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From: "eric.niebler at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/110441] New: c++17 deferred materialization of temporaries
 fails when calling class static with member syntax
Date: Tue, 27 Jun 2023 18:48:24 +0000
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X-Bugzilla-Product: gcc
X-Bugzilla-Component: c++
X-Bugzilla-Version: 14.0
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X-Bugzilla-Priority: P3
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D110441

            Bug ID: 110441
           Summary: c++17 deferred materialization of temporaries fails
                    when calling class static with member syntax
           Product: gcc
           Version: 14.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: eric.niebler at gmail dot com
  Target Milestone: ---

struct immovable {
  immovable() =3D default;
  immovable(immovable &&) =3D delete;
};

struct S {
  static immovable f() {
    return {};
  }
};

immovable g() {=20
  return S().f();
}

compile with -std=3Dc++17. Result:

<source>: In function 'immovable g()':
<source>:14:15: error: use of deleted function
'immovable::immovable(immovable&&)'
   14 |   return S().f();
      |          ~~~~~^~
<source>:4:3: note: declared here
    4 |   immovable(immovable &&) =3D delete;
      |   ^~~~~~~~~


https://godbolt.org/z/Y1h9bPrf3=