Newsgroups: php.internals Path: news.php.net Xref: news.php.net php.internals:113884 Return-Path: Delivered-To: mailing list internals@lists.php.net Received: (qmail 40386 invoked from network); 31 Mar 2021 18:53:48 -0000 Received: from unknown (HELO php-smtp4.php.net) (45.112.84.5) by pb1.pair.com with SMTP; 31 Mar 2021 18:53:48 -0000 Received: from php-smtp4.php.net (localhost [127.0.0.1]) by php-smtp4.php.net (Postfix) with ESMTP id 115AB180503 for ; Wed, 31 Mar 2021 11:51:23 -0700 (PDT) X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on php-smtp4.php.net X-Spam-Level: X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,NICE_REPLY_A, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL,SPF_HELO_NONE, SPF_PASS autolearn=no autolearn_force=no version=3.4.2 X-Spam-Virus: No X-Envelope-From: Received: from mail-ej1-f42.google.com (mail-ej1-f42.google.com [209.85.218.42]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange ECDHE (P-256) server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by php-smtp4.php.net (Postfix) with ESMTPS for ; Wed, 31 Mar 2021 11:51:22 -0700 (PDT) Received: by mail-ej1-f42.google.com with SMTP id u21so31563038ejo.13 for ; Wed, 31 Mar 2021 11:51:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=subject:to:references:from:message-id:date:user-agent:mime-version :in-reply-to:content-transfer-encoding:content-language; bh=Zj/FarUoBonLBRKeJJR83XjXgzurIYx7ja2gBnr2MKI=; b=dwig1DtDRXJV476QYoFIHBNgFd/4xHaLlPc+X9tSRvdV/drIAcMP/JRVs2zXmL4Rg/ Uie84iWuFmYXGkeZY4+0PbAh77bAYFXpoMnHCk7yQGxJQHsb0Kwh5Bd47A+gU5O1YuDZ mxo0pAgzsGQYm1Eq86+8I9cqyqgZ4cmSMyxKhwQ3WKPXBoZgbkaBcBhJifTAVxPl/vIR ux4S/kqNUcqGqQPLi6G3hyBwG8T4YaHhnlpGMXiTQQtVlItVlaCbWZbl8IP6uC0B3kdj AxJdngfivo7wbxeR0UMsJ7fVorpk1pzM2gGjH9RWVGbFL0EgwnX5HMCa4hKS5DviOS3O gLpw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:subject:to:references:from:message-id:date :user-agent:mime-version:in-reply-to:content-transfer-encoding :content-language; bh=Zj/FarUoBonLBRKeJJR83XjXgzurIYx7ja2gBnr2MKI=; b=gRU8GzwLDYaZ9G+ENpH2kq8toCV1WAxQG3udWCoOiXvldhOJUxzVwvmgEGDmDDZyEI b/t+Q/rOSf1PCIHVvZtX6tntHfMM8swfAOnEJOhsjPvmSA+P2BRTjZoXgj9GkkPPW5Bh /VxLsOmNJVyLfNgaqHfdzktJ3HZsmWkPgf+Rsc9Z1rnR5LeyWDttWsgh/WNPDtL6wv5g Bdszoc4ipKVGassrbkQDfhReEX8yDyg5/E367JqMiEi7l9/lY9ltZ5GBgQrAmdtPIrmo 88xxeXxOdmRJitN3xgLHHlWo397b+XDJxlqIIeyJsnCh5vUi5eMAq3GAWtpdfxyynVtu WoFg== X-Gm-Message-State: AOAM5330WrtoDIf4d2bV60kJKXx1KidbiWjzdthIHbPK2mVOfOhlAed1 QSAJITR8d79YAQoLfYNgdHtYQduh1ZI= X-Google-Smtp-Source: ABdhPJxmznPNLrvK4TyycflCjhtKOdwGnykasAUzbzQ54ZWI1xf+CVr7z5ufvp+IQau4QHzxEcza2g== X-Received: by 2002:a17:906:3b48:: with SMTP id h8mr5042073ejf.261.1617216679831; Wed, 31 Mar 2021 11:51:19 -0700 (PDT) Received: from [192.168.0.22] (cpc104104-brig22-2-0-cust548.3-3.cable.virginm.net. [82.10.58.37]) by smtp.googlemail.com with ESMTPSA id b22sm2048293edv.96.2021.03.31.11.51.18 for (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 31 Mar 2021 11:51:19 -0700 (PDT) To: internals@lists.php.net References: Message-ID: <54cb9b32-755a-7e4a-7645-f90a0df1eab8@gmail.com> Date: Wed, 31 Mar 2021 19:51:19 +0100 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.9.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-GB Subject: Re: [PHP-DEV] Any reason why backed enums are limited to int and string only? From: rowan.collins@gmail.com (Rowan Tommins) On 31/03/2021 19:44, Olle Härstedt wrote: > enum Result: mixed { > case Ok = null; > case Error = null; > } Sounds like what you're looking for is not "pure" enums, but Algebraic Data Types. Larry and Ilija have a grand plan for adding those, but there's a few steps to go yet: https://wiki.php.net/rfc/adts The current enum values are just constants for simplifying serialization and lookup (translating to a code or database ID). Regards, -- Rowan Tommins [IMSoP]