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Diffstat (limited to 'ext/boost/function/function_template.hpp')
| -rw-r--r-- | ext/boost/function/function_template.hpp | 1158 |
1 files changed, 1158 insertions, 0 deletions
diff --git a/ext/boost/function/function_template.hpp b/ext/boost/function/function_template.hpp new file mode 100644 index 0000000000..6a99109ab1 --- /dev/null +++ b/ext/boost/function/function_template.hpp @@ -0,0 +1,1158 @@ +// 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 + +// Note: this header is a header template and must NOT have multiple-inclusion +// protection. +#include <boost/function/detail/prologue.hpp> +#include <boost/detail/no_exceptions_support.hpp> + +#if defined(BOOST_MSVC) +# pragma warning( push ) +# pragma warning( disable : 4127 ) // "conditional expression is constant" +#endif + +#define BOOST_FUNCTION_TEMPLATE_PARMS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, typename T) + +#define BOOST_FUNCTION_TEMPLATE_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, T) + +#define BOOST_FUNCTION_PARM(J,I,D) BOOST_PP_CAT(T,I) BOOST_PP_CAT(a,I) + +#define BOOST_FUNCTION_PARMS BOOST_PP_ENUM(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_PARM,BOOST_PP_EMPTY) + +#define BOOST_FUNCTION_ARGS BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS, a) + +#define BOOST_FUNCTION_ARG_TYPE(J,I,D) \ + typedef BOOST_PP_CAT(T,I) BOOST_PP_CAT(BOOST_PP_CAT(arg, BOOST_PP_INC(I)),_type); + +#define BOOST_FUNCTION_ARG_TYPES BOOST_PP_REPEAT(BOOST_FUNCTION_NUM_ARGS,BOOST_FUNCTION_ARG_TYPE,BOOST_PP_EMPTY) + +// Comma if nonzero number of arguments +#if BOOST_FUNCTION_NUM_ARGS == 0 +# define BOOST_FUNCTION_COMMA +#else +# define BOOST_FUNCTION_COMMA , +#endif // BOOST_FUNCTION_NUM_ARGS > 0 + +// Class names used in this version of the code +#define BOOST_FUNCTION_FUNCTION BOOST_JOIN(function,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_FUNCTION_INVOKER \ + BOOST_JOIN(function_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_VOID_FUNCTION_INVOKER \ + BOOST_JOIN(void_function_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_FUNCTION_OBJ_INVOKER \ + BOOST_JOIN(function_obj_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER \ + BOOST_JOIN(void_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_FUNCTION_REF_INVOKER \ + BOOST_JOIN(function_ref_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER \ + BOOST_JOIN(void_function_ref_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_MEMBER_INVOKER \ + BOOST_JOIN(function_mem_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_VOID_MEMBER_INVOKER \ + BOOST_JOIN(function_void_mem_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_GET_FUNCTION_INVOKER \ + BOOST_JOIN(get_function_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER \ + BOOST_JOIN(get_function_obj_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER \ + BOOST_JOIN(get_function_ref_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_GET_MEMBER_INVOKER \ + BOOST_JOIN(get_member_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_GET_INVOKER \ + BOOST_JOIN(get_invoker,BOOST_FUNCTION_NUM_ARGS) +#define BOOST_FUNCTION_VTABLE BOOST_JOIN(basic_vtable,BOOST_FUNCTION_NUM_ARGS) + +#ifndef BOOST_NO_VOID_RETURNS +# define BOOST_FUNCTION_VOID_RETURN_TYPE void +# define BOOST_FUNCTION_RETURN(X) X +#else +# define BOOST_FUNCTION_VOID_RETURN_TYPE boost::detail::function::unusable +# define BOOST_FUNCTION_RETURN(X) X; return BOOST_FUNCTION_VOID_RETURN_TYPE () +#endif + +namespace boost { + namespace detail { + namespace function { + template< + typename FunctionPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_FUNCTION_INVOKER + { + static R invoke(function_buffer& function_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + { + FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr); + return f(BOOST_FUNCTION_ARGS); + } + }; + + template< + typename FunctionPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_VOID_FUNCTION_INVOKER + { + static BOOST_FUNCTION_VOID_RETURN_TYPE + invoke(function_buffer& function_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + FunctionPtr f = reinterpret_cast<FunctionPtr>(function_ptr.func_ptr); + BOOST_FUNCTION_RETURN(f(BOOST_FUNCTION_ARGS)); + } + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_FUNCTION_OBJ_INVOKER + { + static R invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + FunctionObj* f; + if (function_allows_small_object_optimization<FunctionObj>::value) + f = reinterpret_cast<FunctionObj*>(&function_obj_ptr.data); + else + f = reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr); + return (*f)(BOOST_FUNCTION_ARGS); + } + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER + { + static BOOST_FUNCTION_VOID_RETURN_TYPE + invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + FunctionObj* f; + if (function_allows_small_object_optimization<FunctionObj>::value) + f = reinterpret_cast<FunctionObj*>(&function_obj_ptr.data); + else + f = reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr); + BOOST_FUNCTION_RETURN((*f)(BOOST_FUNCTION_ARGS)); + } + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_FUNCTION_REF_INVOKER + { + static R invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + FunctionObj* f = + reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr); + return (*f)(BOOST_FUNCTION_ARGS); + } + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER + { + static BOOST_FUNCTION_VOID_RETURN_TYPE + invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + FunctionObj* f = + reinterpret_cast<FunctionObj*>(function_obj_ptr.obj_ptr); + BOOST_FUNCTION_RETURN((*f)(BOOST_FUNCTION_ARGS)); + } + }; + +#if BOOST_FUNCTION_NUM_ARGS > 0 + /* Handle invocation of member pointers. */ + template< + typename MemberPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_MEMBER_INVOKER + { + static R invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + MemberPtr* f = + reinterpret_cast<MemberPtr*>(&function_obj_ptr.data); + return boost::mem_fn(*f)(BOOST_FUNCTION_ARGS); + } + }; + + template< + typename MemberPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_VOID_MEMBER_INVOKER + { + static BOOST_FUNCTION_VOID_RETURN_TYPE + invoke(function_buffer& function_obj_ptr BOOST_FUNCTION_COMMA + BOOST_FUNCTION_PARMS) + + { + MemberPtr* f = + reinterpret_cast<MemberPtr*>(&function_obj_ptr.data); + BOOST_FUNCTION_RETURN(boost::mem_fn(*f)(BOOST_FUNCTION_ARGS)); + } + }; +#endif + + template< + typename FunctionPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_GET_FUNCTION_INVOKER + { + typedef typename mpl::if_c<(is_void<R>::value), + BOOST_FUNCTION_VOID_FUNCTION_INVOKER< + FunctionPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >, + BOOST_FUNCTION_FUNCTION_INVOKER< + FunctionPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + > + >::type type; + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER + { + typedef typename mpl::if_c<(is_void<R>::value), + BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >, + BOOST_FUNCTION_FUNCTION_OBJ_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + > + >::type type; + }; + + template< + typename FunctionObj, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER + { + typedef typename mpl::if_c<(is_void<R>::value), + BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >, + BOOST_FUNCTION_FUNCTION_REF_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + > + >::type type; + }; + +#if BOOST_FUNCTION_NUM_ARGS > 0 + /* Retrieve the appropriate invoker for a member pointer. */ + template< + typename MemberPtr, + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + struct BOOST_FUNCTION_GET_MEMBER_INVOKER + { + typedef typename mpl::if_c<(is_void<R>::value), + BOOST_FUNCTION_VOID_MEMBER_INVOKER< + MemberPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >, + BOOST_FUNCTION_MEMBER_INVOKER< + MemberPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + > + >::type type; + }; +#endif + + /* Given the tag returned by get_function_tag, retrieve the + actual invoker that will be used for the given function + object. + + Each specialization contains an "apply" nested class template + that accepts the function object, return type, function + argument types, and allocator. The resulting "apply" class + contains two typedefs, "invoker_type" and "manager_type", + which correspond to the invoker and manager types. */ + template<typename Tag> + struct BOOST_FUNCTION_GET_INVOKER { }; + + /* Retrieve the invoker for a function pointer. */ + template<> + struct BOOST_FUNCTION_GET_INVOKER<function_ptr_tag> + { + template<typename FunctionPtr, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + struct apply + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER< + FunctionPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager<FunctionPtr> manager_type; + }; + + template<typename FunctionPtr, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS, + typename Allocator> + struct apply_a + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_INVOKER< + FunctionPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager<FunctionPtr> manager_type; + }; + }; + +#if BOOST_FUNCTION_NUM_ARGS > 0 + /* Retrieve the invoker for a member pointer. */ + template<> + struct BOOST_FUNCTION_GET_INVOKER<member_ptr_tag> + { + template<typename MemberPtr, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + struct apply + { + typedef typename BOOST_FUNCTION_GET_MEMBER_INVOKER< + MemberPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager<MemberPtr> manager_type; + }; + + template<typename MemberPtr, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS, + typename Allocator> + struct apply_a + { + typedef typename BOOST_FUNCTION_GET_MEMBER_INVOKER< + MemberPtr, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager<MemberPtr> manager_type; + }; + }; +#endif + + /* Retrieve the invoker for a function object. */ + template<> + struct BOOST_FUNCTION_GET_INVOKER<function_obj_tag> + { + template<typename FunctionObj, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + struct apply + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager<FunctionObj> manager_type; + }; + + template<typename FunctionObj, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS, + typename Allocator> + struct apply_a + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER< + FunctionObj, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef functor_manager_a<FunctionObj, Allocator> manager_type; + }; + }; + + /* Retrieve the invoker for a reference to a function object. */ + template<> + struct BOOST_FUNCTION_GET_INVOKER<function_obj_ref_tag> + { + template<typename RefWrapper, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + struct apply + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER< + typename RefWrapper::type, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef reference_manager<typename RefWrapper::type> manager_type; + }; + + template<typename RefWrapper, + typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS, + typename Allocator> + struct apply_a + { + typedef typename BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER< + typename RefWrapper::type, + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >::type + invoker_type; + + typedef reference_manager<typename RefWrapper::type> manager_type; + }; + }; + + + /** + * vtable for a specific boost::function instance. This + * structure must be an aggregate so that we can use static + * initialization in boost::function's assign_to and assign_to_a + * members. It therefore cannot have any constructors, + * destructors, base classes, etc. + */ + template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + struct BOOST_FUNCTION_VTABLE + { +#ifndef BOOST_NO_VOID_RETURNS + typedef R result_type; +#else + typedef typename function_return_type<R>::type result_type; +#endif // BOOST_NO_VOID_RETURNS + + typedef result_type (*invoker_type)(function_buffer& + BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS); + + template<typename F> + bool assign_to(F f, function_buffer& functor) + { + typedef typename get_function_tag<F>::type tag; + return assign_to(f, functor, tag()); + } + template<typename F,typename Allocator> + bool assign_to_a(F f, function_buffer& functor, Allocator a) + { + typedef typename get_function_tag<F>::type tag; + return assign_to_a(f, functor, a, tag()); + } + + void clear(function_buffer& functor) + { + if (base.manager) + base.manager(functor, functor, destroy_functor_tag); + } + + private: + // Function pointers + template<typename FunctionPtr> + bool + assign_to(FunctionPtr f, function_buffer& functor, function_ptr_tag) + { + this->clear(functor); + if (f) { + // should be a reinterpret cast, but some compilers insist + // on