Re: need help learning Ada for a modula-2 programmer

[Jacob Sparre Andersen <jacob@jacob-sparre.dk>]

Jeffrey Carter wrote:
> On 01/29/2014 01:41 PM, Jacob Sparre Andersen wrote:
>>
>> Generalising the array index beyond type Integer takes up ten lines
>> in my first take on the task.  (Recursion _might_ make it shorter.)
>
> Mine is the same number of lines whether the index is numeric or
> not. 2 of the lines differ to handle non-numeric indices.

I'm curious how you're doing it.  My implementation has one declaration
of a constant (to manage shifts further than one array length) and one
return statement (split over two lines to make it more readable).

The non-numeric index version has another ten lines to make the
mathematical operations used in the return statement work on a
non-numeric index.

Hmmm...  I think I may have figured it out...

Yes.

Converting back and forth between type Index and integers in-line makes
the return statement somewhat less readable. :-(

Using Ada 2012 I can do it with exactly the requested dozen lines (two
of which are blank to improve readability ;-).

Greetings,

Jacob

PS: I'm waiting for the OP to post his/her solution before I'm going to
    post mine.  Please hurry up.
-- 
Never attribute to malice what can adequately be explained by incompetence.