On 07/12/2014 00:28, John Cowan wrote:
> I've modified the code so that rather than calling `error` to signal an
> empty list queue, it calls `raise`, passing a unique object.  This can
> be checked using `empty-list-queue-error?` on the object when it is caught.
This may be out of R7RS/this SRFI but isn't it better to mention that
this error object may or may not satisfy `error-object?` or something
like that? (Preferably should satisfy but I believe it's impossible in
sense of R7RS.)

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_/_/
Takashi Kato
E-mail: xxxxxx@ymail.com