diff options
Diffstat (limited to 'Lib/tabnanny.py')
| -rwxr-xr-x | Lib/tabnanny.py | 205 |
1 files changed, 128 insertions, 77 deletions
diff --git a/Lib/tabnanny.py b/Lib/tabnanny.py index 28bd701..9af8ecb 100755 --- a/Lib/tabnanny.py +++ b/Lib/tabnanny.py @@ -1,29 +1,16 @@ -#! /home/guido/python/src/sparc/python #! /usr/bin/env python -"""The Tab Nanny despises ambiguous indentation. She knows no mercy. +"""The Tab Nanny despises ambiguous indentation. She knows no mercy.""" -CAUTION: this version requires Guido's "NL" patch to lib/tokenize.py, -posted 30-Mar-98. This version will not run at all with an unpatched -tokenize (it will raise AttributeError while loading), while previous -versions will run incorrectly with the patched tokenize. -""" +# Released to the public domain, by Tim Peters, 4 April 1998. -# Released to the public domain, by Tim Peters, 30 March 1998. - -__version__ = "2" +__version__ = "3" import os import sys import getopt import tokenize -try: - tokenize.NL -except AttributeError: - raise AttributeError, "Sorry, I need a version of tokenize.py " \ - "that supports the NL pseudo-token." - verbose = 0 def main(): @@ -235,67 +222,131 @@ def format_witnesses(w): prefix = prefix + "s" return prefix + " " + string.join(firsts, ', ') -indents = [] -check_equal = 0 - -def reset_globals(): - global indents, check_equal - check_equal = 0 - indents = [Whitespace("")] - -def tokeneater(type, token, start, end, line, - INDENT=tokenize.INDENT, - DEDENT=tokenize.DEDENT, - NEWLINE=tokenize.NEWLINE, - COMMENT=tokenize.COMMENT, - NL=tokenize.NL): - global indents, check_equal - - # test in decreasing order of frequency, although the check_equal - # test *must* be last; INDENT and DEDENT appear equally often - - if type in (COMMENT, NL): - # the indentation of these guys is meaningless - pass - - elif type == NEWLINE: - # a program statement, or ENDMARKER, will eventually follow, - # after some (possibly empty) run of tokens of the form - # (NL | COMMENT)* (INDENT | DEDENT+)? - # If an INDENT appears, setting check_equal is wrong, and will - # be undone when we see the INDENT. - check_equal = 1 - - elif type == INDENT: - check_equal = 0 - thisguy = Whitespace(token) - if not indents[-1].less(thisguy): - witness = indents[-1].not_less_witness(thisguy) - msg = "indent not greater e.g. " + format_witnesses(witness) - raise NannyNag(start[0], msg, line) - indents.append(thisguy) - - elif type == DEDENT: - # there's nothing we need to check here! what's important is - # that when the run of DEDENTs ends, the indentation of the - # program statement (or ENDMARKER) that triggered the run is - # equal to what's left at the top of the indents stack - assert check_equal # else no earlier NEWLINE, or an earlier INDENT - del indents[-1] - - elif check_equal: - # this is the first "real token" following a NEWLINE, so it - # must be the first token of the next program statment, or an - # ENDMARKER; the "line" argument exposes the leading whitespace - # for this statement; in the case of ENDMARKER, line is an empty - # string, so will properly match the empty string with which the - # "indents" stack was seeded - check_equal = 0 - thisguy = Whitespace(line) - if not indents[-1].equal(thisguy): - witness = indents[-1].not_equal_witness(thisguy) - msg = "indent not equal e.g. " + format_witnesses(witness) - raise NannyNag(start[0], msg, line) +# The collection of globals, the reset_globals() function, and the +# tokeneater() function, depend on which version of tokenize is +# in use. + +if hasattr(tokenize, 'NL'): + # take advantage of Guido's patch! + + indents = [] + check_equal = 0 + + def reset_globals(): + global indents, check_equal + check_equal = 0 + indents = [Whitespace("")] + + def tokeneater(type, token, start, end, line, + INDENT=tokenize.INDENT, + DEDENT=tokenize.DEDENT, + NEWLINE=tokenize.NEWLINE, + COMMENT=tokenize.COMMENT, + NL=tokenize.NL): + global indents, check_equal + + # test in decreasing order of frequency, although the check_equal + # test *must* be last; INDENT and DEDENT appear equally often + + if type in (COMMENT, NL): + # the indentation of these guys is meaningless + pass + + elif type == NEWLINE: + # a program statement, or ENDMARKER, will eventually follow, + # after some (possibly empty) run of tokens of the form + # (NL | COMMENT)* (INDENT | DEDENT+)? + # If an INDENT appears, setting check_equal is wrong, and will + # be undone when we see the INDENT. + check_equal = 1 + + elif type == INDENT: + check_equal = 0 + thisguy = Whitespace(token) + if not indents[-1].less(thisguy): + witness = indents[-1].not_less_witness(thisguy) + msg = "indent not greater e.g. " + format_witnesses(witness) + raise NannyNag(start[0], msg, line) + indents.append(thisguy) + + elif type == DEDENT: + # there's nothing we need to check here! what's important is + # that when the run of DEDENTs ends, the indentation of the + # program statement (or ENDMARKER) that triggered the run is + # equal to what's left at the top of the indents stack + assert check_equal # else no earlier NEWLINE, or an earlier INDENT + del indents[-1] + + elif check_equal: + # this is the first "real token" following a NEWLINE, so it + # must be the first token of the next program statement, or an + # ENDMARKER; the "line" argument exposes the leading whitespace + # for this statement; in the case of ENDMARKER, line is an empty + # string, so will properly match the empty string with which the + # "indents" stack was seeded + check_equal = 0 + thisguy = Whitespace(line) + if not indents[-1].equal(thisguy): + witness = indents[-1].not_equal_witness(thisguy) + msg = "indent not equal e.g. " + format_witnesses(witness) + raise NannyNag(start[0], msg, line) + +else: + # unpatched version of tokenize + + nesting_level = 0 + indents = [] + check_equal = 0 + + def reset_globals(): + global nesting_level, indents, check_equal + nesting_level = check_equal = 0 + indents = [Whitespace("")] + + def tokeneater(type, token, start, end, line, + INDENT=tokenize.INDENT, + DEDENT=tokenize.DEDENT, + NEWLINE=tokenize.NEWLINE, + COMMENT=tokenize.COMMENT, + OP=tokenize.OP): + global nesting_level, indents, check_equal + + if type == INDENT: + check_equal = 0 + thisguy = Whitespace(token) + if not indents[-1].less(thisguy): + witness = indents[-1].not_less_witness(thisguy) + msg = "indent not greater e.g. " + format_witnesses(witness) + raise NannyNag(start[0], msg, line) + indents.append(thisguy) + + elif type == DEDENT: + del indents[-1] + + elif type == NEWLINE: + if nesting_level == 0: + check_equal = 1 + + elif type == COMMENT: + pass + + elif check_equal: + check_equal = 0 + thisguy = Whitespace(line) + if not indents[-1].equal(thisguy): + witness = indents[-1].not_equal_witness(thisguy) + msg = "indent not equal e.g. " + format_witnesses(witness) + raise NannyNag(start[0], msg, line) + + if type == OP and token in ('{', '[', '('): + nesting_level = nesting_level + 1 + + elif type == OP and token in ('}', ']', ')'): + if nesting_level == 0: + raise NannyNag(start[0], + "unbalanced bracket '" + token + "'", + line) + nesting_level = nesting_level - 1 if __name__ == '__main__': main() |