== SRFI 38: I/O for data with shared structure

This egg provides forms for reading and writing data containing
shared structure.  By using these forms, circular lists and similar
data can be printed and read reliably, something that is impossible
in vanilla CHICKEN.

In addition to the SRFI forms, this egg also provides REPL support
for shared structure I/O via the {{make-repl-support-shared-structure}}
procedure.

[[toc:]]

== SRFI Description

This page is intended to document the forms exported by this egg.  For
a full description of SRFI 38, see the
[[https://srfi.schemers.org/srfi-38/srfi-38.html|SRFI document]].

=== Documentation

See [[http://srfi.schemers.org/srfi-38/srfi-38.html|SRFI-38 document]].

This implementation extends '''write-with-shared-structure''' to accept
the optional keyword parameter '''#:ignore-strings''', which is true
will treat strings as normal (nonshared) objects even if repeated.

The utility `make-repl-support-shared-structure' is also provided to
support printing results at the REPL with shared structure.

=== Changelog

; 0.10 : Add CHICKEN 6 support.
; 0.9 : Fixed [[https://github.com/diamond-lizard/srfi-38/issues/2|issue 2]]
; 0.8 : Registered {{srfi-38}} feature.
; 0.7 : Removed extra, incorrect "license" clause from egg.
; 0.6 : Ported to CHICKEN 5.
; 0.4 : Small bugfixes, re-introducing the ignore-strings: parameter, supporting {{#true}} and {{#false}}.
; 0.3 : ...
; 0.2 : ...
; 0.1 : Rewrite from scratch by Alex Shinn.

== About this egg

=== Authors

SRFI 38 was created by Ray Dillinger.

The implementation used in this egg is by
[[/users/alex-shinn|Alex Shinn]].

Originally ported to CHICKEN 5 by Sergey Goldgaber.

=== Maintainer

Wolfgang Corcoran-Mathe

Contact: {{wcm at sigwinch dot xyzzy minus the zy}}

=== Repository

[[https://github.com/Zipheir/srfi-38|GitHub]]

=== License

This code was written by Alex Shinn in 2009 and dedicated to the
public domain.  All warranties are disclaimed.