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

…uality

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 {