Resolving dependencies with protocol arguments

[irace]

Hello,

It is possible to do something like this, where the argument passed to the dependency container when trying to resolve a dependency is typed as a protocol?

protocol ArgumentType {}
struct Dependency {}

let container = Container()
container.register(Dependency.self) { (container: ResolverType, argument: ArgumentType) in
  return Dependency()
}

extension String: ArgumentType {}

let dependency = container.resolve(Dependency.self, argument: "I’m the argument!")

This fails to find the registered dependency, this way. If I change the registration to specify String as the argument type, instead of ArgumentType:

container.register(Dependency.self) { (container: ResolverType, argument: String) in
  return Dependency()
}

Then it resolves as expected.

Please advise – thank you!

[irace]

OK, figured it out. This works so long as you do:

let dependency = container.resolve(Dependency.self, argument: "I’m the argument!" as ArgumentType)