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From: "Alejandro R. Mosteo" <alejandro@mosteo.com>
Newsgroups: comp.lang.ada
Subject: Re: "functional" programming in Ada
Date: Tue, 6 Mar 2018 16:25:48 +0100
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Xref: reader02.eternal-september.org comp.lang.ada:50847
Date: 2018-03-06T16:25:48+01:00
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On 06/03/18 16:01, Dan'l Miller wrote:
> Alejandro R. Mosteo wrote:
>> Pros: purely recursive functions are really fun to write. If/case
>> expressions, used sparingly, do help a lot in having constant
>> declarations in local scopes. I'm writing more code in declarative parts.
> 
> Be careful or else you will be yearning to write in Ada the full-fledged meta-template programming abomination that C++ has become in the past decade and a half.  If the Ada community were to ever want to have functional programming within Ada (as opposed to, say, bolting Ada & Haskell or Ada & OCaml together better), especially compile-time functional programming in Ada, then it should be overtly well-designed to walk in the front door, not sneak in the backdoor as it did in C++ when they/Alexandrescu ‘discovered’ that C++'s templates/generics were (just barely) Turing complete with syntax-as-nearly-unreadable-subtext that is perhaps even more cryptic than infinite-length tapes in a Turing machine.
> 

There's a reason I quoted the functional in the subject ;-)

I share the feeling nonetheless, I'm no fan (to put it mildly) of C++ 
template metaprogramming,