Slight better support for equality comparisons

Author: Marco De Salvo

RDFSharp/Query/Mirella/Algebra/Abstractions/RDFPatternGroupMember.cs

@@ -68,7 +68,19 @@ public override string ToString()
         /// Performs the equality comparison between two pattern group members
         /// </summary>
         public bool Equals(RDFPatternGroupMember other)
-            => other != null && PatternGroupMemberID.Equals(other.PatternGroupMemberID);
+            => other != null && PatternGroupMemberID == other.PatternGroupMemberID;
+
+        /// <summary>
+        /// Performs the equality comparison between two pattern group members
+        /// </summary>
+        public override bool Equals(object other)
+            => other is RDFPatternGroupMember pgm && PatternGroupMemberID == pgm.PatternGroupMemberID;
+
+        /// <summary>
+        /// Calculates the hashcode of this pattern group member
+        /// </summary>
+        public override int GetHashCode()
+            => PatternGroupMemberID.GetHashCode();
         #endregion
     }
 }

RDFSharp/Query/Mirella/Algebra/Abstractions/RDFPatternMember.cs

@@ -48,7 +48,19 @@ public override string ToString()
         /// Performs the equality comparison between two pattern members
         /// </summary>
         public bool Equals(RDFPatternMember other)
-            => other != null && PatternMemberID.Equals(other.PatternMemberID);
+            => other != null && PatternMemberID == other.PatternMemberID;
+
+        /// <summary>
+        /// Performs the equality comparison between two pattern members
+        /// </summary>
+        public override bool Equals(object other)
+            => other is RDFPatternMember pm && PatternMemberID == pm.PatternMemberID;
+
+        /// <summary>
+        /// Calculates the hashcode of this pattern member
+        /// </summary>
+        public override int GetHashCode()
+            => PatternMemberID.GetHashCode();
         #endregion
 
         #region Ctors

RDFSharp/Query/Mirella/Algebra/Abstractions/RDFQueryMember.cs

@@ -68,7 +68,19 @@ public override string ToString()
         /// Performs the equality comparison between two query members
         /// </summary>
         public bool Equals(RDFQueryMember other)
-            => other != null && QueryMemberID.Equals(other.QueryMemberID);
+            => other != null && QueryMemberID == other.QueryMemberID;
+
+        /// <summary>
+        /// Performs the equality comparison between two query members
+        /// </summary>
+        public override bool Equals(object other)
+            => other is RDFQueryMember qm && QueryMemberID == qm.QueryMemberID;
+
+        /// <summary>
+        /// Calculates the hashcode of this query member
+        /// </summary>
+        public override int GetHashCode()
+            => QueryMemberID.GetHashCode();
         #endregion
     }
 }