| // TR1 functional -*- C++ -*- |
| |
| // Copyright (C) 2005, 2006 Free Software Foundation, Inc. |
| // Written by Douglas Gregor <doug.gregor -at- gmail.com> |
| // |
| // This file is part of the GNU ISO C++ Library. This library is free |
| // software; you can redistribute it and/or modify it under the |
| // terms of the GNU General Public License as published by the |
| // Free Software Foundation; either version 2, or (at your option) |
| // any later version. |
| |
| // This library is distributed in the hope that it will be useful, |
| // but WITHOUT ANY WARRANTY; without even the implied warranty of |
| // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| // GNU General Public License for more details. |
| |
| // You should have received a copy of the GNU General Public License along |
| // with this library; see the file COPYING. If not, write to the Free |
| // Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, |
| // USA. |
| |
| // As a special exception, you may use this file as part of a free software |
| // library without restriction. Specifically, if other files instantiate |
| // templates or use macros or inline functions from this file, or you compile |
| // this file and link it with other files to produce an executable, this |
| // file does not by itself cause the resulting executable to be covered by |
| // the GNU General Public License. This exception does not however |
| // invalidate any other reasons why the executable file might be covered by |
| // the GNU General Public License. |
| |
| /** @file tr1/functional_iterate.h |
| * This is an internal header file, included by other library headers. |
| * You should not attempt to use it directly. |
| */ |
| |
| namespace std |
| { |
| _GLIBCXX_BEGIN_NAMESPACE(tr1) |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| struct _Weak_result_type_impl<_Res(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| typedef _Res result_type; |
| }; |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| struct _Weak_result_type_impl<_Res (&)(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| typedef _Res result_type; |
| }; |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| struct _Weak_result_type_impl<_Res (*)(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| typedef _Res result_type; |
| }; |
| |
| #if _GLIBCXX_NUM_ARGS > 0 |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| struct _Weak_result_type_impl< |
| _Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED)> |
| { |
| typedef _Res result_type; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| struct _Weak_result_type_impl< |
| _Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const> |
| { |
| typedef _Res result_type; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| struct _Weak_result_type_impl< |
| _Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile> |
| { |
| typedef _Res result_type; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| struct _Weak_result_type_impl< |
| _Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const volatile> |
| { |
| typedef _Res result_type; |
| }; |
| #endif |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| : public _Result_of_impl< |
| _Has_result_type<_Weak_result_type<_Functor> >::value, |
| _Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| { }; |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| struct _Result_of_impl<true, _Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| typedef typename _Weak_result_type<_Functor>::result_type type; |
| }; |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| struct _Result_of_impl<false, _Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| #if _GLIBCXX_NUM_ARGS > 0 |
| typedef typename _Functor |
| ::template result<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type type; |
| #else |
| typedef void type; |
| #endif |
| }; |
| |
| /** |
| * @if maint |
| * Invoke a function object, which may be either a member pointer or a |
| * function object. The first parameter will tell which. |
| * @endif |
| */ |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| inline |
