.obj_ptr; + in_buffer.obj_ptr = 0; + } else if (op == destroy_functor_tag) { + /* Cast from the void pointer to the functor pointer type */ + functor_type* f = + static_cast<functor_type*>(out_buffer.obj_ptr); + delete f; + out_buffer.obj_ptr = 0; + } else if (op == check_functor_type_tag) { + const BOOST_FUNCTION_STD_NS::type_info& check_type + = *out_buffer.type.type; + if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor))) + out_buffer.obj_ptr = in_buffer.obj_ptr; + else + out_buffer.obj_ptr = 0; + } else /* op == get_functor_type_tag */ { + out_buffer.type.type = &typeid(Functor); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + } + } + + // For function objects, we determine whether the function + // object can use the small-object optimization buffer or + // whether we need to allocate it on the heap. + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, function_obj_tag) + { + manager(in_buffer, out_buffer, op, + mpl::bool_<(function_allows_small_object_optimization<functor_type>::value)>()); + } + + // For member pointers, we use the small-object optimization buffer. + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, member_ptr_tag) + { + manager(in_buffer, out_buffer, op, mpl::true_()); + } + + public: + /* Dispatch to an appropriate manager based on whether we have a + function pointer or a function object pointer. */ + static inline void + manage(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op) + { + typedef typename get_function_tag<functor_type>::type tag_type; + switch (op) { + case get_functor_type_tag: + out_buffer.type.type = &typeid(functor_type); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + return; + + default: + manager(in_buffer, out_buffer, op, tag_type()); + return; + } + } + }; + + template<typename Functor, typename Allocator> + struct functor_manager_a + { + private: + typedef Functor functor_type; + + // Function pointers + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, function_ptr_tag) + { + functor_manager_common<Functor>::manage_ptr(in_buffer,out_buffer,op); + } + + // Function objects that fit in the small-object buffer. + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, mpl::true_) + { + functor_manager_common<Functor>::manage_small(in_buffer,out_buffer,op); + } + + // Function objects that require heap allocation + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, mpl::false_) + { + typedef functor_wrapper<Functor,Allocator> functor_wrapper_type; + typedef typename Allocator::template rebind<functor_wrapper_type>::other + wrapper_allocator_type; + typedef typename wrapper_allocator_type::pointer wrapper_allocator_pointer_type; + + if (op == clone_functor_tag) { + // Clone the functor + // GCC 2.95.3 gets the CV qualifiers wrong here, so we + // can't do the static_cast that we should do. + const functor_wrapper_type* f = + (const functor_wrapper_type*)(in_buffer.obj_ptr); + wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*f)); + wrapper_allocator_pointer_type copy = wrapper_allocator.allocate(1); + wrapper_allocator.construct(copy, *f); + + // Get back to the original pointer type + functor_wrapper_type* new_f = static_cast<functor_wrapper_type*>(copy); + out_buffer.obj_ptr = new_f; + } else if (op == move_functor_tag) { + out_buffer.obj_ptr = in_buffer.obj_ptr; + in_buffer.obj_ptr = 0; + } else if (op == destroy_functor_tag) { + /* Cast from the void pointer to the functor_wrapper_type */ + functor_wrapper_type* victim = + static_cast<functor_wrapper_type*>(in_buffer.obj_ptr); + wrapper_allocator_type wrapper_allocator(static_cast<Allocator const &>(*victim)); + wrapper_allocator.destroy(victim); + wrapper_allocator.deallocate(victim,1); + out_buffer.obj_ptr = 0; + } else if (op == check_functor_type_tag) { + const BOOST_FUNCTION_STD_NS::type_info& check_type + = *out_buffer.type.type; + if (BOOST_FUNCTION_COMPARE_TYPE_ID(check_type, typeid(Functor))) + out_buffer.obj_ptr = in_buffer.obj_ptr; + else + out_buffer.obj_ptr = 0; + } else /* op == get_functor_type_tag */ { + out_buffer.type.type = &typeid(Functor); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + } + } + + // For function objects, we determine whether the function + // object can use the small-object optimization buffer or + // whether we need to allocate it on the heap. + static inline void + manager(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op, function_obj_tag) + { + manager(in_buffer, out_buffer, op, + mpl::bool_<(function_allows_small_object_optimization<functor_type>::value)>()); + } + + public: + /* Dispatch to an appropriate manager based on whether we have a + function pointer or a function object pointer. */ + static inline void + manage(const function_buffer& in_buffer, function_buffer& out_buffer, + functor_manager_operation_type op) + { + typedef typename get_function_tag<functor_type>::type tag_type; + switch (op) { + case