http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55335
Bug #: 55335
Summary: [DR 5] cv-qualifiers of destination type in
copy-initialization
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: ai.az...@gmail.com
Created attachment 28694
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28694
Output of -v option and preprocessed file with GCC 4.8.0 20121111
The following valid code is rejected by GCC 4.6.4 20121109, 4.7.3 20121110 and
4.8.0 20121111.
/////////////////////////
struct C{};
struct A {
A(const A&){};
A(const C&){};
};
int main()
{
C c;
const volatile A a = c;
}
/////////////////////////
For the above code, GCC 4.8.0 20121111 complains as follows;
main.cpp: In function 'int main()':
main.cpp:11:24: error: no matching function for call to 'A::A(const volatile
A)'
const volatile A a = c;
^
main.cpp:11:24: note: candidates are:
main.cpp:5:3: note: A::A(const C&)
A(const C&){};
^
main.cpp:5:3: note: no known conversion for argument 1 from 'const volatile
A' to 'const C&'
main.cpp:4:3: note: A::A(const A&)
A(const A&){};
^
main.cpp:4:3: note: no known conversion for argument 1 from 'const volatile
A' to 'const A&'
As far as I can guess from the error message, GCC does not seem to implement
the proposed resolution of DR 5.
http://www.open-std.org/jtc1/sc22/wg21/docs/cwg_defects.html#5
