723 lines
27 KiB
Python
723 lines
27 KiB
Python
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# -*- coding: utf-8 -*-
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"""
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This tokenizer has been copied from the ``tokenize.py`` standard library
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tokenizer. The reason was simple: The standard library tokenizer fails
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if the indentation is not right. To make it possible to do error recovery the
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tokenizer needed to be rewritten.
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Basically this is a stripped down version of the standard library module, so
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you can read the documentation there. Additionally we included some speed and
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memory optimizations here.
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"""
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from __future__ import absolute_import
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import sys
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import re
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from collections import namedtuple
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import itertools as _itertools
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from codecs import BOM_UTF8
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from parso.python.token import PythonTokenTypes
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from parso.utils import split_lines
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# Maximum code point of Unicode 6.0: 0x10ffff (1,114,111)
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MAX_UNICODE = '\U0010ffff'
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STRING = PythonTokenTypes.STRING
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NAME = PythonTokenTypes.NAME
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NUMBER = PythonTokenTypes.NUMBER
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OP = PythonTokenTypes.OP
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NEWLINE = PythonTokenTypes.NEWLINE
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INDENT = PythonTokenTypes.INDENT
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DEDENT = PythonTokenTypes.DEDENT
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ENDMARKER = PythonTokenTypes.ENDMARKER
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ERRORTOKEN = PythonTokenTypes.ERRORTOKEN
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ERROR_DEDENT = PythonTokenTypes.ERROR_DEDENT
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FSTRING_START = PythonTokenTypes.FSTRING_START
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FSTRING_STRING = PythonTokenTypes.FSTRING_STRING
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FSTRING_END = PythonTokenTypes.FSTRING_END
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TokenCollection = namedtuple(
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'TokenCollection',
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'pseudo_token single_quoted triple_quoted endpats whitespace '
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'fstring_pattern_map always_break_tokens',
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)
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BOM_UTF8_STRING = BOM_UTF8.decode('utf-8')
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_token_collection_cache = {}
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if sys.version_info.major >= 3:
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# Python 3 has str.isidentifier() to check if a char is a valid identifier
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is_identifier = str.isidentifier
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else:
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# Python 2 doesn't, but it's not that important anymore and if you tokenize
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# Python 2 code with this, it's still ok. It's just that parsing Python 3
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# code with this function is not 100% correct.
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# This just means that Python 2 code matches a few identifiers too much,
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# but that doesn't really matter.
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def is_identifier(s):
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return True
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def group(*choices, **kwargs):
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capture = kwargs.pop('capture', False) # Python 2, arrghhhhh :(
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assert not kwargs
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start = '('
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if not capture:
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start += '?:'
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return start + '|'.join(choices) + ')'
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def maybe(*choices):
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return group(*choices) + '?'
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# Return the empty string, plus all of the valid string prefixes.
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def _all_string_prefixes(version_info, include_fstring=False, only_fstring=False):
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def different_case_versions(prefix):
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for s in _itertools.product(*[(c, c.upper()) for c in prefix]):
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yield ''.join(s)
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# The valid string prefixes. Only contain the lower case versions,
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# and don't contain any permuations (include 'fr', but not
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# 'rf'). The various permutations will be generated.
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valid_string_prefixes = ['b', 'r', 'u']
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if version_info.major >= 3:
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valid_string_prefixes.append('br')
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result = set([''])
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if version_info >= (3, 6) and include_fstring:
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f = ['f', 'fr']
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if only_fstring:
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valid_string_prefixes = f
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result = set()
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else:
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valid_string_prefixes += f
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elif only_fstring:
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return set()
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# if we add binary f-strings, add: ['fb', 'fbr']
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for prefix in valid_string_prefixes:
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for t in _itertools.permutations(prefix):
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# create a list with upper and lower versions of each
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# character
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result.update(different_case_versions(t))
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if version_info.major == 2:
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# In Python 2 the order cannot just be random.
