220 40237 article Path: news.gmane.org!.POSTED!not-for-mail From: Daniel Gutson Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: std::between ? 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[209.85.220.41]) by mx.google.com with SMTPS id e6-v6sor2926860ljg.40.2018.09.28.04.03.17 for (Google Transport Security); Fri, 28 Sep 2018 04:03:17 -0700 (PDT) Received-SPF: pass (google.com: domain of danielgutson@gmail.com designates 209.85.220.41 as permitted sender) client-ip=209.85.220.41; X-Received: by 2002:a2e:4584:: with SMTP id s126-v6mr10917359lja.60.1538132596589; Fri, 28 Sep 2018 04:03:16 -0700 (PDT) In-Reply-To: <7b85d688-9013-407d-b7d3-10d28494e960@isocpp.org> X-Original-Sender: danielgutson@gmail.com X-Original-Authentication-Results: mx.google.com; dkim=pass header.i=@gmail.com header.s=20161025 header.b=ev7gzJPX; spf=pass (google.com: domain of danielgutson@gmail.com designates 209.85.220.41 as permitted sender) smtp.mailfrom=danielgutson@gmail.com; dmarc=pass (p=NONE sp=QUARANTINE dis=NONE) header.from=gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Spam-Checked-In-Group: std-proposals@isocpp.org 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:40237 Archived-At: --000000000000098e670576ec67a0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable I stepped into this too many times. One of the issues are the four < vs <=3D combinations. The way I solved is by creating a temporal object that allows chain comparison, and a cast-to-bool operator. if (chain(3) < x < 4) El jue., 27 de sep. de 2018 a la(s) 12:53, Addy (aclaure@gmail.com) escribi=C3=B3: > I do this pattern often: > > if (0 < x && x < 100) > > And would love a simple `std::between()` that would take two arguments an= d > an optional third (compare function) argument. > > Similar to this: https://gist.github.com/martinmoene/9410391 > > templated > bool std::between(T lower, T upper, Compare comp) > { > return comp(lower) && comp(upper); > } > > Does anything like this exist? Should I propose it!? > > -- > 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/7b85d688-901= 3-407d-b7d3-10d28494e960%40isocpp.org > > . > --=20 Who=E2=80=99s got the sweetest disposition? One guess, that=E2=80=99s who? Who=E2=80=99d never, ever start an argument? Who never shows a bit of temperament? Who's never wrong but always right? Who'd never dream of starting a fight? Who get stuck with all the bad luck? --=20 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 e= mail 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/CAFdMc-36tAQ1JJxYOz3PEKv1qnGs%3DWPGN3NWWKCEwY%2B= SgNdDXA%40mail.gmail.com. --000000000000098e670576ec67a0 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
I stepped into this too many times.
One of the issues = are the four < vs <=3D combinations.

The way= I solved is by creating a temporal object that allows chain comparison, an= d a cast-to-bool operator.

if (chain(3) < x <= ; 4)=C2=A0



El jue., 27 de sep. de 2018 a la(s) 12:53, Add= y (aclaure@gmail.com) escribi=C3= =B3:
I do this pat= tern often:

if (0 < x && x < 100)

And would love a simple `std::between()` that would take t= wo arguments and an optional third (compare function) argument.
<= br>

templated<typename T, typename Comp= are>
bool std::between(T lower, T upper, Compare comp)
{
=C2=A0 =C2=A0 return comp(lower) && comp(upper);
}

Does anything like this exist? Should I p= ropose it!?

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--
Who=E2=80=99s= got the sweetest disposition?
One guess, that=E2=80=99s who?
Who=E2= =80=99d never, ever start an argument?
Who never shows a bit of temperam= ent?
Who's never wrong but always right?
Who'd never dream of= starting a fight?
Who get stuck with all the bad luck?

--
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To view this discussion on the web visit https://groups.google.com/a/isocpp.org/d/msgid/std-proposals/CAFdMc-36tAQ1= JJxYOz3PEKv1qnGs%3DWPGN3NWWKCEwY%2BSgNdDXA%40mail.gmail.com.
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