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From: "mpolacek at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/106882] New: passing X as 'this' argument discards
 qualifiers
Date: Wed, 07 Sep 2022 19:58:57 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D106882

            Bug ID: 106882
           Summary: passing X as 'this' argument discards qualifiers
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: mpolacek at gcc dot gnu.org
  Target Milestone: ---

This should be accepted:

struct Mutt {
    operator int*() &&;
};

int* five(Mutt x) {
  return x;  // OK since C++20 because P1155
}

but is currently rejected with error: passing =E2=80=98Mutt=E2=80=99 as =E2=
=80=98this=E2=80=99 argument
discards qualifiers [-fpermissive]

Maybe we're not checking IMPLICIT_RVALUE_P where needed.

This blocks P2266.=