Re: c++/9032: Can't find template match

Re: c++/9032: Can't find template match

[bangerth]

Synopsis: Can't find template match

State-Changed-From-To: open->analyzed
State-Changed-By: bangerth
State-Changed-When: Fri Dec 20 14:24:08 2002
State-Changed-Why:
    It should compile. Here's a slightly smaller testcase:
    -------------------
    struct A {
        void g();
    };
    
    struct B : A {};
    
    template<class T>
    void  f(T, void (T::*m)());
    
    int main() {
      f(B(), &B::g);
    }
    ------------------------
    
    tmp/g> /home/bangerth/bin/gcc-3.4-CVS/bin/c++ -c troep.cc
    troep.cc: In function `int main()':
    troep.cc:11: error: no matching function for call to `f(B, void (A::*)())'
    
    The problem is that &B::g decays too quickly to &A::g.
    
    I'm pretty sure this is a duplicate of some other report
    which I've seen lately (I though I had even filed it myself,
    but couldn't find it among mine...).
    
    W.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=9032

c++/9032: Can't find template match

[carlo]

>Number:         9032
>Category:       c++
>Synopsis:       Can't find template match
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    unassigned
>State:          open
>Class:          rejects-legal
>Submitter-Id:   net
>Arrival-Date:   Fri Dec 20 14:06:00 PST 2002
>Closed-Date:
>Last-Modified:
>Originator:     Carlo Wood
>Release:        g++ 3.x
>Organization:
>Environment:

>Description:
Shouldn't the attached file compile?
Maybe not, but I am not sure :(.

~>g++ -c troep.cc
troep.cc: In function `int main()':
troep.cc:19: no matching function for call to `f(B&, void (A::*)(int) const)'

>How-To-Repeat:

>Fix:

>Release-Note:
>Audit-Trail:
>Unformatted:
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Content-Transfer-Encoding: base64
Content-Disposition: attachment; filename="troep.cc"

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