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result.update(different_case_versions('ur'))
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result.update(different_case_versions('br'))
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return result
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def _compile(expr):
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return re.compile(expr, re.UNICODE)
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def _get_token_collection(version_info):
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try:
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return _token_collection_cache[tuple(version_info)]
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except KeyError:
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_token_collection_cache[tuple(version_info)] = result = \
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_create_token_collection(version_info)
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return result
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fstring_string_single_line = _compile(r'(?:\{\{|\}\}|\\(?:\r\n?|\n)|[^{}\r\n])+')
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fstring_string_multi_line = _compile(r'(?:[^{}]+|\{\{|\}\})+')
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fstring_format_spec_single_line = _compile(r'(?:\\(?:\r\n?|\n)|[^{}\r\n])+')
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fstring_format_spec_multi_line = _compile(r'[^{}]+')
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def _create_token_collection(version_info):
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# Note: we use unicode matching for names ("\w") but ascii matching for
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# number literals.
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Whitespace = r'[ \f\t]*'
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whitespace = _compile(Whitespace)
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Comment = r'#[^\r\n]*'
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# Python 2 is pretty much not working properly anymore, we just ignore
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# parsing unicode properly, which is fine, I guess.
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if version_info[0] == 2:
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Name = r'([A-Za-z_0-9]+)'
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elif sys.version_info[0] == 2:
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# Unfortunately the regex engine cannot deal with the regex below, so
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# just use this one.
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Name = r'(\w+)'
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else:
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Name = u'([A-Za-z_0-9\u0080-' + MAX_UNICODE + ']+)'
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if version_info >= (3, 6):
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Hexnumber = r'0[xX](?:_?[0-9a-fA-F])+'
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Binnumber = r'0[bB](?:_?[01])+'
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Octnumber = r'0[oO](?:_?[0-7])+'
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Decnumber = r'(?:0(?:_?0)*|[1-9](?:_?[0-9])*)'
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Intnumber = group(Hexnumber, Binnumber, Octnumber, Decnumber)
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Exponent = r'[eE][-+]?[0-9](?:_?[0-9])*'
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Pointfloat = group(r'[0-9](?:_?[0-9])*\.(?:[0-9](?:_?[0-9])*)?',
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r'\.[0-9](?:_?[0-9])*') + maybe(Exponent)
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Expfloat = r'[0-9](?:_?[0-9])*' + Exponent
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Floatnumber = group(Pointfloat, Expfloat)
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Imagnumber = group(r'[0-9](?:_?[0-9])*[jJ]', Floatnumber + r'[jJ]')
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else:
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Hexnumber = r'0[xX][0-9a-fA-F]+'
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Binnumber = r'0[bB][01]+'
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if version_info.major >= 3:
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Octnumber = r'0[oO][0-7]+'
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else:
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Octnumber = '0[oO]?[0-7]+'
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Decnumber = r'(?:0+|[1-9][0-9]*)'
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Intnumber = group(Hexnumber, Binnumber, Octnumber, Decnumber)
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if version_info[0] < 3:
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Intnumber += '[lL]?'
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Exponent = r'[eE][-+]?[0-9]+'
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Pointfloat = group(r'[0-9]+\.[0-9]*', r'\.[0-9]+') + maybe(Exponent)
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Expfloat = r'[0-9]+' + Exponent
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Floatnumber = group(Pointfloat, Expfloat)
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Imagnumber = group(r'[0-9]+[jJ]', Floatnumber + r'[jJ]')
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Number = group(Imagnumber, Floatnumber, Intnumber)
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# Note that since _all_string_prefixes includes the empty string,
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# StringPrefix can be the empty string (making it optional).
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possible_prefixes = _all_string_prefixes(version_info)
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StringPrefix = group(*possible_prefixes)
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StringPrefixWithF = group(*_all_string_prefixes(version_info, include_fstring=True))
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fstring_prefixes = _all_string_prefixes(version_info, include_fstring=True, only_fstring=True)
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FStringStart = group(*fstring_prefixes)
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# Tail end of ' string.
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Single = r"(?:\\.|[^'\\])*'"
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# Tail end of " string.
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Double = r'(?:\\.|[^"\\])*"'
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# Tail end of ''' string.
