X-Git-Url: https://git.madduck.net/etc/vim.git/blobdiff_plain/e74117f172e29e8a980e2c9de929ad50d3769150..4931ddd0b1f84910790bebcd86c2147d1ddcf1e1:/blib2to3/pgen2/tokenize.py?ds=sidebyside diff --git a/blib2to3/pgen2/tokenize.py b/blib2to3/pgen2/tokenize.py index 14560e4..1f51ff0 100644 --- a/blib2to3/pgen2/tokenize.py +++ b/blib2to3/pgen2/tokenize.py @@ -29,9 +29,9 @@ __author__ = 'Ka-Ping Yee ' __credits__ = \ 'GvR, ESR, Tim Peters, Thomas Wouters, Fred Drake, Skip Montanaro' -import string, re +import re from codecs import BOM_UTF8, lookup -from lib2to3.pgen2.token import * +from blib2to3.pgen2.token import * from . import token __all__ = [x for x in dir(token) if x[0] != '_'] + ["tokenize", @@ -48,11 +48,15 @@ except NameError: def group(*choices): return '(' + '|'.join(choices) + ')' def any(*choices): return group(*choices) + '*' def maybe(*choices): return group(*choices) + '?' +def _combinations(*l): + return set( + x + y for x in l for y in l + ("",) if x.casefold() != y.casefold() + ) Whitespace = r'[ \f\t]*' Comment = r'#[^\r\n]*' Ignore = Whitespace + any(r'\\\r?\n' + Whitespace) + maybe(Comment) -Name = r'[a-zA-Z_]\w*' +Name = r'\w+' # this is invalid but it's fine because Name comes after Number in all groups Binnumber = r'0[bB]_?[01]+(?:_[01]+)*' Hexnumber = r'0[xX]_?[\da-fA-F]+(?:_[\da-fA-F]+)*[lL]?' @@ -74,7 +78,7 @@ Double = r'[^"\\]*(?:\\.[^"\\]*)*"' Single3 = r"[^'\\]*(?:(?:\\.|'(?!''))[^'\\]*)*'''" # Tail end of """ string. Double3 = r'[^"\\]*(?:(?:\\.|"(?!""))[^"\\]*)*"""' -_litprefix = r"(?:[uUrRbBfF]|[rR][bB]|[bBuU][rR])?" +_litprefix = r"(?:[uUrRbBfF]|[rR][fFbB]|[fFbBuU][rR])?" Triple = group(_litprefix + "'''", _litprefix + '"""') # Single-line ' or " string. String = group(_litprefix + r"'[^\n'\\]*(?:\\.[^\n'\\]*)*'", @@ -103,61 +107,33 @@ ContStr = group(_litprefix + r"'[^\n'\\]*(?:\\.[^\n'\\]*)*" + PseudoExtras = group(r'\\\r?\n', Comment, Triple) PseudoToken = Whitespace + group(PseudoExtras, Number, Funny, ContStr, Name) -tokenprog, pseudoprog, single3prog, double3prog = list(map( - re.compile, (Token, PseudoToken, Single3, Double3))) +tokenprog = re.compile(Token, re.UNICODE) +pseudoprog = re.compile(PseudoToken, re.UNICODE) +single3prog = re.compile(Single3) +double3prog = re.compile(Double3) + +_strprefixes = ( + _combinations('r', 'R', 'f', 'F') | + _combinations('r', 'R', 'b', 'B') | + {'u', 'U', 'ur', 'uR', 'Ur', 'UR'} +) + endprogs = {"'": re.compile(Single), '"': re.compile(Double), "'''": single3prog, '"""': double3prog, - "r'''": single3prog, 'r"""': double3prog, - "u'''": single3prog, 'u"""': double3prog, - "b'''": single3prog, 'b"""': double3prog, - "f'''": single3prog, 'f"""': double3prog, - "ur'''": single3prog, 'ur"""': double3prog, - "br'''": single3prog, 'br"""': double3prog, - "rb'''": single3prog, 'rb"""': double3prog, - "R'''": single3prog, 'R"""': double3prog, - "U'''": single3prog, 'U"""': double3prog, - "B'''": single3prog, 'B"""': double3prog, - "F'''": single3prog, 'F"""': double3prog, - "uR'''": single3prog, 'uR"""': double3prog, - "Ur'''": single3prog, 'Ur"""': double3prog, - "UR'''": single3prog, 'UR"""': double3prog, - "bR'''": single3prog, 