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* [Bug c++/102898] New: declaration of 'using Foo = enum class Foo' changes meaning of 'Foo'
@ 2021-10-22 15:04 roehling at debian dot org
  2021-10-22 18:46 ` [Bug c++/102898] " pinskia at gcc dot gnu.org
  0 siblings, 1 reply; 2+ messages in thread
From: roehling at debian dot org @ 2021-10-22 15:04 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102898

            Bug ID: 102898
           Summary: declaration of 'using Foo = enum class Foo' changes
                    meaning of 'Foo'
           Product: gcc
           Version: 11.2.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: roehling at debian dot org
  Target Milestone: ---

The following C++ code fails to compile:

    enum class Foo { foo };

    class Bar
    {
        using Foo = Foo;
    };

The generated error is

    <source>:5:11: error: declaration of 'using Foo = enum class Foo' changes
meaning of 'Foo' [-fpermissive]
        5 |     using Foo = Foo;
          |           ^~~
    <source>:1:12: note: 'Foo' declared here as 'enum class Foo'
        1 | enum class Foo { foo };
          |            ^~~


The code does compile with

    using Baz = Foo;

or

    using Foo = enum Foo;

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Bug c++/102898] declaration of 'using Foo = enum class Foo' changes meaning of 'Foo'
  2021-10-22 15:04 [Bug c++/102898] New: declaration of 'using Foo = enum class Foo' changes meaning of 'Foo' roehling at debian dot org
@ 2021-10-22 18:46 ` pinskia at gcc dot gnu.org
  0 siblings, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-10-22 18:46 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102898

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |INVALID
             Status|UNCONFIRMED                 |RESOLVED

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
GCC is correct in this error message.
The (current) C++ standard requires no diagnostic on this though.

^ permalink raw reply	[flat|nested] 2+ messages in thread
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2021-10-22 15:04 [Bug c++/102898] New: declaration of 'using Foo = enum class Foo' changes meaning of 'Foo' roehling at debian dot org
2021-10-22 18:46 ` [Bug c++/102898] " pinskia at gcc dot gnu.org

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