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Feature/improvements #84

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Jan 7, 2024
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Original file line number Diff line number Diff line change
Expand Up @@ -16,7 +16,7 @@ final class CalculatorOperationHadler: CalculatorOperationHandlerProtocol {

// MARK: - Stored properties

private var pendingBinaryOperation: PendingBinaryOperation?
private var pendingBinaryOperation: PendingBinaryOperationProtocol?
private var isEnteringNumbers: Bool = false
private var storedCalculatorDisplay: String = "" {
didSet {
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Original file line number Diff line number Diff line change
Expand Up @@ -6,7 +6,14 @@
// Copyright © 2020 Alonso. All rights reserved.
//

final class PendingBinaryOperation {
protocol PendingBinaryOperationProtocol {
var hasOperand: Bool { get }

func setOperand(_ secondOperand: Double)
func perform() -> Double
}

final class PendingBinaryOperation: PendingBinaryOperationProtocol {
private let function: (Double, Double) -> Double
private var accumulatedValue: Double
private var operand: Double? = nil
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