get_functor_type_tag: + out_buffer.type.type = &typeid(functor_type); + out_buffer.type.const_qualified = false; + out_buffer.type.volatile_qualified = false; + return; + + default: + manager(in_buffer, out_buffer, op, tag_type()); + return; + } + } + }; + + // A type that is only used for comparisons against zero + struct useless_clear_type {}; + +#ifdef BOOST_NO_SFINAE + // These routines perform comparisons between a Boost.Function + // object and an arbitrary function object (when the last + // parameter is mpl::bool_<false>) or against zero (when the + // last parameter is mpl::bool_<true>). They are only necessary + // for compilers that don't support SFINAE. + template<typename Function, typename Functor> + bool + compare_equal(const Function& f, const Functor&, int, mpl::bool_<true>) + { return f.empty(); } + + template<typename Function, typename Functor> + bool + compare_not_equal(const Function& f, const Functor&, int, + mpl::bool_<true>) + { return !f.empty(); } + + template<typename Function, typename Functor> + bool + compare_equal(const Function& f, const Functor& g, long, + mpl::bool_<false>) + { + if (const Functor* fp = f.template target<Functor>()) + return function_equal(*fp, g); + else return false; + } + + template<typename Function, typename Functor> + bool + compare_equal(const Function& f, const reference_wrapper<Functor>& g, + int, mpl::bool_<false>) + { + if (const Functor* fp = f.template target<Functor>()) + return fp == g.get_pointer(); + else return false; + } + + template<typename Function, typename Functor> + bool + compare_not_equal(const Function& f, const Functor& g, long, + mpl::bool_<false>) + { + if (const Functor* fp = f.template target<Functor>()) + return !function_equal(*fp, g); + else return true; + } + + template<typename Function, typename Functor> + bool + compare_not_equal(const Function& f, + const reference_wrapper<Functor>& g, int, + mpl::bool_<false>) + { + if (const Functor* fp = f.template target<Functor>()) + return fp != g.get_pointer(); + else return true; + } +#endif // BOOST_NO_SFINAE + + /** + * Stores the "manager" portion of the vtable for a + * boost::function object. + */ + struct vtable_base + { + void (*manager)(const function_buffer& in_buffer, + function_buffer& out_buffer, + functor_manager_operation_type op); + }; + } // end namespace function + } // end namespace detail + +/** + * The function_base class contains the basic elements needed for the + * function1, function2, function3, etc. classes. It is common to all + * functions (and as such can be used to tell if we have one of the + * functionN objects). + */ +class function_base +{ +public: + function_base() : vtable(0) { } + + /** Determine if the function is empty (i.e., has no target). */ + bool empty() const { return !vtable; } + + /** Retrieve the type of the stored function object, or typeid(void) + if this is empty. */ + const BOOST_FUNCTION_STD_NS::type_info& target_type() const + { + if (!vtable) return typeid(void); + + detail::function::function_buffer type; + vtable->manager(functor, type, detail::function::get_functor_type_tag); + return *type.type.type; + } + + template<typename Functor> + Functor* target() + { + if (!vtable) return 0; + + detail::function::function_buffer type_result; + type_result.type.type = &typeid(Functor); + type_result.type.const_qualified = is_const<Functor>::value; + type_result.type.volatile_qualified = is_volatile<Functor>::value; + vtable->manager(functor, type_result, + detail::function::check_functor_type_tag); + return static_cast<Functor*>(type_result.obj_ptr); + } + + template<typename Functor> +#if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300) + const Functor* target( Functor * = 0 ) const +#else + const Functor* target() const +#endif + { + if (!vtable) return 0; + + detail::function::function_buffer type_result; + type_result.type.type = &typeid(Functor); + type_result.type.const_qualified = true; + type_result.type.volatile_qualified = is_volatile<Functor>::value; + vtable->manager(functor, type_result, + detail::function::check_functor_type_tag); + // GCC 2.95.3 gets the CV qualifiers wrong here, so we + // can't do the static_cast that we should do. + return (const Functor*)(type_result.obj_ptr); + } + + template<typename F> + bool contains(const F& f) const + { +#if defined(BOOST_MSVC) && BOOST_WORKAROUND(BOOST_MSVC, < 1300) + if (const F* fp = this->target( (F*)0 )) +#else + if (const F* fp = this->template target<F>()) +#endif + { + return function_equal(*fp, f); + } else { + return false; + } + } + +#if defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3 + // GCC 3.3 and newer cannot copy with the global operator==, due to + // problems with instantiation of function return types before it + // has been verified that the argument types match up. + template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator==(Functor g) const + { + if (const Functor* fp = target<Functor>()) + return function_equal(*fp, g); + else return false; + } + + template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator!