From: Luiz Capitulino <lcapitulino@redhat.com>
To: Anthony Liguori <anthony@codemonkey.ws>
Cc: Paolo Bonzini <pbonzini@redhat.com>,
aliguori@us.ibm.com, qemu-devel@nongnu.org
Subject: [Qemu-devel] Re: [PATCH 0/6]: QMP: Fix issues in parser/lexer
Date: Thu, 20 May 2010 13:29:32 -0300 [thread overview]
Message-ID: <20100520132932.02a6efac@redhat.com> (raw)
In-Reply-To: <4BF55ADA.5080807@codemonkey.ws>
On Thu, 20 May 2010 10:52:58 -0500
Anthony Liguori <anthony@codemonkey.ws> wrote:
> On 05/20/2010 10:18 AM, Paolo Bonzini wrote:
> > On 05/19/2010 11:43 PM, Anthony Liguori wrote:
> >>
> >>> 4. Lexer expects a 'terminal' char to process a token
> >>>
> >>> Which means clients must send a sort of end of line char, so
> >>> that we
> >>> process their input.
> >>>
> >>> Maybe I'm missing something here, but I thought that the whole
> >>> point of writing our own parser was to avoid this.
> >>
> >> If the lexer gets:
> >>
> >> "abc"
> >>
> >> It has no way of knowing if that's a token or if we're going to get:
> >>
> >> "abcd"
> >
> > Only } and ] are valid characters at the end of a JSON object, and
> > neither requires lookahead.
>
> Having look ahead operate differently for different states really
> complicates the lexer. I don't see this as a big problem in practice.
Would be a nice feature, but it's fine for me too and we'll have to
note that in the QMP's spec.
next prev parent reply other threads:[~2010-05-20 17:34 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-05-19 21:15 [Qemu-devel] [PATCH 0/6]: QMP: Fix issues in parser/lexer Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 1/6] json-lexer: Initialize 'x' and 'y' Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 2/6] json-lexer: Handle missing escapes Luiz Capitulino
2010-05-19 21:44 ` Anthony Liguori
2010-05-20 13:44 ` Luiz Capitulino
2010-05-20 15:16 ` [Qemu-devel] " Paolo Bonzini
2010-05-20 15:25 ` Luiz Capitulino
2010-05-20 15:26 ` Paolo Bonzini
2010-05-20 15:35 ` Luiz Capitulino
2010-05-20 15:54 ` Anthony Liguori
2010-05-20 16:27 ` Luiz Capitulino
2010-05-20 15:50 ` Anthony Liguori
2010-05-20 16:27 ` Luiz Capitulino
2010-05-20 16:55 ` Anthony Liguori
2010-05-20 18:47 ` Luiz Capitulino
2010-05-20 18:52 ` Anthony Liguori
2010-05-20 19:22 ` Luiz Capitulino
2010-05-24 19:29 ` Anthony Liguori
2010-05-24 19:38 ` Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 3/6] qjson: Handle "\f" Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 4/6] check-qjson: Add more escape tests Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 5/6] json-lexer: Drop 'buf' Luiz Capitulino
2010-05-19 21:15 ` [Qemu-devel] [PATCH 6/6] json-streamer: Don't use qdict_put_obj() Luiz Capitulino
2010-05-19 21:43 ` [Qemu-devel] [PATCH 0/6]: QMP: Fix issues in parser/lexer Anthony Liguori
2010-05-20 13:35 ` Luiz Capitulino
2010-05-21 18:06 ` Luiz Capitulino
2010-05-20 15:18 ` [Qemu-devel] " Paolo Bonzini
2010-05-20 15:26 ` Luiz Capitulino
2010-05-20 15:52 ` Anthony Liguori
2010-05-20 16:29 ` Luiz Capitulino [this message]
2010-05-21 9:08 ` [Qemu-devel] [PATCH] do not require lookahead in json-lexer.c if not necessary Paolo Bonzini
2010-05-21 10:10 ` [Qemu-devel] [PATCH] do not require lookahead for escapes too Paolo Bonzini
2010-05-23 7:50 ` [Qemu-devel] " Paolo Bonzini
2010-05-20 19:49 ` [Qemu-devel] [PATCH 0/6]: QMP: Fix issues in parser/lexer Avi Kivity
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