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From: "Jeffrey R. Carter" <jrcarter@acm.org>
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Subject: Re: Why does this work? (overloads)
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Jerry wrote:
>>
> Yes, but  time series are usually indexed from 0. Sometimes, the FFT
> of a time series is indexed from 0 and sometimes -NN/2 .. NN/2-1. When
> one uses a time series in a vector or matrix, conundrums obviously
> arise, not only in computer code but in print. I once figured out how
> to make Pascal let me have it both ways by declaring both types, one
> type indexed 0..NN-1 and the other 1..NN, and then I set a pointer of
> one type to an array originally declared with another type. I'm
> guessing that Ada doesn't allow this, however.

No pointers needed:

A : Vector (0 .. N - 1);
B : Vector (1 .. A'Length);

A := B;
B := A;

This is called sliding.

-- 
Jeff Carter
"It's all right, Taggart. Just a man and a horse being hung out there."
Blazing Saddles
34