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Single3 = r"(?:\\.|'(?!'')|[^'\\])*'''"
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# Tail end of """ string.
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Double3 = r'(?:\\.|"(?!"")|[^"\\])*"""'
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Triple = group(StringPrefixWithF + "'''", StringPrefixWithF + '"""')
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# Because of leftmost-then-longest match semantics, be sure to put the
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# longest operators first (e.g., if = came before ==, == would get
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# recognized as two instances of =).
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Operator = group(r"\*\*=?", r">>=?", r"<<=?",
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r"//=?", r"->",
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r"[+\-*/%&@`|^!=<>]=?",
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r"~")
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Bracket = '[][(){}]'
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special_args = [r'\r\n?', r'\n', r'[;.,@]']
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if version_info >= (3, 0):
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special_args.insert(0, r'\.\.\.')
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if version_info >= (3, 8):
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special_args.insert(0, ":=?")
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else:
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special_args.insert(0, ":")
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Special = group(*special_args)
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Funny = group(Operator, Bracket, Special)
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# First (or only) line of ' or " string.
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ContStr = group(StringPrefix + r"'[^\r\n'\\]*(?:\\.[^\r\n'\\]*)*"
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+ group("'", r'\\(?:\r\n?|\n)'),
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StringPrefix + r'"[^\r\n"\\]*(?:\\.[^\r\n"\\]*)*'
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+ group('"', r'\\(?:\r\n?|\n)'))
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pseudo_extra_pool = [Comment, Triple]
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all_quotes = '"', "'", '"""', "'''"
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if fstring_prefixes:
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pseudo_extra_pool.append(FStringStart + group(*all_quotes))
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PseudoExtras = group(r'\\(?:\r\n?|\n)|\Z', *pseudo_extra_pool)
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PseudoToken = group(Whitespace, capture=True) + \
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group(PseudoExtras, Number, Funny, ContStr, Name, capture=True)
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# For a given string prefix plus quotes, endpats maps it to a regex
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# to match the remainder of that string. _prefix can be empty, for
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# a normal single or triple quoted string (with no prefix).
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endpats = {}
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for _prefix in possible_prefixes:
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endpats[_prefix + "'"] = _compile(Single)
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endpats[_prefix + '"'] = _compile(Double)
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endpats[_prefix + "'''"] = _compile(Single3)
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endpats[_prefix + '"""'] = _compile(Double3)
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# A set of all of the single and triple quoted string prefixes,
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# including the opening quotes.
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single_quoted = set()
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triple_quoted = set()
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fstring_pattern_map = {}
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for t in possible_prefixes:
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for quote in '"', "'":
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single_quoted.add(t + quote)
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for quote in '"""', "'''":
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triple_quoted.add(t + quote)
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for t in fstring_prefixes:
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for quote in all_quotes:
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fstring_pattern_map[t + quote] = quote
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ALWAYS_BREAK_TOKENS = (';', 'import', 'class', 'def', 'try', 'except',
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'finally', 'while', 'with', 'return', 'continue',
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'break', 'del', 'pass', 'global', 'assert')
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if version_info >= (3, 5):
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ALWAYS_BREAK_TOKENS += ('nonlocal', )
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pseudo_token_compiled = _compile(PseudoToken)
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return TokenCollection(
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pseudo_token_compiled, single_quoted, triple_quoted, endpats,
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whitespace, fstring_pattern_map, set(ALWAYS_BREAK_TOKENS)
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)
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class Token(namedtuple('Token', ['type', 'string', 'start_pos', 'prefix'])):
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@property
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def end_pos(self):
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lines = split_lines(self.string)
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if len(lines) > 1:
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return self.start_pos[0] + len(lines) - 1, 0
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else:
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return self.start_pos[0], self.start_pos[1] + len(self.string)
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class PythonToken(Token):
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def __repr__(self):
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return ('TokenInfo(type=%s, string=%r, start_pos=%r, prefix=%r)' %
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self._replace(type=self.type.name))
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class FStringNode(object):
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def __init__(self, quote):
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self.quote = quote
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self.parentheses_count = 0
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self.previous_lines = ''
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self.last_string_start_pos = None
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# In the syntax there can be multiple format_spec's nested:
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# {x:{y:3}}
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self.format_spec_count = 0
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def open_parentheses(self, character):
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self.parentheses_count += 1
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def close_parentheses(self, character):
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self.parentheses_count -= 1
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if self.parentheses_count == 0:
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# No parentheses means that the format spec is also finished.
