Print all CocoaError messages

Playground.swift

import Foundation

var errors = [CocoaError: String]()

for code in 0 ... 4866 {
    
    let error = CocoaError(CocoaError.Code(rawValue: code))
    if let reason = error._nsError.localizedFailureReason {
        errors[error] = reason
    }
}

print("private extension CocoaError {")
print("    static let errorMessages = [")
errors
    .sorted(by: { $0.key.code.rawValue < $1.key.code.rawValue })
    .forEach { print("        Code(rawValue: \($0.key.code.rawValue)): \"\($0.value)\",") }
print("    ]")
print("}")

Used for swiftlang/swift-corelibs-foundation#2148