[Openmcl-devel] stream-external-encoding: mythical beast?

Gary Byers gb at clozure.com
Mon Oct 11 14:15:10 UTC 2010


The documentation's wrong; the standard CL function to access the 
external-format of a file-stream is CL:STREAM-EXTERNAL-FORMAT.

In CCL, it's possible to use STREAM-EXTERNAL-FORMAT on streams that
aren't FILE-STREAMs, and to use SETF with STREAM-EXTERNAL-FORMAT on
open streams that were created by functions that accept an
:external-format argument.  I think that the documentation's probably
trying to document these extensions (it should), but of course that's
just a guess ...

On Sun, 10 Oct 2010, Kaz Kylheku wrote:

>
> Documentation says:
>
> 9.1.1. Stream External Encoding
>
> Clozure CL streams have an external-encoding attribute that may be
> read using STREAM-EXTERNAL-ENCODING and set using (SETF 
> STREAM-EXTERNAL-ENCODING).
>
> I'm using 1.5-r13651 on Linux, 32 bit. There are no such functions.
>
> $ lx86cl
> Welcome to Clozure Common Lisp Version 1.5-r13651  (LinuxX8632)!
> ? (apropos "STREAM-EXTERNAL-ENCODING")
> ? (describe 'stream-external-encoding)
> STREAM-EXTERNAL-ENCODING
> Type: SYMBOL
> Class: #<BUILT-IN-CLASS SYMBOL>
> INTERNAL in package: #<Package "COMMON-LISP-USER">
> Print name: "STREAM-EXTERNAL-ENCODING"
> Value: #<Unbound>
> Function: #<Unbound>
> Plist: NIL
> ? (stream-external-encoding *standard-output*)
>> Error: Undefined function STREAM-EXTERNAL-ENCODING called with arguments 
>> (#<SYNONYM-STREAM to *TERMINAL-IO* #x182AC466>) .
>
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