From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr1-x433.google.com (mail-wr1-x433.google.com [IPv6:2a00:1450:4864:20::433]) by sourceware.org (Postfix) with ESMTPS id CB0443858D28 for ; Fri, 31 Mar 2023 15:24:16 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org CB0443858D28 Authentication-Results: sourceware.org; dmarc=none (p=none dis=none) header.from=jguk.org Authentication-Results: sourceware.org; spf=pass smtp.mailfrom=jguk.org Received: by mail-wr1-x433.google.com with SMTP id t4so17588312wra.7 for ; Fri, 31 Mar 2023 08:24:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=jguk.org; s=google; t=1680276255; h=content-transfer-encoding:to:subject:from:content-language :user-agent:mime-version:date:message-id:from:to:cc:subject:date :message-id:reply-to; bh=Zl8PkhFniiOmaSQEmMsM2gWoSbEdRHiCzdMuX7Jkpq8=; b=rCGTobFJkg5s98rr90dsCeYIOgvgjaE6Gu8eiFV7+KrYVwzC7Xr4eWNbUJG0bGmQTS oNTTLhRhIZa6yVRSyBc5+wf3Lt4g0eCav5DQS2PtFk64GeTlIxamwPJGvB8dzGjsPN59 FmKbZInEjPQ79tD8Le/ScSH/OsqxzFzbtPLVIYFr4vFALw16Gb4SHoKDMyMBYtRvXSSp VAQM76euzFvmHBtHahwmqK6nOrsHpjrRoH6YgWCnVpUvi3YpG7bd+oqjJKHxmASj6/YH iUzsFlXFRYcHAPuR6XLrU8m8KmjDm/RBIt/lz0CrCUPj2WJ21omQvmyMX6lwCOK/2PKo L1Cg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1680276255; h=content-transfer-encoding:to:subject:from:content-language :user-agent:mime-version:date:message-id:x-gm-message-state:from:to :cc:subject:date:message-id:reply-to; bh=Zl8PkhFniiOmaSQEmMsM2gWoSbEdRHiCzdMuX7Jkpq8=; b=z/+dP0HCxYSYt19aVqcnA2Lj3oCdBCXjH37dajA72tRX2kYrwa/yBWNqq8HZmp7eO0 z0AGGAerEn7K+lbrqNEe5I0f1LRceCQH51cRQgFo1tkG09anbHXPON8L5FerK0Fv35ob M0bj/jMGJ1lDvp82OyIvJAySZ+yXsSR0/LHDYjGFayLRSd36sn7wFIEVSVmliKSD+IHN 9NoM4R83egRMJ3tbB51MLr/uPHWkyp/6fIkLeHhocQENv9HCssK5KkjJqJ7qYRf2dpIx q4fFoAUqX3C3JK7MY853Rol22i4q4aRYMnN9aFv3vBbQFz2KGh/TVwte9hg24Rc/m9D8 3JLw== X-Gm-Message-State: AAQBX9feiHmoLEVe2JI/Qh5sV6kLdUbuW+rMlH15wxqGFtW6TqlDxdJ6 U2qnK2gArORa5Ys4WZ4hsoUlhqvTP+Q1zNr6NYM= X-Google-Smtp-Source: AKy350a8JjcAA+DVH9I7WM/uLnpUJhECY+Bnc3AvGMcw/lc+G3HthAp8FHCP9giBWBwVj+PXg3aqwQ== X-Received: by 2002:a5d:4a0f:0:b0:2d3:bfcc:1b11 with SMTP id m15-20020a5d4a0f000000b002d3bfcc1b11mr18717056wrq.42.1680276255516; Fri, 31 Mar 2023 08:24:15 -0700 (PDT) Received: from [192.168.0.12] (cpc87345-slou4-2-0-cust172.17-4.cable.virginm.net. [81.101.252.173]) by smtp.gmail.com with ESMTPSA id x9-20020a5d4449000000b002e40d124460sm2439514wrr.97.2023.03.31.08.24.15 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 31 Mar 2023 08:24:15 -0700 (PDT) Message-ID: <03e9c7d6-95a0-bd2e-fa31-91919ad76f3f@jguk.org> Date: Fri, 31 Mar 2023 16:24:14 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.9.0 Content-Language: en-GB From: Jonny Grant Subject: libstdc++ Chapter 28. Demangling example To: libstdc++@gcc.gnu.org Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-Spam-Status: No, score=-3.0 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,KAM_SHORT,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: Hello I tried out this code. Maybe I'm doing something wrong? https://godbolt.org/z/Y78h4f1W6 https://gcc.gnu.org/onlinedocs/gcc-12.2.0/libstdc++/manual/manual/ext_demangling.html However only get reduced output after status -2 is returned: std::bad_exception => Looks like std::cout gets broken by the nullptr realname (that's a frustration). So I put an if(realname) in the godbolt link above. Maybe it's also a good time to update the example abi::__cxa_demangle call from those 0 parameters to be NULL? Cheers, Jonny