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Re: regexp and valid-sre?

This page is part of the web mail archives of SRFI 115 from before July 7th, 2015. The new archives for SRFI 115 contain all messages, not just those from before July 7th, 2015.

> An <sre> is not a data type. It is a language. This is like having
> 'valid-syntax?' to check an expression before you call 'eval' with it.

On this point, actually the SRE Syntax section of the SRFI draft states

"Note that an SRE is a first-class object consisting of nested lists of
strings, chars, char-sets, symbols and numbers. Where the syntax is
described as (foo bar), this can be constructed equivalently as '(foo
bar) or (list 'foo 'bar), etc."

Kevin Wortman