Re: In a Pascal-like language, would being able to declare a subroutine as "purely functional" be of any value?

1Z <pdjpurchase@googlemail.com>
Fri, 11 Mar 2011 16:49:30 -0800 (PST)

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In a Pascal-like language, would being able to declare a subroutine as noitalmost@cox.net (noitalmost) (2011-03-11)
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From: 1Z <pdjpurchase@googlemail.com>
Newsgroups: comp.compilers
Date: Fri, 11 Mar 2011 16:49:30 -0800 (PST)
Organization: Compilers Central
References: 11-03-032
Keywords: syntax, optimize
Posted-Date: 11 Mar 2011 19:55:46 EST

On Mar 11, 7:15 pm, noitalmost <noitalm...@cox.net> wrote:
> I was thinking of something like:
> pure function foo(x,y : int) int
> begin
> ...
> end;
>
> Then foo isn't allowed to modify its parameters or to reference
> (except possibly through a parameter) or modify any non-local
> variables. ...


This has been added as a non standard extension to C in gcc, so it is
doable. I think it is useful, since you don't have to use it if your
don't want to.



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