organization of C Extensions in manual

[Joseph Myers]

On Sun, 25 Jan 2015, David Wohlferd wrote:

> >> Arrays and Vectors
> >>      Designated Inits: Labeling elements of initializers.
> >
> > I think this one might better be placed in a section on initializers.
> 
> Since the only place 'Designated Inits' can be used is on arrays, placing this
> in the 'Arrays and Vectors' section seems appropriate.

Designated initializers apply to both array elements and structure and 
union members.

(This is another case that logically would describe (a) that the C99 
feature is accepted for older standards; (b) a limited subset is accepted 
for C++; (c) there's also this legacy pre-standard syntax you may see in 
existing code but shouldn't used in new code.)

-- 
Joseph S. Myers
joseph@codesourcery.com