220 28082 article Path: news.gmane.org!.POSTED!not-for-mail From: "Vicente J. Botet Escriba" Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Re: Re: Make (strongly typed) enums castable to char const * const Date: Wed, 31 Aug 2016 22:20:17 +0200 Lines: 184 Approved: news@gmane.org Message-ID: References: <878tvfl89r.fsf@gmail.com> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: blaine.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="------------C3C4909328531A2728497738" X-Trace: blaine.gmane.org 1472674822 29154 195.159.176.226 (31 Aug 2016 20:20:22 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Wed, 31 Aug 2016 20:20:22 +0000 (UTC) User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.11; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 Cc: chochlik@gmail.com To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBDH67CONY4PBB77XTS7AKGQE5WTYLLQ@isocpp.org Wed Aug 31 22:20:17 2016 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-wm0-f69.google.com ([74.125.82.69]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1bfBzb-00070h-E9 for gclcip-std-proposals@m.gmane.org; Wed, 31 Aug 2016 22:20:15 +0200 Original-Received: by mail-wm0-f69.google.com with SMTP id u81sf45984791wmu.3 for ; Wed, 31 Aug 2016 13:20:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=isocpp-org.20150623.gappssmtp.com; s=20150623; h=subject:to:references:cc:from:message-id:date:user-agent :mime-version:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=JE9trEFp1UbM8iTEsv6Elt9Aedv4yMKBVZDCzTyj+0o=; b=ymuIxCsQiVeSnvDuBYbqwVs/zVxMGe2qqIQJq+4HzFDCTiRcPTRTN+jvTdyspitxuy y+y6hW5AItAKTK2o1/34gxckB6QzEFOfhwWSHcOnP3gNdoOFwpxCfvx9v3Ljy5849ayg ya9kcAW8WCoQQfrCR+Er8xSr36UfzzbM1o1HDfGGob2UlDklWZVOm/4k9tbX7ykFW1F/ OQxvDO7VF3zwPYDIJXcHVpTjZyarvGyybK3UWKUBe3UpApoV18rS5TQOMes4utjJxKj/ lIwRmgkqylDjopF6G1UfyQzQSvgr7ZRK84Adf1GSFQMGr8KaaSm82Bk+szEsoijO+RyU wtkg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:subject:to:references:cc:from:message-id:date :user-agent:mime-version:in-reply-to:x-original-sender :x-original-authentication-results:reply-to:precedence:mailing-list :list-id:x-spam-checked-in-group:list-post:list-help:list-archive :list-subscribe:list-unsubscribe; bh=JE9trEFp1UbM8iTEsv6Elt9Aedv4yMKBVZDCzTyj+0o=; b=QtR/ZfXVgrZkuGewx6JxyP/teiYK+n2+HA3Km6IjfrE40pwKzKaeCAG5AIZO7LKoE3 e4DAaXfknhNjnVJFZrIewOIzGTLhDSaoAQXgn1sOuKcK0nnJg1Xv8EkDPNELVIb6LF9Q YpFrnmmBb52A2dHbWdQ4XHkVJbKmmOs5Eooa8DqKyCQ5glIiXsguaPmzWOSpW2Ie1/Im b5IxLNjx80kl6FzzDVJWCiK/E8GmCFbzEo2tm2kt6khwqqn1dixTkZRB7+GPH2aJsy+O K1rwaxXpC9ObrhepzqfCNg1yhTUNVbQXLizp6RyFRQFpQCZWnd33IGXO8bDgilV4s9Hp zFCA== X-Gm-Message-State: AE9vXwNOWp5tTDVOaDbxKg9b9jetv3hoXXlNLdADyZ4OcgBc0AbeKx3SpnuzS96A8JoDiw== X-Received: by 10.194.121.137 with SMTP id lk9mr1783401wjb.0.1472674816547; Wed, 31 Aug 2016 13:20:16 -0700 (PDT) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.28.5.75 with SMTP id 72ls298522wmf.15.gmail; Wed, 31 Aug 2016 13:20:15 -0700 (PDT) X-Received: by 10.28.61.215 with SMTP id k206mr22393691wma.80.1472674814983; Wed, 31 Aug 2016 13:20:14 -0700 (PDT) Original-Received: from smtp.smtpout.orange.fr (smtp10.smtpout.orange.fr. [80.12.242.132]) by mx.google.com with ESMTPS id c3si1732025wjv.231.2016.08.31.13.20.14 for (version=TLS1 cipher=AES128-SHA bits=128/128); Wed, 31 Aug 2016 13:20:14 -0700 (PDT) Received-SPF: neutral (google.com: 80.12.242.132 is neither permitted nor denied by best