220 32658 <82be917c-b3c8-4cb4-bbbc-0f62ec78ce84@isocpp.org> article Path: news.gmane.org!.POSTED!not-for-mail From: tecoberg@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: std::string::find implementation Date: Tue, 30 May 2017 06:25:55 -0700 (PDT) Lines: 89 Approved: news@gmane.org Message-ID: <82be917c-b3c8-4cb4-bbbc-0f62ec78ce84@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="----=_Part_3562_1611131057.1496150755682" X-Trace: blaine.gmane.org 1496150757 18456 195.159.176.226 (30 May 2017 13:25:57 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Tue, 30 May 2017 13:25:57 +0000 (UTC) To: ISO C++ Standard - Future Proposals Original-X-From: std-proposals+bncBDYIPUG7Z4MBBZHFWXEQKGQEW3BYIPI@isocpp.org Tue May 30 15:25:52 2017 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-oi0-f71.google.com ([209.85.218.71]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1dFh9k-0004cX-DG for gclcip-std-proposals@m.gmane.org; Tue, 30 May 2017 15:25:52 +0200 Original-Received: by mail-oi0-f71.google.com with SMTP id a99sf68316873oic.8 for ; Tue, 30 May 2017 06:25:57 -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:x-spam-checked-in-group :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=92hYS/JrcfXEfz1BvkjVJgKQvXz/+4uKmWavoC2CxDg=; b=qlvvv9zBqN3EIGFmNp7l1+bxzSnzqpuSvm8BX8AlOtQQ4eLB51LQQe3d/gSCRcHqeR cX8GviW5v02+gOkAPJrOkpAdG9YoU3TnX07VAhDxa6gZJJiafnCw5nv2VnylDw/C40DU Dcm7jBehTsE8OpEJVYjQWIZHp8ZdYaqcpR/SEZjVtArDixbzgnK32i4FSwnA/EGcy9qk Kcpyyj1X8wyeVwKCSs87oyfBC2WRH7V8afnF5xZOvVVposjT2Q/Kn1WBACs6sFIzv6B3 iZWc7+PvNc7RjpiSm5wrDSLHnj9PtRMgj7NOE+P/pA5frx9N3T9/IDK7vMhkffW5nZAb MqUw== 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:x-spam-checked-in-group :list-post:list-help:list-archive:list-subscribe:list-unsubscribe; bh=92hYS/JrcfXEfz1BvkjVJgKQvXz/+4uKmWavoC2CxDg=; b=PY31kczjgV9P6zLh+iPhkQCgmtGLbCqEU47nPTPsV4kyoTbxD57q81MAVmofepo/6W pIXJSKjEuNnRjS0RFDvTKX/c3ghCIxaklTgzMFQRB18KvqChaE+mFjRTl70coaAJkTce 8X02mzus5hNaoMy+cIQVTciGErKCbAFX1e5rFxO+Ou82Nir56u4e2tw/62CCoWvxye+D RkAaFZRWIqtdCV7Lx71sLp0PfEcHqiIycRraJx38O2f4F84rOc1SyumLFFOM/Ypj2+Ld W7C0IcHL0NdapQck7DIKl7MX6SEeXeaGeexlDr5tToEl59aly5H+mKN2UGVrD1fwEKCF NxiQ== 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=92hYS/JrcfXEfz1BvkjVJgKQvXz/+4uKmWavoC2CxDg=; b=Yb0xRkX8DI3+UHT1vLibsSDr+ve3sncJPmiiBKGKfPGRuSIpzIiAEK3Z9GYpkrXjQI S/HeuR48u9eM4LNePZcFh6x9L+/vbHrrgeaYmFsj9P+Da0A3mFOTYNZlejkxcziktjle +n7V7/dT2MoGXEdB+4vLnEV8FSeXoXEtmYcSKs+C3RnYdr32/eq1fG4Gq3IiHi92ViqN xWSGIhsA9HgQL34mHI1oKlUuwprESgXuABQHuZlNh00gtYrry5BZBpjdT45X4yqrsjee y/Wg3FqLvtly45UV5SjRVs2HW/IMcAyKnv6H8DiIswIxSBcCZlsiHGbMDUrWwE03BCke p3eQ== X-Gm-Message-State: AODbwcCLi+cLbdjbO8pNC7rx3Ebip2JYoZ181CaUxCQS//dsqibtf8Ac pNmCnyD+6h3XNiz5 X-Received: by 10.157.40.33 with SMTP id m30mr3218439otb.102.1496150757005; Tue, 30 May 2017 06:25:57 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.157.35.25 with SMTP id j25ls727642otb.33.gmail; Tue, 30 May 2017 06:25:56 -0700 (PDT) X-Received: by 10.157.28.130 with SMTP id l2mr437361ota.17.1496150756133; Tue, 30 May 2017 06:25:56 -0700 (PDT) X-Original-Sender: tecoberg@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:32658 Archived-At: ------=_Part_3562_1611131057.1496150755682 Content-Type: multipart/alternative; boundary="----=_Part_3563_958530312.1496150755682" ------=_Part_3563_958530312.1496150755682 Content-Type: text/plain; charset="UTF-8" I figure out we can set the start point of search on string but we cannot set the end. For example: mystring.find('A', 10, 15); //Search for 'A' into mystring starting on position 10 and ends on position 15 (into mystring) The problem is the actual implementation allow to set the quantity of characters to be searched from char*: size_t find (const char* s, size_t pos, size_type n) const; It is a little confusing and it should be deprecated. The best solution is make another function member like std::string::search to replace std::string::find. It could be like this: size_t search (const string& str, size_t pos = 0, size_t end = string::npos ) const noexcept; size_t search (const char* s, size_t pos = 0, size_t end = string::npos) const; size_t search (char c, size_t pos = 0, size_t end = string::npos) const noexcept; where the size_t end is the end position in string where the search will be made. -- 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/82be917c-b3c8-4cb4-bbbc-0f62ec78ce84%40isocpp.org. ------=_Part_3563_958530312.1496150755682 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I figure out we can set the start point o= f search on string but we cannot set the end. For example:

mystring.find('A', 10, 15);=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2= =A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0= =C2=A0=C2=A0=C2=A0=C2=A0 //Search for 'A' into mystring starting on= position 10 and ends on position 15 (into mystring)

The problem is the actual implementation allow to set= the quantity of characters to be searched from char*:

size_t find (const char* s, size_t pos, size_type n= ) const;

It is a little confusi= ng and it should be deprecated.

The best solution is make another fu= nction member like std:= :string::search to replace std::string::find. It could be like this:

=C2=A0=C2=A0=C2=A0 size_t searc= h (const string& str, size_t pos =3D 0, size_t end =3D string::npos ) c= onst noexcept;
=C2=A0=C2=A0=C2=A0 size_t search (const char* s, size_t p= os =3D 0, size_t end =3D string::npos) const;
=C2=A0=C2=A0=C2=A0 size_t = search (char c, size_t pos =3D 0, size_t end =3D string::npos) const noexce= pt;

where the size_t end is the end position in string where = the search will be made.

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