2006-11-30 Thierry GERAUD &lt;theo(a)tegucigalpa.lrde.epita.fr&gt; * stc/scoop.hh (stc_scoop_equipment_for_namespace): Rewrite. Index: stc/scoop.hh =================================================================== --- stc/scoop.hh (revision 711) +++ stc/scoop.hh (working copy) @@ -1,325 +1,835 @@ -// Copyright (C) 2005, 2006 EPITA Research and Development Laboratory -// -// This file is part of the Olena Library. This library is free -// software; you can redistribute it and/or modify it under the terms -// of the GNU General Public License version 2 as published by the -// Free Software Foundation. -// -// 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 02111-1307, 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 stc/vtypes.hh - - \brief Equipment for SCOOP: notably, Virtual types (also known as - ``properties'') mechanism. - - Based on Theo's presentation from January 2006 (olena-06-jan.pdf). */ - -#ifndef STC_SCOOP_HH -# define STC_SCOOP_HH - -# include <mlc/flags.hh> -# include <mlc/typedef.hh> -# include <mlc/ret.hh> - -# include <mlc/assert.hh> -# include <mlc/abort.hh> - -# include <mlc/bool.hh> - -# include <mlc/cmp.hh> -# include <mlc/if.hh> -# include <mlc/is_a.hh> - - -namespace stc -{ - - /// Error messages raised by static assertions/abortions. - namespace ERROR - { - - /// Errors from check_type_of_ and check_exact_type_of_. - /// \{ - struct VIRTUAL_TYPE_NOT_FOUND; - /// \} - - } // end of namespace stc::ERROR - -} // end of namespace stc - - - -# define stc_internal_get_typedef(Type, TypedefName) \ - typename TypedefName::template from_< Type >::ret - - -# define stc_internal_get_super(Type) \ - typename typedef_::super_type::template from_< Type >::ret - - - - - - -# define stc_scoop_equipment_for_namespace(SCOOPED_NAMESPACE) \ - \ -namespace SCOOPED_NAMESPACE \ -{ \ - \ - template <typename from_type> \ - struct set_super_type \ - { \ - typedef mlc::none ret; \ - }; \ - \ - template <typename type> \ - struct set_pseudosuper_type \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - template <typename from_type> \ - struct vtypes \ - { \ - }; \ - \ - template <typename from_type, typename type> \ - struct single_vtype \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - \ - namespace internal \ - { \ - \ - /* retrieve_from_single_vtype */ \ - \ - template <typename from_type, typename type> \ - struct retrieve_from_single_vtype; \ - \ - template <typename res, typename super, typename type> \ - struct helper_retrieve_from_single_vtype \ - { \ - typedef res ret; \ - }; \ - \ - template <typename super, typename type> \ - struct helper_retrieve_from_single_vtype < mlc::not_found, super, type > \ - { \ - typedef typename retrieve_from_single_vtype<super, type>::ret ret; \ - }; \ - \ - template <typename type> \ - struct helper_retrieve_from_single_vtype < mlc::not_found, mlc::none, type > \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - template <typename type> \ - struct helper_retrieve_from_single_vtype < mlc::not_found, mlc::not_found, type > \ - { \ - }; \ - \ - template <typename from_type, typename type> \ - struct retrieve_from_single_vtype \ - { \ - typedef SCOOPED_NAMESPACE::single_vtype<from_type, type> decl; \ - typedef typename decl::ret res; \ - typedef typename set_super_type<from_type>::ret super; \ - typedef typename helper_retrieve_from_single_vtype< res, super, type >::ret ret; \ - }; \ - \ - /* vtypes */ \ - \ - template <typename from_type, typename type> \ - struct retrieve_from_vtypes; \ - \ - template <typename res, typename super, typename type> \ - struct helper_retrieve_from_vtypes \ - { \ - typedef res ret; \ - }; \ - \ - template <typename super, typename type> \ - struct helper_retrieve_from_vtypes < mlc::not_found, super, type > \ - { \ - typedef typename retrieve_from_vtypes<super, type>::ret ret; \ - }; \ - \ - template <typename type> \ - struct helper_retrieve_from_vtypes < mlc::not_found, mlc::none, type > \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - template <typename type> \ - struct helper_retrieve_from_vtypes < mlc::not_found, mlc::not_found, type > \ - { \ - }; \ - \ - template <typename from_type, typename type> \ - struct retrieve_from_vtypes \ - { \ - typedef SCOOPED_NAMESPACE::vtypes<from_type> decl; \ - typedef stc_internal_get_typedef(decl, type) res; \ - typedef typename set_super_type<from_type>::ret super; \ - typedef typename helper_retrieve_from_vtypes< res, super, type >::ret ret; \ - }; \ - \ - /* pseudo super */ \ - \ - template <typename from_type> \ - struct retrieve_pseudosuper; \ - \ - template <typename res, typename super> \ - struct helper_retrieve_pseudosuper \ - { \ - typedef res ret; \ - }; \ - \ - template <typename super> \ - struct helper_retrieve_pseudosuper < mlc::not_found, super > \ - { \ - typedef typename retrieve_pseudosuper<super>::ret ret; \ - }; \ - \ - template <> \ - struct helper_retrieve_pseudosuper < mlc::not_found, mlc::none > \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - template <> \ - struct helper_retrieve_pseudosuper < mlc::not_found, mlc::not_found > \ - { \ - }; \ - \ - template <typename from_type> \ - struct retrieve_pseudosuper \ - { \ - typedef typename set_pseudosuper_type<from_type>::ret res; \ - typedef typename set_super_type<from_type>::ret super; \ - typedef typename helper_retrieve_pseudosuper< res, super >::ret ret; \ - }; \ - \ - /* scoop_vtype_of */ \ - \ - template <typename from_type, typename type> \ - struct step_from_vtypes; /* fwd decl of main entry */ \ - \ - /* step 3 <=> delegation */ \ - \ - template <typename from_type, typename type> \ - struct helper_step_from_delegation \ - { \ - /* REC */ \ - typedef typename step_from_vtypes<from_type, type>::ret ret; \ - }; \ - \ - template <typename type> \ - struct helper_step_from_delegation < mlc::not_found, type > \ - { \ - typedef mlc::not_found ret; \ - }; \ - \ - template <typename from_type, typename type> \ - struct step_from_delegation /* step 3 entry */ \ - { \ - typedef typename retrieve_pseudosuper<from_type>::ret pseudo_type; \ - typedef typename helper_step_from_delegation<pseudo_type, type>::ret ret; \ - }; \ - \ - /* step 2 <=> single_vtype */ \ - \ - template <typename res, typename from_type, typename type> \ - struct helper_step_from_single_vtype \ - { \ - typedef res ret; /* found! */ \ - }; \ - \ - template <typename from_type, typename type> \ - struct helper_step_from_single_vtype <mlc::not_found, /* => step 3 */ \ - from_type, type> \ - { \ - typedef typename step_from_delegation<from_type, type>::ret ret; \ - }; \ - \ - template <typename from_type, typename type> \ - struct helper_step_from_single_vtype <mlc::undefined, /* => step 3 */ \ - from_type, type> \ - { \ - typedef typename step_from_delegation<from_type, type>::ret ret; \ - }; \ - \ - template <typename from_type, typename type> \ - struct step_from_single_vtype /* step 2 entry */ \ - { \ - typedef typename retrieve_from_single_vtype<from_type, type>::ret res; \ - typedef typename helper_step_from_single_vtype< res, from_type, type>::ret ret; \ - }; \ - \ - /* step 1 <=> vtypes */ \ - \ - template <typename res, typename