From patchwork Mon Nov 14 04:50:46 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Patrick Palka X-Patchwork-Id: 1703424 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=gcc.gnu.org (client-ip=8.43.85.97; helo=sourceware.org; envelope-from=gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org; receiver=) Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=gcc.gnu.org header.i=@gcc.gnu.org header.a=rsa-sha256 header.s=default header.b=Zv1dhjVW; dkim-atps=neutral Received: from sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-384) server-digest SHA384) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4N9cPW3h7Fz23nQ for ; Mon, 14 Nov 2022 15:52:47 +1100 (AEDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 18EAA38357BF for ; Mon, 14 Nov 2022 04:52:44 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 18EAA38357BF DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gcc.gnu.org; s=default; t=1668401564; bh=drlh8yvJH9WnyQMIDFpSFVEc1bXUUGazvfNFD920NwU=; h=To:Cc:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From:Reply-To:From; b=Zv1dhjVWUlfWh9j4NAMMVoyWm3iYYY8j6GhZJBx2KQYAfFMiz/lnspWkESEiCWElt NsmmuVfyunFZLVTnp+VIDYJvskmoySt0+h+/RVhkHzu9IRBmNOMmTGS4yk/Zgdt+PF sWZtD3Ym695mxWitKqACCXmeIty1EiYK8uDQnjQo= X-Original-To: gcc-patches@gcc.gnu.org Delivered-To: gcc-patches@gcc.gnu.org Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by sourceware.org (Postfix) with ESMTPS id 1D29C38518BC for ; Mon, 14 Nov 2022 04:51:24 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 1D29C38518BC Received: from mail-qt1-f199.google.com (mail-qt1-f199.google.com [209.85.160.199]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_128_GCM_SHA256) id us-mta-173-jacyX9IDN-eJrIExSMqFkA-1; Sun, 13 Nov 2022 23:51:20 -0500 X-MC-Unique: jacyX9IDN-eJrIExSMqFkA-1 Received: by mail-qt1-f199.google.com with SMTP id cj6-20020a05622a258600b003a519d02f59so7371398qtb.5 for ; Sun, 13 Nov 2022 20:51:20 -0800 (PST) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=drlh8yvJH9WnyQMIDFpSFVEc1bXUUGazvfNFD920NwU=; b=kwg7eZJ+Nxz517lccmjPHd9nb7D4XWsWXmxLAr9zDlqvfyxzkzyI8gkvgr65i6dfYY nFb/5GEPKU9Ka2osdkH6oc8YRr9OVdMCJm122id2CwONBV8IWSpSng4cQhrIlW/WO/jk /GOFDpX9gxrAdrtlT1/sd27uetBBx3oOy/UkylZO5fDO0jHQrgjvUI0CVMFRzmyLT7PX 9AyXgm31jnwsoWOSPP6O7jLPqvDgNAT6Tt1SKNCLKCm7QsXh4nEiOIEIrz5yHWzJPUCL Br574GWPP/tLNuz/SyIMIPtJW9IIMQY79nSImVBVV3AmWYlGsDTQ2VA2n7f96A+vw5Pq VORQ== X-Gm-Message-State: ANoB5pmE5TDKX0nCxNl8aIvQJfxg2AvJvk1G5p2ydqnddJgphzMdL0zl 5Khf1a2iNS05v5BpcVALt1ndKOD4ymz9GyrM+dB1NmLVVsDqa951gv5bRv1YVXPku6HebWjOxeM RFzltzycfsUnzINZhna50/D8wL8Sy8i7gLrNmxWrGIWEQGGs+M/wn5h6FLXn45Q1wLyw= X-Received: by 2002:a05:622a:248c:b0:3a5:6005:7db6 with SMTP id cn12-20020a05622a248c00b003a560057db6mr10827105qtb.131.1668401479128; Sun, 13 Nov 2022 20:51:19 -0800 (PST) X-Google-Smtp-Source: AA0mqf5lvkfMS5EmBuv1eWuU+QTyANkNnLLEbqol5m88GkatISzY2LOJTIr9CpDniQassBX0jx+/Sw== X-Received: by 2002:a05:622a:248c:b0:3a5:6005:7db6 with SMTP id cn12-20020a05622a248c00b003a560057db6mr10827098qtb.131.1668401478847; Sun, 13 Nov 2022 20:51:18 -0800 (PST) Received: from localhost.localdomain (ool-457670bb.dyn.optonline.net. [69.118.112.187]) by smtp.gmail.com with ESMTPSA id x7-20020ac84a07000000b0035badb499c7sm5180567qtq.21.2022.11.13.20.51.17 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sun, 13 Nov 2022 20:51:18 -0800 (PST) To: gcc-patches@gcc.gnu.org Cc: libstdc++@gcc.gnu.org, Patrick Palka Subject: [PATCH 2/3] libstdc++: