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Document modal encodings problem in ref doc

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* doc/ref/api-io.texi (Ports): note that modal encodings are not
  supported
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Michael Gran 2010-01-19 08:42:44 -08:00
parent adfb428466
commit 912a870246
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6
doc/ref/api-io.texi
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@ -76,6 +76,12 @@ how characters and strings written to the port are converted to bytes.
When ports are created, they inherit their character encoding from the
current locale, but, that can be modified after the port is created.
Currently, the ports only work with @emph{non-modal} encodings. Most
encodings are non-modal, meaning that the conversion of bytes to a
string doesn't depend on its context: the same byte sequence will always
return the same string. A couple of modal encodings are in common use,
like ISO-2022-JP and ISO-2022-KR, and they are not yet supported.
Each port also has an associated conversion strategy: what to do when
a Guile character can't be converted to the port's encoded character
representation for output. There are three possible strategies: to