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    "msgid": "<bmm.hhubic1gpg.gcc.gcc-TEST.redi.24.1.0@forge-stage.sourceware.org>",
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    "date": "2026-04-22T10:35:07",
    "name": "[v1,0/1] libstdc++: Make equal and is_permutation short-circuit (LWG 3560)",
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        "name": "Jonathan Wakely via Sourceware Forge",
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            "date": "2026-04-22T10:35:07",
            "name": "libstdc++: Make equal and is_permutation short-circuit (LWG 3560)",
            "version": 1,
            "mbox": "http://patchwork.ozlabs.org/series/500978/mbox/"
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        "From": "Jonathan Wakely via Sourceware Forge\n <forge-bot+redi@forge-stage.sourceware.org>",
        "Date": "Wed, 22 Apr 2026 10:35:07 +0000",
        "Subject": "[PATCH v1 0/1] libstdc++: Make equal and is_permutation short-circuit\n (LWG 3560)",
        "To": "gcc-patches mailing list <gcc-patches@gcc.gnu.org>",
        "Message-ID": "\n <bmm.hhubic1gpg.gcc.gcc-TEST.redi.24.1.0@forge-stage.sourceware.org>",
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        "X-Requested-Reviewer": "ppalka",
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        "X-Pull-Request": "https://forge.sourceware.org/gcc/gcc-TEST/pulls/24",
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    },
    "content": "Hi gcc-patches mailing list,\nJonathan Wakely via Sourceware Forge <forge-bot+redi@forge-stage.sourceware.org> has requested that the following forgejo pull request\nbe published on the mailing list.\n\nCreated on: 2024-11-14 17:12:00+00:00\nLatest update: 2025-08-13 03:25:18+00:00\nChanges: 0 changed files, 0 additions, 0 deletions\nHead revision: redi/gcc ref refs/pull/24/head commit 4116ef62cffdfd7b2e7b5868c2a5bd52addc8b92\nBase revision: gcc/gcc-TEST ref trunk commit 4a3a0be34f723df192361e43bb48b9292dfe3a54 r15-5289-g4a3a0be34f723d\nMerge base: 4a3a0be34f723df192361e43bb48b9292dfe3a54\nFull diff url: https://forge.sourceware.org/gcc/gcc-TEST/pulls/24.diff\nDiscussion:  https://forge.sourceware.org/gcc/gcc-TEST/pulls/24\nRequested Reviewers: ppalka\n\nWe already implement short-circuiting for random access iterators, but\nwe also need to do so for `ranges::equal` and `ranges::is_permutation` when\ngiven sized ranges that are not random access ranges (e.g. `std::list`).\n\n```\nlibstdc++-v3/ChangeLog:\n\n\t* include/bits/ranges_algo.h (__is_permutation_fn::operator()):\n\tShort-circuit for sized ranges with different sizes, as per LWG\n\t3560.\n\t* include/bits/ranges_algobase.h (__equal_fn::operator()):\n\tLikewise.\n\t* include/bits/stl_algo.h (__is_permutation): Use if-constexpr\n\tfor random access iterator branches.\n\t* include/bits/stl_algobase.h (__equal4): Likewise.\n\t* testsuite/25_algorithms/equal/lwg3560.cc: New test.\n\t* testsuite/25_algorithms/is_permutation/lwg3560.cc: New test.\n```\n\n\nChanged files:\n- A: libstdc++-v3/testsuite/25_algorithms/equal/lwg3560.cc\n- A: libstdc++-v3/testsuite/25_algorithms/is_permutation/lwg3560.cc\n- M: libstdc++-v3/include/bits/ranges_algo.h\n- M: libstdc++-v3/include/bits/ranges_algobase.h\n- M: libstdc++-v3/include/bits/stl_algo.h\n- M: libstdc++-v3/include/bits/stl_algobase.h\n\n\nJonathan Wakely (1):\n  libstdc++: Make equal and is_permutation short-circuit (LWG 3560)\n\n libstdc++-v3/include/bits/ranges_algo.h       |  7 +++\n libstdc++-v3/include/bits/ranges_algobase.h   |  7 +++\n libstdc++-v3/include/bits/stl_algo.h          | 13 ++---\n libstdc++-v3/include/bits/stl_algobase.h      | 44 ++++++++--------\n .../testsuite/25_algorithms/equal/lwg3560.cc  | 49 ++++++++++++++++++\n .../25_algorithms/is_permutation/lwg3560.cc   | 51 +++++++++++++++++++\n 6 files changed, 145 insertions(+), 26 deletions(-)\n create mode 100644 libstdc++-v3/testsuite/25_algorithms/equal/lwg3560.cc\n create mode 100644 libstdc++-v3/testsuite/25_algorithms/is_permutation/lwg3560.cc"
}