attrs = {}
else:
attrs = cgi.parse_qs(pattern_name[pos + 1:],
keep_blank_values=1,
strict_parsing=1)
pattern_name = pattern_name[:pos]
for k, v in attrs.items():
if len(v) != 1:
raise AssertionError(
"The attribute name %s was found more than once (%d times) in the tag %s"
% (repr(k), len(v), repr(pattern_name)))
attrs[k] = v[0]
return Expression.Group(pattern_name, convert_list(group_names, terms),
attrs)
# Convert a 'newline' tuple into an AnyEol object
def convert_newline(group_names, name, ignore):
assert ignore is None, "what does it mean when field is %s?" % ` ignore `
return Expression.AnyEol()
# Convert a 'max_repeat' tuple into a MaxRepeat object
def convert_max_repeat(group_names, name, (min_count, max_count, terms)):
return Expression.MaxRepeat(convert_list(group_names, terms), min_count,
max_count)
# Convert a 'groupref' tuple into a GroupRef object
def Group(name, expr, attrs=None):
"""name, expr -> use 'name' to describe a successful match of the expression"""
assert isinstance(expr, Expression.Expression), \
"expecting an Expression, not a %s" % type(expr)
return Expression.Group(name, expr, attrs)
