Bitshift

evaluator/evaluator.go

@@ -434,6 +434,10 @@ func evalIntegerInfixExpression(operator string, left, right object.Object) obje
 		return &object.Integer{Value: leftVal ^ rightVal}
 	case "&":
 		return &object.Integer{Value: leftVal & rightVal}
+	case "<<":
+		return &object.Integer{Value: leftVal << uint64(rightVal)}
+	case ">>":
+		return &object.Integer{Value: leftVal >> uint64(rightVal)}
 	case "<":
 		return nativeBoolToBooleanObject(leftVal < rightVal)
 	case "<=":

evaluator/evaluator_test.go

@@ -38,6 +38,8 @@ func TestEvalExpressions(t *testing.T) {
 		{"3 & 6", 2},
 		{`" " * 4`, "    "},
 		{`4 * " "`, "    "},
+		{"1 << 2", 4},
+		{"4 >> 2", 1},
 	}
 
 	for _, tt := range tests {