giving cv-qualifiers to free functions + functor.func_ptr = (void (*)())(f); + return true; + } else { + return false; + } + } + template<typename FunctionPtr,typename Allocator> + bool + assign_to_a(FunctionPtr f, function_buffer& functor, Allocator, function_ptr_tag) + { + return assign_to(f,functor,function_ptr_tag()); + } + + // Member pointers +#if BOOST_FUNCTION_NUM_ARGS > 0 + template<typename MemberPtr> + bool assign_to(MemberPtr f, function_buffer& functor, member_ptr_tag) + { + // DPG TBD: Add explicit support for member function + // objects, so we invoke through mem_fn() but we retain the + // right target_type() values. + if (f) { + this->assign_to(mem_fn(f), functor); + return true; + } else { + return false; + } + } + template<typename MemberPtr,typename Allocator> + bool assign_to_a(MemberPtr f, function_buffer& functor, Allocator a, member_ptr_tag) + { + // DPG TBD: Add explicit support for member function + // objects, so we invoke through mem_fn() but we retain the + // right target_type() values. + if (f) { + this->assign_to_a(mem_fn(f), functor, a); + return true; + } else { + return false; + } + } +#endif // BOOST_FUNCTION_NUM_ARGS > 0 + + // Function objects + // Assign to a function object using the small object optimization + template<typename FunctionObj> + void + assign_functor(FunctionObj f, function_buffer& functor, mpl::true_) + { + new ((void*)&functor.data) FunctionObj(f); + } + template<typename FunctionObj,typename Allocator> + void + assign_functor_a(FunctionObj f, function_buffer& functor, Allocator, mpl::true_) + { + assign_functor(f,functor,mpl::true_()); + } + + // Assign to a function object allocated on the heap. + template<typename FunctionObj> + void + assign_functor(FunctionObj f, function_buffer& functor, mpl::false_) + { + functor.obj_ptr = new FunctionObj(f); + } + template<typename FunctionObj,typename Allocator> + void + assign_functor_a(FunctionObj f, function_buffer& functor, Allocator a, mpl::false_) + { + typedef functor_wrapper<FunctionObj,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; + wrapper_allocator_type wrapper_allocator(a); + wrapper_allocator_pointer_type copy = wrapper_allocator.allocate(1); + wrapper_allocator.construct(copy, functor_wrapper_type(f,a)); + functor_wrapper_type* new_f = static_cast<functor_wrapper_type*>(copy); + functor.obj_ptr = new_f; + } + + template<typename FunctionObj> + bool + assign_to(FunctionObj f, function_buffer& functor, function_obj_tag) + { + if (!boost::detail::function::has_empty_target(boost::addressof(f))) { + assign_functor(f, functor, + mpl::bool_<(function_allows_small_object_optimization<FunctionObj>::value)>()); + return true; + } else { + return false; + } + } + template<typename FunctionObj,typename Allocator> + bool + assign_to_a(FunctionObj f, function_buffer& functor, Allocator a, function_obj_tag) + { + if (!boost::detail::function::has_empty_target(boost::addressof(f))) { + assign_functor_a(f, functor, a, + mpl::bool_<(function_allows_small_object_optimization<FunctionObj>::value)>()); + return true; + } else { + return false; + } + } + + // Reference to a function object + template<typename FunctionObj> + bool + assign_to(const reference_wrapper<FunctionObj>& f, + function_buffer& functor, function_obj_ref_tag) + { + functor.obj_ref.obj_ptr = (void *)f.get_pointer(); + functor.obj_ref.is_const_qualified = is_const<FunctionObj>::value; + functor.obj_ref.is_volatile_qualified = is_volatile<FunctionObj>::value; + return true; + } + template<typename FunctionObj,typename Allocator> + bool + assign_to_a(const reference_wrapper<FunctionObj>& f, + function_buffer& functor, Allocator, function_obj_ref_tag) + { + return assign_to(f,functor,function_obj_ref_tag()); + } + + public: + vtable_base base; + invoker_type invoker; + }; + } // end namespace function + } // end namespace detail + + template< + typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS + > + class BOOST_FUNCTION_FUNCTION : public function_base + +#if BOOST_FUNCTION_NUM_ARGS == 1 + + , public std::unary_function<T0,R> + +#elif BOOST_FUNCTION_NUM_ARGS == 2 + + , public std::binary_function<T0,T1,R> + +#endif + + { + public: +#ifndef BOOST_NO_VOID_RETURNS + typedef R result_type; +#else + typedef typename boost::detail::function::function_return_type<R>::type + result_type; +#endif // BOOST_NO_VOID_RETURNS + + private: + typedef boost::detail::function::BOOST_FUNCTION_VTABLE< + R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS> + vtable_type; + + vtable_type* get_vtable() const { + return reinterpret_cast<vtable_type*>( + reinterpret_cast<std::size_t>(vtable) & ~(std::size_t)0x01); + } + + struct clear_type {}; + + public: + BOOST_STATIC_CONSTANT(int, args = BOOST_FUNCTION_NUM_ARGS); + + // add signature for boost::lambda + template<typename Args> + struct sig + { + typedef result_type type; + }; + +#if BOOST_FUNCTION_NUM_ARGS == 1 + typedef T0 argument_type; +#elif BOOST_FUNCTION_NUM_ARGS == 2 + typedef T0 first_argument_type; + typedef T1 second_argument_type; +#endif + + BOOST_STATIC_CONSTANT(int, arity = BOOST_FUNCTION_NUM_ARGS); + BOOST_FUNCTION_ARG_TYPES + + typedef BOOST_FUNCTION_FUNCTION self_type; + + BOOST_FUNCTION_FUNCTION() : function_base() { } + + // MSVC chokes if the following two constructors are collapsed into + // one with a default parameter. + template<typename Functor> + BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f +#ifndef BOOST_NO_SFINAE + ,typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + int>::type = 0 +#endif // BOOST_NO_SFINAE + ) : + function_base() + { + this->assign_to(f); + } + template<typename Functor,typename Allocator> + BOOST_FUNCTION_FUNCTION(Functor BOOST_FUNCTION_TARGET_FIX(const &) f, Allocator a +#ifndef BOOST_NO_SFINAE + ,typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + int>::type = 0 +#endif // BOOST_NO_SFINAE + ) : + function_base() + { + this->assign_to_a(f,a); + } + +#ifndef BOOST_NO_SFINAE + BOOST_FUNCTION_FUNCTION(clear_type*) : function_base() { } +#else + BOOST_FUNCTION_FUNCTION(int zero) : function_base() + { + BOOST_ASSERT(zero == 0); + } +#endif + + BOOST_FUNCTION_FUNCTION(const BOOST_FUNCTION_FUNCTION& f) : function_base() + { + this->assign_to_own(f); + } + + ~BOOST_FUNCTION_FUNCTION() { clear(); } + +#if BOOST_WORKAROUND(BOOST_MSVC, < 1300) + // MSVC 6.0 and prior require all definitions to be inline, but + // these definitions can become very costly. + result_type operator()(BOOST_FUNCTION_PARMS) const + { + if (this->empty()) + boost::throw_exception(bad_function_call()); + + return get_vtable()->invoker + (this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS); + } +#else + result_type operator()(BOOST_FUNCTION_PARMS) const; +#endif + + // The distinction between when to use BOOST_FUNCTION_FUNCTION and + // when to use self_type is obnoxious. MSVC cannot handle self_type as + // the return type of these assignment operators, but Borland C++ cannot + // handle BOOST_FUNCTION_FUNCTION as the type of the temporary to + // construct. + template<typename Functor> +#ifndef BOOST_NO_SFINAE + typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + BOOST_FUNCTION_FUNCTION&>::type +#else + BOOST_FUNCTION_FUNCTION& +#endif + operator=(Functor BOOST_FUNCTION_TARGET_FIX(const &) f) + { + this->clear(); + BOOST_TRY { + this->assign_to(f); + } BOOST_CATCH (...) { + vtable = 0; + BOOST_RETHROW; + } + BOOST_CATCH_END + return *this; + } + template<typename Functor,typename Allocator> + void assign(Functor BOOST_FUNCTION_TARGET_FIX(const &) f, Allocator a) + { + this->clear(); + BOOST_TRY{ + this->assign_to_a(f,a); + } BOOST_CATCH (...) { + vtable = 0; + BOOST_RETHROW; + } + BOOST_CATCH_END + } + +#ifndef BOOST_NO_SFINAE + BOOST_FUNCTION_FUNCTION& operator=(clear_type*) + { + this->clear(); + return *this; + } +#else + BOOST_FUNCTION_FUNCTION& operator=(int zero) + { + BOOST_ASSERT(zero == 0); + this->clear(); + return *this; + } +#endif + + // Assignment from another BOOST_FUNCTION_FUNCTION + BOOST_FUNCTION_FUNCTION& operator=(const BOOST_FUNCTION_FUNCTION& f) + { + if (&f == this) + return *this; + + this->clear(); + BOOST_TRY { + this->assign_to_own(f); + } BOOST_CATCH (...) { + vtable = 0; + BOOST_RETHROW; + } + BOOST_CATCH_END + return *this; + } + + void swap(BOOST_FUNCTION_FUNCTION& other) + { + if (&other == this) + return; + + BOOST_FUNCTION_FUNCTION tmp; + tmp.move_assign(*this); + this->move_assign(other); + other.move_assign(tmp); + } + + // Clear out a target, if there is one + void clear() + { + if (vtable) { + if (!this->has_trivial_copy_and_destroy()) + get_vtable()->clear(this->functor); + vtable = 0; + } + } + +#if (defined __SUNPRO_CC) && (__SUNPRO_CC <= 0x530) && !