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Re: [Qemu-devel] [PATCH 07/18] qom: add link properties

From: Avi Kivity
Subject: Re: [Qemu-devel] [PATCH 07/18] qom: add link properties
Date: Thu, 01 Dec 2011 16:03:22 +0200
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:8.0) Gecko/20111115 Thunderbird/8.0

On 12/01/2011 03:44 PM, Anthony Liguori wrote:
>> So, links are equivalent to pointers?
> Yup.  Once we have qom inheritance (next stage), we can have a
> link<PCIDevice> property and you'll be able to set it to an E1000State
> with the appropriate casting and error checking taking place.

I really like this goal but can't help feeling that we're stretching C
beyond its limits here, so that the client code ends up
boilerplate-heavy.  Kind of like the issue with local_err elsewhere in
this thread, where you juggle things instead of a "throw
Exception(...)".  What does the client code looks like for link<PCIDevice>?

error compiling committee.c: too many arguments to function

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