[r6rs-discuss] [Formal] "#! /usr/bin/env" is not "portable." It's Unix-specific.

From: Anton van Straaten <anton>
Date: Wed Nov 15 10:16:06 2006

Jens Axel S?gaard wrote:
> I am not sure, but I think some Scheme implementations use the
> syntax #!name for other stuff (keywords, optionals? - I
> can't remember exactly)

A number of implementations use #!optional to indicate optionals. Other
such keywords that can be found in various Schemes include #!rest,
#!eof, #!void, and #!null.

R5.91RS codifies this practice: see section 3, page 10, second last
paragraph before 3.1, as well as 3.2.2.

Anton
Received on Wed Nov 15 2006 - 10:16:46 UTC