[Bug c++/51184] New: Abstract class in function return type

[ai.azuma at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51184

             Bug #: 51184
           Summary: Abstract class in function return type
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: minor
          Priority: P3
         Component: c++
        AssignedTo: unassig...@gcc.gnu.org
        ReportedBy: ai.az...@gmail.com


Created attachment 25842
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25842
Outputs by -v option and preprocessed source.

An abstract class shall not be used as a function return type. However, GCC
4.7-20111112 accepts the following code.


///////////////////////
template<typename T>
struct S{};

struct A
{
  virtual void f() = 0;
};

int main()
{
  S<A(int)> s;
}
///////////////////////