Context-Free Grammars? What about arrays?

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Hi,

I think I'm having a little trouble understanding what's meant by context-free
grammar. I've read that D is context-free, but is it really? What about an
expression like:

int[U] s;

? You can't tell -- without looking at the context -- whether U is a data type
or a number, and so because associative arrays and regular arrays are
syntactically different elements of the language, the syntax of D is tied in
with its semantics, just like in C++.

So is D really context-free? Or am I misunderstanding the meaning of the term?

Thanks!