def _not_parser(tokens, s):
if s.pos >= len(tokens):
raise p.NoParseError('no tokens left in the stream', s)
try:
parser.run(tokens, s)
except p.NoParseError:
pos = s.pos + 1
s2 = p.State(pos, max(pos, s.max))
return None, s2
else:
raise p.NoParseError('parsing failed', s)
def _helper(tokens, s):
res = []
try:
p.run(tokens, s)
except fp.NoParseError as e:
return fp._Ignored(()), s
raise fp.NoParseError(u'followed by something we did not want', s)
def unit_value_parser(tokens, s):
if s.pos >= len(tokens) - 1:
raise fp.NoParseError(u'no tokens left in the stream', s)
else:
value, s1 = p.number.run(tokens, s)
unit_name, s2 = unit_parser.run(tokens, s1)
return Value(UNITS_BY_NAME[unit_name], value), s2
def _helper(tokens, s):
"""Iterative implementation preventing the stack overflow."""
res = []
s2 = s
while s2.pos < len(tokens):
try:
(v, s3) = p.run(tokens, s2)
return res, s3
except fp.NoParseError as e:
res.append(tokens[s2.pos])
pos = s2.pos + 1
s2 = fp.State(pos, max(pos, s2.max))
raise fp.NoParseError(u'no tokens left in the stream', s)
def _helper(tokens, s):
"""Iterative implementation preventing the stack overflow."""
res = []
start = s.pos
end = start + len(xs)
toks = tokens[start:end]
if _DEBUG:
vals = [t.value for t in toks]
else:
vals = toks
if vals == xs:
pos = s.pos + len(xs)
s2 = fp.State(pos, max(pos, s.max))
return fp._Ignored(()), s2
else:
raise fp.NoParseError(u'Did not match literal ' + xs, s)
