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added example of making an evaluator for interaction

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Danny Yoo 2011-06-15 15:34:39 -04:00 committed by Vincent St-Amour
parent a919062143
commit e35e005a1c
1 changed files with 18 additions and 0 deletions
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18
collects/scribblings/scribble/eval.scrbl
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@ -25,6 +25,24 @@ set to @racket['string]. If @racket[eval] is not provided, an
evaluator is created using @racket[make-base-eval]. See also evaluator is created using @racket[make-base-eval]. See also
@racket[make-eval-factory]. @racket[make-eval-factory].
As an example,
@codeblock|{
#lang scribble/manual
@(require racket/sandbox
scribble/eval)
@(define my-evaluator
(parameterize ([sandbox-output 'string]
[sandbox-error-output 'string])
(make-evaluator 'typed/racket/base)))
@interaction[#:eval my-evaluator
(: my-sqr (Real -> Real))
(define (my-sqr x)
(* x x))
(my-sqr 42)]
}|
uses an evaluator whose language is @racketmodname[typed/racket/base].
If the value of @racket[current-print] in the sandbox is changed from If the value of @racket[current-print] in the sandbox is changed from
its default value, or if @racket[print-as-expression] in the sandbox its default value, or if @racket[print-as-expression] in the sandbox
is set to @racket[#f], then each evaluation result is formatted to a is set to @racket[#f], then each evaluation result is formatted to a