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[bpt/guile.git] / NEWS

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@@ -195,6 +195,21 @@ 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.
+
 ** The concept of dynamic roots has been factored into continuation
    barriers and dynamic states.
 
@@ -320,6 +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
@@ -707,6 +741,22 @@ Use symbol->keyword and keyword->symbol instead.
 
 * Changes to the C interface
 
+** The functions scm_hash_fn_remove_x and scm_hashx_remove_x no longer
+   take a 'delete' function argument.
+
+This argument makes no sense since the delete function is used to
+remove a pair from an alist, and this must not be configurable.
+
+This is an incompatible change.
+
+** The GH interface is now subject to the deprecation mechanism
+
+The GH interface has been deprecated for quite some time but now it is
+actually removed from Guile when it is configured with
+--disable-deprecated.
+
+See the manual "Transitioning away from GH" for more information.
+
 ** A new family of functions for converting between C values and
    Scheme values has been added.