0197902309
Macros and other tools that need syntax privilege used `(current-code-inspector)' at the module top-level to try to capture the right code inspector at load time. It's more consistent to instead use the enclosing module's declaration-time inspector, and `var-ref->mod-decl-insp' provides that. The new function works only on references to anonymous variables, which limits access to the inspector. The real function name is longer, of course.
31 lines
879 B
Racket
31 lines
879 B
Racket
#lang scheme/base
|
|
|
|
(provide define-require-syntax)
|
|
|
|
(require (for-syntax racket/base
|
|
"require-transform.rkt"))
|
|
|
|
(define-for-syntax orig-insp (variable-reference->module-declaration-inspector
|
|
(#%variable-reference)))
|
|
|
|
(define-for-syntax (make-require-macro proc)
|
|
(make-require-transformer
|
|
(lambda (stx)
|
|
(let* ([i (make-syntax-introducer)]
|
|
[d-stx (syntax-disarm stx orig-insp)]
|
|
[new-stx (i (proc (i d-stx)))])
|
|
(expand-import (syntax-rearm new-stx stx))))))
|
|
|
|
(define-syntax (define-require-syntax stx)
|
|
(syntax-case stx ()
|
|
[(_ id proc)
|
|
(identifier? #'id)
|
|
(syntax/loc stx
|
|
(define-syntax id
|
|
(make-require-macro proc)))]
|
|
[(_ (id . args) . body)
|
|
(identifier? #'id)
|
|
(syntax/loc stx
|
|
(define-require-syntax id
|
|
(lambda args . body)))]))
|