Mercurial > hg
annotate mercurial/parser.py @ 29925:1619efcde9a4
manifest: make one use of _mancache avoid manifestctxs
In a future patch we will change manifestctx and treemanifestctx to no longer
derive from manifestdict and treemanifest, respectively. This means that
consumers of the _mancache will now need to be aware of the different between
the two, until we get rid of the manifest entirely and the _mancache becomes
only filled with ctxs.
This fixes one case of it that can be fixed by using the other cache. Future
patches will address the others uses using the upcoming manifestctx.read()
function.
author | Durham Goode <durham@fb.com> |
---|---|
date | Mon, 12 Sep 2016 14:29:09 -0700 |
parents | e5b794063fd4 |
children | 318a24b52eeb |
rev | line source |
---|---|
11274 | 1 # parser.py - simple top-down operator precedence parser for mercurial |
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 | |
11449
05af334bac05
parser: fix URL to effbot
Julian Cowley <julian@lava.net>
parents:
11412
diff
changeset
|
8 # see http://effbot.org/zone/simple-top-down-parsing.htm and |
11274 | 9 # http://eli.thegreenplace.net/2010/01/02/top-down-operator-precedence-parsing/ |
10 # for background | |
11 | |
12 # takes a tokenizer and elements | |
25655
b8b73652c1c9
parser: update documentation about tokenizer and elements
Yuya Nishihara <yuya@tcha.org>
parents:
25654
diff
changeset
|
13 # tokenizer is an iterator that returns (type, value, pos) tuples |
25815
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
14 # elements is a mapping of types to binding strength, primary, prefix, infix |
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
15 # and suffix actions |
11274 | 16 # an action is a tree node name, a tree label, and an optional match |
17500 | 17 # __call__(program) parses program into a labeled tree |
11274 | 18 |
25963
7448df709b2e
parser: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25818
diff
changeset
|
19 from __future__ import absolute_import |
7448df709b2e
parser: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25818
diff
changeset
|
20 |
7448df709b2e
parser: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25818
diff
changeset
|
21 from .i18n import _ |
7448df709b2e
parser: use absolute_import
Gregory Szorc <gregory.szorc@gmail.com>
parents:
25818
diff
changeset
|
22 from . import error |
11289
4215ce511134
revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
11278
diff
changeset
|
23 |
11274 | 24 class parser(object): |
25654
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
25 def __init__(self, elements, methods=None): |
11274 | 26 self._elements = elements |
27 self._methods = methods | |
13176
895f54a79c6e
templater: use the parser.py parser to extend the templater syntax
Matt Mackall <mpm@selenic.com>
parents:
11449
diff
changeset
|
28 self.current = None |
11274 | 29 def _advance(self): |
30 'advance the tokenizer' | |
31 t = self.current | |
25171
d647f97f88dd
parsers: use 'next' instead of try/except
Pierre-Yves David <pierre-yves.david@fb.com>
parents:
20778
diff
changeset
|
32 self.current = next(self._iter, None) |
11274 | 33 return t |
25804
f0a77cb6316a
parser: extract function that tests if next token may start new term
Yuya Nishihara <yuya@tcha.org>
parents:
25803
diff
changeset
|
34 def _hasnewterm(self): |
f0a77cb6316a
parser: extract function that tests if next token may start new term
Yuya Nishihara <yuya@tcha.org>
parents:
25803
diff
changeset
|
35 'True if next token may start new term' |
25815
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
36 return any(self._elements[self.current[0]][1:3]) |
25802
cc741c76b26a
parser: remove unused parameter 'pos' from _match()
Yuya Nishihara <yuya@tcha.org>
parents:
25801
diff
changeset
|
37 def _match(self, m): |
11274 | 38 'make sure the tokenizer matches an end condition' |
39 if self.current[0] != m: | |
14701
4b93bd041772
parsers: fix localization markup of parser errors
Mads Kiilerich <mads@kiilerich.com>
parents:
13665
diff
changeset
|
40 raise error.ParseError(_("unexpected token: %s") % self.current[0], |
11305
d4cafcb63f77
cleanups: undefined variables
Dirkjan Ochtman <dirkjan@ochtman.nl>
parents:
11289
diff
changeset
|
41 self.current[2]) |
11274 | 42 self._advance() |
25803
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
43 def _parseoperand(self, bind, m=None): |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
44 'gather right-hand-side operand until an end condition or binding met' |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
45 if m and self.current[0] == m: |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
46 expr = None |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
47 else: |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
48 expr = self._parse(bind) |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
49 if m: |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
50 self._match(m) |
b3004d273874
parser: factor out function that parses right-hand side of prefix/infix ops
Yuya Nishihara <yuya@tcha.org>
parents:
25802
diff
changeset
|
51 return expr |
11274 | 52 def _parse(self, bind=0): |
11289
4215ce511134
revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
11278
diff
changeset
|
53 token, value, pos = self._advance() |
25816
43a8a87fc175
parser: resolve ambiguity where both prefix and primary actions are defined
Yuya Nishihara <yuya@tcha.org>
parents:
25815
diff
changeset
|
54 # handle prefix rules on current token, take as primary if unambiguous |
25815
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
55 primary, prefix = self._elements[token][1:3] |
25816
43a8a87fc175
parser: resolve ambiguity where both prefix and primary actions are defined
Yuya Nishihara <yuya@tcha.org>
parents:
25815
diff
changeset
|
56 if primary and not (prefix and self._hasnewterm()): |
25815
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
57 expr = (primary, value) |
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
58 elif prefix: |
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
59 expr = (prefix[0], self._parseoperand(*prefix[1:])) |
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
