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GeezerVison is showing github.com — vscode-python/pythonFiles/parso/python/prefix.py at master · testvinder/vscode-python

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import re
from codecs import BOM_UTF8
from parso.python.tokenize import group
unicode_bom = BOM_UTF8.decode('utf-8')
class PrefixPart(object):
def __init__(self, leaf, typ, value, spacing='', start_pos=None):
assert start_pos is not None
self.parent = leaf
self.type = typ
self.value = value
self.spacing = spacing
self.start_pos = start_pos
@property
def end_pos(self):
if self.value.endswith('\n'):
return self.start_pos[0] + 1, 0
if self.value == unicode_bom:
# The bom doesn't have a length at the start of a Python file.
return self.start_pos
return self.start_pos[0], self.start_pos[1] + len(self.value)
def create_spacing_part(self):
column = self.start_pos[1] - len(self.spacing)
return PrefixPart(
self.parent, 'spacing', self.spacing,
start_pos=(self.start_pos[0], column)
)
def __repr__(self):
return '%s(%s, %s, %s)' % (
self.__class__.__name__,
self.type,
repr(self.value),
self.start_pos
)
_comment = r'#[^\n\r\f]*'
_backslash = r'\\\r?\n'
_newline = r'\r?\n'
_form_feed = r'\f'
_only_spacing = '$'
_spacing = r'[ \t]*'
_bom = unicode_bom
_regex = group(
_comment, _backslash, _newline, _form_feed, _only_spacing, _bom,
capture=True
)
_regex = re.compile(group(_spacing, capture=True) + _regex)
_types = {
'#': 'comment',
'\\': 'backslash',
'\f': 'formfeed',
'\n': 'newline',
'\r': 'newline',
unicode_bom: 'bom'
}
def split_prefix(leaf, start_pos):
line, column = start_pos
start = 0
value = spacing = ''
bom = False
while start != len(leaf.prefix):
match =_regex.match(leaf.prefix, start)
spacing = match.group(1)
value = match.group(2)
if not value:
break
type_ = _types[value[0]]
yield PrefixPart(
leaf, type_, value, spacing,
start_pos=(line, column + start - int(bom) + len(spacing))
)
if type_ == 'bom':
bom = True
start = match.end(0)
if value.endswith('\n'):
line += 1
column = -start
if value:
spacing = ''
yield PrefixPart(
leaf, 'spacing', spacing,
start_pos=(line, column + start)
)
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