Attributed String using ResultBuilder and some methods by extending NSMutableAttributedString

NSMutableAttributedString+ResultBuilder.swift

@resultBuilder
enum AttributedStringBuilder {
    static func buildBlock(_ components: NSAttributedString...) -> NSAttributedString {
        let attributedString = NSMutableAttributedString()
        for component in components {
            attributedString.append(component)
        }
        return attributedString
    }
}

extension NSMutableAttributedString {
    public func color(_ color: UIColor) -> NSMutableAttributedString {
        self.addAttribute(NSAttributedString.Key.foregroundColor,
                          value: color,
                          range: NSRange(location: 0, length: self.length)
        )
        return self
    }
    
    public func font(_ font: UIFont) -> NSMutableAttributedString {
        self.addAttribute(NSAttributedString.Key.font,
                          value: font,
                          range: NSRange(location: 0, length: self.length)
        )
        return self
    }
}

// @AttributedStringBuilder
// func greetBuilder(name: String, title: String) -> NSAttributedString {
//     NSMutableAttributedString(string: "Hello ")
//     NSMutableAttributedString(string: name)
//         .color(.red)
//     NSMutableAttributedString(string: ", ")
//     NSMutableAttributedString(string: title)
//         .font(.systemFont(ofSize: 20))
//         .color(.blue)
// }

// greetBuilder(name: "Naruto Uzumaki", title: "The Seventh Hokage")

//: Using typealias
typealias Text = NSMutableAttributedString
@AttributedStringBuilder
func greetBuilder(name: String, title: String) -> NSAttributedString {
    Text("Hello ")
    Text(name)
        .color(.red)
    Text(", ")
    Text(title)
        .font(.systemFont(ofSize: 20))
        .color(.blue)
}

extension NSMutableAttributedString {
    convenience init(_ string: String) {
        self.init(string: string)
    }
}