CODEWITHSUNDEEP
importmoduleschemegauche
shadowtalker
shadowtalker

Reputation: 13893

Gauche "unknown module" using `import` with a built-in module

I am attempting to follow the Gauche manual to write a simple toy script, but I am struggling with the Gauche import mechanism.

Here is my script, random-team-member:

#!/usr/bin/env gosh

(import (data.random :only (samples$)))

(define team-members
  (list "billy"
        "nilly"
        "silly"
        "willy"))

(define (generator->first gen)
  (car (generator->list gen 1)))

(define (sample1 items)
  (generator->first (samples$ items)))

(define (main args)
  (print (sample1 team-members)))

But I get the error ERROR: unknown module data.random.

As far as I could tell from the docs (here and here), this is the correct syntax for import, and data.random is indeed the name of the module.

I also tried defining a Gauche module, thinking that maybe import only worked inside a define-module definition, but that didn't change the error:

(define-module random-team-member
  (import (data.random :only (samples$))))

(select-module random-team-member)

; ... the rest of my code ...

I am using Gauche 0.9.12, installed on MacOS (ARM64) using Homebrew.

Upvotes: 0

Views: 60

Answers (1)

Shawn
Shawn

Reputation: 52529

You can use R7RS style import:

(import (only (data random) samples$))

which puts Gauche into R7RS user mode as a side-effect. To remain in Gauche user mode and use its style of import, first you have to require the file that defines the module:

(require "data/random")
(import (data.random :only (samples$)))

but it's often simpler to use use, which requires the file for you based on the module name:

(use data.random :only (samples$))

Upvotes: 1

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