Objective-C PEG grammar (first attempt)

objc-header-grammar.txt

interface      = "@interface" _ identifier _ (":" _ identifier)? _ protocols? _ (property / selector)* _ "@end" _ eof
protocols      = "<" _ identifier (_ "," _ identifier)* _ ">"
property       = "@property" _ attributes? _ type _ pointer? _ identifier _ ";" _
attributes     = "(" _ attribute (_ "," _ attribute)* _ ")"
attribute      = getter / identifier
getter         = identifier _ "=" _ identifier
selector       = ("+" / "-") _ typereference _ (selectorpart+ / identifier) _ ";" _
selectorpart   = identifier _ ":" _ typereference _ identifier _
typereference  = "(" _ type _ pointer? _ ")"
type           = list / dict / set / identifier
list           = "NS" mutable? "Array"      _ "<" _                                   type _ pointer? _ ">"
set            = "NS" mutable? "Set"        _ "<" _                                   type _ pointer? _ ">"
dict           = "NS" mutable? "Dictionary" _ "<" _ type _ pointer? _ "," _ type _ pointer? _ ">"
mutable        = "Mutable"
pointer        = "*"
identifier     = $([a-zA-Z]+)
_              = ws / eol
ws             = $([ \t\n\r]*) 
eol            = [\n] 
eof            = !.