Re: [Chicken-users] SRFI-42 and Importing in Chicken 4

[Peter Bex]

On Mon, Dec 15, 2008 at 04:03:01PM -0600, Jack Trades wrote:
> I just got Chicken 4 compiled and am having some problems with importing.
> 
> #;1> (import srfi-1)
> ; loading /usr/local/lib/chicken/4/srfi-1.import.so ...
> #;2> (take '(1 2 3) 2)
> Error: unbound variable: take
> 
> The docs say "Importing a module does not load or link it - this is a
> separate operation from importing its bindings."  How do I load it?
> (require-extension srfi-1) works but I would like to prefix the names from
> srfi-1.

You can just load the library with the form (require-library srfi-1)
After doing so you can use import on the module defined by the library.

> BTW would this be correct, (import srfi-1 (prefix srfi-1
> "list-funcs."))?

Not quite. (import (prefix srfi-1 list-funcs.)) would do the trick.
Then you can use  (list-funcs.take '(1 2 3) 2)

> I also get this when trying to import or install srfi-42.  Does
> chicken-setup work with Chicken 4?

It does. You'll need to load the library first here as well.

> Also, I'm trying to build a DSL for an evolutionary programming system, is
> there a way to prefix all Scheme symbols and modules?  I would like
> something similar to s.car, s.list, s.+, etc.  Can that be done in the
> REPL?  It seems to import at least basic scheme by default.

When you define a new module, you _have_ to import the SCHEME and
CHICKEN modules explicitly. While doing so, you can use the prefix
trick I described a few paragraphs back.

Cheers,
Peter
-- 
http://sjamaan.ath.cx
--
"The process of preparing programs for a digital computer
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