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#lang racket/base
(require (for-syntax racket/base
syntax/parse))
(provide display-commented
with-dynamic-requires
string->namespace-syntax
syntax-or-sexpr->syntax
syntax-or-sexpr->sexpr
nat/c
pos/c)
(define (display-commented str)
(eprintf "; ~a\n"
(regexp-replace* "\n" str "\n; ")))
(define-syntax (with-dynamic-requires stx)
(syntax-parse stx
[(_ ([lib:id id:id] ...+) body:expr ...+)
#'(let ([id (dynamic-require 'lib 'id)] ...)
body ...)]))
(define (string->namespace-syntax str)
(namespace-syntax-introduce
(read-syntax #f (open-input-string str))))
(define (syntax-or-sexpr->syntax v)
(if (syntax? v)
v
(namespace-syntax-introduce (datum->syntax #f v))))
(define (syntax-or-sexpr->sexpr v)
(if (syntax? v)
(syntax-e v)
v))
(define nat/c exact-nonnegative-integer?)
(define pos/c exact-positive-integer?)
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