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From: "Randy Brukardt" <randy@rrsoftware.com>
Newsgroups: comp.lang.ada
Subject: Re: Can Ada print coloured/styled text to the terminal? (ANSI escape
 sequences?)
Date: Tue, 7 Aug 2018 17:31:25 -0500
Organization: JSA Research & Innovation
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Date: 2018-08-07T17:31:25-05:00
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"Per Sandberg" <per.s.sandberg@bahnhof.se> wrote in message 
news:FS9aD.1212605$Vv2.679376@fx06.am4...
...
> Yes these source-code libraries are strongly associated with GNAT, but 
> most of the code is compilable with "any" ada-12 compiler without change 
> and they are battle proven so whey not use them instead of reinventing the 
> wheel.

(1) There aren't any other full Ada-2012 compilers, so this is an empty 
statement. Portable Ada code has to be in Ada 2005 at most.
(2) Code that is truly portable has to be have been compiled with multiple 
Ada compilers. Every Ada compiler has bugs, and some of those bugs include 
allowing too much. (Experience is that around 20% of new ACATS tests for 
existing features fail on existing compilers; that seems pretty constant 
regardless of whose compiler you are talking about. Errors of omission are 
extremely difficult to detect.)

You can't really know if you've used some feature that isn't supposed to be 
legal until you've at least tried the code on other compilers. You also 
can't easily see if you've unintentionally used compiler-specific stuff. 
Most of the GNAT libraries I've looked at are full of 'Img and 
'Unrestricted_Access and similar non-Ada things.
(3) I personally only care about things that will compile with Janus/Ada 
(90% of what I write starts there), and it is (intentionally) weird enough 
that nothing much will work. For instance, Integer is 16-bit on Janus/Ada, 
and that seems to break about 100% of outside code I try on it.

                                                 Randy.