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self.format_spec_count = 0
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def allow_multiline(self):
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return len(self.quote) == 3
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def is_in_expr(self):
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return self.parentheses_count > self.format_spec_count
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def is_in_format_spec(self):
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return not self.is_in_expr() and self.format_spec_count
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def _close_fstring_if_necessary(fstring_stack, string, line_nr, column, additional_prefix):
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for fstring_stack_index, node in enumerate(fstring_stack):
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lstripped_string = string.lstrip()
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len_lstrip = len(string) - len(lstripped_string)
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if lstripped_string.startswith(node.quote):
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token = PythonToken(
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FSTRING_END,
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node.quote,
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(line_nr, column + len_lstrip),
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prefix=additional_prefix+string[:len_lstrip],
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)
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additional_prefix = ''
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assert not node.previous_lines
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del fstring_stack[fstring_stack_index:]
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return token, '', len(node.quote) + len_lstrip
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return None, additional_prefix, 0
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def _find_fstring_string(endpats, fstring_stack, line, lnum, pos):
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tos = fstring_stack[-1]
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allow_multiline = tos.allow_multiline()
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if tos.is_in_format_spec():
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if allow_multiline:
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regex = fstring_format_spec_multi_line
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else:
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||
|
|
regex = fstring_format_spec_single_line
|
||
|
|
else:
|
||
|
|
if allow_multiline:
|
||
|
|
regex = fstring_string_multi_line
|
||
|
|
else:
|
||
|
|
regex = fstring_string_single_line
|
||
|
|
|
||
|
|
match = regex.match(line, pos)
|
||
|
|
if match is None:
|
||
|
|
return tos.previous_lines, pos
|
||
|
|
|
||
|
|
if not tos.previous_lines:
|
||
|
|
tos.last_string_start_pos = (lnum, pos)
|
||
|
|
|
||
|
|
string = match.group(0)
|
||
|
|
for fstring_stack_node in fstring_stack:
|
||
|
|
end_match = endpats[fstring_stack_node.quote].match(string)
|
||
|
|
if end_match is not None:
|
||
|
|
string = end_match.group(0)[:-len(fstring_stack_node.quote)]
|
||
|
|
|
||
|
|
new_pos = pos
|
||
|
|
new_pos += len(string)
|
||
|
|
# even if allow_multiline is False, we still need to check for trailing
|
||
|
|
# newlines, because a single-line f-string can contain line continuations
|
||
|
|
if string.endswith('\n') or string.endswith('\r'):
|
||
|
|
tos.previous_lines += string
|
||
|
|
string = ''
|
||
|
|
else:
|
||
|
|
string = tos.previous_lines + string
|
||
|
|
|
||
|
|
return string, new_pos
|
||
|
|
|
||
|
|
|
||
|
|
def tokenize(code, version_info, start_pos=(1, 0)):
|
||
|
|
"""Generate tokens from a the source code (string)."""
|
||
|
|
lines = split_lines(code, keepends=True)
|
||
|
|
return tokenize_lines(lines, version_info, start_pos=start_pos)
|
||
|
|
|
||
|
|
|
||
|
|
def _print_tokens(func):
|
||
|
|
"""
|
||
|
|
A small helper function to help debug the tokenize_lines function.
|
||
|
|
"""
|
||
|
|
def wrapper(*args, **kwargs):
|
||
|
|
for token in func(*args, **kwargs):
|
||
|
|
print(token) # This print is intentional for debugging!
|
||
|
|
yield token
|
||
|
|
|
||
|
|
return wrapper
|
||
|
|
|
||
|
|
|
||
|
|
# @_print_tokens
|
||
|
|
def tokenize_lines(lines, version_info, start_pos=(1, 0), indents=None, is_first_token=True):
|
||
|
|
"""
|
||
|
|
A heavily modified Python standard library tokenizer.
