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From: "stinkingmadgod at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug libstdc++/97930] New: pair is not a structural type
Date: Fri, 20 Nov 2020 18:03:53 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D97930

            Bug ID: 97930
           Summary: pair is not a structural type
           Product: gcc
           Version: 11.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: libstdc++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: stinkingmadgod at gmail dot com
  Target Milestone: ---

template<std::pair<int, int>>
struct S;

This is valid in C++20, but fails due to libstdc++ using a private base
__pair_base, rendering pair non-structural.

[pairs.pairs]
pair<T, U> is a structural type if T and U are both structural types.=