[llvm-bugs] [Bug 46198] New: Spurious extra qualification warning for redeclaration of inline namespace member

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=46198

            Bug ID: 46198
           Summary: Spurious extra qualification warning for redeclaration
                    of inline namespace member
           Product: clang
           Version: trunk
          Hardware: All
                OS: All
            Status: NEW
          Severity: enhancement
          Priority: P
         Component: C++11
          Assignee: unassignedclangbugs at nondot.org
          Reporter: hstong at ca.ibm.com
                CC: blitzrakete at gmail.com, dgregor at apple.com,
                    erik.pilkington at gmail.com, llvm-bugs at lists.llvm.org,
                    richard-llvm at metafoo.co.uk

Given the source below, Clang produces a warning by default about the use of
`A::` as part of the //declarator-id// of a declaration within the namespace
`A`. The warning about "extra qualification" is unwarranted because removing
the qualification causes the redeclaration of an inline namespace member to
stop being a redeclaration of the said member.

### SOURCE (<stdin>):
namespace A {
  inline
  namespace Q {
    void f();
  }
  void A::f() { }
}


### COMPILER INVOCATION:
clang -cc1 -fsyntax-only -xc++ -


### ACTUAL OUTPUT:
<stdin>:6:11: warning: extra qualification on member 'f'
[-Wextra-qualification]
  void A::f() { }
          ^
1 warning generated.


### EXPECTED OUTPUT:
(no warning)


### COMPILER VERSION INFO (clang++ -v):
clang version 11.0.0 (https://github.com/llvm/llvm-project.git
2d2a603d663328e25774982947e3a8a65e098678)
Target: x86_64-unknown-linux-gnu
Thread model: posix
InstalledDir: /opt/wandbox/clang-head/bin
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/6.5.0
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7
Found candidate GCC installation: /usr/lib/gcc/x86_64-linux-gnu/7.5.0
Selected GCC installation: /usr/lib/gcc/x86_64-linux-gnu/5.5.0
Candidate multilib: .;@m64
Candidate multilib: 32;@m32
Candidate multilib: x32;@mx32
Selected multilib: .;@m64

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