ac26fe7554
Also, updates some of the mzlib files to point at `racket/*' libraries rather than to `scheme/*' ones.
48 lines
1.3 KiB
Racket
48 lines
1.3 KiB
Racket
#lang scribble/manual
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@(require scribble/eval "utils.rkt"
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(for-label unstable/exn racket/contract racket/base))
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@(define the-eval (make-base-eval))
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@(the-eval '(require unstable/exn))
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@title[#:tag "exn"]{Exceptions}
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@defmodule[unstable/exn]
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@unstable-header[]
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@defproc[(network-error [s symbol?]
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[fmt string?]
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[v any/c] ...)
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void]{
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Like @racket[error], but throws a @racket[exn:fail:network].
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}
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@defproc[(exn->string [exn (or/c exn? any/c)])
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string?]{
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Formats @racket[exn] with @racket[(error-display-handler)] as a string.
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}
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@addition[@author+email["Carl Eastlund" "cce@racket-lang.org"]]
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@defform[(try expr ...+)]{
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Executes the first expression @racket[expr] in the sequence, producing its
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result value(s) if it returns any. If it raises an exception instead,
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@racket[try] continues with the next @racket[expr]. Exceptions raised by
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intermediate expressions are reported to the @tech[#:doc '(lib
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"scribblings/reference/reference.scrbl")]{current logger} at the @racket['debug]
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level before continuing. Exceptions raised by the final expression are not
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caught by @racket[try].
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@defexamples[
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#:eval the-eval
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(try (+ 1 2) (+ 3 4))
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(try (+ 'one 'two) (+ 3 4))
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(try (+ 'one 'two) (+ 'three 'four))
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]
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}
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@(close-eval the-eval)
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