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Newsgroups: comp.lang.lisp
From: Hidekazu IWAKI <i.hidek...@gmail.com>
Date: Fri, 28 Sep 2012 18:33:22 -0700 (PDT)
Local: Fri, Sep 28 2012 9:33 pm
Subject: Re: 【R5RS scheme】C-lang like loop macros
OK. you're right
But my plan is how to write programs in functional languages for imperative programmers.
In addition, if my macros expand, then they look non-imperative. They are essentially functional.
2012年9月28日金曜日 0時34分18秒 UTC+9 Kaz Kylheku:
> On 2012-09-27, Hidekazu IWAKI <i.hidek...@gmail.com> wrote:
> > Hi! I made C-lang like macros, "for" and "while" with break statement.
> Hi, we already have a standard loop macro in Lisp which does all
> that and more.
> (loop for x = 0 then (1+ x)
> while (< x 10) do
> (print x)
> if (= x 5) do > (return 42))
> Output:
> 0
> 1
> 2
> 3
> 4
> 5
> Result: > 42
> > They are not unloved in popular functional programming culture. But if your
> For loops are absolutely reviled in functional programming culture.
> > friends take an interested in functional programming languages, you will be
> > able to recommend this macros as an introduction.
> Unfortunately, this is wrongheaded because iteration with loops and increment
> variables has no place in functional functional programming: it is imperative
> programming.
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