| typename __gnu_cxx::__enable_if<(!is_member_pointer<_Functor>::value |
| && !is_function<_Functor>::value |
| && !is_function<typename remove_pointer<_Functor>::type>::value), |
| typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type>::__type |
| __invoke(_Functor& __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS) |
| { |
| return __f(_GLIBCXX_ARGS); |
| } |
| |
| #if _GLIBCXX_NUM_ARGS > 0 |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| inline |
| typename __gnu_cxx::__enable_if<(is_member_pointer<_Functor>::value |
| && !is_function<_Functor>::value |
| && !is_function<typename remove_pointer<_Functor>::type>::value), |
| typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type |
| >::__type |
| __invoke(_Functor& __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS) |
| { |
| return mem_fn(__f)(_GLIBCXX_ARGS); |
| } |
| #endif |
| |
| // To pick up function references (that will become function pointers) |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| inline |
| typename __gnu_cxx::__enable_if<(is_pointer<_Functor>::value |
| && is_function<typename remove_pointer<_Functor>::type>::value), |
| typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type |
| >::__type |
| __invoke(_Functor __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS) |
| { |
| return __f(_GLIBCXX_ARGS); |
| } |
| |
| /** |
| * @if maint |
| * Implementation of reference_wrapper::operator() |
| * @endif |
| */ |
| #if _GLIBCXX_NUM_ARGS > 0 |
| template<typename _Tp> |
| template<_GLIBCXX_TEMPLATE_PARAMS> |
| typename result_of< |
| typename reference_wrapper<_Tp>::_M_func_type(_GLIBCXX_TEMPLATE_ARGS)>::type |
| reference_wrapper<_Tp>::operator()(_GLIBCXX_REF_PARAMS) const |
| { |
| return __invoke(get(), _GLIBCXX_ARGS); |
| } |
| #endif |
| |
| #if _GLIBCXX_NUM_ARGS > 0 |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED)> |
| #if _GLIBCXX_NUM_ARGS == 1 |
| : public unary_function<_Class*, _Res> |
| #elif _GLIBCXX_NUM_ARGS == 2 |
| : public binary_function<_Class*, _T1, _Res> |
| #endif |
| { |
| typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED); |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| public: |
| typedef _Res result_type; |
| |
| explicit _Mem_fn(_Functor __pf) : __pmf(__pf) { } |
| |
| // Handle objects |
| _Res |
| operator()(_Class& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle pointers |
| _Res |
| operator()(_Class* __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle smart pointers, references and pointers to derived |
| template<typename _Tp> |
| _Res |
| operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { |
| return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_ARGS_SHIFTED); |
| } |
| |
| private: |
| _Functor __pmf; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const> |
| #if _GLIBCXX_NUM_ARGS == 1 |
| : public unary_function<const _Class*, _Res> |
| #elif _GLIBCXX_NUM_ARGS == 2 |
| : public binary_function<const _Class*, _T1, _Res> |
| #endif |
| { |
| typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const; |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| public: |
| typedef _Res result_type; |
| |
| explicit _Mem_fn(_Functor __pf) : __pmf(__pf) { } |
| |
| // Handle objects |
| _Res |
| operator()(const _Class& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle pointers |
| _Res |
| operator()(const _Class* __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle smart pointers, references and pointers to derived |
| template<typename _Tp> |
| _Res |
| operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { |
| return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_ARGS_SHIFTED); |
| } |
| |
| private: |
| _Functor __pmf; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile> |
| #if _GLIBCXX_NUM_ARGS == 1 |
| : public unary_function<volatile _Class*, _Res> |
| #elif _GLIBCXX_NUM_ARGS == 2 |
| : public binary_function<volatile _Class*, _T1, _Res> |
| #endif |
| { |
| typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile; |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| public: |
| typedef _Res result_type; |
