On Sat 28 Jan 2012 11:21, Mark H Weaver <m...@netris.org> writes: > The R5RS specifies that if 'char-ready?' returns #t, then the next > 'read-char' operation is guaranteed not to hang. This is not currently > the case for ports using a multibyte encoding. > > 'char-ready?' currently returns #t whenever at least one _byte_ is > available. This is not correct in general. It should return #t only if > there is a complete _character_ available.
This procedure is omitted in the R6RS because it is not a good interface. Besides its semantic difficulties, can you think of a sane implementation for multibyte characters? I suggest we document that this procedure only works correctly in encodings with 1-byte characters and recommend that people use u8-ready? instead. Andy -- http://wingolog.org/
