Re: CC-mode highlight change between 24.5 and 25

[Davis Herring]

> > I think it very uncommon to declare a function inside another function
> > in C++: it's done in top-level instead.
>
> Is it even valid C++?

Yes.  It is a GCC extension to _define_ a function inside another 
(unless the inner function is nested inside a class defined in the outer 
function), but it is strictly conforming to declare one in C or in C++. 
(The function so-declared is indistinguishable from one declared in the 
enclosing file/namespace scope, except that its name is invisible 
outside the function containing the declaration.)

Davis

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