Mercurial > public > mercurial-scm > hg-stable
annotate mercurial/fileset.py @ 14513:85fe676c27e9
fileset: fix long line
| author | Matt Mackall <mpm@selenic.com> |
|---|---|
| date | Thu, 02 Jun 2011 11:27:40 -0500 |
| parents | 30506b894359 |
| children | 68d814a3cefd |
| rev | line source |
|---|---|
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30506b894359
filesets: introduce basic fileset expression parser
Matt Mackall <mpm@selenic.com>
parents:
14509
diff
changeset
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1 # fileset.py - file set queries for mercurial |
| 11275 | 2 # |
| 3 # Copyright 2010 Matt Mackall <mpm@selenic.com> | |
| 4 # | |
| 5 # This software may be used and distributed according to the terms of the | |
| 6 # GNU General Public License version 2 or any later version. | |
| 7 | |
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filesets: introduce basic fileset expression parser
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8 import parser, error |
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help: extract items doc generation function
Patrick Mezard <pmezard@gmail.com>
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9 from i18n import _ |
| 11275 | 10 |
| 11 elements = { | |
| 12 "(": (20, ("group", 1, ")"), ("func", 1, ")")), | |
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revset: lower precedence of minus infix (issue2361)
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13 "-": (5, ("negate", 19), ("minus", 5)), |
| 11275 | 14 "not": (10, ("not", 10)), |
| 15 "!": (10, ("not", 10)), | |
| 16 "and": (5, None, ("and", 5)), | |
| 17 "&": (5, None, ("and", 5)), | |
| 18 "or": (4, None, ("or", 4)), | |
| 19 "|": (4, None, ("or", 4)), | |
| 20 "+": (4, None, ("or", 4)), | |
| 21 ",": (2, None, ("list", 2)), | |
| 22 ")": (0, None, None), | |
| 23 "symbol": (0, ("symbol",), None), | |
| 24 "string": (0, ("string",), None), | |
| 25 "end": (0, None, None), | |
| 26 } | |
| 27 | |
| 28 keywords = set(['and', 'or', 'not']) | |
| 29 | |
| 30 def tokenize(program): | |
| 31 pos, l = 0, len(program) | |
| 32 while pos < l: | |
| 33 c = program[pos] | |
| 34 if c.isspace(): # skip inter-token whitespace | |
| 35 pass | |
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14511
30506b894359
filesets: introduce basic fileset expression parser
Matt Mackall <mpm@selenic.com>
parents:
14509
diff
changeset
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36 elif c in "(),-|&+!": # handle simple operators |
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revset: raise ParseError exceptions
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37 yield (c, None, pos) |
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revset: support raw string literals
Brodie Rao <brodie@bitheap.org>
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38 elif (c in '"\'' or c == 'r' and |
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39 program[pos:pos + 2] in ("r'", 'r"')): # handle quoted strings |
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40 if c == 'r': |
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41 pos += 1 |
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42 c = program[pos] |
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43 decode = lambda x: x |
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44 else: |
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parents:
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45 decode = lambda x: x.decode('string-escape') |
| 11275 | 46 pos += 1 |
| 47 s = pos | |
| 48 while pos < l: # find closing quote | |
| 49 d = program[pos] | |
| 50 if d == '\\': # skip over escaped characters | |
| 51 pos += 2 | |
| 52 continue | |
| 53 if d == c: | |
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54 yield ('string', decode(program[s:pos]), s) |
| 11275 | 55 break |
| 56 pos += 1 | |
| 57 else: | |
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revset: all your error messages are belong to _
Martin Geisler <mg@lazybytes.net>
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58 raise error.ParseError(_("unterminated string"), s) |
| 14513 | 59 elif c.isalnum() or c in '.*{}[]?' or ord(c) > 127: |
| 60 # gather up a symbol/keyword | |
| 11275 | 61 s = pos |
| 62 pos += 1 | |
| 63 while pos < l: # find end of symbol | |
| 64 d = program[pos] | |
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14511
30506b894359
filesets: introduce basic fileset expression parser
Matt Mackall <mpm@selenic.com>
parents:
14509
diff
changeset
|
65 if not (d.isalnum() or d in ".*{}[]?," or ord(d) > 127): |
| 11275 | 66 break |
| 67 pos += 1 | |
| 68 sym = program[s:pos] | |
| 69 if sym in keywords: # operator keywords | |
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revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
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diff
changeset
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70 yield (sym, None, s) |
| 11275 | 71 else: |
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4215ce511134
revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
11284
diff
changeset
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72 yield ('symbol', sym, s) |
| 11275 | 73 pos -= 1 |
| 74 else: | |
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revset: all your error messages are belong to _
Martin Geisler <mg@lazybytes.net>
parents:
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75 raise error.ParseError(_("syntax error"), pos) |
| 11275 | 76 pos += 1 |
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revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
11284
diff
changeset
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77 yield ('end', None, pos) |
| 11275 | 78 |
| 79 parse = parser.parser(tokenize, elements).parse | |
| 80 |