|
||
|
|
|
||
|
|
Additionally to the default information, yields also the prefix of each
|
||
|
|
token. This idea comes from lib2to3. The prefix contains all information
|
||
|
|
that is irrelevant for the parser like newlines in parentheses or comments.
|
||
|
|
"""
|
||
|
|
def dedent_if_necessary(start):
|
||
|
|
while start < indents[-1]:
|
||
|
|
if start > indents[-2]:
|
||
|
|
yield PythonToken(ERROR_DEDENT, '', (lnum, start), '')
|
||
|
|
indents[-1] = start
|
||
|
|
break
|
||
|
|
indents.pop()
|
||
|
|
yield PythonToken(DEDENT, '', spos, '')
|
||
|
|
|
||
|
|
pseudo_token, single_quoted, triple_quoted, endpats, whitespace, \
|
||
|
|
fstring_pattern_map, always_break_tokens, = \
|
||
|
|
_get_token_collection(version_info)
|
||
|
|
paren_level = 0 # count parentheses
|
||
|
|
if indents is None:
|
||
|
|
indents = [0]
|
||
|
|
max_ = 0
|
||
|
|
numchars = '0123456789'
|
||
|
|
contstr = ''
|
||
|
|
contline = None
|
||
|
|
# We start with a newline. This makes indent at the first position
|
||
|
|
# possible. It's not valid Python, but still better than an INDENT in the
|
||
|
|
# second line (and not in the first). This makes quite a few things in
|
||
|
|
# Jedi's fast parser possible.
|
||
|
|
new_line = True
|
||
|
|
prefix = '' # Should never be required, but here for safety
|
||
|
|
additional_prefix = ''
|
||
|
|
lnum = start_pos[0] - 1
|
||
|
|
fstring_stack = []
|
||
|
|
for line in lines: # loop over lines in stream
|
||
|
|
lnum += 1
|
||
|
|
pos = 0
|
||
|
|
max_ = len(line)
|
||
|
|
if is_first_token:
|
||
|
|
if line.startswith(BOM_UTF8_STRING):
|
||
|
|
additional_prefix = BOM_UTF8_STRING
|
||
|
|
line = line[1:]
|
||
|
|
max_ = len(line)
|
||
|
|
|
||
|
|
# Fake that the part before was already parsed.
|
||
|
|
line = '^' * start_pos[1] + line
|
||
|
|
pos = start_pos[1]
|
||
|
|
max_ += start_pos[1]
|
||
|
|
|
||
|
|
is_first_token = False
|
||
|
|
|
||
|
|
if contstr: # continued string
|
||
|
|
endmatch = endprog.match(line)
|
||
|
|
if endmatch:
|
||
|
|
pos = endmatch.end(0)
|
||
|
|
yield PythonToken(
|
||
|
|
STRING, contstr + line[:pos],
|
||
|
|
contstr_start, prefix)
|
||
|
|
contstr = ''
|
||
|
|
contline = None
|
||
|
|
else:
|
||
|
|
contstr = contstr + line
|
||
|
|
contline = contline + line
|
||
|
|
continue
|
||
|
|
|
||
|
|
while pos < max_:
|
||
|
|
if fstring_stack:
|
||
|
|
tos = fstring_stack[-1]
|
||
|
|
if not tos.is_in_expr():
|
||
|
|
string, pos = _find_fstring_string(endpats, fstring_stack, line, lnum, pos)
|
||
|
|
if string:
