Re: [Qemu-devel] Re: [PATCH 10/14] Zero json struct with memset() instea of = {} to keep compiler happy.

[Paolo Bonzini]

On 08/30/2010 06:29 PM, Anthony Liguori wrote:
> > Arguably, an empty initializer should be special cased, but it
> > isn't.
>
> So the warning is for old style initializer lists?  I disagree that
> it's a valid warning.  First, {} is ambiguous as it can be an empty
> list of c99 initializers and an empty list of c89 initializers.

Yes, that's what I meant.  {} should be special cased as an empty list
will rarely be a bug, even when C89 initializers are used.

> But even for c89 initializers, it's very common practice to omit
> initializers and rely on the defaulted value.  For instance, { 0 } is
> quite pervasive as an idiom.

That's why the warning is only in -Wextra.  Those are warnings that may 
clash with someone's style conventions.

Paolo