Node:SRFI-10, Next:SRFI-11, Previous:SRFI-9, Up:SRFI Support
(srfi srfi-10) implements the syntax extension
#,(), also called hash-comma, which is defined in SRFI-10.
The support for SRFI-10 consists of the procedure
define-reader-ctor for defining new reader constructors and the
read syntax form
#,(ctor datum ...)
where ctor must be a symbol for which a read constructor was
defined previously, using
(define-reader-ctor 'file open-input-file) (define f '#,(file "/etc/passwd")) (read-line f) => "root:x:0:0:root:/root:/bin/bash"
Please note the quote before the
#,(file ...) expression. This
is necessary because ports are not self-evaluating in Guile.
|define-reader-ctor symbol proc||Scheme Procedure|
|Define proc as the reader constructor for hash-comma forms with a tag symbol. proc will be applied to the datum(s) following the tag in the hash-comma expression after the complete form has been read in. The result of proc is returned by the Scheme reader.|