60 else: |
14701
4b93bd041772
parsers: fix localization markup of parser errors
Mads Kiilerich <mads@kiilerich.com>
parents:
13665
diff
changeset
|
61 raise error.ParseError(_("not a prefix: %s") % token, pos) |
11274 | 62 # gather tokens until we meet a lower binding strength |
63 while bind < self._elements[self.current[0]][0]: | |
11289
4215ce511134
revset: raise ParseError exceptions
Matt Mackall <mpm@selenic.com>
parents:
11278
diff
changeset
|
64 token, value, pos = self._advance() |
25817
42ac9d1d1572
parser: reorder infix/suffix handling to be similar to prefix/primary flow
Yuya Nishihara <yuya@tcha.org>
parents:
25816
diff
changeset
|
65 # handle infix rules, take as suffix if unambiguous |
25815
e71e5629e006
parser: separate actions for primary expression and prefix operator
Yuya Nishihara <yuya@tcha.org>
parents:
25804
diff
changeset
|
66 infix, suffix = self._elements[token][3:] |
25818
455190fb4e51
parser: take suffix action if no infix action is defined
Yuya Nishihara <yuya@tcha.org>
parents:
25817
diff
changeset
|
67 if suffix and not (infix and self._hasnewterm()): |
29767
e5b794063fd4
parser: remove unused binding parameter from suffix action
Yuya Nishihara <yuya@tcha.org>
parents:
29059
diff
changeset
|
68 expr = (suffix, expr) |
25817
42ac9d1d1572
parser: reorder infix/suffix handling to be similar to prefix/primary flow
Yuya Nishihara <yuya@tcha.org>
parents:
25816
diff
changeset
|
69 elif infix: |
42ac9d1d1572
parser: reorder infix/suffix handling to be similar to prefix/primary flow
Yuya Nishihara <yuya@tcha.org>
parents:
25816
diff
changeset
|
70 expr = (infix[0], expr, self._parseoperand(*infix[1:])) |
11274 | 71 else: |
25817
42ac9d1d1572
parser: reorder infix/suffix handling to be similar to prefix/primary flow
Yuya Nishihara <yuya@tcha.org>
parents:
25816
diff
changeset
|
72 raise error.ParseError(_("not an infix: %s") % token, pos) |
11274 | 73 return expr |
25654
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
74 def parse(self, tokeniter): |
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
75 'generate a parse tree from tokens' |
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
76 self._iter = tokeniter |
13176
895f54a79c6e
templater: use the parser.py parser to extend the templater syntax
Matt Mackall <mpm@selenic.com>
parents:
11449
diff
changeset
|
77 self._advance() |
13665
e798e430c5e5
revset: report a parse error if a revset is not parsed completely (issue2654)
Bernhard Leiner <bleiner@gmail.com>
parents:
13176
diff
changeset
|
78 res = self._parse() |
e798e430c5e5
revset: report a parse error if a revset is not parsed completely (issue2654)
Bernhard Leiner <bleiner@gmail.com>
parents:
13176
diff
changeset
|
79 token, value, pos = self.current |
e798e430c5e5
revset: report a parse error if a revset is not parsed completely (issue2654)
Bernhard Leiner <bleiner@gmail.com>
parents:
13176
diff
changeset
|
80 return res, pos |
11274 | 81 def eval(self, tree): |
82 'recursively evaluate a parse tree using node methods' | |
83 if not isinstance(tree, tuple): | |
84 return tree | |
85 return self._methods[tree[0]](*[self.eval(t) for t in tree[1:]]) | |
25654
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
86 def __call__(self, tokeniter): |
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
87 'parse tokens into a parse tree and evaluate if methods given' |
af329a84310c
parser: accept iterator of tokens instead of tokenizer function and program
Yuya Nishihara <yuya@tcha.org>
parents:
25306
diff
changeset
|
88 t = self.parse(tokeniter) |
11274 | 89 if self._methods: |
90 return self.eval(t) | |
91 return t | |
25253
3f1a9b44b8c2
parser: move prettyformat() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
25171
diff
changeset
|
92 |
25705
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
93 def buildargsdict(trees, funcname, keys, keyvaluenode, keynode): |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
94 """Build dict from list containing positional and keyword arguments |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
95 |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
96 Invalid keywords or too many positional arguments are rejected, but |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
97 missing arguments are just omitted. |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
98 """ |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
99 if len(trees) > len(keys): |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
100 raise error.ParseError(_("%(func)s takes at most %(nargs)d arguments") |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
101 % {'func': funcname, 'nargs': len(keys)}) |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
102 args = {} |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
103 # consume positional arguments |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
104 for k, x in zip(keys, trees): |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
105 if x[0] == keyvaluenode: |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
106 break |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
107 args[k] = x |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
108 # remainder should be keyword arguments |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
109 for x in trees[len(args):]: |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
110 if x[0] != keyvaluenode or x[1][0] != keynode: |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
111 raise error.ParseError(_("%(func)s got an invalid argument") |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
112 % {'func': funcname}) |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
113 k = x[1][1] |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
114 if k not in keys: |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
115 raise error.ParseError(_("%(func)s got an unexpected keyword " |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
116 "argument '%(key)s'") |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
117 % {'func': funcname, 'key': k}) |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
