Gets underlying string from SwiftUI's `Text`. Why would you want this? Who knows...

Text+readStrings.swift

import SwiftUI


extension Text {
    func readStrings() -> [String] {
        let mirror = Mirror(reflecting: self)
        
        if let keyMirror = mirror.descendant("storage", "anyTextStorage", "key") {
            // Only contains one string
            let newMirror = Mirror(reflecting: keyMirror)
            guard let str = newMirror.descendant("key") as? String else { return [] }
            guard let arguments = newMirror.descendant("arguments") else { return [] }
            let argumentMirror = Mirror(reflecting: arguments)
            
            // Arguments from string interpolation
            let args = argumentMirror.children.compactMap { arg -> Any? in
                let argMirror = Mirror(reflecting: arg.value)
                return argMirror.descendant("storage", "value", ".0")
            }
            
            guard let args = args as? [CVarArg] else { return [] }
            let formattedString = String(format: str, arguments: args)
            return [formattedString]
        } else {
            // Contains two strings
            var allStrings: [String] = []
            
            if let firstText = mirror.descendant("storage", "anyTextStorage", "first") as? Text {
                allStrings.append(contentsOf: firstText.readStrings())
            }
            if let secondText = mirror.descendant("storage", "anyTextStorage", "second") as? Text {
                allStrings.append(contentsOf: secondText.readStrings())
            }
            
            return allStrings
        }
    }
}


let meaningOfLife = true ? 42 : 0
let string1 = Text("Hello world! \(meaningOfLife)...").readStrings()
let string2 = (Text("Hello") + Text(" world") + Text("! \(meaningOfLife)\("...")")).readStrings()

print(string1)  // Prints:  ["Hello world! 42..."]
print(string2)  // Prints:  ["Hello", " world", "! 42..."]