various posts: Implement assignment parsing for typeset.

Typeset assignments now work like raw assignments except
for no "+=" and no GLOB_ASSIGN.

Documented in typeset builtin doc and mentioned in release notes.

Tests to ensure basic sanity.

Enabled by default, can be turned off by "disable -r" with typeset
family of commands.

1 files changed, 17 insertions, 0 deletions

diff --git a/README b/README
index 10f29a4ed..745ee6fce 100644
--- a/README
+++ b/README
@@ -30,6 +30,23 @@ Zsh is a shell with lots of features.  For a list of some of these, see the
 file FEATURES, and for the latest changes see NEWS.  For more
 details, see the documentation.
 
+Incompatibilites between 5.0.8 and 5.0.9
+----------------------------------------
+
+As noted in NEWS, the builtins declare, export, float, integer, local,
+readonly and typeset now have corresponding reserved words that provide
+true assignment semantics instead of an approximation by means of normal
+command line arguments.  It is hoped that this additional consistency
+provides a more natural interface.  However, compatbility with older
+versions of zsh can be obtained by turning off the reserved word
+interface, exposing the builtin interface:
+
+  disable -r declare export float integer local readonly typeset
+
+This is also necessary in the unusual eventuality that the builtins are
+to be overridden by shell functions, since reserved words take
+precedence over functions.
+
 Incompatibilites between 5.0.7 and 5.0.8
 ----------------------------------------