| |
| explicit _Mem_fn(_Functor __pf) : __pmf(__pf) { } |
| |
| // Handle objects |
| _Res |
| operator()(volatile _Class& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle pointers |
| _Res |
| operator()(volatile _Class* __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle smart pointers, references and pointers to derived |
| template<typename _Tp> |
| _Res |
| operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { |
| return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_ARGS_SHIFTED); |
| } |
| private: |
| _Functor __pmf; |
| }; |
| |
| template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_TEMPLATE_PARAMS_SHIFTED> |
| class _Mem_fn<_Res(_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const volatile> |
| #if _GLIBCXX_NUM_ARGS == 1 |
| : public unary_function<const volatile _Class*, _Res> |
| #elif _GLIBCXX_NUM_ARGS == 2 |
| : public binary_function<const volatile _Class*, _T1, _Res> |
| #endif |
| { |
| typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) |
| const volatile; |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| template<typename _Tp> |
| _Res |
| _M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| public: |
| typedef _Res result_type; |
| |
| explicit _Mem_fn(_Functor __pf) : __pmf(__pf) { } |
| |
| // Handle objects |
| _Res |
| operator()(const volatile _Class& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle pointers |
| _Res |
| operator()(const volatile _Class* __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); } |
| |
| // Handle smart pointers, references and pointers to derived |
| template<typename _Tp> |
| _Res |
| operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_PARAMS_SHIFTED) const |
| { |
| return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED |
| _GLIBCXX_ARGS_SHIFTED); |
| } |
| |
| private: |
| _Functor __pmf; |
| }; |
| #endif |
| |
| #if _GLIBCXX_NUM_ARGS > 0 |
| namespace placeholders |
| { |
| namespace |
| { |
| _Placeholder<_GLIBCXX_NUM_ARGS> _GLIBCXX_JOIN(_,_GLIBCXX_NUM_ARGS); |
| } // anonymous namespace |
| } |
| #endif |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Bind<_Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| : public _Weak_result_type<_Functor> |
| { |
| typedef _Bind __self_type; |
| |
| _Functor _M_f; |
| _GLIBCXX_BIND_MEMBERS |
| |
| public: |
| #if _GLIBCXX_NUM_ARGS == 0 |
| explicit |
| #endif |
| _Bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| : _M_f(__f) _GLIBCXX_COMMA _GLIBCXX_BIND_MEMBERS_INIT { } |
| |
| #define _GLIBCXX_BIND_REPEAT_HEADER <tr1/bind_iterate.h> |
| #include <tr1/bind_repeat.h> |
| #undef _GLIBCXX_BIND_REPEAT_HEADER |
| }; |
| |
| template<typename _Result, typename _Functor |
| _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Bind_result<_Result, _Functor(_GLIBCXX_TEMPLATE_ARGS)> |
| { |
| _Functor _M_f; |
| _GLIBCXX_BIND_MEMBERS |
| |
| public: |
| typedef _Result result_type; |
| |
| #if _GLIBCXX_NUM_ARGS == 0 |
| explicit |
| #endif |
| _Bind_result(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| : _M_f(__f) _GLIBCXX_COMMA _GLIBCXX_BIND_MEMBERS_INIT { } |
| |
| #define _GLIBCXX_BIND_REPEAT_HEADER <tr1/bind_iterate.h> |
| #define _GLIBCXX_BIND_HAS_RESULT_TYPE |
| #include <tr1/bind_repeat.h> |
| #undef _GLIBCXX_BIND_HAS_RESULT_TYPE |
| #undef _GLIBCXX_BIND_REPEAT_HEADER |
| }; |
| |
| // Handle arbitrary function objects |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| inline |
| _Bind<typename _Maybe_wrap_member_pointer<_Functor>::type |
| (_GLIBCXX_TEMPLATE_ARGS)> |
| bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type; |
| typedef typename __maybe_type::type __functor_type; |
| typedef _Bind<__functor_type(_GLIBCXX_TEMPLATE_ARGS)> __result_type; |
| return __result_type(__maybe_type::__do_wrap(__f) |
| _GLIBCXX_COMMA _GLIBCXX_ARGS); |
| } |
| |
| template<typename _Result, typename _Functor |
| _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| inline |
| _Bind_result<_Result, |
| typename _Maybe_wrap_member_pointer<_Functor>::type |
| (_GLIBCXX_TEMPLATE_ARGS)> |
| bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type; |
