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From: "Dmitry A. Kazakov" <mailbox@dmitry-kazakov.de>
Newsgroups: comp.lang.ada
Subject: Re: ANN: Simple Components v
Date: Sun, 17 Jan 2021 07:54:12 +0100
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On 2021-01-17 06:34, reinert wrote:
>>> Convert between prefix, infix, postfix notation?
>> Convert what?
>> -- 
> 
> Here is a reference to the topic:
> 
> https://www.geeksforgeeks.org/convert-infix-prefix-notation:
> 
> Simple example:
> 
> a + b <-> +(a,b)

And what is the problem? I mean this is trivial, or I do not understand 
your question.

> The expressions could be more complex:
> 
> (a op1 b op2 (c + (d op3 e))) op4 ((f op5 g) op6)
> 
> where op1, op2 etc are operators (functions).
> 
> This may be standard for those making compilers.
> I use it to process sets (where operators are intersection, union etc)
> and a, b, c, ... above can be references to functions returning Ordered_Sets.

I do not understand this either. Set-theoretic operations form a 
lattice, no different from Ada's logical operations "and", "or", "not" 
plus "in", "not in". Same rules. Are asking about syntax or types involved?

-- 
Regards,
Dmitry A. Kazakov
http://www.dmitry-kazakov.de