[llvm-bugs] [Bug 37600] New: error: cannot inherit constructors from const T

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=37600

            Bug ID: 37600
           Summary: error: cannot inherit constructors from const T
           Product: clang
           Version: trunk
          Hardware: PC
                OS: All
            Status: NEW
          Severity: normal
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: rustamabd at gmail.com
                CC: dgregor at apple.com, llvm-bugs at lists.llvm.org

Consider the following example:

struct A {};
using T = const A;
struct B : T {
    using T::T; // error: 'const A' is not a direct base of 'B'
};
int main() {
    B b;
}

The code compiles in GCC and VC14.1 but not in Clang (any version).

Obviously T must name a class for 'using T::T' to work ([class.qual]/2.2), so
according to [class.name]/5 'const' should be ignored.

In addition, the error makes no sense - how can 'const A' be a class at all?

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