1 files changed, 24 insertions, 0 deletions
diff --git a/src/packrat-errors.adb b/src/packrat-errors.adb
index 3f7c38f..0122b7d 100644
--- a/src/packrat-errors.adb
+++ b/src/packrat-errors.adb
@@ -313,6 +313,30 @@ package body Packrat.Errors is
     end Decode;
 
 
+
+
+
+    function Equivalent
+           (Left, Right : in Error_Info_Array)
+        return Boolean
+    is
+        Marked : array (Left'Range) of Boolean := (others => False);
+    begin
+        if Left'Length /= Right'Length then
+            return False;
+        end if;
+        for L_Index in Left'Range loop
+            for R of Right loop
+                if Left (L_Index) = R and not Marked (L_Index) then
+                    Marked (L_Index) := True;
+                    exit;
+                end if;
+            end loop;
+        end loop;
+        return (for all M of Marked => M = True);
+    end Equivalent;
+
+
 end Packrat.Errors;