This page is part of the web mail archives of SRFI 103 from before July 7th, 2015. The new archives for SRFI 103 contain all messages, not just those from before July 7th, 2015.
This isn't very relevant to SRFI 103, but it comes up from time to time. Derick Eddington wrote: > I thought #!identifier lexical tokens are considered comments at a level > below "syntactic datums". I, of course, meant the first thing the > standard read procedure would return. I thought calling that a "datum" > was the normal terminology. #!r6rs is the only lexical token of that form that is guaranteed to be a comment. Tokens such as #!undefined and #!eof are unlikely to be comments in implementations that support such things. In R6RS systems, whether implementation-dependent directives like #!fold-case and #!no-fold-case are comments is also implementation-dependent. In ERR5RS, those directives are datums, not comments, and apply only to the port from which they are read; if someone wants to change the case-folding mode for a port without adding a datum, one of those tokens can be preceded by a #; token. See the end of http://scheme-punks.org/wiki/index.php?title=ERR5RS:Lexical_Syntax Will