(defined BOOST_NO_COMPILER_CONFIG) + // Sun C++ 5.3 can't handle the safe_bool idiom, so don't use it + operator bool () const { return !this->empty(); } +#else + private: + struct dummy { + void nonnull() {}; + }; + + typedef void (dummy::*safe_bool)(); + + public: + operator safe_bool () const + { return (this->empty())? 0 : &dummy::nonnull; } + + bool operator!() const + { return this->empty(); } +#endif + + private: + void assign_to_own(const BOOST_FUNCTION_FUNCTION& f) + { + if (!f.empty()) { + this->vtable = f.vtable; + if (this->has_trivial_copy_and_destroy()) + this->functor = f.functor; + else + get_vtable()->base.manager(f.functor, this->functor, + boost::detail::function::clone_functor_tag); + } + } + + template<typename Functor> + void assign_to(Functor f) + { + using detail::function::vtable_base; + + typedef typename detail::function::get_function_tag<Functor>::type tag; + typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker; + typedef typename get_invoker:: + template apply<Functor, R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS> + handler_type; + + typedef typename handler_type::invoker_type invoker_type; + typedef typename handler_type::manager_type manager_type; + + // Note: it is extremely important that this initialization use + // static initialization. Otherwise, we will have a race + // condition here in multi-threaded code. See + // http://thread.gmane.org/gmane.comp.lib.boost.devel/164902/. + static vtable_type stored_vtable = + { { &manager_type::manage }, &invoker_type::invoke }; + + if (stored_vtable.assign_to(f, functor)) { + std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base); + if (boost::has_trivial_copy_constructor<Functor>::value && + boost::has_trivial_destructor<Functor>::value && + detail::function::function_allows_small_object_optimization<Functor>::value) + value |= (std::size_t)0x01; + vtable = reinterpret_cast<detail::function::vtable_base *>(value); + } else + vtable = 0; + } + + template<typename Functor,typename Allocator> + void assign_to_a(Functor f,Allocator a) + { + using detail::function::vtable_base; + + typedef typename detail::function::get_function_tag<Functor>::type tag; + typedef detail::function::BOOST_FUNCTION_GET_INVOKER<tag> get_invoker; + typedef typename get_invoker:: + template apply_a<Functor, R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS, + Allocator> + handler_type; + + typedef typename handler_type::invoker_type invoker_type; + typedef typename handler_type::manager_type manager_type; + + // Note: it is extremely important that this initialization use + // static initialization. Otherwise, we will have a race + // condition here in multi-threaded code. See + // http://thread.gmane.org/gmane.comp.lib.boost.devel/164902/. + static vtable_type stored_vtable = + { { &manager_type::manage }, &invoker_type::invoke }; + + if (stored_vtable.assign_to_a(f, functor, a)) { + std::size_t value = reinterpret_cast<std::size_t>(&stored_vtable.base); + if (boost::has_trivial_copy_constructor<Functor>::value && + boost::has_trivial_destructor<Functor>::value && + detail::function::function_allows_small_object_optimization<Functor>::value) + value |= (std::size_t)0x01; + vtable = reinterpret_cast<detail::function::vtable_base *>(value); + } else + vtable = 0; + } + + // Moves the value from the specified argument to *this. If the argument + // has its function object allocated on the heap, move_assign will pass + // its buffer to *this, and set the argument's buffer pointer to NULL. + void move_assign(BOOST_FUNCTION_FUNCTION& f) + { + if (&f == this) + return; + + BOOST_TRY { + if (!f.empty()) { + this->vtable = f.vtable; + if (this->has_trivial_copy_and_destroy()) + this->functor = f.functor; + else + get_vtable()->base.manager(f.functor, this->functor, + boost::detail::function::move_functor_tag); + f.vtable = 0; + } else { + clear(); + } + } BOOST_CATCH (...) { + vtable = 0; + BOOST_RETHROW; + } + BOOST_CATCH_END + } + }; + + template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + inline void swap(BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >& f1, + BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS + >& f2) + { + f1.swap(f2); + } + +#if !BOOST_WORKAROUND(BOOST_MSVC, < 1300) + template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + typename BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS>::result_type + inline + BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS> + ::operator()(BOOST_FUNCTION_PARMS) const + { + if (this->empty()) + boost::throw_exception(bad_function_call()); + + return get_vtable()->invoker + (this->functor BOOST_FUNCTION_COMMA BOOST_FUNCTION_ARGS); + } +#endif + +// Poison comparisons between boost::function objects of the same type. +template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + void operator==(const BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS>&, + const BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS>&); +template<typename R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_PARMS> + void operator!=(const BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS>&, + const BOOST_FUNCTION_FUNCTION< + R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_ARGS>& ); + +#if !defined(BOOST_FUNCTION_NO_FUNCTION_TYPE_SYNTAX) + +#if BOOST_FUNCTION_NUM_ARGS == 0 +#define BOOST_FUNCTION_PARTIAL_SPEC R (void) +#else +#define BOOST_FUNCTION_PARTIAL_SPEC R (BOOST_PP_ENUM_PARAMS(BOOST_FUNCTION_NUM_ARGS,T)) +#endif + +template<typename R BOOST_FUNCTION_COMMA + BOOST_FUNCTION_TEMPLATE_PARMS> +class function<BOOST_FUNCTION_PARTIAL_SPEC> + : public BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS> +{ + typedef BOOST_FUNCTION_FUNCTION<R BOOST_FUNCTION_COMMA BOOST_FUNCTION_TEMPLATE_ARGS> base_type; + typedef function self_type; + + struct clear_type {}; + +public: + + function() : base_type() {} + + template<typename Functor> + function(Functor f +#ifndef BOOST_NO_SFINAE + ,typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + int>::type = 0 +#endif + ) : + base_type(f) + { + } + template<typename Functor,typename Allocator> + function(Functor f, Allocator a +#ifndef BOOST_NO_SFINAE + ,typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + int>::type = 0 +#endif + ) : + base_type(f,a) + { + } + +#ifndef BOOST_NO_SFINAE + function(clear_type*) : base_type() {} +#endif + + function(const self_type& f) : base_type(static_cast<const base_type&>(f)){} + + function(const base_type& f) : base_type(static_cast<const base_type&>(f)){} + + self_type& operator=(const self_type& f) + { + self_type(f).swap(*this); + return *this; + } + + template<typename Functor> +#ifndef BOOST_NO_SFINAE + typename enable_if_c< + (boost::type_traits::ice_not< + (is_integral<Functor>::value)>::value), + self_type&>::type +#else + self_type& +#endif + operator=(Functor f) + { + self_type(f).swap(*this); + return *this; + } + +#ifndef BOOST_NO_SFINAE + self_type& operator=(clear_type*) + { + this->clear(); + return *this; + } +#endif + + self_type& operator=(const base_type& f) + { + self_type(f).swap(*this); + return *this; + } +}; + +#undef BOOST_FUNCTION_PARTIAL_SPEC +#endif // have partial specialization + +} // end namespace boost + +// Cleanup after ourselves... +#undef BOOST_FUNCTION_VTABLE +#undef BOOST_FUNCTION_COMMA +#undef BOOST_FUNCTION_FUNCTION +#undef BOOST_FUNCTION_FUNCTION_INVOKER +#undef BOOST_FUNCTION_VOID_FUNCTION_INVOKER +#undef BOOST_FUNCTION_FUNCTION_OBJ_INVOKER +#undef BOOST_FUNCTION_VOID_FUNCTION_OBJ_INVOKER +#undef BOOST_FUNCTION_FUNCTION_REF_INVOKER +#undef BOOST_FUNCTION_VOID_FUNCTION_REF_INVOKER +#undef BOOST_FUNCTION_MEMBER_INVOKER +#undef BOOST_FUNCTION_VOID_MEMBER_INVOKER +#undef BOOST_FUNCTION_GET_FUNCTION_INVOKER +#undef BOOST_FUNCTION_GET_FUNCTION_OBJ_INVOKER +#undef BOOST_FUNCTION_GET_FUNCTION_REF_INVOKER +#undef BOOST_FUNCTION_GET_MEM_FUNCTION_INVOKER +#undef BOOST_FUNCTION_GET_INVOKER +#undef BOOST_FUNCTION_TEMPLATE_PARMS +#undef BOOST_FUNCTION_TEMPLATE_ARGS +#undef BOOST_FUNCTION_PARMS +#undef BOOST_FUNCTION_PARM +#undef BOOST_FUNCTION_ARGS +#undef BOOST_FUNCTION_ARG_TYPE +#undef BOOST_FUNCTION_ARG_TYPES +#undef BOOST_FUNCTION_VOID_RETURN_TYPE +#undef BOOST_FUNCTION_RETURN + +#if defined(BOOST_MSVC) +# pragma warning( pop ) +#endif |