CODEWITHSUNDEEP
racketr5rsgambit
Erik Vesteraas
Erik Vesteraas

Reputation: 4735

Portable load/include of define-syntax in R5RS Scheme?

I'm trying to write something that works in both DrRacket/plt-r5rs and Gambit/gsi.

The problem I'm having is that (load "foo.scm") in Gambit does not load define-syntax-blocks. Using (include "foo.scm") in Gambit works, but of course results in a syntax error in DrRacket.

Is there any way to solve this so that I can write portable R5RS code?

Things I've tried:

Upvotes: 3

Views: 716

Answers (2)

soegaard
soegaard

Reputation: 31147

In case it helps: In Racket you can use include in r5rs files:

#lang r5rs
(#%require (only racket include))
(include "foo.scm")

If you define #%require to do nothing in Gambit, then you can use the same source file in both implementations.

Upvotes: 3

C. K. Young
C. K. Young

Reputation: 223003

It's very hard to write a module that's compatible with both Gambit and Racket.

There are indeed ways you can test for a specific implementation and define things conditionally. There are, in fact, two systems for doing this: SRFI 0 and SRFI 7. Most implementations support one or the other. Not very many support both.

Gambit supports SRFI 0. Racket supports SRFI 7.

Upvotes: 2

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