[R6RS] Scripts

[Michael Sperber]

The relevant SRFI is #22:

http://srfi.schemers.org/srfi-22/srfi-22.html

In light of what we've been discussing, I suggest the following
variant of it:

<script> --> <script prelude> <library form>
<script prelude> --> #!/usr/bin/env scheme <line break> #!r6rs

(#!/usr/bin/env should probably also read as a comment, like#!r6rs.)

The library defined by <library form> would have to define a library
with a fixed name, like (r6rs script), which has to export a procedure
called `main' as in SRFI 22.

I realize that #!/usr/bin/env is a bit of a hack, but without it, we
don't get much of the benefit we want.

-- 
Cheers =8-} Mike
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