|
||
|
|
yield PythonToken(
|
||
|
|
FSTRING_STRING, string,
|
||
|
|
tos.last_string_start_pos,
|
||
|
|
# Never has a prefix because it can start anywhere and
|
||
|
|
# include whitespace.
|
||
|
|
prefix=''
|
||
|
|
)
|
||
|
|
tos.previous_lines = ''
|
||
|
|
continue
|
||
|
|
if pos == max_:
|
||
|
|
break
|
||
|
|
|
||
|
|
rest = line[pos:]
|
||
|
|
fstring_end_token, additional_prefix, quote_length = _close_fstring_if_necessary(
|
||
|
|
fstring_stack,
|
||
|
|
rest,
|
||
|
|
lnum,
|
||
|
|
pos,
|
||
|
|
additional_prefix,
|
||
|
|
)
|
||
|
|
pos += quote_length
|
||
|
|
if fstring_end_token is not None:
|
||
|
|
yield fstring_end_token
|
||
|
|
continue
|
||
|
|
|
||
|
|
# in an f-string, match until the end of the string
|
||
|
|
if fstring_stack:
|
||
|
|
string_line = line
|
||
|
|
for fstring_stack_node in fstring_stack:
|
||
|
|
quote = fstring_stack_node.quote
|
||
|
|
end_match = endpats[quote].match(line, pos)
|
||
|
|
if end_match is not None:
|
||
|
|
end_match_string = end_match.group(0)
|
||
|
|
if len(end_match_string) - len(quote) + pos < len(string_line):
|
||
|
|
string_line = line[:pos] + end_match_string[:-len(quote)]
|
||
|
|
pseudomatch = pseudo_token.match(string_line, pos)
|
||
|
|
else:
|
||
|
|
pseudomatch = pseudo_token.match(line, pos)
|
||
|
|
|
||
|
|
if pseudomatch:
|
||
|
|
prefix = additional_prefix + pseudomatch.group(1)
|
||
|
|
additional_prefix = ''
|
||
|
|
start, pos = pseudomatch.span(2)
|
||
|
|
spos = (lnum, start)
|
||
|
|
token = pseudomatch.group(2)
|
||
|
|
if token == '':
|
||
|
|
assert prefix
|
||
|
|
additional_prefix = prefix
|
||
|
|
# This means that we have a line with whitespace/comments at
|
||
|
|
# the end, which just results in an endmarker.
|
||
|
|
break
|
||
|
|
initial = token[0]
|
||
|
|
else:
|
||
|
|
match = whitespace.match(line, pos)
|
||
|
|
initial = line[match.end()]
|
||
|
|
start = match.end()
|
||
|
|
spos = (lnum, start)
|
||
|
|
|
||
|
|
if new_line and initial not in '\r\n#' and (initial != '\\' or pseudomatch is None):
|
||
|
|
new_line = False
|
||
|
|
if paren_level == 0 and not fstring_stack:
|
||
|
|
indent_start = start
|
||
|
|
if indent_start > indents[-1]:
|
||
|
|
yield PythonToken(INDENT, '', spos, '')
|
||
|
|
indents.append(indent_start)
|
||
|
|
for t in dedent_if_necessary(indent_start):
|
||
|
|
yield t
|
||
|
|
|
||
|
|
if not pseudomatch: # scan for tokens
|
||
|
|
match = whitespace.match(line, pos)
|
||
|
|
if new_line and paren_level == 0 and not fstring_stack:
|
||
|
|
for t in dedent_if_necessary(match.end()):
|
||
|
|
yield t
|
||
|
|
pos = match.end()
|
||
|
|
new_line = False
|
||
|
|
yield PythonToken(
|
||
|
|
ERRORTOKEN, line[pos], (lnum, pos),
|
||
|
|
additional_prefix + match.group(0)
|
||
|
|
)
|
||
|
|
additional_prefix = ''
|
||
|
|
pos += 1
|
||
|
|
continue
|
||
|
|
|
||
|
|
if (initial in numchars # ordinary number
|
||
|
|
or (initial == '.' and token != '.' and token != '...')):
|
||
|
|
yield PythonToken(NUMBER, token, spos, prefix)
|
||
|
|
elif pseudomatch.group(3) is not None: # ordinary name
|
||
|
|
if token in always_break_tokens and (fstring_stack or paren_level):
|
||
|
|
fstring_stack[:] = []
