#57 Operands (constants and register operands) can be compared for equality

Author: dibyendumajumdar

optvm/src/main/java/com/compilerprogramming/ezlang/compiler/Operand.java

@@ -3,6 +3,8 @@
 import com.compilerprogramming.ezlang.types.Symbol;
 import com.compilerprogramming.ezlang.types.EZType;
 
+import java.util.Objects;
+
 public class Operand {
 
     EZType type;
@@ -17,6 +19,19 @@ public ConstantOperand(long value, EZType type) {
         public String toString() {
             return String.valueOf(value);
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            ConstantOperand that = (ConstantOperand) o;
+            return value == that.value;
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(value);
+        }
     }
 
     public static class NullConstantOperand extends Operand {
@@ -46,6 +61,19 @@ public RegisterOperand copy(Register register) {
         public String toString() {
             return reg.name();
         }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            RegisterOperand operand = (RegisterOperand) o;
+            return Objects.equals(reg, operand.reg);
+        }
+
+        @Override
+        public int hashCode() {
+            return Objects.hashCode(reg);
+        }
     }
 
     public static class LocalRegisterOperand extends RegisterOperand {