grammar LdapFilter
 
	rule filter
		'(' item:( or_filter / and_filter / item )+ ')' <Filter> {
			def blah 
				pp item
			end
		}
	end
 
	rule and_filter
		'&' filter:( filter )+ 
	end
 
	rule or_filter
		'|' filter:( filter )+ 
	end
 
	rule regular_item
		eq_simple / ge_simple / le_simple
	end
 
	rule not_item
		'!' regular_item
	end
 
	rule item
		regular_item / not_item
	end
 
	rule eq_simple
		( identifier '=' value )
	end
 
	rule ge_simple
		( identifier '>=' value )
	end
 
	rule le_simple
		( identifier '<=' value ) 
	end
 
	rule identifier
		[[:alnum:]]+ 
	end
 
	rule value
		[^\p{Z}\p{C}^()]+ 
	end
end

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