Invalid escape sequence in literal since 6.6.2

[gierunio]

I use .strings files for country-based regular expressions like postal code validation. Since the fallback attribute was introduced in 6.6.x, I get "Invalid escape sequence in literal" compiler error for strings like "^[a-zA-Z0-9\\/]*$" which is replaced with "^[a-zA-Z0-9\/]*$" for the fallback value.

[Liquidsoul]

Could you provide more inputs on this? Like your configuration or some sample code to reproduce this issue?

[gierunio]

Here is an example project:
SwiftGenExample.zip

I have Localizable.strings file with content:

"postal_code" = "^[0-9]{2}-[0-9]{3}$";
"phone_number" = "^(\\+?48\\s?)?[0-9]{3}\\s?[0-9]{3}\\s?[0-9]{3}$";
"house_number_and_suite" = "^[a-zA-Z0-9\\/]*$";

SwiftGen produces:

internal enum Localized {
  /// ^[a-zA-Z0-9\/]*$
  internal static var houseNumberAndSuite: String { return Localized.tr("Localizable", "house_number_and_suite", fallback: "^[a-zA-Z0-9\/]*$") }
  /// ^(\+?48\s?)?[0-9]{3}\s?[0-9]{3}\s?[0-9]{3}$
  internal static var phoneNumber: String { return Localized.tr("Localizable", "phone_number", fallback: "^(\+?48\s?)?[0-9]{3}\s?[0-9]{3}\s?[0-9]{3}$") }
  /// ^[0-9]{2}-[0-9]{3}$
  internal static var postalCode: String { return Localized.tr("Localizable", "postal_code", fallback: "^[0-9]{2}-[0-9]{3}$") }
}

And I get "Invalid escape sequence in literal" error for the first two strings.
Version 6.5.1 of SwiftGen works just fine, because there is no third parameter with the default value in the tr function.

[Sc4pego4t]

I get the same error