|
||
|
|
paren_level = 0
|
||
|
|
# We only want to dedent if the token is on a new line.
|
||
|
|
m = re.match(r'[ \f\t]*$', line[:start])
|
||
|
|
if m is not None:
|
||
|
|
for t in dedent_if_necessary(m.end()):
|
||
|
|
yield t
|
||
|
|
if is_identifier(token):
|
||
|
|
yield PythonToken(NAME, token, spos, prefix)
|
||
|
|
else:
|
||
|
|
for t in _split_illegal_unicode_name(token, spos, prefix):
|
||
|
|
yield t # yield from Python 2
|
||
|
|
elif initial in '\r\n':
|
||
|
|
if any(not f.allow_multiline() for f in fstring_stack):
|
||
|
|
# Would use fstring_stack.clear, but that's not available
|
||
|
|
# in Python 2.
|
||
|
|
fstring_stack[:] = []
|
||
|
|
|
||
|
|
if not new_line and paren_level == 0 and not fstring_stack:
|
||
|
|
yield PythonToken(NEWLINE, token, spos, prefix)
|
||
|
|
else:
|
||
|
|
additional_prefix = prefix + token
|
||
|
|
new_line = True
|
||
|
|
elif initial == '#': # Comments
|
||
|
|
assert not token.endswith("\n")
|
||
|
|
if fstring_stack and fstring_stack[-1].is_in_expr():
|
||
|
|
# `#` is not allowed in f-string expressions
|
||
|
|
yield PythonToken(ERRORTOKEN, initial, spos, prefix)
|
||
|
|
pos = start + 1
|
||
|
|
else:
|
||
|
|
additional_prefix = prefix + token
|
||
|
|
elif token in triple_quoted:
|
||
|
|
endprog = endpats[token]
|
||
|
|
endmatch = endprog.match(line, pos)
|
||
|
|
if endmatch: # all on one line
|
||
|
|
pos = endmatch.end(0)
|
||
|
|
token = line[start:pos]
|
||
|
|
yield PythonToken(STRING, token, spos, prefix)
|
||
|
|
else:
|
||
|
|
contstr_start = spos # multiple lines
|
||
|
|
contstr = line[start:]
|
||
|
|
contline = line
|
||
|
|
break
|
||
|
|
|
||
|
|
# Check up to the first 3 chars of the token to see if
|
||
|
|
# they're in the single_quoted set. If so, they start
|
||
|
|
# a string.
|
||
|
|
# We're using the first 3, because we're looking for
|
||
|
|
# "rb'" (for example) at the start of the token. If
|
||
|
|
# we switch to longer prefixes, this needs to be
|
||
|
|
# adjusted.
|
||
|
|
# Note that initial == token[:1].
|
||
|
|
# Also note that single quote checking must come after
|
||
|
|
# triple quote checking (above).
|
||
|
|
elif initial in single_quoted or \
|
||
|
|
token[:2] in single_quoted or \
|
||
|
|
token[:3] in single_quoted:
|
||
|
|
if token[-1] in '\r\n': # continued string
|
||
|
|
# This means that a single quoted string ends with a
|
||
|
|
# backslash and is continued.
|
||
|
|
contstr_start = lnum, start
|
||
|
|
endprog = (endpats.get(initial) or endpats.get(token[1])
|
||
|
|
or endpats.get(token[2]))
|
||
|
|
contstr = line[start:]
|
||
|
|
contline = line
|
||
|
|
break
|
||
|
|
else: # ordinary string
|
||
|
|
yield PythonToken(STRING, token, spos, prefix)
|
||
|
|
elif token in fstring_pattern_map: # The start of an fstring.
