Merge pull request #5657 from poorna2152/binding_patterns

Update binding patterns BBEs

examples/list-binding-pattern-in-match-statement/list_binding_pattern_in_match_statement.bal

@@ -5,9 +5,14 @@ function matchCommand(any commands) {
         var [show] => {
             io:println(show);
         }
+        // The list binding pattern below binds lists that contain three list items
+        // where the third element in the list is the boolean value `true`.
+        var [remove, all, isDir] if isDir is true => {
+            io:println(remove, " directories ", all);
+        }
         // The list binding pattern below binds lists that contain three list items.
         var [remove, all, _] => {
-            io:println(remove, " ", all);
+            io:println(remove, " files ", all);
         }
         // The list binding pattern below binds lists that contain two list items,
         // in which the second list item is also a list of two items.
@@ -20,9 +25,11 @@ function matchCommand(any commands) {
     }
 }
 
+
 public function main() {
     matchCommand(["Show"]);
     matchCommand(["Remove", "*", true]);
+    matchCommand(["Remove", "f.txt", false]);
     matchCommand(["Copy", ["a.bal", "b.bal"]]);
     matchCommand(1);
 }

examples/list-binding-pattern-in-match-statement/list_binding_pattern_in_match_statement.out

@@ -1,5 +1,6 @@
 $ bal run list_binding_pattern_in_match_statement.bal
 Show
-Remove *
+Remove directories *
+Remove files f.txt
 Copy a.bal into b.bal
 Unrecognized command.

examples/mapping-binding-pattern-in-match-statement/mapping_binding_pattern_in_match_statement.bal

@@ -43,11 +43,30 @@ function matchTime3(Day day) {
     }
 }
 
+function matchTime4(Time time) {
+    match time {
+        // The binding pattern below has a rest binding pattern to capture the additional 
+        // fields that may be specified in the open record value assigned to the `time` variable.
+        // The condition here checks whether the open record has the field `meridiem`.
+        var {hours, minutes, ...rest}
+                if rest["meridiem"] !is () && rest["meridiem"] == "PM" => {
+            io:println(hours + 12, ", ", minutes);
+        }
+        _ => {
+            io:println(time.hours, ", ", time.minutes);
+        }
+    }
+}
+
 public function main() {
     Time time = {hours: 3, minutes: 20, "seconds": 40, "milli-seconds": 500};
     matchTime1(time);
     matchTime2(time);
 
     Day day = {t: time};
     matchTime3(day);
+
+    Time time2 = {hours: 11, minutes: 21, "seconds": 52, "meridiem": "PM"};
+    matchTime4(time2);
+    matchTime4(time);
 }

examples/mapping-binding-pattern-in-match-statement/mapping_binding_pattern_in_match_statement.out

@@ -2,3 +2,5 @@ $ bal run mapping_binding_pattern_in_match_statement.bal
 3, 20
 3, 20, {"seconds":40,"milli-seconds":500}
 3, 20
+23, 21
+3, 20