=(Functor g) const + { + if (const Functor* fp = target<Functor>()) + return !function_equal(*fp, g); + else return true; + } +#endif + +public: // should be protected, but GCC 2.95.3 will fail to allow access + detail::function::vtable_base* vtable; + mutable detail::function::function_buffer functor; +}; + +/** + * The bad_function_call exception class is thrown when a boost::function + * object is invoked + */ +class bad_function_call : public std::runtime_error +{ +public: + bad_function_call() : std::runtime_error("call to empty boost::function") {} +}; + +#ifndef BOOST_NO_SFINAE +inline bool operator==(const function_base& f, + detail::function::useless_clear_type*) +{ + return f.empty(); +} + +inline bool operator!=(const function_base& f, + detail::function::useless_clear_type*) +{ + return !f.empty(); +} + +inline bool operator==(detail::function::useless_clear_type*, + const function_base& f) +{ + return f.empty(); +} + +inline bool operator!=(detail::function::useless_clear_type*, + const function_base& f) +{ + return !f.empty(); +} +#endif + +#ifdef BOOST_NO_SFINAE +// Comparisons between boost::function objects and arbitrary function objects +template<typename Functor> + inline bool operator==(const function_base& f, Functor g) + { + typedef mpl::bool_<(is_integral<Functor>::value)> integral; + return detail::function::compare_equal(f, g, 0, integral()); + } + +template<typename Functor> + inline bool operator==(Functor g, const function_base& f) + { + typedef mpl::bool_<(is_integral<Functor>::value)> integral; + return detail::function::compare_equal(f, g, 0, integral()); + } + +template<typename Functor> + inline bool operator!=(const function_base& f, Functor g) + { + typedef mpl::bool_<(is_integral<Functor>::value)> integral; + return detail::function::compare_not_equal(f, g, 0, integral()); + } + +template<typename Functor> + inline bool operator!=(Functor g, const function_base& f) + { + typedef mpl::bool_<(is_integral<Functor>::value)> integral; + return detail::function::compare_not_equal(f, g, 0, integral()); + } +#else + +# if !(defined(__GNUC__) && __GNUC__ == 3 && __GNUC_MINOR__ <= 3) +// Comparisons between boost::function objects and arbitrary function +// objects. GCC 3.3 and before has an obnoxious bug that prevents this +// from working. +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator==(const function_base& f, Functor g) + { + if (const Functor* fp = f.template target<Functor>()) + return function_equal(*fp, g); + else return false; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator==(Functor g, const function_base& f) + { + if (const Functor* fp = f.template target<Functor>()) + return function_equal(g, *fp); + else return false; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator!=(const function_base& f, Functor g) + { + if (const Functor* fp = f.template target<Functor>()) + return !function_equal(*fp, g); + else return true; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator!=(Functor g, const function_base& f) + { + if (const Functor* fp = f.template target<Functor>()) + return !function_equal(g, *fp); + else return true; + } +# endif + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator==(const function_base& f, reference_wrapper<Functor> g) + { + if (const Functor* fp = f.template target<Functor>()) + return fp == g.get_pointer(); + else return false; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator==(reference_wrapper<Functor> g, const function_base& f) + { + if (const Functor* fp = f.template target<Functor>()) + return g.get_pointer() == fp; + else return false; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator!=(const function_base& f, reference_wrapper<Functor> g) + { + if (const Functor* fp = f.template target<Functor>()) + return fp != g.get_pointer(); + else return true; + } + +template<typename Functor> + BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL(Functor, bool) + operator!=(reference_wrapper<Functor> g, const function_base& f) + { + if (const Functor* fp = f.template target<Functor>()) + return g.get_pointer() != fp; + else return true; + } + +#endif // Compiler supporting SFINAE + +namespace detail { + namespace function { + inline bool has_empty_target(const function_base* f) + { + return f->empty(); + } + +#if BOOST_WORKAROUND(BOOST_MSVC, <= 1310) + inline bool has_empty_target(const void*) + { + return false; + } +#else + inline bool has_empty_target(...) + { + return false; + } +#endif + } // end namespace function +} // end namespace detail +} // end namespace boost + +#undef BOOST_FUNCTION_ENABLE_IF_NOT_INTEGRAL +#undef BOOST_FUNCTION_COMPARE_TYPE_ID + +#endif // BOOST_FUNCTION_BASE_HEADER |