*** empty log message ***

[bpt/guile.git] / NEWS

diff --git a/NEWS b/NEWS
index e762aa2..8e6af0e 100644 (file)
--- a/NEWS
+++ b/NEWS
@@ -195,6 +195,17 @@ be used with '-e'.  For example, you can now write a script like
 
 * Changes to Scheme functions and syntax
 
+** Guardians have changed back to their original semantics
+
+Guardians now behave like described in the paper by Dybvig et al.  In
+particular, they no longer make guarantees about the order in which
+they return objects, and they can no longer be greedy.
+
+They no longer drop cyclic data structures.
+
+The C function scm_make_guardian has been changed incompatibly and no
+longer takes the 'greedy_p' argument.
+
 ** New function hashx-remove!
 
 This function completes the set of 'hashx' functions.
@@ -324,6 +335,25 @@ Now:
     guile> #: foo
     #:foo
 
+** The printing of symbols that might look like keywords can be
+   controlled.
+
+The new printer option 'quote-keywordish-symbols' controls how symbols
+are printed that have a colon as their first or last character.  The
+default now is to only quote a symbol with #{...}# when the read
+option 'keywords' is not '#f'.  Thus:
+
+    guile> (define foo (string->symbol ":foo"))
+    guile> (read-set! keywords #f)
+    guile> foo
+    :foo
+    guile> (read-set! keywords 'prefix)
+    guile> foo
+    #{:foo}#
+    guile> (print-set! quote-keywordish-symbols #f)
+    guile> foo
+    :foo
+
 ** 'while' now provides 'break' and 'continue'
 
 break and continue were previously bound in a while loop, but not