From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-lf1-x12d.google.com (mail-lf1-x12d.google.com [IPv6:2a00:1450:4864:20::12d]) by sourceware.org (Postfix) with ESMTPS id 18A5E3858CDA for ; Wed, 19 Apr 2023 12:35:54 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.2 sourceware.org 18A5E3858CDA 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-lf1-x12d.google.com with SMTP id 2adb3069b0e04-4ec817060cdso2847997e87.3 for ; Wed, 19 Apr 2023 05:35:54 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1681907752; x=1684499752; h=cc:subject:message-id:date:from:in-reply-to:references:mime-version :from:to:cc:subject:date:message-id:reply-to; bh=weq53WB1vnjJf38i3zaejf5td7jg5Hsk2Y3/seBV0iM=; b=ZbsGThPWEi8/JE9nFJnzFa+H29M5vkJ3q+H2sIRP45kd69pMq+6cjHtl3h1Krf0rEe Rw8esKnlL3CiQU3vSzgANewv2fCrbrXwVMYI4Citg5hwXjqNSxu5USeE7FSDdizqKE9s eRZ+tyiB17l70c4MJvKl1gtE+M/kFwfF1Vrf86nyWrj8LrV75q5VxG4aZW35jYaqdd21 JOD5IJC5vS+1kvULGP6mE3R673XlosuSkQLNXFU+1ylLTJyjsGbQfjPV9CiPrQMvYiH4 VmlTq/AZXBXLfcQuou8lgIUBDurnTZEshU/imihT60oHRmSIDZIAE/Cm54fZxts51ZAN IcUQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1681907752; x=1684499752; h=cc: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=weq53WB1vnjJf38i3zaejf5td7jg5Hsk2Y3/seBV0iM=; b=I2WtZUnO1sn6/AcVi4Z0uOXmy1Vc/lomTaOSIRJM8ynYY5VK4t/50uX6wTez47UkcH vdpYjYsCPZNU1b6MWnLsTtKFlPfw371dAUoe/ocRanNWccpK/avQ1cFil6D08UIOV9fY 0oGTijCWM5b/Pem318DgOt9B/GkwvqDiX4w9PB3+bQzv6ULavS4AOKZ9qV/Y3V0JGZ5I DeQeIqmis43VaatW8yE3PsYNIsQoK+aCYCdZnU9cRpxPdaFldzjZpuaTYCVOqyl/bHyu 2lJ93WDtfHdI4aAD90Qk7apk2sYxZ0RZNoI50s5LhMT3nR1hlbuMMRvonjFGL4aRu+1r XVmQ== X-Gm-Message-State: AAQBX9fxrHI0vF6UjsAVd9AyLnTiCaUAYX2lkU5i2Buw93y0O88rAqJg w5qog/aU0+gAeU6Ylb7zqNnLLdf0btqDr5+AxSxFqio30SiO7Q== X-Google-Smtp-Source: AKy350b0DPxRw7IgqwuGdgBjt80uBeGlsviDQiMq0wiySzEgEwhCbz/GKth+s42qyMSTh48WFkrAQafbWlKbwmxLSyE= X-Received: by 2002:ac2:5296:0:b0:4ed:d629:8d38 with SMTP id q22-20020ac25296000000b004edd6298d38mr936519lfm.4.1681907752242; Wed, 19 Apr 2023 05:35:52 -0700 (PDT) MIME-Version: 1.0 References: <4b7bcfa747873836baa77c042087545330396996.camel@xry111.site> In-Reply-To: <4b7bcfa747873836baa77c042087545330396996.camel@xry111.site> From: Andy Date: Wed, 19 Apr 2023 14:35:40 +0200 Message-ID: Subject: Re: How to explain this syntax? Cc: gcc-help@gcc.gnu.org Content-Type: text/plain; charset="UTF-8" X-Spam-Status: No, score=0.9 required=5.0 tests=BAYES_00,DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_FROM,MISSING_HEADERS,RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS,TXREP,T_SCC_BODY_TEXT_LINE autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org List-Id: I don't learn C, but I am writing c90 Antlr grammar which should be as compatible with GCC as possible. I see many GNU extension, one is most significant is nested functions, but all code is compilable with GCC with std=c90, not need std=gnu90, although some code is compilable only with std=gnu90