test.swift

class Parser<T> : StringLiteralConvertible {
  typealias StringLiteralType = Swift.StringLiteralType
  typealias ExtendedGraphemeClusterLiteralType = ExtendedGraphemeClusterType
  typealias UnicodeScalarLiteralType = UnicodeScalarType

  let token: String

  required init(stringLiteral value: StringLiteralType) {
    self.token = value
  }

  required init(extendedGraphemeClusterLiteral value: ExtendedGraphemeClusterLiteralType) {
    self.token = value
  }

  required init(unicodeScalarLiteral value: UnicodeScalarLiteralType) {
    self.token = value
  }
}

var s: Parser<String> = "hi"

print(s.token)