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bug#14109: No code for 'bytevector->string' and 'string->bytevector'

From: Ian Price
Subject: bug#14109: No code for 'bytevector->string' and 'string->bytevector'
Date: Mon, 01 Apr 2013 12:46:59 +0100
User-agent: Gnus/5.13 (Gnus v5.13) Emacs/23.3 (gnu/linux)

Nikita Karetnikov <address@hidden> writes:

> The mentioned functions are documented [1].  However, I'll get the
> "Unbound variable" error if I try to import them:
> scheme@(guile-user)> ,use (rnrs io ports) 
> scheme@(guile-user)> string->bytevector
> ;;; <unknown-location>: warning: possibly unbound variable 
> `string->bytevector'
> ERROR: In procedure #<procedure 8ab8bc0 ()>:
> ERROR: In procedure module-lookup: Unbound variable: string->bytevector

Even if they were available, it wouldn't do you much good, because the
general transcoder functionality on ports isn't implemented.

scheme@(guile−user)> (open-bytevector-input-port
                       (string->utf8 "foobarbaz")
                       (make-transcoder (utf-8-codec)))
GNU Guile: warning: transcoders not implemented
$5 = #<input: r6rs−bytevector−input−port ae46b40>

Maybe we could stub these, since they are mentioned in the info file[0],
and warn about them not being implemented like we do e.g. with

For the moment, the (rnrs bytevectors) module has string->utf8,
string->utf16, and string->utf32 which are implemented. Though, this
doesn't let you specify eol-style or handling-mode.

0. This documentation is lifted straight from the R6RS (modulo
Ian Price -- shift-reset.com

"Programming is like pinball. The reward for doing it well is
the opportunity to do it again" - from "The Wizardy Compiled"

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