1 ///////////////////////////////////////////////////////////////////////////// 2 // 3 // (C) Copyright Ion Gaztanaga 2006-2014 4 // 5 // Distributed under the Boost Software License, Version 1.0. 6 // (See accompanying file LICENSE_1_0.txt or copy at 7 // http://www.boost.org/LICENSE_1_0.txt) 8 // 9 // See http://www.boost.org/libs/intrusive for documentation. 10 // 11 ///////////////////////////////////////////////////////////////////////////// 12 #include <boost/core/no_exceptions_support.hpp> 13 //[doc_erasing_and_disposing 14 #include <boost/intrusive/list.hpp> 15 16 using namespace boost::intrusive; 17 18 //A class that can be inserted in an intrusive list 19 class my_class : public list_base_hook<> 20 { 21 public: my_class(int i)22 my_class(int i) 23 : int_(i) 24 {} 25 26 int int_; 27 //... 28 }; 29 30 //Definition of the intrusive list 31 typedef list<my_class> my_class_list; 32 33 //The predicate function 34 struct is_even 35 { operator ()is_even36 bool operator()(const my_class &c) const 37 { return 0 == (c.int_ % 2); } 38 }; 39 40 //The disposer object function 41 struct delete_disposer 42 { operator ()delete_disposer43 void operator()(my_class *delete_this) 44 { delete delete_this; } 45 }; 46 main()47 int main() 48 { 49 const int MaxElem = 100; 50 51 //Fill all the nodes and insert them in the list 52 my_class_list list; 53 54 //<- 55 #if 1 56 BOOST_TRY{ 57 #else 58 //-> 59 try{ 60 //<- 61 #endif 62 //-> 63 //Insert new objects in the container 64 for(int i = 0; i < MaxElem; ++i) list.push_back(*new my_class(i)); 65 66 //Now use remove_and_dispose_if to erase and delete the objects 67 list.remove_and_dispose_if(is_even(), delete_disposer()); 68 } 69 //<- 70 #if 1 71 BOOST_CATCH(...){ 72 #else 73 //-> 74 catch(...){ 75 //<- 76 #endif 77 //-> 78 //If something throws, make sure that all the memory is freed 79 list.clear_and_dispose(delete_disposer()); 80 //<- 81 #if 1 82 BOOST_RETHROW 83 #else 84 //-> 85 throw; 86 //<- 87 #endif 88 //-> 89 } 90 //<- 91 BOOST_CATCH_END 92 //-> 93 94 //Dispose remaining elements 95 list.erase_and_dispose(list.begin(), list.end(), delete_disposer()); 96 return 0; 97 } 98 //] 99