[llvm-bugs] [Bug 37833] New: Abstract class in function return type

via llvm-bugs llvm-bugs at lists.llvm.org
Mon Jun 18 04:18:12 PDT 2018


            Bug ID: 37833
           Summary: Abstract class in function return type
           Product: clang
           Version: unspecified
          Hardware: PC
                OS: Linux
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++
          Assignee: unassignedclangbugs at nondot.org
          Reporter: zhonghao at pku.org.cn
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

The code is as follow:

template<typename T>
struct S{};

struct A
 virtual void f() = 0;

int main()
 S<A(int)> s;

An abstract class shall not be used as a function return type, but clang++
accepts the code. 

The code comes from a gcc bug report

A previous version of gcc also accepts the code, but it is fixed already.

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