=========================
Parser (No Parameters)
=========================
parser simple() {
	state testing {}
}

---
(p4program
 (declaration
  (parserDeclaration
   (parserTypeDeclaration
    (parser)
    parser_name: (identifier)
   )
   (parserStates
    (parserState
     (state)
     (identifier)
    )   
   )
  )
 )
)


=========================
Parser (Parameters)
=========================
parser imple(bool pname) {
	state testing {}
}

---
(p4program
 (declaration
  (parserDeclaration
   (parserTypeDeclaration
    (parser)
    (identifier)
    (nonEmptyParameterList
     (parameter
      (typeRef
       (baseType
	(bool)))
      (identifier))))
   (parserStates
    (parserState
     (state)
     (identifier)
    )   
   )
  )
 )
)