typeSpecialization:
     type
   | 'struct'
   | 'union'
   | 'class'
   | 'interface'
   | 'enum'
   | 'function'
   | 'delegate'
   | 'super'
   | 'const'
   | 'immutable'
   | 'inout'
   | 'shared'
   | 'return'
   | 'typedef'
   | '___parameters'
   ;