From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by sourceware.org (Postfix) with ESMTPS id 9CFFE382FE67 for ; Wed, 1 Jun 2022 14:29:56 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org 9CFFE382FE67 Received: from mail-oi1-f200.google.com (mail-oi1-f200.google.com [209.85.167.200]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-516-t7ZVi4rmOGyqltXRs-UxvA-1; Wed, 01 Jun 2022 10:29:55 -0400 X-MC-Unique: t7ZVi4rmOGyqltXRs-UxvA-1 Received: by mail-oi1-f200.google.com with SMTP id w83-20020acaad56000000b0032af68a5590so1123816oie.3 for ; Wed, 01 Jun 2022 07:29:55 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=6UucqF1B/D35x7uaiG8PLuDsRNChKSRBeIAtFwMyK/0=; b=Fy9Cx81hNEZwvAZv2VjW4mHbtApRYDRPbplQmY9VsNUzk55RSxu78H5HGcdWuyBuhX mgyJntHz6L0ISb9Tv7Qhzd+UUOMbtAt75NLZ8eAHh/bPt1XuiavqKlGmkigYX9ilZUbS err/t5+RI42E4SzjzGJ3byl+c9r3RFgscWrHXZt8EMNNeJm/AbISYI840AXjkgNM3pn8 TXSj11jnze4ddBXbul/LLctzUUaQ+29lAu+8fLr4vW/odppawsVfwXY7CnugWe755ORX JKKAkrd0y+/4QPHO1xO/BlPnYd00UU0+nXTh37av74n97UlNA5hPgNQdzrnhvx+pwHxi FpyQ== X-Gm-Message-State: AOAM5317rM+zNJncvu6I5n1TezXchar8rdeuq55RC5dgvJDNJDnveLqc QGJ7mecG3fEWu/Ot/uJHJeA6VS3urua6hV/nL4gysGucc5kxe/DKBkTVHy6hI4F/SCRFtstMwUK pAHUFc6J2c8hzCp+xVn6BTjs= X-Received: by 2002:a05:6870:4307:b0:f2:3989:e85f with SMTP id w7-20020a056870430700b000f23989e85fmr21887oah.265.1654093794565; Wed, 01 Jun 2022 07:29:54 -0700 (PDT) X-Google-Smtp-Source: ABdhPJx5ljc6DXLsjI4Z/7t4IT3lObbjU9Ohsf0PmYY9+xssuAe9SbJDYqpQTs8GVKLtttawqcGhBB84dN4YEDbFaRM= X-Received: by 2002:a05:6870:4307:b0:f2:3989:e85f with SMTP id w7-20020a056870430700b000f23989e85fmr21868oah.265.1654093794285; Wed, 01 Jun 2022 07:29:54 -0700 (PDT) MIME-Version: 1.0 From: Aldy Hernandez Date: Wed, 1 Jun 2022 16:29:43 +0200 Message-ID: Subject: is_a<> with references To: GCC Mailing List X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=-5.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, RCVD_IN_DNSWL_NONE, SPF_HELO_NONE, SPF_NONE, TXREP, T_SCC_BODY_TEXT_LINE autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gcc@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 01 Jun 2022 14:29:58 -0000 Hi folks. I rolled our own is_a<> implementation for vrange, because it was trivial. We needed it to work on references, and GCC's is-a.h implementation is pointer-only. However, I now realize it confuses gengtype when adding additional types: template struct vrange_traits { // Default to something unusable. typedef void range_type; }; template<> struct vrange_traits { typedef irange range_type; }; template<> struct vrange_traits { typedef frange range_type; <-- BOO! HISS! }; build/gengtype \ -S /home/aldyh/src/gcc/gcc -I gtyp-input.list -w tmp-gtype.state /home/aldyh/src/gcc/gcc/value-range.h:291: type `range_type' previously defined /home/aldyh/src/gcc/gcc/value-range.h:285: previously defined here Can some gengtype guru offer guidance? Thanks. Aldy