我有一個用戶定義的類,它應該是unsorted_map的值類型。我的問題是,插入不工作(用gcc 4.7編譯時已經是一個靜態錯誤)。無序圖:自有值類型問題
我的類:以創建地圖並插入
class bk_tree {
public:
bk_point *root;
DISTANCE_FUN metric;
int max_depth;
//assume words not empty
bk_tree() {metric=NULL; root=NULL; max_depth = 0;}
//rule of three
bk_tree(const bk_tree& copy_this) {metric=copy_this.metric; root=copy_this.root; max_depth = copy_this.max_depth;}
bk_tree& operator=(const bk_tree& copy_this) { metric=copy_this.metric; root=copy_this.root; max_depth = copy_this.max_depth; return *this; }
~bk_tree() { delete root; }
bk_tree(unordered_set<string> *words, DISTANCE_FUN _metric);
bk_tree(DISTANCE_FUN _metric) { metric = _metric; root = NULL; max_depth = 0;
};
代碼:
#include<tr/unordered_map>
using namespace std;
using namespace std::tr1;
unordered_map<DocID, sigmod::bk_tree> *my_map = new unordered_map<DocID, sigmod::bk_tree>;
sigmod::bk_tree my_value = sigmod::bk_tree(&words, sigmod::hamming_distance_metric);
doc_bk_hamming->insert(make_pair(my_key, my_value));
彙編(克++ -O3 -std = C++ 11 -fopenmp -fPIC -Wall - 克-I -I./include -c -o ref_impl/core.o)錯誤:
ref_impl/core.cpp
In file included from /usr/include/c++/4.7/bits/move.h:57:0,
from /usr/include/c++/4.7/bits/stl_pair.h:61,
from /usr/include/c++/4.7/bits/stl_algobase.h:65,
from /usr/include/c++/4.7/bits/char_traits.h:41,
from /usr/include/c++/4.7/string:42,
from ref_impl/../include/metric.h:5,
from ref_impl/core.cpp:29:
/usr/include/c++/4.7/type_traits: In instantiation of ‘struct std::is_convertible<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false> >’:
/usr/include/c++/4.7/type_traits:116:12: required from ‘struct std::__and_<std::is_convertible<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false> >, std::is_convertible<const bool&, bool> >’
/usr/include/c++/4.7/bits/stl_pair.h:113:38: required from here
/usr/include/c++/4.7/type_traits:1263:12: error: the value of ‘std::__is_convertible_helper<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>, false>::value’ is not usable in a constant expression
/usr/include/c++/4.7/type_traits:1258:70: note: ‘std::__is_convertible_helper<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>, false>::value’ used in its own initializer
/usr/include/c++/4.7/type_traits:1263:12: note: in template argument for type ‘bool’
/usr/include/c++/4.7/type_traits: In instantiation of ‘struct std::__and_<std::is_convertible<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false> >, std::is_convertible<const bool&, bool> >’:
/usr/include/c++/4.7/bits/stl_pair.h:113:38: required from here
/usr/include/c++/4.7/type_traits:116:12: error: ‘value’ is not a member of ‘std::is_convertible<const std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false>&, std::tr1::__detail::_Hashtable_iterator<std::pair<const unsigned int, sigmod::bk_tree>, false, false> >’
'root = copy_this.root;'您正在複製指針的值。你知道嗎? – 2013-04-04 09:02:11
您的副本構造函數和複製指派操作符已損壞。操作之後,兩個對象將具有相同的指針,並且兩個析構函數都會嘗試刪除它。 – 2013-04-04 09:03:28
什麼是DocID? – ForEveR 2013-04-04 09:05:09