'bR"""': double3prog, - "Br'''": single3prog, 'Br"""': double3prog, - "BR'''": single3prog, 'BR"""': double3prog, - "rB'''": single3prog, 'rB"""': double3prog, - "Rb'''": single3prog, 'Rb"""': double3prog, - "RB'''": single3prog, 'RB"""': double3prog, - 'r': None, 'R': None, - 'u': None, 'U': None, - 'f': None, 'F': None, - 'b': None, 'B': None} - -triple_quoted = {} -for t in ("'''", '"""', - "r'''", 'r"""', "R'''", 'R"""', - "u'''", 'u"""', "U'''", 'U"""', - "b'''", 'b"""', "B'''", 'B"""', - "f'''", 'f"""', "F'''", 'F"""', - "ur'''", 'ur"""', "Ur'''", 'Ur"""', - "uR'''", 'uR"""', "UR'''", 'UR"""', - "br'''", 'br"""', "Br'''", 'Br"""', - "bR'''", 'bR"""', "BR'''", 'BR"""', - "rb'''", 'rb"""', "Rb'''", 'Rb"""', - "rB'''", 'rB"""', "RB'''", 'RB"""',): - triple_quoted[t] = t -single_quoted = {} -for t in ("'", '"', - "r'", 'r"', "R'", 'R"', - "u'", 'u"', "U'", 'U"', - "b'", 'b"', "B'", 'B"', - "f'", 'f"', "F'", 'F"', - "ur'", 'ur"', "Ur'", 'Ur"', - "uR'", 'uR"', "UR'", 'UR"', - "br'", 'br"', "Br'", 'Br"', - "bR'", 'bR"', "BR'", 'BR"', - "rb'", 'rb"', "Rb'", 'Rb"', - "rB'", 'rB"', "RB'", 'RB"',): - single_quoted[t] = t + **{f"{prefix}'''": single3prog for prefix in _strprefixes}, + **{f'{prefix}"""': double3prog for prefix in _strprefixes}, + **{prefix: None for prefix in _strprefixes}} + +triple_quoted = ( + {"'''", '"""'} | + {f"{prefix}'''" for prefix in _strprefixes} | + {f'{prefix}"""' for prefix in _strprefixes} +) +single_quoted = ( + {"'", '"'} | + {f"{prefix}'" for prefix in _strprefixes} | + {f'{prefix}"' for prefix in _strprefixes} +) tabsize = 8 @@ -234,7 +210,7 @@ class Untokenizer: for tok in iterable: toknum, tokval = tok[:2] - if toknum in (NAME, NUMBER): + if toknum in (NAME, NUMBER, ASYNC, AWAIT): tokval += ' ' if toknum == INDENT: @@ -375,11 +351,17 @@ def generate_tokens(readline): logical line; continuation lines are included. """ lnum = parenlev = continued = 0 - namechars, numchars = string.ascii_letters + '_', '0123456789' + numchars = '0123456789' contstr, needcont = '', 0 contline = None indents = [0] + # 'stashed' and 'async_*' are used for async/await parsing + stashed = None + async_def = False + async_def_indent = 0 + async_def_nl = False + while 1: # loop over lines in stream try: line = readline() @@ -420,31 +402,46 @@ def generate_tokens(readline): pos = pos + 1 if pos == max: break - if line[pos] in '#\r\n': # skip comments or blank lines - if line[pos] == '#': - comment_token = line[pos:].rstrip('\r\n') - nl_pos = pos + len(comment_token) - yield (COMMENT, comment_token, - (lnum, pos), (lnum, pos + len(comment_token)), line) - yield (NL, line[nl_pos:], - (lnum, nl_pos), (lnum, len(line)), line) - else: - yield ((NL, COMMENT)[line[pos] == '#'], line[pos:], - (lnum, pos), (lnum, len(line)), line) + if stashed: + yield stashed + stashed = None + + if line[pos] in '\r\n': # skip blank lines + yield (NL, line[pos:], (lnum, pos), (lnum, len(line)), line) continue - if column > indents[-1]: # count indents or dedents + if line[pos] == '#': # skip comments + comment_token = line[pos:].rstrip('\r\n') + nl_pos = pos + len(comment_token) + yield (COMMENT, comment_token, + (lnum, pos), (lnum, pos + len(comment_token)), line) + yield (NL, line[nl_pos:], + (lnum, nl_pos), (lnum, len(line)), line) + continue + + if column > indents[-1]: # count indents indents.append(column) yield (INDENT, line[:pos], (lnum, 0), (lnum, pos), line) - while column < indents[-1]: + + while column < indents[-1]: # count dedents if column not in indents: raise IndentationError( "unindent does not match any outer indentation level", ("", lnum, pos, line)) indents = indents[:-1] + if async_def and async_def_indent >= indents[-1]: + async_def = False + async_def_nl = False + async_def_indent = 0 + yield (DEDENT, '', (lnum, pos), (lnum, pos), line) + if async_def and async_def_nl and async_def_indent >= indents[-1]: + async_def = False + async_def_nl = False + async_def_indent = 0 + else: # continued statement if not line: raise TokenError("EOF in multi-line statement", (lnum, 0)) @@ -464,10 +461,18 @@ def generate_tokens(readline): newline = NEWLINE if parenlev > 0: newline = NL + elif async_def: + async_def_nl = True + if stashed: + yield stashed + stashed = None yield (newline, token, spos, epos, line) elif initial == '#': assert not token.endswith("\n") + if stashed: + yield stashed + stashed = None yield (COMMENT, token, spos, epos, line) elif token in triple_quoted: endprog = endprogs[token] @@ -475,6 +480,9 @@ def generate_tokens(readline): if endmatch: # all on one line pos = endmatch.end(0) token = line[start:pos] + if stashed: + yield stashed + stashed = None yield (STRING, token, spos, (lnum, pos), line) else: strstart = (lnum, start) # multiple lines @@ -492,22 +500,64 @@ def generate_tokens(readline): contline = line break else: # ordinary string + if stashed: + yield stashed + stashed = None yield (STRING, token, spos, epos, line) - elif initial in namechars: # ordinary name - yield (NAME, token, spos, epos, line) + elif initial.isidentifier(): # ordinary name + if token in ('async', 'await'): + if async_def: + yield (ASYNC if token == 'async' else AWAIT, + token, spos, epos, line) + continue + + tok = (NAME, token, spos, epos, line) + if token == 'async' and not stashed: + stashed = tok + continue + + if token in ('def', 'for'): + if (stashed + and stashed[0] == NAME + and stashed[1] == 'async'): + + if token == 'def': + async_def = True + async_def_indent = indents[-1] + + yield (ASYNC, stashed[1], + stashed[2], stashed[3], + stashed[4]) + stashed = None + + if stashed: + yield stashed + stashed = None + + yield tok elif initial == '\\': # continued stmt # This yield is new; needed for better idempotency: + if stashed: + yield stashed + stashed = None yield (NL, token, spos, (lnum, pos), line) continued = 1 else: if initial in '([{': parenlev = parenlev + 1 elif initial in ')]}': parenlev = parenlev - 1 + if stashed: + yield stashed + stashed = None yield (OP, token, spos, epos, line) else: yield (ERRORTOKEN, line[pos], (lnum, pos), (lnum, pos+1), line) pos = pos + 1 + if stashed: + yield stashed + stashed = None + for indent in indents[1:]: # pop remaining indent levels yield (DEDENT, '', (lnum, 0), (lnum, 0), '') yield (ENDMARKER, '', (lnum, 0), (lnum, 0), '')