Implement ranges::iota from P2440R1 Date: Sun, 13 Nov 2022 23:50:46 -0500 Message-Id: <20221114045047.362745-2-ppalka@redhat.com> X-Mailer: git-send-email 2.38.1.420.g319605f8f0 In-Reply-To: <20221114045047.362745-1-ppalka@redhat.com> References: <20221114045047.362745-1-ppalka@redhat.com> MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-13.5 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, KAM_NUMSUBJECT, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc-patches@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-Patchwork-Original-From: Patrick Palka via Gcc-patches From: Patrick Palka Reply-To: Patrick Palka Errors-To: gcc-patches-bounces+incoming=patchwork.ozlabs.org@gcc.gnu.org Sender: "Gcc-patches" Tested on x86_64-pc-linux-gnu, does this look OK for trunk? libstdc++-v3/ChangeLog: * include/bits/ranges_algo.h (out_value_result): Define. (iota_result): Define. (__iota_fn, iota): Define. * testsuite/25_algorithms/iota/1.cc: New test. --- libstdc++-v3/include/bits/ranges_algo.h | 48 +++++++++++++++++++ .../testsuite/25_algorithms/iota/1.cc | 29 +++++++++++ 2 files changed, 77 insertions(+) create mode 100644 libstdc++-v3/testsuite/25_algorithms/iota/1.cc diff --git a/libstdc++-v3/include/bits/ranges_algo.h b/libstdc++-v3/include/bits/ranges_algo.h index da0ca981dc3..f003117c569 100644 --- a/libstdc++-v3/include/bits/ranges_algo.h +++ b/libstdc++-v3/include/bits/ranges_algo.h @@ -3517,6 +3517,54 @@ namespace ranges }; inline constexpr __contains_subrange_fn contains_subrange{}; + + template + struct out_value_result + { + [[no_unique_address]] _Out out; + [[no_unique_address]] _Tp value; + + template + requires convertible_to + && convertible_to + constexpr + operator out_value_result<_Out2, _Tp2>() const & + { return {out, value}; } + + template + requires convertible_to<_Out, _Out2> + && convertible_to<_Tp, _Tp2> + constexpr + operator out_value_result<_Out2, _Tp2>() && + { return {std::move(out), std::move(value)}; } + }; + + template + using iota_result = out_value_result<_Out, _Tp>; + + struct __iota_fn + { + template _Sent, weakly_incrementable _Tp> + requires indirectly_writable<_Out, const _Tp&> + constexpr iota_result<_Out, _Tp> + operator()(_Out __first, _Sent __last, _Tp __value) const + { + while (__first != __last) + { + *__first = static_cast&>(__value); + ++__first; + ++__value; + } + return {std::move(__first), std::move(__value)}; + } + + template _Range> + constexpr iota_result, _Tp> + operator()(_Range&& __r, _Tp __value) const + { return (*this)(ranges::begin(__r), ranges::end(__r), std::move(__value)); } + }; + + inline constexpr __iota_fn iota{}; #endif // C++23 } // namespace ranges diff --git a/libstdc++-v3/testsuite/25_algorithms/iota/1.cc b/libstdc++-v3/testsuite/25_algorithms/iota/1.cc new file mode 100644 index 00000000000..ad2bf08adf5 --- /dev/null +++ b/libstdc++-v3/testsuite/25_algorithms/iota/1.cc @@ -0,0 +1,29 @@ +// { dg-options "-std=gnu++23" } +// { dg-do run { target c++23 } } + +#include +#include +#include + +namespace ranges = std::ranges; + +void +test01() +{ + int x[3] = {}; + __gnu_test::test_output_range rx(x); + auto r0 = ranges::iota(rx, 0); + VERIFY( r0.out.ptr == x+3 ); + VERIFY( r0.value == 3 ); + VERIFY( ranges::equal(x, (int[]){0,1,2}) ); + auto r1 = ranges::iota(x, x+2, 5); + VERIFY( r1.out == x+2 ); + VERIFY( r1.value == 7 ); + VERIFY( ranges::equal(x, (int[]){5,6,2}) ); +} + +int +main() +{ + test01(); +}