w.setExpr(BGF.Expression(nt))
return BGF.Expression(w)
if __name__ == "__main__":
g = BGF.Grammar()
prod = 400
term = 150
for i in range(0, prod):
p = BGF.Production()
p.setNT('nt' + str(i))
p.setExpr(BGF.Expression(singles[i % 3]))
g.addProd(p)
p = BGF.Production()
p.setNT('nt' + str(i))
a = ntd('nt' + str((i + 1) % prod), BGF.Plus)
b = ntd('nt' + str((i + 2) % prod), BGF.Star)
c = ntd('nt' + str((i + 3) % prod), BGF.Optional)
bc = BGF.Choice()
bc.add(b)
bc.add(c)
abc = BGF.Sequence()
abc.add(a)
abc.add(BGF.Expression(bc))
d = BGF.Terminal()
d.setName('t' + str(i % term))
abc.add(BGF.Expression(d))
p.setExpr(BGF.Expression(abc))
g.addProd(p)
ET.ElementTree(g.getXml()).write('monster.bgf')
# if there is whitespace between the label and the :
prod.setLabel(alt[0])
alt = alt[2:]
if alt and len(alt) > 1 and alt[0][:2] == '/*':
if alt[0].find('*/') > 0:
alt[0] = alt[0][:alt[0].
index('/*')] + alt[0][alt[0].index('*/') +
2:]
if alt[0] == '':
alt = alt[1:]
# had to do it the second time - bad sign
if alt and len(alt) > 0 and alt[0][-1] == ':':
prod.setLabel(alt[0][:-1])
alt = alt[1:]
cx = 0
seq = BGF.Sequence()
sym = None
#print '['+str(cx)+']',alt
while cx < len(alt):
if alt[cx][-1] == ';':
alt[cx] = alt[cx][:-1]
print '[' + str(cx) + ']', '@', alt
if curly > 0:
if alt[cx] == '{':
curly += 1
#print 'MORE CURLY'
elif alt[cx] == '}':
curly -= 1
#print 'LESS CURLY'
#print 'Skipped over',alt[cx]
cx += 1