| typedef typename __maybe_type::type __functor_type; |
| typedef _Bind_result<_Result, __functor_type(_GLIBCXX_TEMPLATE_ARGS)> |
| __result_type; |
| return __result_type(__maybe_type::__do_wrap(__f) |
| _GLIBCXX_COMMA _GLIBCXX_ARGS); |
| } |
| |
| template<typename _Res, typename _Functor _GLIBCXX_COMMA |
| _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Functor> |
| : public _Function_base::_Base_manager<_Functor> |
| { |
| typedef _Function_base::_Base_manager<_Functor> _Base; |
| |
| public: |
| static _Res |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| return (*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Functor> |
| : public _Function_base::_Base_manager<_Functor> |
| { |
| typedef _Function_base::_Base_manager<_Functor> _Base; |
| |
| public: |
| static void |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| (*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Res, typename _Functor _GLIBCXX_COMMA |
| _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), |
| reference_wrapper<_Functor> > |
| : public _Function_base::_Ref_manager<_Functor> |
| { |
| typedef _Function_base::_Ref_manager<_Functor> _Base; |
| |
| public: |
| static _Res |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| return __callable_functor(**_Base::_M_get_pointer(__functor)) |
| (_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), |
| reference_wrapper<_Functor> > |
| : public _Function_base::_Ref_manager<_Functor> |
| { |
| typedef _Function_base::_Ref_manager<_Functor> _Base; |
| |
| public: |
| static void |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| __callable_functor(**_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Class, typename _Member, typename _Res |
| _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*> |
| : public _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*> |
| { |
| typedef _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*> |
| _Base; |
| |
| public: |
| static _Res |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| return std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value) |
| (_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Class, typename _Member |
| _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*> |
| : public _Function_base::_Base_manager< |
| _Simple_type_wrapper< _Member _Class::* > > |
| { |
| typedef _Member _Class::* _Functor; |
| typedef _Simple_type_wrapper< _Functor > _Wrapper; |
| typedef _Function_base::_Base_manager<_Wrapper> _Base; |
| |
| public: |
| static bool |
| _M_manager(_Any_data& __dest, const _Any_data& __source, |
| _Manager_operation __op) |
| { |
| switch (__op) { |
| case __get_type_info: |
| __dest._M_access<const type_info*>() = &typeid(_Functor); |
| break; |
| |
| case __get_functor_ptr: |
| __dest._M_access<_Functor*>() = |
| &_Base::_M_get_pointer(__source)->__value; |
| break; |
| |
| default: |
| _Base::_M_manager(__dest, __source, __op); |
| } |
| return false; |
| } |
| |
| static void |
| _M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS) |
| { |
| std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value) |
| (_GLIBCXX_ARGS); |
| } |
| }; |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| class function<_Res(_GLIBCXX_TEMPLATE_ARGS)> |
| #if _GLIBCXX_NUM_ARGS == 1 |
| : public unary_function<_T1, _Res>, private _Function_base |
| #elif _GLIBCXX_NUM_ARGS == 2 |
| : public binary_function<_T1, _T2, _Res>, private _Function_base |
| #else |
| : private _Function_base |
| #endif |
| { |
| /** |
| * @if maint |
| * This class is used to implement the safe_bool idiom. |
| * @endif |
| */ |
| struct _Hidden_type |
| { |
| _Hidden_type* _M_bool; |
| }; |
| |
| /** |
| * @if maint |
| * This typedef is used to implement the safe_bool idiom. |
| * @endif |
| */ |
| typedef _Hidden_type* _Hidden_type::* _Safe_bool; |
| |
| typedef _Res _Signature_type(_GLIBCXX_TEMPLATE_ARGS); |
| |
| struct _Useless {}; |
| |
| public: |
| typedef _Res result_type; |
| |
| // [3.7.2.1] construct/copy/destroy |
| |
| /** |
| * @brief Default construct creates an empty function call wrapper. |
| * @post @c !(bool)*this |
| */ |
