def push(a):
global stack
print "pushing", a.value
stack.append(a.value)
def pushop(op):
def impl(a):
global stack
stack.append(op)
return impl
def pop():
tmp = stack.pop()
expr = parser('expr')
assignment = parser('assignment')
term = parser('term')
factor = parser('factor')
number = parser('number')
float_p = parser('float_p')
stmt = parser('stmt')
program = parser('program')
program <<= stmt.plus >> end_p
stmt <<= ((assignment | expr) >> tok_p('NEWLINE')) | tok_p('NEWLINE')
assignment <<= (tok_p('IDENTIFIER') >> tok_p('ASSIGN') >> expr)[pushval(0), pushop('s')]
('x', ch_p('x').star, 'x', ('x',)),
('xaaaa', ch_p('x') >> ch_p('a').star,
'xaaaa', ('x', 'a', 'a', 'a', 'a')),
('', ch_p('x').star,
'', ([''])),
('', ch_p('x').plus,
False, None),
('x', ch_p('x').plus,
'x', ('x',)),
('xxxa', ch_p('x').plus,
'xxx', ('x','x','x'))
]
a = parser()
b = parser()
a <<= ch_p('a') >> b
b <<= (ch_p('b') >> a) | end_p
tests += [('ababa', a, 'ababa', ('a', 'b', 'a', 'b', 'a'))]
for t in tests:
test_parse(*t)
