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From: Ivan Levashew <octagram@bluebottle.com>
Newsgroups: comp.lang.ada
Subject: Re: Vector of Vectors.
Date: Sat, 17 Jan 2009 02:20:28 -0800 (PST)
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Date: 2009-01-17T02:20:28-08:00
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> >
> > Ada explicitly emphasizes ease of reading over ease of writing (ARM Introduction).
>
> Not in this case.
>
> I agree that the "extra typing" is not the problem.  The problem is that
> you have to read all that junk you typed, and it's mostly content free.

A: Because it messes up the order in which people normally read text.
Q: Why is top-posting such a bad thing?
A: Top-posting.
Q: What is the most annoying thing in e-mail?

Top-posting is what actually happens when one uses downwards closures.
In my case, I had to iterate map of vectors. "Iterate" procedure
passes my
closure just Cursor. I need to invoke Update_Element on Cursor, then
Iterate the Vector, then Update_Element on Vector.
4 levels so far.

Downwards closures is rather easy way to write write-only Ada code.

I've specified the order in which I wrote every line. There are just 2
levels here.

1 declare
5    procedure ...(...) is
9       procedure ...(...) is
...
10      begin
12         Iterate (..., ...'Acess);
11      end ...;
6    begin
8       Update_Element (..., ...'Access);
7    end ...;
2 begin
4   Iterate (...., ...'Access);
3 end;

Do you read in the same order?

I'd like to have a syntax like this:

Iterate (..., ..., new procedure (...) is
   begin
...
   end;);

Procedure name should be optional, I think.