| function() : _Function_base() { } |
| |
| /** |
| * @brief Default construct creates an empty function call wrapper. |
| * @post @c !(bool)*this |
| */ |
| function(_M_clear_type*) : _Function_base() { } |
| |
| /** |
| * @brief %Function copy constructor. |
| * @param x A %function object with identical call signature. |
| * @pre @c (bool)*this == (bool)x |
| * |
| * The newly-created %function contains a copy of the target of @a |
| * x (if it has one). |
| */ |
| function(const function& __x); |
| |
| /** |
| * @brief Builds a %function that targets a copy of the incoming |
| * function object. |
| * @param f A %function object that is callable with parameters of |
| * type @c T1, @c T2, ..., @c TN and returns a value convertible |
| * to @c Res. |
| * |
| * The newly-created %function object will target a copy of @a |
| * f. If @a f is @c reference_wrapper<F>, then this function |
| * object will contain a reference to the function object @c |
| * f.get(). If @a f is a NULL function pointer or NULL |
| * pointer-to-member, the newly-created object will be empty. |
| * |
| * If @a f is a non-NULL function pointer or an object of type @c |
| * reference_wrapper<F>, this function will not throw. |
| */ |
| template<typename _Functor> |
| function(_Functor __f, |
| typename __gnu_cxx::__enable_if<!is_integral<_Functor>::value, _Useless>::__type = _Useless()); |
| |
| /** |
| * @brief %Function assignment operator. |
| * @param x A %function with identical call signature. |
| * @post @c (bool)*this == (bool)x |
| * @returns @c *this |
| * |
| * The target of @a x is copied to @c *this. If @a x has no |
| * target, then @c *this will be empty. |
| * |
| * If @a x targets a function pointer or a reference to a function |
| * object, then this operation will not throw an exception. |
| */ |
| function& operator=(const function& __x) |
| { |
| function(__x).swap(*this); |
| return *this; |
| } |
| |
| /** |
| * @brief %Function assignment to zero. |
| * @post @c !(bool)*this |
| * @returns @c *this |
| * |
| * The target of @a *this is deallocated, leaving it empty. |
| */ |
| function& operator=(_M_clear_type*) |
| { |
| if (_M_manager) { |
| _M_manager(_M_functor, _M_functor, __destroy_functor); |
| _M_manager = 0; |
| _M_invoker = 0; |
| } |
| return *this; |
| } |
| |
| /** |
| * @brief %Function assignment to a new target. |
| * @param f A %function object that is callable with parameters of |
| * type @c T1, @c T2, ..., @c TN and returns a value convertible |
| * to @c Res. |
| * @return @c *this |
| * |
| * This %function object wrapper will target a copy of @a |
| * f. If @a f is @c reference_wrapper<F>, then this function |
| * object will contain a reference to the function object @c |
| * f.get(). If @a f is a NULL function pointer or NULL |
| * pointer-to-member, @c this object will be empty. |
| * |
| * If @a f is a non-NULL function pointer or an object of type @c |
| * reference_wrapper<F>, this function will not throw. |
| */ |
| template<typename _Functor> |
| typename __gnu_cxx::__enable_if<!is_integral<_Functor>::value, function&>::__type |
| operator=(_Functor __f) |
| { |
| function(__f).swap(*this); |
| return *this; |
| } |
| |
| // [3.7.2.2] function modifiers |
| |
| /** |
| * @brief Swap the targets of two %function objects. |
| * @param f A %function with identical call signature. |
| * |
| * Swap the targets of @c this function object and @a f. This |
| * function will not throw an exception. |
| */ |
| void swap(function& __x) |
| { |
| _Any_data __old_functor = _M_functor; |
| _M_functor = __x._M_functor; |
| __x._M_functor = __old_functor; |
| _Manager_type __old_manager = _M_manager; |
| _M_manager = __x._M_manager; |
| __x._M_manager = __old_manager; |
| _Invoker_type __old_invoker = _M_invoker; |
| _M_invoker = __x._M_invoker; |
| __x._M_invoker = __old_invoker; |
| } |
| |
| // [3.7.2.3] function capacity |
| |
| /** |
| * @brief Determine if the %function wrapper has a target. |
| * |
| * @return @c true when this %function object contains a target, |
| * or @c false when it is empty. |
| * |
| * This function will not throw an exception. |
