The following code provided by Jonathan compiled with gcc 4.8.0 20130113 (experimental) using the flags -Wall -std=c++11 -pedantic is rejected: //------------------------------- #include <list> struct A { A(int) { } A(const A&) = delete; A& operator=(const A&) = delete; }; int main() { int i[] = {1, 2}; std::list<A> li(i, i + 2); } //------------------------------- "[..]gcc\include\c++\4.8.0\bits\stl_list.h||In instantiation of 'std::_List_node<_Tp>::_List_node(_Args&& ...) [with _Args = {A}; _Tp = A]':| [..]\gcc\include\c++\4.8.0\ext\new_allocator.h|120|required from 'void __gnu_cxx::new_allocator<_Tp>::construct(_Up*, _Args&& ...) [with _Up = std::_List_node<A>; _Args = {A}; _Tp = std::_List_node<A>]'| [..]gcc\include\c++\4.8.0\bits\stl_list.h|506|required from 'std::list<_Tp, _Alloc>::_Node* std::list<_Tp, _Alloc>::_M_create_node(_Args&& ...) [with _Args = {A}; _Tp = A; _Alloc = std::allocator<A>; std::list<_Tp, _Alloc>::_Node = std::_List_node<A>]'| [..]gcc\include\c++\4.8.0\bits\stl_list.h|1558|required from 'void std::list<_Tp, _Alloc>::_M_insert(std::list<_Tp, _Alloc>::iterator, _Args&& ...) [with _Args = {A}; _Tp = A; _Alloc = std::allocator<A>; std::list<_Tp, _Alloc>::iterator = std::_List_iterator<A>]'| [..]gcc\include\c++\4.8.0\bits\stl_list.h|1022|required from 'void std::list<_Tp, _Alloc>::push_back(std::list<_Tp, _Alloc>::value_type&&) [with _Tp = A; _Alloc = std::allocator<A>; std::list<_Tp, _Alloc>::value_type = A]'| [..]gcc\include\c++\4.8.0\bits\stl_list.h|1491|required from 'void std::list<_Tp, _Alloc>::_M_initialize_dispatch(_InputIterator, _InputIterator, std::__false_type) [with _InputIterator = int*; _Tp = A; _Alloc = std::allocator<A>]'| [..]gcc\include\c++\4.8.0\bits\stl_list.h|628|required from 'std::list<_Tp, _Alloc>::list(_InputIterator, _InputIterator, const allocator_type&) [with _InputIterator = int*; <template-parameter-2-2> = void; _Tp = A; _Alloc = std::allocator<A>; std::list<_Tp, _Alloc>::allocator_type = std::allocator<A>]'| main.cpp|13|required from here| [..]gcc\include\c++\4.8.0\bits\stl_list.h|115|error: use of deleted function 'A::A(const A&)'| main.cpp|6|error: declared here " The error is due to a call of push_back with an previous int->A conversion. Such an conversion from the iterator's value_type to the containers value_type is not feasible. The specification of the corresponding constructor is (indirectly) ruled by Table 100, expression X(i, j): "Requires: T shall be EmplaceConstructible into X from *i." Move/CopyConstructible or Convertible to value_type are not required. Instead of invoking push_back this constructor should internally invoke the equivalent of emplace_back. This issue is similar to bug 55977 involving std::vector, but occurs even with the default allocator and for all iterator categories except input iterator, therefore this issue is reported separately.
Seems easy and fixable in 4.8.1 too.
Author: paolo Date: Sun Mar 17 18:27:52 2013 New Revision: 196755 URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=196755 Log: 2013-03-17 Paolo Carlini <paolo.carlini@oracle.com> PR libstdc++/55979 * include/bits/stl_list.h (_M_initialize_dispatch(_InputIterator, _InputIterator, __false_type)): Use emplace_back. * testsuite/23_containers/list/cons/55979.cc: New. * testsuite/23_containers/list/modifiers/1.h: Adjust. * testsuite/23_containers/list/requirements/dr438/assign_neg.cc: Adjust dg-error line number. Added: trunk/libstdc++-v3/testsuite/23_containers/list/cons/55979.cc Modified: trunk/libstdc++-v3/ChangeLog trunk/libstdc++-v3/include/bits/stl_list.h trunk/libstdc++-v3/testsuite/23_containers/list/modifiers/1.h trunk/libstdc++-v3/testsuite/23_containers/list/requirements/dr438/assign_neg.cc
Fixed 4.8.1 too.