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Re: Error objects in general

This page is part of the web mail archives of SRFI 77 from before July 7th, 2015. The new archives for SRFI 77 contain all messages, not just those from before July 7th, 2015.

bear wrote:

With (read) capable of executing arbitrary code via quote,
etc. it is entirely possible for (read) to encounter an
error.  I want to know whether an error returned from (read)
is one that was written and read, or one that prevented
correct reading from occurring.

How is this different from expecting to read a list and getting #f instead, and not being sure if the #f appeared as a literal in the input stream or was generated by code called by the reader?

Do you want two different kinds of #f? Those that are generated and those that are read?


Dr Alan Watson
Centro de Radioastronomía y Astrofísica
Universidad Astronómico Nacional de México