| */ |
| operator _Safe_bool() const |
| { |
| if (_M_empty()) |
| { |
| return 0; |
| } |
| else |
| { |
| return &_Hidden_type::_M_bool; |
| } |
| } |
| |
| // [3.7.2.4] function invocation |
| |
| /** |
| * @brief Invokes the function targeted by @c *this. |
| * @returns the result of the target. |
| * @throws bad_function_call when @c !(bool)*this |
| * |
| * The function call operator invokes the target function object |
| * stored by @c this. |
| */ |
| _Res operator()(_GLIBCXX_PARAMS) const; |
| |
| // [3.7.2.5] function target access |
| /** |
| * @brief Determine the type of the target of this function object |
| * wrapper. |
| * |
| * @returns the type identifier of the target function object, or |
| * @c typeid(void) if @c !(bool)*this. |
| * |
| * This function will not throw an exception. |
| */ |
| const type_info& target_type() const; |
| |
| /** |
| * @brief Access the stored target function object. |
| * |
| * @return Returns a pointer to the stored target function object, |
| * if @c typeid(Functor).equals(target_type()); otherwise, a NULL |
| * pointer. |
| * |
| * This function will not throw an exception. |
| */ |
| template<typename _Functor> _Functor* target(); |
| |
| /** |
| * @overload |
| */ |
| template<typename _Functor> const _Functor* target() const; |
| |
| private: |
| // [3.7.2.6] undefined operators |
| template<typename _Function> |
| void operator==(const function<_Function>&) const; |
| template<typename _Function> |
| void operator!=(const function<_Function>&) const; |
| |
| typedef _Res (*_Invoker_type)(const _Any_data& _GLIBCXX_COMMA |
| _GLIBCXX_PARAMS); |
| _Invoker_type _M_invoker; |
| }; |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::function(const function& __x) |
| : _Function_base() |
| { |
| if (__x) { |
| _M_invoker = __x._M_invoker; |
| _M_manager = __x._M_manager; |
| __x._M_manager(_M_functor, __x._M_functor, __clone_functor); |
| } |
| } |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| template<typename _Functor> |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)> |
| ::function(_Functor __f, |
| typename __gnu_cxx::__enable_if<!is_integral<_Functor>::value, _Useless>::__type) |
| : _Function_base() |
| { |
| typedef _Function_handler<_Signature_type, _Functor> _My_handler; |
| if (_My_handler::_M_not_empty_function(__f)) { |
| _M_invoker = &_My_handler::_M_invoke; |
| _M_manager = &_My_handler::_M_manager; |
| _My_handler::_M_init_functor(_M_functor, __f); |
| } |
| } |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| _Res |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::operator()(_GLIBCXX_PARAMS) const |
| { |
| if (_M_empty()) |
| { |
| #if __EXCEPTIONS |
| throw bad_function_call(); |
| #else |
| std::abort(); |
| #endif |
| } |
| return _M_invoker(_M_functor _GLIBCXX_COMMA _GLIBCXX_ARGS); |
| } |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| const type_info& |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target_type() const |
| { |
| if (_M_manager) |
| { |
| _Any_data __typeinfo_result; |
| _M_manager(__typeinfo_result, _M_functor, __get_type_info); |
| return *__typeinfo_result._M_access<const type_info*>(); |
| } |
| else |
| { |
| return typeid(void); |
| } |
| } |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| template<typename _Functor> |
| _Functor* |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target() |
| { |
| if (typeid(_Functor) == target_type() && _M_manager) |
| { |
| _Any_data __ptr; |
| if (_M_manager(__ptr, _M_functor, __get_functor_ptr) |
| && !is_const<_Functor>::value) |
| return 0; |
| else |
| return __ptr._M_access<_Functor*>(); |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS> |
| template<typename _Functor> |
| const _Functor* |
| function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target() const |
| { |
| if (typeid(_Functor) == target_type() && _M_manager) |
| { |
| _Any_data __ptr; |
| _M_manager(__ptr, _M_functor, __get_functor_ptr); |
| return __ptr._M_access<const _Functor*>(); |
| } |
| else |
| { |
| return 0; |
| } |
| } |
| |
| _GLIBCXX_END_NAMESPACE |
| } |