def Repeat(matcher, start=0, stop=None, algorithm=DEPTH_FIRST,
separator=None, add_=False):
'''
This is called by the [] operator. It repeats the given matcher between
start and stop number of times (inclusive). If ``add`` is true then the
results are joined with `Add`. If ``separator`` is given then each
repetition is separated by that matcher.
'''
first = coerce_(matcher)
if separator is None:
rest = first
else:
rest = And(coerce_(separator, Regexp), first)
if start is None:
start = 0
assert_type('The start index for Repeat or [...]', start, int)
assert_type('The stop index for Repeat or [...]', stop, int, none_ok=True)
assert_type('The algorithm/increment for Repeat or [...]', algorithm, str)
if start < 0:
raise ValueError('Repeat or [...] cannot have a negative start.')
if stop is not None and stop < start:
raise ValueError('Repeat or [...] must have a stop '
'value greater than or equal to the start.')
if 'dbgn'.find(algorithm) == -1:
raise ValueError('Repeat or [...] must have a step (algorithm) '
'of d, b, g or n.')
add_ = Add if add_ else Identity
return {DEPTH_FIRST:
add_(DepthFirst(first=first, start=start,
stop=stop, rest=rest)),
BREADTH_FIRST:
add_(BreadthFirst(first=first, start=start,
stop=stop, rest=rest)),
GREEDY:
add_(OrderByResultCount(BreadthFirst(first=first, start=start,
stop=stop, rest=rest))),
NON_GREEDY:
add_(OrderByResultCount(BreadthFirst(first=first, start=start,
stop=stop, rest=rest),
False))
}[algorithm]
def assert_bad(self, name, value, type_, none_ok, msg):
try:
assert_type(name, value, type_, none_ok=none_ok)
assert False, "Expected failure"
except TypeError as e:
assert e.args[0] == msg, e.args[0]
def test_ok(self):
assert_type("", 1, int)
assert_type("", "", str)
assert_type("", None, int, none_ok=True)
def assert_bad(self, name, value, type_, none_ok, msg):
try:
assert_type(name, value, type_, none_ok=none_ok)
assert False, 'Expected failure'
except TypeError as e:
assert e.args[0] == msg, e.args[0]
def test_ok(self):
assert_type('', 1, int)
assert_type('', '', str)
assert_type('', None, int, none_ok=True)
