# Import from the Standard Library
from unittest import TestCase, main
# Import from itools
from itools.abnf import build_grammar, get_parser, BaseContext
###########################################################################
# Grammar / LR(1)
###########################################################################
lr1_grammar = build_grammar('S = A\r\n'
'S = "xb"\r\n'
'A = "a" A "b"\r\n'
'A = B\r\n'
'B = "x"\r\n')
lr1_parser = get_parser(lr1_grammar, 'S')
###########################################################################
# Grammar / Expressions
###########################################################################
expression_grammar = ('E = I\r\n'
'E = E "+" E\r\n'
'E = E "*" E\r\n'
'I = 1*DIGIT\r\n')
class ExpressionContext(BaseContext):
def I(self, start, end, *args):
return int(self.data[start:end])
def E_1(self, start, end, value):
fragment = fragment and fragment[0] or ''
return scheme, hier_part[0], hier_part[1], query, fragment
def relative_ref(self, start, end, relative_part, query, fragment):
query = query and query[0] or ''
fragment = fragment and fragment[0] or ''
return ('', relative_part[0], relative_part[1], query, fragment)
def URI_reference(self, start, end, uri):
return uri
uri_grammar = build_grammar(uri_grammar, URIContext)
uri_parser = get_parser(uri_grammar, 'URI-reference')
def parse_uri(data):
context = URIContext(data)
return uri_parser.run(data, context)
class GenericDataType2(object):
@staticmethod
def decode(data):
if isinstance(data, Path):
return Reference('', '', data, {}, None)
def URI(self, start, end, scheme, hier_part, query, fragment):
query = query and query[0] or ''
fragment = fragment and fragment[0] or ''
return scheme, hier_part[0], hier_part[1], query, fragment
def relative_ref(self, start, end, relative_part, query, fragment):
query = query and query[0] or ''
fragment = fragment and fragment[0] or ''
return ('', relative_part[0], relative_part[1], query, fragment)
def URI_reference(self, start, end, uri):
return uri
uri_grammar = build_grammar(uri_grammar, URIContext)
uri_parser = get_parser(uri_grammar, 'URI-reference')
def parse_uri(data):
context = URIContext(data)
return uri_parser.run(data, context)
class GenericDataType2(object):
@staticmethod
def decode(data):
if isinstance(data, Path):
return Reference('', '', data, {}, None)
if not isinstance(data, (str, unicode)):
raise TypeError, 'unexpected %s' % type(data)
# Import from itools
from itools.abnf import build_grammar, get_parser, BaseContext
###########################################################################
# Grammar / LR(1)
###########################################################################
lr1_grammar = build_grammar(
'S = A\r\n'
'S = "xb"\r\n'
'A = "a" A "b"\r\n'
'A = B\r\n'
'B = "x"\r\n')
lr1_parser = get_parser(lr1_grammar, 'S')
###########################################################################
# Grammar / Expressions
###########################################################################
expression_grammar = (
'E = I\r\n'
'E = E "+" E\r\n'
'E = E "*" E\r\n'
'I = 1*DIGIT\r\n')
class ExpressionContext(BaseContext):
def I(self, start, end, *args):