[Bug c++/65291] mention that default arguments of constructors are not inherited

["redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65291

--- Comment #4 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #3)
> BTW, clang rejects the 'using':
> 
> 10 : error: using declaration cannot refer to a constructor

You need to compile as C++11.
>From gcc-bugs-return-479164-listarch-gcc-bugs=gcc.gnu.org@gcc.gnu.org Tue Mar 03 14:32:12 2015
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From: "redi at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/65291] mention that default arguments of constructors are not inherited
Date: Tue, 03 Mar 2015 14:32:00 -0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?ide291

Jonathan Wakely <redi at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |diagnostic

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Reduced:

struct A {
  A(int a = 0) { }
};

struct B : A {
  using A::A;
  B(int, int);
};

B b;


FWIW the relevant output from Clang trunk is:

c.cc:10:3: error: no matching constructor for initialization of 'B'
B b;
  ^
c.cc:6:12: note: candidate constructor (inherited) not viable: requires 1
argument, but 0 were provided
  using A::A;
           ^
c.cc:2:3: note: inherited from here
  A(int a = 0) { }
  ^


EDG says simply:

"c.cc", line 10: error: no default constructor exists for class "B"
  B b;
    ^