I have a struct:

public struct TextFormat: Equatable {

  var bold: Bool
  var italic: Bool
  var underline: Bool
  var strikethrough: Bool

  public init() {
    self.bold = false
    self.italic = false
    self.underline = false
    self.strikethrough = false
  }
}

var format: TextFormat = TextFormat()

How do I check if the value of format.bold == true or format.italic == true, basically I want to check which value in the struct is true and print only the value that's true?

CodePudding user response：

First of all the init method is not needed

To print the true values a possible solution is to add a computed property

public struct TextFormat: Equatable {
    var bold = false
    var italic = false
    var underline = false
    var strikethrough = false
    
    var status : String {
        var result = [String]()
        if bold { result.append("bold") }
        if italic { result.append("italic") }
        if underline { result.append("underline") }
        if strikethrough { result.append("strikethrough") }
        return result.joined(separator: ", ")
    }
}

Certainly there are other ways.

CodePudding user response：

You are going the wrong way what you need here is an enumeration:

enum TextFormat: String, CaseIterable, CustomStringConvertible {
    case bold, italic, underline, strikethrough
    var description: String { rawValue }
}

Now you can create a set:

let formats: Set<TextFormat> = [.bold, .italic]

print("formats:", formats)
print("all formats:", TextFormat.allCases)
print("is bold:", formats.contains(.bold))

This will print:

formats: [italic, bold]
all formats: [bold, italic, underline, strikethrough]
is bold: true