From: Stefano Zacchiroli <zack@upsilon.cc>
Date: Mon, 16 Feb 2004 09:44:14 +0000 (+0000)
Subject: solved a precedence issue between binders and arrows
X-Git-Tag: v0_0_4~196
X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=commitdiff_plain;h=01b7b3b642833e1421da21741729e643e08e6f76;p=helm.git

solved a precedence issue between binders and arrows
---

diff --git a/helm/ocaml/cic_disambiguation/cicTextualParser2.ml b/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
index 0ac43a11e..793d95e02 100644
--- a/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
+++ b/helm/ocaml/cic_disambiguation/cicTextualParser2.ml
@@ -64,10 +64,15 @@ EXTEND
   ];
   binder: [
     [ SYMBOL <:unicode<lambda>> (* λ *) -> `Lambda
-    | SYMBOL <:unicode<pi>> (* π *) -> `Pi
+    | SYMBOL <:unicode<Pi>>     (* Π *) -> `Pi
     | SYMBOL <:unicode<exists>> (* ∃ *) -> `Exists
-    | SYMBOL <:unicode<forall>> (* ∀ *) -> `Forall
-    ]
+    | SYMBOL <:unicode<forall>> (* ∀ *) -> `Forall ]
+  ];
+  sort: [
+    [ "Prop" -> `Prop
+    | "Set" -> `Set
+    | "Type" -> `Type
+    | "CProp" -> `CProp ]
   ];
   typed_name: [
     [ PAREN "("; i = IDENT; SYMBOL ":"; typ = term; PAREN ")" ->
@@ -100,14 +105,9 @@ EXTEND
         (head, vars)
     ]
   ];
-  term0: [ [ t = term -> return_term loc t ] ];
+  term0: [ [ t = term; EOI -> return_term loc t ] ];
   term:
-    [ "arrow" RIGHTA
-      [ t1 = term; SYMBOL <:unicode<to>>; t2 = term ->
-          return_term loc
-            (CicAst.Binder (`Pi, (Cic.Anonymous, Some t1), t2))
-      ]
-    | "binder" RIGHTA
+    [ "binder" RIGHTA
       [
         b = binder;
         (vars, typ) =
@@ -125,6 +125,9 @@ EXTEND
               vars body
           in
           return_term loc binder
+      | t1 = term; SYMBOL <:unicode<to>> (* → *); t2 = term ->
+            return_term loc
+              (CicAst.Binder (`Pi, (Cic.Anonymous, Some t1), t2))
       ]
     | "eq" LEFTA
       [ t1 = term; SYMBOL "="; t2 = term ->
@@ -134,11 +137,7 @@ EXTEND
     | "mult" LEFTA    [ (* nothing here by default *) ]
     | "inv" NONA      [ (* nothing here by default *) ]
     | "simple" NONA
-      [
-        sort_kind = [
-          "Prop" -> `Prop | "Set" -> `Set | "Type" -> `Type | "CProp" -> `CProp
-        ] ->
-          CicAst.Sort sort_kind
+      [ sort = sort -> CicAst.Sort sort
       | n = substituted_name -> return_term loc n
       | PAREN "("; head = term; args = LIST1 term; PAREN ")" ->
           return_term loc (CicAst.Appl (head :: args))
diff --git a/helm/ocaml/cic_disambiguation/cicTextualParser2.mli b/helm/ocaml/cic_disambiguation/cicTextualParser2.mli
index aec7c8f1d..7e0625cc3 100644
--- a/helm/ocaml/cic_disambiguation/cicTextualParser2.mli
+++ b/helm/ocaml/cic_disambiguation/cicTextualParser2.mli
@@ -31,8 +31,8 @@ val parse_term: char Stream.t -> CicAst.term
 
 (** {2 Grammar extensions} *)
 
-val term: CicAst.term Grammar.Entry.e (** recursive rule *)
-val term0: CicAst.term Grammar.Entry.e (** top level rule *)
+val term: CicAst.term Grammar.Entry.e   (** recursive rule *)
+val term0: CicAst.term Grammar.Entry.e  (** top level rule *)
 
 val return_term: CicAst.location -> CicAst.term -> CicAst.term