|
||
|
|
fstring_stack.append(FStringNode(fstring_pattern_map[token]))
|
||
|
|
yield PythonToken(FSTRING_START, token, spos, prefix)
|
||
|
|
elif initial == '\\' and line[start:] in ('\\\n', '\\\r\n', '\\\r'): # continued stmt
|
||
|
|
additional_prefix += prefix + line[start:]
|
||
|
|
break
|
||
|
|
else:
|
||
|
|
if token in '([{':
|
||
|
|
if fstring_stack:
|
||
|
|
fstring_stack[-1].open_parentheses(token)
|
||
|
|
else:
|
||
|
|
paren_level += 1
|
||
|
|
elif token in ')]}':
|
||
|
|
if fstring_stack:
|
||
|
|
fstring_stack[-1].close_parentheses(token)
|
||
|
|
else:
|
||
|
|
if paren_level:
|
||
|
|
paren_level -= 1
|
||
|
|
elif token.startswith(':') and fstring_stack \
|
||
|
|
and fstring_stack[-1].parentheses_count \
|
||
|
|
- fstring_stack[-1].format_spec_count == 1:
|
||
|
|
# `:` and `:=` both count
|
||
|
|
fstring_stack[-1].format_spec_count += 1
|
||
|
|
token = ':'
|
||
|
|
pos = start + 1
|
||
|
|
|
||
|
|
yield PythonToken(OP, token, spos, prefix)
|
||
|
|
|
||
|
|
if contstr:
|
||
|
|
yield PythonToken(ERRORTOKEN, contstr, contstr_start, prefix)
|
||
|
|
if contstr.endswith('\n') or contstr.endswith('\r'):
|
||
|
|
new_line = True
|
||
|
|
|
||
|
|
if fstring_stack:
|
||
|
|
tos = fstring_stack[-1]
|
||
|
|
if tos.previous_lines:
|
||
|
|
yield PythonToken(
|
||
|
|
FSTRING_STRING, tos.previous_lines,
|
||
|
|
tos.last_string_start_pos,
|
||
|
|
# Never has a prefix because it can start anywhere and
|
||
|
|
# include whitespace.
|
||
|
|
prefix=''
|
||
|
|
)
|
||
|
|
|
||
|
|
end_pos = lnum, max_
|
||
|
|
# As the last position we just take the maximally possible position. We
|
||
|
|
# remove -1 for the last new line.
|
||
|
|
for indent in indents[1:]:
|
||
|
|
indents.pop()
|
||
|
|
yield PythonToken(DEDENT, '', end_pos, '')
|
||
|
|
yield PythonToken(ENDMARKER, '', end_pos, additional_prefix)
|
||
|
|
|
||
|
|
|
||
|
|
def _split_illegal_unicode_name(token, start_pos, prefix):
|
||
|
|
def create_token():
|
||
|
|
return PythonToken(ERRORTOKEN if is_illegal else NAME, found, pos, prefix)
|
||
|
|
|
||
|
|
found = ''
|
||
|
|
is_illegal = False
|
||
|
|
pos = start_pos
|
||
|
|
for i, char in enumerate(token):
|
||
|
|
if is_illegal:
|
||
|
|
if is_identifier(char):
|
||
|
|
yield create_token()
|
||
|
|
found = char
|
||
|
|
is_illegal = False
|
||
|
|
prefix = ''
|
||
|
|
pos = start_pos[0], start_pos[1] + i
|
||
|
|
else:
|
||
|
|
found += char
|
||
|
|
else:
|
||
|
|
new_found = found + char
|
||
|
|
if is_identifier(new_found):
|
||
|
|
found = new_found
|
||
|
|
else:
|
||
|
|
if found:
|
||
|
|
yield create_token()
|
||
|
|
prefix = ''
|
||
|
|
pos = start_pos[0], start_pos[1] + i
|
||
|
|
found = char
|
||
|
|
is_illegal = True
|
||
|
|
|
||
|
|
if found:
|
||
|
|
yield create_token()
|
||
|
|
|
||
|
|
|
||
|
|
if __name__ == "__main__":
|
||
|
|
if len(sys.argv) >= 2:
|
||
|
|
path = sys.argv[1]
|
||
|
|
with open(path) as f:
|
||
|
|
code = f.read()
|
||
|
|
else:
|
||
|
|
code = sys.stdin.read()
|
||
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from parso.utils import python_bytes_to_unicode, parse_version_string
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|
||
|
|
if isinstance(code, bytes):
|
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|
|
code = python_bytes_to_unicode(code)
|
||
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|
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|
|
for token in tokenize(code, parse_version_string()):
|
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|
|
print(token)
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