Edit File: synth_access_traits.hpp
// -*- C++ -*- // Copyright (C) 2005-2018 Free Software Foundation, Inc. // // 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 3, 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. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License and // a copy of the GCC Runtime Library Exception along with this program; // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see // <http://www.gnu.org/licenses/>. // Copyright (C) 2004 Ami Tavory and Vladimir Dreizin, IBM-HRL. // Permission to use, copy, modify, sell, and distribute this software // is hereby granted without fee, provided that the above copyright // notice appears in all copies, and that both that copyright notice // and this permission notice appear in supporting documentation. None // of the above authors, nor IBM Haifa Research Laboratories, make any // representation about the suitability of this software for any // purpose. It is provided "as is" without express or implied // warranty. /** * @file pat_trie_/synth_access_traits.hpp * Contains an implementation class for a patricia tree. */ #ifndef PB_DS_SYNTH_E_ACCESS_TRAITS_HPP #define PB_DS_SYNTH_E_ACCESS_TRAITS_HPP #include <ext/pb_ds/detail/type_utils.hpp> namespace __gnu_pbds { namespace detail { #define PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC \ template<typename Type_Traits, bool Set, typename _ATraits> #define PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC \ synth_access_traits<Type_Traits, Set, _ATraits> /// Synthetic element access traits. template<typename Type_Traits, bool Set, typename _ATraits> struct synth_access_traits : public _ATraits { typedef _ATraits base_type; typedef typename base_type::const_iterator const_iterator; typedef Type_Traits type_traits; typedef typename type_traits::const_reference const_reference; typedef typename type_traits::key_const_reference key_const_reference; synth_access_traits(); synth_access_traits(const base_type&); inline bool equal_prefixes(const_iterator, const_iterator, const_iterator, const_iterator, bool compare_after = true) const; bool equal_keys(key_const_reference, key_const_reference) const; bool cmp_prefixes(const_iterator, const_iterator, const_iterator, const_iterator, bool compare_after = false) const; bool cmp_keys(key_const_reference, key_const_reference) const; inline static key_const_reference extract_key(const_reference); #ifdef _GLIBCXX_DEBUG bool operator()(key_const_reference, key_const_reference); #endif private: inline static key_const_reference extract_key(const_reference, true_type); inline static key_const_reference extract_key(const_reference, false_type); static integral_constant<int, Set> s_set_ind; }; PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC integral_constant<int,Set> PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::s_set_ind; PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: synth_access_traits() { } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: synth_access_traits(const _ATraits& r_traits) : _ATraits(r_traits) { } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC inline bool PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: equal_prefixes(const_iterator b_l, const_iterator e_l, const_iterator b_r, const_iterator e_r, bool compare_after /*= false */) const { while (b_l != e_l) { if (b_r == e_r) return false; if (base_type::e_pos(*b_l) != base_type::e_pos(*b_r)) return false; ++b_l; ++b_r; } return (!compare_after || b_r == e_r); } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC bool PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: equal_keys(key_const_reference r_lhs_key, key_const_reference r_rhs_key) const { return equal_prefixes(base_type::begin(r_lhs_key), base_type::end(r_lhs_key), base_type::begin(r_rhs_key), base_type::end(r_rhs_key), true); } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC bool PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: cmp_prefixes(const_iterator b_l, const_iterator e_l, const_iterator b_r, const_iterator e_r, bool compare_after /* = false*/) const { while (b_l != e_l) { if (b_r == e_r) return false; const typename base_type::size_type l_pos = base_type::e_pos(*b_l); const typename base_type::size_type r_pos = base_type::e_pos(*b_r); if (l_pos != r_pos) return l_pos < r_pos; ++b_l; ++b_r; } if (!compare_after) return false; return b_r != e_r; } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC bool PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: cmp_keys(key_const_reference r_lhs_key, key_const_reference r_rhs_key) const { return cmp_prefixes(base_type::begin(r_lhs_key), base_type::end(r_lhs_key), base_type::begin(r_rhs_key), base_type::end(r_rhs_key), true); } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: extract_key(const_reference r_val) { return extract_key(r_val, s_set_ind); } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: extract_key(const_reference r_val, true_type) { return r_val; } PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC inline typename PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC::key_const_reference PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: extract_key(const_reference r_val, false_type) { return r_val.first; } #ifdef _GLIBCXX_DEBUG PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC bool PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC:: operator()(key_const_reference r_lhs, key_const_reference r_rhs) { return cmp_keys(r_lhs, r_rhs); } #endif #undef PB_DS_SYNTH_E_ACCESS_TRAITS_T_DEC #undef PB_DS_SYNTH_E_ACCESS_TRAITS_C_DEC } // namespace detail } // namespace __gnu_pbds #endif