guess record for domain of vicente.botet@wanadoo.fr) client-ip=80.12.242.132; Original-Received: from pc38.home ([2.13.33.56]) by mwinf5d33 with ME id dwLA1t00h1CfgbE03wLC46; Wed, 31 Aug 2016 22:20:14 +0200 X-ME-Helo: pc38.home X-ME-Auth: dmljZW50ZS5ib3RldEB3YW5hZG9vLmZy X-ME-Date: Wed, 31 Aug 2016 22:20:14 +0200 X-ME-IP: 2.13.33.56 In-Reply-To: X-Original-Sender: vicente.botet@wanadoo.fr X-Original-Authentication-Results: mx.google.com; spf=neutral (google.com: 80.12.242.132 is neither permitted nor denied by best guess record for domain of vicente.botet@wanadoo.fr) smtp.mailfrom=vicente.botet@wanadoo.fr 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:28082 Archived-At: This is a multi-part message in MIME format. --------------C3C4909328531A2728497738 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: quoted-printable Le 30/08/2016 =C3=A0 13:05, Edward Catmur a =C3=A9crit : > On Tuesday, 30 August 2016 06:23:04 UTC+1, Matus Chochlik wrote: > > I've added few examples showing simple implementation of > enumerator-to-string and string-to-enumerator using both the TMP and > constexpr MP libraries to the mirror reflection utilities: > > https://github.com/matus-chochlik/mirror/blob/develop/example/mirror/= 005_enum_to_string.cpp > > > https://github.com/matus-chochlik/mirror/blob/develop/example/mirror/= 006_string_to_enum.cpp > > > https://github.com/matus-chochlik/mirror/blob/develop/example/puddle/= 005_enum_to_string.cpp > > > https://github.com/matus-chochlik/mirror/blob/develop/example/puddle/= 006_string_to_enum.cpp > > > > Is it really necessary to construct the lookup table as a library=20 > container? Wouldn't a switch statement perform better? > No, we don't need a map, but I believe that Matus wanted to show a probe=20 of concept. I don't know how we can generate a switch with the current language. We=20 can do some recursive if and expect that the compiler optimize it. Vicente --=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/ce4634af-e0ab-251b-d804-8fb721e855f9%40wanadoo.f= r. --------------C3C4909328531A2728497738 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Le 30/08/2016 =C3=A0 13:05, Edward Catmu= r a =C3=A9crit=C2=A0:
On Tuesday, 30 August 2016 06:23:04 UTC+1, Matus Chochlik wrote:
I've added few examples showing simple implementation of
enumerator-to-string and string-to-enumerator using both the TMP and
constexpr MP libraries to the mirror reflection utilities:

https://github.com/matus-chochlik/mirror/blob/devel= op/example/mirror/005_enum_to_string.cpp
https://github.com/matus-chochlik/mirror/blob/devel= op/example/mirror/006_string_to_enum.cpp
https://github.com/matus-chochlik/mirror/blob/devel= op/example/puddle/005_enum_to_string.cpp
https://github.com/matus-chochlik/mirror/blob/devel= op/example/puddle/006_string_to_enum.cpp=C2=A0
=C2=A0
Is it really necessary to construct the lookup table as a library container? Wouldn't a switch statement perform better?

No, we don't need a map, but I believe that Matus wanted to show a probe of concept.

I don't know how we can generate a switch with the current language. We can do some recursive if and expect that the compiler optimize it.

Vicente

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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/ce4634af-e0ab-251b-d804-8fb721e855f9= %40wanadoo.fr.
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