Is [] mandatory for array operations?

[Kagamin]

Don Wrote:

> Two questions. (1) What happens with functions? For example:
> x[] = sin(y[]);
> OR
> x[] = sin(y[])[];
> 
Array op is effectively a statement-wide operation (it can be even deemed as a statement itself), braces are the hint which arrays are iterated. Since sin's result is not an array, you can't apply array op to it, so the first syntax is correct.