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From: David Howells <dhowells@redhat.com>
To: Jan Engelhardt <jengelh@inai.de>
Cc: dhowells@redhat.com, linux-api@vger.kernel.org,
	linux-kbuild@vger.kernel.org, Coly Li <colyli@suse.de>,
	Kent Overstreet <kent.overstreet@gmail.com>,
	linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array
Date: Tue, 09 Oct 2018 16:41:06 +0100	[thread overview]
Message-ID: <17992.1539099666@warthog.procyon.org.uk> (raw)
In-Reply-To: <nycvar.YFH.7.76.1810021622320.11696@n3.vanv.qr>

Jan Engelhardt <jengelh@inai.de> wrote:

> """it [the array size expression] shall be a converted constant expression of
> type std::size_t and its value shall be greater than zero."""
> —http://eel.is/c++draft/dcl.array

Interesting.  You're not actually quoting the full sentence:

	If the constant-expression is present, it shall be a converted
	constant expression of type std​::​size_­t and its value shall be
	greater than zero.

This suggests that:

	__u64 ptr[]

is actually valid since:

	D1 [ constant-expressionopt ] attribute-specifier-seqopt

suggests that the part between the brackets is optional.

David

  parent reply	other threads:[~2018-10-09 15:41 UTC|newest]

Thread overview: 37+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-09-05 15:54 [RFC] UAPI: Check headers by compiling all together as C++ David Howells
2018-09-05 15:54 ` [PATCH 01/11] UAPI: drm: Fix use of C++ keywords as structural members David Howells
2018-09-05 15:54 ` [PATCH 02/11] UAPI: keys: " David Howells
2018-09-05 15:54 ` [PATCH 03/11] UAPI: virtio_net: " David Howells
2018-09-05 16:54   ` Greg KH
2018-09-05 17:15   ` David Howells
2018-09-05 17:35   ` Michael S. Tsirkin
2018-09-06  7:09   ` David Howells
2018-09-06 14:36     ` Michael S. Tsirkin
2018-09-05 15:55 ` [PATCH 04/11] UAPI: bcache: Fix use of embedded flexible array David Howells
2018-10-02 14:52   ` Jan Engelhardt
2018-10-09 15:41   ` David Howells [this message]
2018-10-09 16:54     ` Jan Engelhardt
2018-09-05 15:55 ` [PATCH 05/11] UAPI: coda: Don't use internal kernel structs in UAPI David Howells
2018-09-05 16:54   ` Jan Harkes
2018-09-05 17:12   ` Yann Droneaud
2018-09-05 17:28     ` Jan Harkes
2018-09-05 17:24   ` David Howells
2018-09-06  7:13   ` David Howells
2018-09-06 11:52     ` Yann Droneaud
2018-09-06 12:16       ` Jan Harkes
2018-09-06 14:53     ` David Howells
2018-09-05 15:55 ` [PATCH 06/11] UAPI: netfilter: Fix symbol collision issues David Howells
2018-09-05 15:55 ` [PATCH 07/11] UAPI: nilfs2: Fix use of undefined byteswapping functions David Howells
2018-09-05 22:20   ` Al Viro
2018-09-05 15:55 ` [PATCH 08/11] UAPI: sound: Fix use of u32 and co. in UAPI headers David Howells
2018-09-06  5:59   ` Takashi Sakamoto
2018-09-06  8:17   ` David Howells
2018-09-05 15:55 ` [PATCH 09/11] UAPI: ndctl: Fix g++-unsupported initialisation in headers David Howells
2018-09-05 15:55 ` [PATCH 10/11] UAPI: ndctl: Remove use of PAGE_SIZE David Howells
2018-09-05 15:55 ` [PATCH 11/11] UAPI: Check headers build for C++ David Howells
2018-09-05 16:55 ` [RFC] UAPI: Check headers by compiling all together as C++ Greg KH
2018-09-05 17:33   ` Yann Droneaud
2018-09-05 17:42     ` Michael S. Tsirkin
2018-09-06  7:12     ` Yann Droneaud
2018-09-05 19:22   ` Jan Engelhardt
2018-09-05 17:50 ` David Howells

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