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From: "vincent.hamp at higaski dot at" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/99059] New: Static inline variable can't refer to itself
Date: Wed, 10 Feb 2021 14:17:41 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D99059

            Bug ID: 99059
           Summary: Static inline variable can't refer to itself
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: vincent.hamp at higaski dot at
  Target Milestone: ---

Declaring a static inline member variable and initializing it with a pointe=
r to
itself is currently impossible. The textbook example for such code would
probably be a linked list of some sort:

struct link {
  link* next{nullptr};
  link* prev{nullptr};
};

struct list {
  static inline link tail{&tail, &tail};
};

list l;


Making the member just static and initializing it outside of the class work=
s,
but this kinda breaks my mental model of "static inline" as just being
syntactic sugar. Is this an actual bug or just some overlooked thing in the
standard?=