[mcs] Add parser sequence for case type pattern matching

diff --git a/mcs/mcs/cs-parser.jay b/mcs/mcs/cs-parser.jay
index 64652ccfcdad7e6f15f700c97b393608e04acad9..514113a6bf7734da8fd148ae1ddfb3fcbf89ca1c 100644 (file)
--- a/mcs/mcs/cs-parser.jay
+++ b/mcs/mcs/cs-parser.jay
@@ -4547,7 +4547,7 @@ additive_expression
          }
        | additive_expression IS pattern_type_expr opt_identifier
          {
-               var is_expr = new Is ((Expression) $1, (Expression) $3, GetLocation ($2));
+               var is_expr = new Is ((Expression) $1, ((FullNamedExpression) $3), GetLocation ($2));
                if ($4 != null) {
                        if (lang_version < LanguageVersion.V_7)
                                FeatureIsNotAvailable (GetLocation ($4), "pattern matching");
@@ -6194,6 +6194,18 @@ switch_label
                lbag.AddLocation ($$, GetLocation ($3));
          }
 */
+
+       | CASE pattern_type_expr IDENTIFIER COLON
+         {
+               if (lang_version < LanguageVersion.V_7)
+                       FeatureIsNotAvailable (GetLocation ($1), "pattern matching");
+
+//             $$ = new SwitchLabel ((FullNamedExpression) $2), GetLocation ($1)) {
+//                     PatternMatching = true
+//             };
+
+               throw new NotImplementedException ("type pattern matching");
+         }
        | DEFAULT_COLON
          {
                $$ = new SwitchLabel (null, GetLocation ($1));