http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58594
Bug ID: 58594
Summary: std::make_shared does not accept const types as
parameters
Product: gcc
Version: 4.9.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: akim.demaille at gmail dot com
The following piece of code works with 4.8, clang 3.3 and 3.4, but not 4.9. I
expect the code to be right, and 4.9 to be wrong, but even if it were the
converse, the location is useless: it's the end of the translation unit, not
the location of the error. It works if I remove the const.
Cheers!
$ cat foo.cc
#include <memory>
int
main()
{
const int f = 42;
auto fp = std::make_shared<const int>(f);
return 51;
}
$ g++-mp-4.8 --version
g++-mp-4.8 (MacPorts gcc48 4.8.1_3) 4.8.1
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++-mp-4.8 -Wall -std=c++11 foo.cc
$ g++-mp-4.9 --version
g++-mp-4.9 (MacPorts gcc49 4.9-20130915_0) 4.9.0 20130915 (experimental)
Copyright (C) 2013 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
$ g++-mp-4.9 -Wall -std=c++11 foo.cc
In file included from /opt/local/include/gcc49/c++/bits/shared_ptr.h:52:0,
from /opt/local/include/gcc49/c++/memory:82,
from foo.cc:1:
/opt/local/include/gcc49/c++/bits/shared_ptr_base.h: In instantiation of 'void*
std::_Sp_counted_ptr_inplace<_Tp, _Alloc, _Lp>::_M_get_deleter(const
std::type_info&) [with _Tp = const int; _Alloc = std::allocator<int>;
__gnu_cxx::_Lock_policy _Lp = (__gnu_cxx::_Lock_policy)2u]':
foo.cc:9:1: required from here
/opt/local/include/gcc49/c++/bits/shared_ptr_base.h:462:58: error: invalid
conversion from 'const void*' to 'void*' [-fpermissive]
return __ti == typeid(_Sp_make_shared_tag) ? _M_ptr() : nullptr;
^
Cheers!
