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From: "fw at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/96500] New: enum of underlying type bool do not
Date: Thu, 06 Aug 2020 14:00:46 +0000	[thread overview]
Message-ID: <bug-96500-4@http.gcc.gnu.org/bugzilla/> (raw)

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96500

            Bug ID: 96500
           Summary: enum of underlying type bool do not
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Keywords: rejects-valid
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: fw at gcc dot gnu.org
  Target Milestone: ---

I believe this needs to be accepted:

enum E : bool { One, Two, Three };

See <http://eel.is/c++draft/dcl.enum#5>, “If the underlying type is fixed, the
type of each enumerator prior to the closing brace is the underlying type and
the constant-expression in the enumerator-definition shall be a converted
constant expression of the underlying type.”.

Converted constant expressions include integral conversions. Conversion from
int to bool is not a narrowing conversion.  So Three should have the value
true, just like Two.

             reply	other threads:[~2020-08-06 14:00 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-06 14:00 fw at gcc dot gnu.org [this message]
2020-08-06 14:53 ` [Bug c++/96500] " mpolacek at gcc dot gnu.org
2020-08-06 15:33 ` [Bug c++/96500] enum of underlying type bool does not accept enumerators with integer constant values other than 0 and 1 fw at gcc dot gnu.org

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