Re: Ada syntax questions

[AdaMagica <christ-usch.grein@t-online.de>]

Randy Brukardt schrieb am Dienstag, 22. Dezember 2020 um 02:04:46 UTC+1:
> "Keith Thompson" <Keith.S.T...@gmail.com> wrote in message 
> news:87r1nkb...@nosuchdomain.example.com... 
> ...
> > Function calls and array indexing can be substituted for one another 
> > in *some* circumstances, but not it all. But they really are very 
> > different things. A function call executes user-written code, 
> > and may have side effects; an array indexing expression refers to 
> > an object. An array indexing expression can appear on the LHS of 
> > an assignment; a function call can't.
> This is false in modern languages with user-defined indexing (Ada and C++ 
> included), since what looks like array indexing can actually be implemented 
> with a function call. 

See http://www-staging.eu.adacore.com/adaanswers/gems/gem-123-implicit-dereferencing-in-ada-2012/

Here the LHS is a function call, looking like container Cont is indexed as an array:
Cont (My_Key) := Some_Element_Value;