Notations: Adding modifiers to tell which kind of binder a constr can parse.

Concretely, we provide "constr as ident", "constr as strict pattern"
and "constr as pattern".

This tells to parse a binder as a constr, restricting to only ident or
to only a strict pattern, or to a pattern which can also be an ident.

The "strict pattern" modifier allows to restrict the use of patterns
in printing rules. This allows e.g. to select the appropriate rule for
printing between {x|P} and {'pat|P}.

1 files changed, 3 insertions, 1 deletions

diff --git a/CHANGES b/CHANGES
index 74e120a31..32a533d14 100644
--- a/CHANGES
+++ b/CHANGES
@@ -12,7 +12,9 @@ Notations
   opened rather than to the latest notations defined independently of
   whether they are in an opened scope or not.
 - Notations can now refer to the syntactic category of patterns (as in
-  "fun 'pat =>" or "match p with pat => ... end").
+  "fun 'pat =>" or "match p with pat => ... end"). Two variants are
+  available, depending on whether a single variable is considered as a
+  pattern or not.
 - Recursive notations now support ".." patterns with several
   occurrences of the recursive term or binder, possibly mixing terms
   and binders, possibly in reverse left-to-right order.