from_type, typename type> \ - struct helper_step_from_vtypes \ - { \ - typedef res ret; /* found! */ \ - }; \ - \ - template <typename from_type, typename type> \ - struct helper_step_from_vtypes <mlc::not_found, /* => step 2 */ \ - from_type, type> \ - { \ - typedef typename step_from_single_vtype<from_type, type>::ret ret; \ - }; \ - \ - template <typename from_type, typename type> \ - struct helper_step_from_vtypes <mlc::undefined, /* => step 2 */ \ - from_type, type> \ - { \ - typedef typename step_from_single_vtype<from_type, type>::ret ret; \ - }; \ - \ - template <typename from_type, typename type> \ - struct step_from_vtypes /* main entry (so step 1 entry) */ \ - { \ - typedef typename retrieve_from_vtypes<from_type, type>::ret res; \ - typedef typename helper_step_from_vtypes< res, from_type, type>::ret ret; \ - }; \ - \ - } /* end of namespace SCOOPED_NAMESPACE ::internal */ \ - \ - \ - template <typename from_type, typename type> \ - struct direct_type_of_ \ - { \ - typedef typename internal::step_from_vtypes<from_type, type>::ret ret; \ - }; \ - \ - \ -} /* end of namespace SCOOPED_NAMESPACE */ \ - \ -struct e_n_d__w_i_t_h___s_e_m_i_c_o_l_o_n - - - -#endif // ! STC_SCOOP_HH +// Copyright (C) 2005, 2006 EPITA Research and Development Laboratory +// +// This file is part of the Olena Library. This library is free +// software; you can redistribute it and/or modify it under the terms +// of the GNU General Public License version 2 as published by the +// Free Software Foundation. +// +// 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 02111-1307, 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 stc/vtypes.hh + + \brief Equipment for SCOOP: notably, Virtual types (also known as + ``properties'') mechanism. + + Based on Theo's presentation from January 2006 (olena-06-jan.pdf). */ + +#ifndef STC_SCOOP_HH +# define STC_SCOOP_HH + +# include <mlc/flags.hh> +# include <mlc/typedef.hh> +# include <mlc/ret.hh> +# include <mlc/assert.hh> +# include <mlc/abort.hh> +# include <mlc/bool.hh> +# include <mlc/pair.hh> +# include <mlc/cmp.hh> +# include <mlc/if.hh> +# include <mlc/is_a.hh> + + +namespace stc +{ + + struct not_delegated; + + struct abstract; + + template <typename T> + struct final; + +} // end of namespace stc + + + +#define stc_super(T) typename set_super_type< T >::ret +#define stc_stm(From, Target) typename get_stm< From , Target >::ret + + +# define stc_scoop_equipment_for_namespace(SCOOPED_NAMESPACE) \ + \ + \ +namespace SCOOPED_NAMESPACE \ +{ \ + \ + mlc_decl_typedef(delegatee_type); \ + \ + \ + template <typename from_type> \ + struct set_super_type \ + { \ + typedef mlc::none ret; \ + /* FIXME: nothing here! \ + * \ + * mlc::none is not a default value \ + * so that the client should define stoppers \ + */ \ + }; \ + \ + template <typename from_type> \ + struct vtypes \ + { \ + }; \ + \ + template <typename from_type, typename type> \ + struct single_vtype \ + { \ + typedef mlc::not_found ret; \ + }; \ + \ + \ + \ + namespace ERROR \ + { \ + \ + template < typename first_definition, \ + typename re_definition, \ + typename target > \ + struct final_vtype_redefined_; \ + \ + \ + template < typename first_definition, \ + typename declaration, \ + typename target > \ + struct vtype_declared_but_already_set_; \ + \ + \ + template < typename from, \ + typename target > \ + struct vtype_not_found; \ + \ + \ + template < typename curr, \ + typename target, \ + typename stm > \ + struct wrong_final_stm_; \ + \ + \ + template < typename target, \ + typename declaration, \ + typename from > \ + struct vtype_declared_but_not_defined; \ + \ + \ + template <typename T> \ + struct _declaration_is_in_; \ + \ + template <typename T> \ + struct _definition_is_looked_up_from_; \ + \ + \ + template <typename T> \ + struct _for_vtype_; \ + \ + \ + struct no_delegatee_declared_; \ + \ + \ + } /* end of namespace SCOOPED_NAMESPACE::ERROR */ \ + \ + \ + \ + namespace internal \ + { \ + \ + \ + /* \ + * Forward declarations. \ + */ \ + \ + \ + template <typename from, typename target> \ + struct get_stm; \ + \ + template <typename res1, typename res2> \ + struct helper_get_stm; \ + \ + template <typename from, typename target> \ + struct first_stm; \ + \ + template <typename curr, typename target, typename stm> \ + struct helper_first_stm; \ + \ + \ + template <typename from, typename target, typename curr = from> \ + struct superior_find; \ + \ + template <typename from, typename target, typename curr, typename stm> \ + struct helper_superior_find; \ + \ + template <typename from, typename target> \ + struct delegator_find; \ + \ + template <typename from, typename target, typename delegatee> \ + struct helper_delegator_find; \ + \ + template <typename from, typename target> \ + struct find; \ + \ + template <typename from, typename target, typename where, typename res> \ + struct helper_find; \ + \ + \ + \ + template <typename from, typename target> \ + struct check; \ + \ + template <typename curr, typename target, typename stm> \ + struct helper_check; \ + \ + \ + \ + /* get_stm(from, target) \ + * \ + * Returns the statement for class 'from' corresponding to 'target'. \ + * This statement is either defined in 'vtypes' or in 'single_vtype'. \ + * \ + * This routine is local; it does not recourse on superior classes. \ + * \ + */ \ + \ + template <typename res1> \ + struct helper_get_stm <res1, mlc::not_found> \ + { \ + typedef res1 ret; \ + }; \ + \ + template <typename res2> \ + struct helper_get_stm <mlc::not_found, res2> \ + { \ + typedef res2 ret; \ + }; \ + \ + template <> \ + struct helper_get_stm <mlc::not_found, mlc::not_found> \ + { \ + typedef mlc::not_found ret; \ + }; \ + \ + template <typename res1, typename res2> \ + struct helper_get_stm \ + { \ + /* error */ \ + }; \ + \ + template <typename from, typename target> \ + struct get_stm \ + { \ + typedef SCOOPED_NAMESPACE::vtypes<from> decl1; \ + typedef typename target::template from_<decl1>::ret res1; \ + \ + typedef SCOOPED_NAMESPACE::single_vtype<from, target> decl2; \ + typedef typename decl2::ret ret2; \ + \ + typedef typename helper_get_stm<res1, ret2>::ret ret; \ + }; \ + \ + \ + \ + \ + /* \ + * check_no_final_inherited \ + * \ + * FIXME: ... \ + */ \ + \ + template < typename orig, typename curr, typename target, \ + typename stm = typename get_stm<curr, target>::ret > \ + struct check_no_final_inherited \ + \ + : mlc::assert_< mlc_is_not_a(stm, stc::final), \ + ERROR::final_vtype_redefined_< orig, \ + mlc::pair_<curr, stm>, \ + target > \ + >, \ + /* rec */ check_no_final_inherited<orig, stc_super(curr), target> \ + { \ + }; \ + \ + template <typename orig, typename target, typename stm> \ + struct check_no_final_inherited <orig, /* if curr == */ mlc::none, target, stm> \ + { \ + }; \ + \ + \ + /* \ + * check_no_stm_inherited \ + * \ + * FIXME: ... \ + */ \ + \ + template < typename orig, typename curr, typename target, \ + typename stm = typename get_stm<curr, target>::ret > \ + struct check_no_stm_inherited \ + \ + : mlc::assert_< mlc::is_not_found_<stm>, \ + ERROR::vtype_declared_but_already_set_< orig, \ + mlc::pair_<curr, stm>, \ + target > \ + >, \ + /* rec */ check_no_stm_inherited<orig, stc_super(curr), target> \ + { \ + }; \ + \ + template <typename orig, typename target, typename stm> \ + struct check_no_stm_inherited <orig, /* if curr == */ mlc::none, target, stm> \ + { \ + }; \ + \ + \ + /* \ + * check_delegatee_inherited \ + */ \ + \ + template <typename curr, typename target> \ + struct check_delegatee_inherited \ + : mlc::assert_< mlc::is_found_< typename first_stm<curr, \ + typedef_::delegatee_type>::ret::second_elt >, \ + ERROR::no_delegatee_declared_ > \ + { \ + }; \ + \ + \ + /* \ + * check_final_stm \ + */ \ + \ + template <typename curr, typename target, typename stm> \ + struct check_final_stm \ + {}; \ + \ + template <typename curr, typename target> \ + struct check_final_stm < curr, target, stc::abstract > \ + : mlc::abort_< ERROR::wrong_final_stm_<curr, target, stc::final<stc::abstract> > > \ + {}; \ + \ + template <typename curr, typename target, typename T> \ + struct check_final_stm < curr, target, stc::final<T> > \ + : mlc::abort_< ERROR::wrong_final_stm_<curr, target, stc::final<stc::final<T> > > > \ + {}; \ + \ + template <typename curr, typename target> \ + struct check_final_stm < curr, target, stc::not_delegated > \ + : mlc::abort_< ERROR::wrong_final_stm_<curr, target, stc::final<stc::not_delegated> > > \ + {}; \ + \ + template <typename curr, typename target> \ + struct check_final_stm < curr, target, mlc::not_found > \ + : mlc::abort_< ERROR::wrong_final_stm_<curr, target, stc::final<mlc::not_found> > > \ + {}; \ + \ + \ + \ + \ + /* \ + * check(from, target) \ + * \ + * pseudo-code: \ + * \ + * check(from, target) \ + * { \ + * if (from == mlc::none) // stop because no more class \ + * return done; \ + * else \ + * return helper_check(from, target, get_stm(from, target)); \ + * } \ + */ \ + \ + struct dummy {}; \ + \ + template <typename target> \ + struct check < /* if from == */ mlc::none, target > \ + { \ + typedef dummy ret; \ + }; \ + \ + template <typename from, typename target> \ + struct check /* otherwise */ \ + { \ + typedef typename helper_check< from, target, \ + stc_stm(from, target) >::ret ret; \ + }; \ + \ + \ + \ + \ + /* \ + * pseudo-code: \ + * \ + * helper_check(curr, target, stm) \ + * { \ + * super = super(curr); \ + * \ + * if (stm == stc::abstract) { \ + * check_no_stm_inherited(curr, super, target); \ + * return check(super, target); \ + * } \ + * if (stm == stc::final<T>) { \ + * check_final_stm(T); \ + * check_no_final_inherited((curr, T), super, target); \ + * return check(super, target); \ + * } \ + * if (stm == stc::not_delegated) { \ + * check_delegatee_inherited(curr); \ + * check_no_final_inherited((curr, stc::not_delegated), super, target); \ + * return check(super, target); \ + * } \ + * if (stm == mlc::not_found) { \ + * return check(super, target); \ + * } \ + * // otherwise, non-final stm: \ + * if (stm == T) { \ + * check_no_final_inherited((curr, T), super, target); \ + * return check(super, target); \ + * } \ + * } \ + * \ + */ \ + \ + template <typename curr, typename target> \ + struct helper_check < curr, target, \ + /* if stm == */ stc::abstract > \ + : check_no_stm_inherited< mlc::pair_<curr, stc::abstract >, \ + stc_super(curr), \ + target > \ + { \ + typedef typename check<stc_super(curr), target>::ret ret; \ + }; \ + \ + template <typename curr, typename target, typename T> \ + struct helper_check < curr, target, \ + /* if stm == */ stc::final<T> > \ + : check_no_final_inherited< mlc::pair_<curr, stc::final<T> >, \ + stc_super(curr), \ + target > \ + { \ + /* FIXME: \ + check_final_stm(T); \ + */ \ + typedef typename check<stc_super(curr), target>::ret ret; \ + }; \ + \ + template <typename curr, typename target> \ + struct helper_check < curr, target, \ + /* if stm == */ stc::not_delegated > \ + : check_no_final_inherited< mlc::pair_<curr, stc::not_delegated>, \ + stc_super(curr), \ + target > \ + { \ + /* FIXME: \ + check_delegatee_inherited(curr); \ + */ \ + typedef typename check<stc_super(curr), target>::ret ret; \ + }; \ + \ + template <typename curr, typename target> \ + struct helper_check < curr, target, \ + /* if stm == */ mlc::not_found > \ + { \ + typedef typename check<stc_super(curr), target>::ret ret; \ + }; \ + \ + template <typename curr, typename target, typename stm> \ + struct helper_check /* otherwise, non-final stm */ \ + : check_no_final_inherited< mlc::pair_<curr, stm>, \ + stc_super(curr), \ + target > \ + { \ + typedef typename check<stc_super(curr), target>::ret ret; \ + }; \ + \ + \ + \ + \ + /* \ + * first_stm(from, target) \ + * \ + * returns a pair (Where, Value) with Value being: \ + * - stc::abstract \ + * - stc::not_delegated \ + * - mlc::not_found \ + * - a type T \ + * and Where being the class where the stm is found. \ + * \ + * \ + * helper_first_stm(curr, target, stm) \ + * { \ + * if (stm == mlc::not_found) \ + * return first_stm(super(curr), target); \ + * else if (stm == stc::final<T>) \ + * return pair(curr, T); \ + * else \ + * return pair(curr, stm); \ + * } \ + * \ + * first_stm(from, target) \ + * { \ + * if (from == mlc::none) \ + * return pair(mlc::none, mlc::not_found); \ + * else \ + * return helper_first_stm(from, target, \ + * get_stm(from, target)); \ + * } \ + * \ + */ \ + \ + template <typename curr, typename target> \ + struct helper_first_stm < curr, target, \ + /* if stm == */ mlc::not_found > \ + { \ + typedef typename first_stm<stc_super(curr), target>::ret ret; \ + }; \ + \ + template <typename curr, typename target, typename T> \ + struct helper_first_stm < curr, target, \ + /* if stm == */ stc::final<T> > \ + { \ + typedef mlc::pair_<curr, T> ret; \ + }; \ + \ + template <typename curr, typename target, typename stm> \ + struct helper_first_stm /* otherwise */ \ + { \ + typedef mlc::pair_<curr, stm> ret; \ + }; \ + \ + template <typename target> \ + struct first_stm < /* if from == */ mlc::none, target > \ + { \ + typedef mlc::pair_<mlc::none, mlc::not_found> ret; \ + }; \ + \ + template <typename from, typename target> \ + struct first_stm /* otherwise */ \ + { \ + typedef typename helper_first_stm<from, target, \ + stc_stm(from, target)>::ret ret; \ + }; \ + \ + \ + \ + /* \ + * superior_find(from, target) \ + * \ + * returns: \ + * either mlc::not_found \ + * or a type T \ + * behavior: \ + * - the stm stc::not_delegated is ignored \ + * - error when stc::abstract is reached \ + * \ + * helper_superior_find(from, target, curr, stm) \ + * { \ + * if (stm == stc::abstract) \ + * error("<target> declared in <curr> but not defined at <from>"); \ + * else if (stm == mlc::not_found or \ + * stm == stc::not_delegated) \ + * return superior_find(from, target, super(curr)); \ + * else if (stm == stc::final<T>) \ + * return T; \ + * else \ + * return stm; \ + * } \ + * \ + * superior_find(from, target, curr = from) \ + * { \ + * if (curr == mlc::none) \ + * return mlc::not_found; \ + * else \ + * return helper_superior_find(from, target, curr, \ + * get_stm(curr, target)); \ + * } \ + */ \ + \ + template <typename from, typename target, typename curr> \ + struct helper_superior_find < from, target, curr, \ + /* if stm == */ stc::abstract > \ + { \ + /* FIXME: error("<target> declared in <curr> but not defined at <from>"); */ \ + }; \ + \ + template <typename from, typename target, typename curr> \ + struct helper_superior_find < from, target, curr, \ + /* if stm == */ mlc::not_found > \ + { \ + typedef typename superior_find< from, target, \ + stc_super(curr) >::ret ret; \ + }; \ + \ + template <typename from, typename target, typename curr> \ + struct helper_superior_find < from, target, curr, \ + /* if stm == */ stc::not_delegated > \ + { \ + typedef typename superior_find< from, target, \ + stc_super(curr) >::ret ret; \ + }; \ + \ + template <typename from, typename target, typename curr, typename T> \ + struct helper_superior_find < from, target, curr, \ + /* if stm == */ stc::final<T> > \ + { \ + typedef T ret; \ + }; \ + \ + template <typename from, typename target, typename curr, typename stm> \ + struct helper_superior_find /* otherwise */ \ + { \ + typedef stm ret; \ + }; \ + \ + template <typename from, typename target> \ + struct superior_find < from, target, /* if curr == */ mlc::none > \ + { \ + typedef mlc::not_found ret; \ + }; \ + \ + template <typename from, typename target, typename curr> \ + struct superior_find /* otherwise */ \ + { \ + typedef typename helper_superior_find<from, target, curr, \ + stc_stm(curr, target)>::ret ret; \ + }; \ + \ + \ + \ + /* \ + * delegator_find(from, target) \ + * \ + * \ + * delegator_find(from, target) \ + * { \ + * precondition(target != delegatee_type); \ + * delegatee = superior_find(from, delegatee_type); \ + * if (delegatee == mlc::not_found) \ + * return mlc::not_found; \ + * else \ + * return find(delegatee, target); \ + * } \ + */ \ + \ + template <typename from, typename target> \ + struct helper_delegator_find < from, target, \ + /* if delegatee == */ mlc::not_found > \ + { \ + typedef mlc::not_found ret; \ + }; \ + \ + template <typename from, typename target, typename delegatee> \ + struct helper_delegator_find /* otherwise */ \ + { \ + typedef typename find<delegatee, target>::ret ret; \ + }; \ + \ + template <typename from, typename target> \ + struct delegator_find \ + { \ + typedef typename superior_find<from, typedef_::delegatee_type>::ret delegatee; \ + typedef typename helper_delegator_find<from, target, delegatee>::ret ret; \ + }; \ + \ + \ + \ + /* \ + * helper_find(from, target, where, res) \ + * \ + * \ + * \ + */ \ + \ + template <typename from, typename target, typename where> \ + struct helper_find < from, target, where, \ + /* if res == */ mlc::not_found > \ + { \ + typedef typename delegator_find<from, target>::ret ret; \ + }; \ + \ + template <typename from, typename target, typename where> \ + struct helper_find < from, target, where, \ + /* if res == */ stc::abstract > \ + { \ + typedef typename delegator_find<from, target>::ret res_d; \ + struct check_ \ + : mlc::assert_< mlc::is_found_<res_d>, \ + ERROR::vtype_declared_but_not_defined \ + < ERROR::_for_vtype_<target>, \ + ERROR::_declaration_is_in_<where>, \ + ERROR::_definition_is_looked_up_from_<from> > > \ + /* FIXME: error("<target> declared in <where> but not defined at <from>"); */ \ + { \ + typedef res_d ret; \ + }; \ + typedef typename check_::ret ret; \ + }; \ + \ + template <typename from, typename target, typename where> \ + struct helper_find < from, target, where, \ + /* if res == */ stc::not_delegated > \ + { \ + typedef typename superior_find<from, target>::ret ret; \ + }; \ + \ + template <typename from, typename target, typename where, typename res> \ + struct helper_find /* otherwise */ \ + { \ + typedef res ret; \ + }; \ + \ + \ + \ + /* \ + * find(from, target) \ + * \ + * FIXME: ... \ + * \ + * find(from, target) \ + * { \ + * if (target == delegatee_type) \ + * return superior_find(from, delegatee_type); \ + * else \ + * return helper_find(from, target); \ + * } \ + */ \ + \ + template <typename from> \ + struct find <from, /* if target == */ typedef_::delegatee_type > \ + { \ + typedef typename superior_find<from, typedef_::delegatee_type>::ret ret; \ + }; \ + \ + template <typename from, typename target> \ + struct find /* otherwise */ \ + { \ + typedef typename first_stm<from, target>::ret stm; \ + typedef mlc_elt(stm, 1) where; \ + typedef mlc_elt(stm, 2) res; \ + typedef typename helper_find<from, target, \ + where, res>::ret ret; \ + }; \ + \ + \ + } /* end of SCOOPED_NAMESPACE::internal */ \ + \ + \ + /* \ + * find_vtype(from, target) \ + * \ + * FIXME:... \ + * \ + */ \ + \ + template <typename from, typename target> \ + struct deferred_vtype \ + { \ + typedef typename internal::find<from, target>::ret ret; \ + }; \ + \ + template <typename from, typename target> \ + struct find_vtype \ + { \ + typedef typename internal::find<from, target>::ret ret; \ + typedef typename internal::check<from, target>::ret chk; \ + }; \ + \ + template <typename from, typename target> \ + struct vtype \ + { \ + typedef typename find_vtype<from, target>::ret res; \ + struct check_ : mlc::assert_< mlc::is_found_<res> > \ + { \ + typedef res ret; \ + }; \ + typedef typename check_::ret ret; \ + }; \ + \ + \ +} /* end of SCOOPED_NAMESPACE */ \ + \ + \ +struct e_n_d__w_i_t_h___s_e_m_i_c_o_l_o_n; + + + +# define stc_find_vtype_(Namespace, From, Target) \ + Namespace::find_vtype<From, Namespace::typedef_::Target##_type>::ret + +# define stc_find_vtype(Namespace, From, Target) \ + typename stc_find_vtype_(Namespace, From, Target) + + + +# define stc_deferred_vtype(Namespace, From, Target) \ + typename Namespace::deferred_vtype<From, Namespace::typedef_::Target##_type>::ret + + + +# define stc_vtype_(Namespace, From, Target) \ + Namespace::vtype<From, Namespace::typedef_::Target##_type>::ret + +# define stc_vtype(Namespace, From, Target) \ + typename stc_vtype_(Namespace, From, Target) + + + +# define stc_find_deduce_vtype_(Namespace, From, Target1, Target2) \ + Namespace::find_vtype< Namespace::find_vtype<From, \ + Namespace::typedef_::Target1##_type>::ret, \ + Namespace::typedef_::Target2##_type>::ret + +# define stc_find_deduce_vtype(Namespace, From, Target) \ + typename \ + Namespace::find_vtype< typename \ + Namespace::find_vtype<From, \ + Namespace::typedef_::Target1##_type>::ret, \ + Namespace::typedef_::Target2##_type>::ret + + + +# define stc_deduce_deferred_vtype(Namespace, From, Target1, Target2) \ + typename \ + Namespace::deferred_vtype< typename \ + Namespace::deferred_vtype<From, \ + Namespace::typedef_::Target1##_type>::ret, \ + Namespace::typedef_::Target2##_type>::ret \ + + + +# define stc_deduce_vtype_(Namespace, From, Target1, Target2) \ + Namespace::vtype< Namespace::vtype<From, \ + Namespace::typedef_::Target1##_type>::ret, \ + Namespace::typedef_::Target2##_type>::ret + +# define stc_deduce_vtype(Namespace, From, Target1, Target2) \ + typename \ + Namespace::vtype< typename \ + Namespace::vtype<From, \ + Namespace::typedef_::Target1##_type>::ret, \ + Namespace::typedef_::Target2##_type>::ret + + + + + +// # define stc_vtype_is_found_(Namespace, From, Target) +// mlc::is_found_< Namespace::find_vtype<From, Namespace::typedef_::Target##_type>::ret > + + +#endif // ! STC_SCOOP_HH