c++/6340: copy constructor vs non-default constructor

[nathan@gcc.gnu.org]

Synopsis: copy constructor vs non-default constructor

State-Changed-From-To: open->closed
State-Changed-By: nathan
State-Changed-When: Thu Apr 18 00:58:37 2002
State-Changed-Why:
    not a bug.
    	Thing2 b = a;
    is formally
    	Thing2 b(Thing2 (a));
    i.e. convert a to Thing2 then copy construct b with
    that. [8.5]/14 class copy initialization case.
    But we are allowed to elide that temporary Thing2.
    See [12.8]/15 of the std. The copy ctor must
    exist and be accessible though.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6340