220 33505 article Path: news.gmane.org!.POSTED!not-for-mail From: david.bolvansky@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Free function std::contains in algoritm and map Date: Tue, 1 Aug 2017 10:22:20 -0700 (PDT) Lines: 265 Approved: news@gmane.org Message-ID: Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_5247_132522116.1501608140972" X-Trace: blaine.gmane.org 1501608147 28955 195.159.176.226 (1 Aug 2017 17:22:27 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 1 Aug 2017 17:22:27 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDSMRTMFUIFRBTPRQLGAKGQETKX6PIA@isocpp.org Tue Aug 01 19:22:23 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-pf0-f199.google.com ([209.85.192.199]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dcas5-00070S-3R for gclcip-std-proposals@m.gmane.org; Tue, 01 Aug 2017 19:22:17 +0200 Original-Received: by mail-pf0-f199.google.com with SMTP id t187sf22748064pfb.0 for ; Tue, 01 Aug 2017 10:22:23 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=WDRSux9DF1pJI510WMKYQoHNGbQtDxdBB1/xo9Al5rw=; b=RCgBiQaycHZ+lGEDU8Kj17jG73virRPHPzxiF6wgxrO2q0dbyhCxz59QY7A1S4TsnM iUqqIyL88jHzr5sf9dJ983eI30grdXrMx2lXCKpB52wycfTCtEx1FZ3GcWEm7vqrwWA1 EA7GIV42wt1VBu5ud+7o/pt+DofvuJLJTjsjSBy6SmAgJP6RHAgSOztAWqiOb/Ch8m98 9SOKrxi0Bj9U36mCMqp7mTA/vIpCzwdSJjXswWm1LDja5D8P8/nkbDV+9xt5VlPa/PZm FVekIx8e4/fEbtfWwduf3ScGUdQEHOUnaXCxZ6qSVFwl5twqRfbH/7IUgXGIBw63jNWS TSrg== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe; bh=WDRSux9DF1pJI510WMKYQoHNGbQtDxdBB1/xo9Al5rw=; b=LveKXI8AxvMczXae2rcdVpgYL9KLhLqZJ51ChtmNy+tuQF/OYqNA93ERKacZVNNwGT CVxM2NNRveogW/agLLR0suX/9i8Vs84auX1w1XfDPMbNiVTp4FSM1FCjMYAcDZzvpmea pjBpZpMy/rJ8cAIdizXIRF6uYq+BPJV19zDAiJXeY6w1s9wEDTbjva3qFu/UQtZJDXYz ss9bXz6XESa+5Ac8kEsWWPddnwauiZgN6yuydbPG6w2LLfFFmIMBQ7tqVOCty5cRYk4P y8OozNUVCzGN8Jxao/T94VK+KDAP1f8G0xUEOQm/NXPXxJyQdKzzEP7j1pCFopEFPEfG bzpA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:message-id:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=WDRSux9DF1pJI510WMKYQoHNGbQtDxdBB1/xo9Al5rw=; b=dIH3nzIWqBq3x4nm7UWoqGgq6GSkYaSFY4gFDpreF6AguvzTEInEzPSBVxQxEQkbjr Ehsat7MNqrASqU8x0YwAD22bkrZ0PQQGMyeObzuLyqCW8h/G7aro3nbuK0s4k+v/oiOK usd8ZquN6UEmUiCu2vHuOOVHhGk/giRjbGNxNfyZy2j+7UtZ9rdEbvAtuaLatcMZgToB HP84IL1eX0n8tqeCPpwtG1pTED+wlD8BIeeKMtrwiHn1v5FDIowMRZGrMLb37JhDacA8 UiQOcogma62LLiK3/6wuY5hxMeETWhAP4vMOukB7MRWNa+12Pk6Ddgnwav9mFJUpwRyo dgYQ== X-Gm-Message-State: AIVw113G+7wKovPlwuLGvkPhww++IuCzU5FjxNR34IGUeCNll7rfm3n6 5otNAv5PnTuBTY+4 X-Received: by 10.99.123.4 with SMTP id w4mr15471129pgc.124.1501608142870; Tue, 01 Aug 2017 10:22:22 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.107.57.195 with SMTP id g186ls1565445ioa.25.gmail; Tue, 01 Aug 2017 10:22:21 -0700 (PDT) X-Received: by 10.31.179.145 with SMTP id c139mr101321vkf.24.1501608141420; Tue, 01 Aug 2017 10:22:21 -0700 (PDT) X-Original-Sender: david.bolvansky@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:33505 Archived-At: ------=_Part_5247_132522116.1501608140972 Content-Type: multipart/alternative; boundary="----=_Part_5248_693864134.1501608140973" ------=_Part_5248_693864134.1501608140973 Content-Type: text/plain; charset="UTF-8" Instead of comparing with end(), there could be a new function - *contains.* Now if(std::find(vector.begin(), vector.end(), item) != vector.end()){ // found } else { // not found } // maps if(map.find("key") != map.end()){ // found } else { // not found } I propose "contains" function: if(std::contains(vector.begin(), vector.end(), item)){ // found } else { // not found } // maps if(map.contains("key")){ // found } else { // not found } -- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/b7cc5b96-2165-4b4d-a9d3-7ddec49ca626%40isocpp.org. ------=_Part_5248_693864134.1501608140973 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Instead of comparing with end(), there could be a new func= tion -=C2=A0contains.

Now

if(std::find(vector.begin(), vect=
or.=
end(), item) !=3D vector.end()){=

=C2=A0=
 =C2=A0 //=
 found
=
} else {
=C2=A0 =C2=A0 // not found
}

=C2=A0// maps
if(map.find("key") !=3D=
 map.end()){
=C2=A0 =C2=A0 // found
} else {=

=C2=A0 =C2=A0 // not found
}


I propose "contains" function:

if(std::contains(<=
/span>vec=
tor.begin(), vector.end(), item)){
=C2=A0 =C2=A0 // found
<=
span style=3D"color: rgb(102, 102, 0);" class=3D"styled-by-prettify">} else {=
=C2=A0 =C2=A0 // not found
}

=C2=A0// maps
if(map.contains("key")=
)<=
/span>{=

=C2=A0 =C2=A0 // found
} else {
=C2=A0 =C2=A0 // not found
=
}

=

--
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To unsubscribe from this group and stop receiving emails from it, send an e= mail to std-proposa= ls+unsubscribe@isocpp.org.
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To view this discussion on the web visit https://groups.google.= com/a/isocpp.org/d/msgid/std-proposals/b7cc5b96-2165-4b4d-a9d3-7ddec49ca626= %40isocpp.org.
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