From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-ed1-x532.google.com (mail-ed1-x532.google.com [IPv6:2a00:1450:4864:20::532]) by sourceware.org (Postfix) with ESMTPS id 3BBE4385C421 for ; Wed, 23 Aug 2023 08:49:01 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 3BBE4385C421 Authentication-Results: sourceware.org; dmarc=pass (p=none dis=none) header.from=gmail.com Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=gmail.com Received: by mail-ed1-x532.google.com with SMTP id 4fb4d7f45d1cf-52a23227567so1117133a12.0 for ; Wed, 23 Aug 2023 01:49:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1692780540; x=1693385340; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:from:to:cc:subject:date:message-id:reply-to; bh=MxdN6yb2eqkqjeTyDbbSN2m8GER1wn0LVULLuD/0XM0=; b=HGAN+Mxg4sz9WYj4/sBFGiqxh2uQMnbeoz7FoeIPOPpAJEON7oov6OhZu16rboI6JZ 67due4DUm08Er/sC2szN9NYZ2uOJQ3i4UNc+OvmF3ivZueaPqmnVVH4I8hHHzP6AZs22 NwSiARvj6zVlHpBSD2B0OImrNvkj1c6xhlBqVz26X7E0jp8zjGlrLjxoKY8Hwt3TLdDc rScZkd9sb28d/CjTKyfWodlOBhHgMLnMSrwd0/8bUK/FeD+xEAxx9/8Vk4MZiKojikNk HWA27Cul5dbEUJjdq9oiqr29vvIvIEiiqhpnUPiwbG/7buRnFtNFchqMR27zpebTtFQU FC7A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1692780540; x=1693385340; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=MxdN6yb2eqkqjeTyDbbSN2m8GER1wn0LVULLuD/0XM0=; b=Ywsk+xHMUotLr2aLAsslMOjn2aHjLIM86CDVID+h3pwEvx54z57fj1rphuaFnU/uV1 1NkH0m/ZCSv8t1YCTvoPEFZrRlcTeHjPZyj0nDBnzXwLTT4ZAPJiDMT7/E5qTZrM8m0W tIn9vyCJBbl4UjGI5kgN2vKVyFfIfENqaWINnZGBIlnYotOFu2OmPQWPz2Yedzjg3OVj sWW79Sv9A99FDZEJiU8kCziTyJc8gLHBftBB3iaf+Tau/w65LzLJ9eR4O6sU/25Rdzvq Zb475lszAmhWN6sjP9TTpnmMRv2Se2Y6UmCRmgUsZwITlZtRkILMIavjnBbGyPvMe1h8 hgdQ== X-Gm-Message-State: AOJu0YxfUv8J+cP6xNPE89GWrers+dmKKZAcO0wa5H1oBOIbGdduAtlG 5qma3VaR7uNxXvk1IIfFHKdFavxRLfNsjI0Z6fEX5/nv X-Google-Smtp-Source: AGHT+IETMJ3PSaqhWeDTZsDtIRwZzqB6F6wJySPfU2M+dJkBNrr7oTqlJLYH4jq3OHnyoppKXq/Uo7M/LytYQPmhdpY= X-Received: by 2002:a17:906:301a:b0:9a1:c448:3c35 with SMTP id 26-20020a170906301a00b009a1c4483c35mr2460004ejz.68.1692780539585; Wed, 23 Aug 2023 01:48:59 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: From: Jonathan Wakely Date: Wed, 23 Aug 2023 09:48:48 +0100 Message-ID: Subject: Re: RTTI names for classes in anonymous namespaces. To: Varun Kumar E Cc: "libstdc++" Content-Type: multipart/alternative; boundary="000000000000bea97b0603932e57" X-Spam-Status: No, score=-0.7 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: --000000000000bea97b0603932e57 Content-Type: text/plain; charset="UTF-8" On Wed, 23 Aug 2023, 09:19 Varun Kumar E via Libstdc++, < libstdc++@gcc.gnu.org> wrote: > hello all, > > The RTTI names generated by gcc for classes in anonymous namespaces > begin with the prefix asterisk(*). Could you please explain the reasoning behind this? It means that type_info equality can be determined by just comparing the const char* pointers, instead of using strcmp to match equal names. The pointer value will be unique, so will only compare equal to itself. As Itanium ABI > c++ has no mention of this. > The Itanium ABI doesn't dictate the form of those strings. When you call std::type_info::name() the '*' is not in the result. It's just an implementation detail. --000000000000bea97b0603932e57--