queryparse: remove literal set

1 files changed, 13 insertions, 15 deletions

diff --git a/queryparse.py b/queryparse.py
index 44a42dd..544e9c4 100644
--- a/queryparse.py
+++ b/queryparse.py
@@ -126,46 +126,45 @@ e4 ::= TAG | "[" e1 "]";
 class ParseError(Exception):
 	pass
 
-def e4(lits, l):
+def e4(l):
 	typ,s = classify_head(l)
 
 	if typ == TokType.OPEN:
-		pt,l = e1(lits, l[1:])
+		pt,l = e1(l[1:])
 		typ,_ = classify_head(l)
 		if typ != TokType.CLOSE:
 			raise ParseError
 		return pt,l[1:]
 	elif typ in LitType:
-		lits.add((typ, s))
 		return Atom(typ, s), l[1:]
 	else:
 		raise ParseError
 
-def e3(lits, l):
+def e3(l):
 	typ,_ = classify_head(l)
 	if typ == TokType.NOT:
-		pt,l = e4(lits, l[1:])
+		pt,l = e4(l[1:])
 		return demorgan(pt), l
-	return e4(lits, l)
+	return e4(l)
 
-def e2(lits, l):
-	pt,l = e3(lits, l)
+def e2(l):
+	pt,l = e3(l)
 	try:
 		while True:
-			pt2,l = e3(lits, l)
+			pt2,l = e3(l)
 			pt = encapsulate(pt, TokType.AND)
 			pt.push(pt2)
 	except ParseError:
 		pass
 	return pt,l
 
-def e1(lits, l):
-	pt,l = e2(lits, l)
+def e1(l):
+	pt,l = e2(l)
 	typ,_ = classify_head(l)
 
 	try:
 		while typ == TokType.OR:
-			pt2,l = e2(lits, l[1:])
+			pt2,l = e2(l[1:])
 			pt = encapsulate(pt, TokType.OR)
 			pt.push(pt2)
 			typ,_ = classify_head(l)
@@ -174,8 +173,7 @@ def e1(lits, l):
 	return pt,l
 
 def parse(l):
-	lits = set()
-	x,l = e1(lits, l)
+	x,l = e1(l)
 	if l != []:
 		raise ParseError
-	return x,lits
+	return x