118 if k in args: |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
119 raise error.ParseError(_("%(func)s got multiple values for keyword " |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
120 "argument '%(key)s'") |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
121 % {'func': funcname, 'key': k}) |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
122 args[k] = x[2] |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
123 return args |
48919d246a47
revset: add function to build dict of positional and keyword arguments
Yuya Nishihara <yuya@tcha.org>
parents:
25655
diff
changeset
|
124 |
26231
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
125 def unescapestr(s): |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
126 try: |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
127 return s.decode("string_escape") |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
128 except ValueError as e: |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
129 # mangle Python's exception into our format |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
130 raise error.ParseError(str(e).lower()) |
87c9c562c37a
parser: move unescape helper from templater
Yuya Nishihara <yuya@tcha.org>
parents:
25963
diff
changeset
|
131 |
25254
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
132 def _prettyformat(tree, leafnodes, level, lines): |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
133 if not isinstance(tree, tuple) or tree[0] in leafnodes: |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
134 lines.append((level, str(tree))) |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
135 else: |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
136 lines.append((level, '(%s' % tree[0])) |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
137 for s in tree[1:]: |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
138 _prettyformat(s, leafnodes, level + 1, lines) |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
139 lines[-1:] = [(lines[-1][0], lines[-1][1] + ')')] |
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
140 |
25253
3f1a9b44b8c2
parser: move prettyformat() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
25171
diff
changeset
|
141 def prettyformat(tree, leafnodes): |
3f1a9b44b8c2
parser: move prettyformat() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
25171
diff
changeset
|
142 lines = [] |
25254
060bdfef2517
parser: extract closure of prettyformat() to a top-level function
Yuya Nishihara <yuya@tcha.org>
parents:
25253
diff
changeset
|
143 _prettyformat(tree, leafnodes, 0, lines) |
25253
3f1a9b44b8c2
parser: move prettyformat() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
25171
diff
changeset
|
144 output = '\n'.join((' ' * l + s) for l, s in lines) |
3f1a9b44b8c2
parser: move prettyformat() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
25171
diff
changeset
|
145 return output |
25306
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
146 |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
147 def simplifyinfixops(tree, targetnodes): |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
148 """Flatten chained infix operations to reduce usage of Python stack |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
149 |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
150 >>> def f(tree): |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
151 ... print prettyformat(simplifyinfixops(tree, ('or',)), ('symbol',)) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
152 >>> f(('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
153 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
154 ... ('symbol', '1'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
155 ... ('symbol', '2')), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
156 ... ('symbol', '3'))) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
157 (or |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
158 ('symbol', '1') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
159 ('symbol', '2') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
160 ('symbol', '3')) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
161 >>> f(('func', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
162 ... ('symbol', 'p1'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
163 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
164 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
165 ... ('func', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
166 ... ('symbol', 'sort'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
167 ... ('list', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
168 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
169 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
170 ... ('symbol', '1'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
171 ... ('symbol', '2')), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
172 ... ('symbol', '3')), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
173 ... ('negate', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
174 ... ('symbol', 'rev')))), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
175 ... ('and', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
176 ... ('symbol', '4'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
177 ... ('group', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
178 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
179 ... ('or', |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
180 ... ('symbol', '5'), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
181 ... ('symbol', '6')), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
182 ... ('symbol', '7'))))), |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
183 ... ('symbol', '8')))) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
184 (func |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
185 ('symbol', 'p1') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
186 (or |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
187 (func |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
188 ('symbol', 'sort') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
189 (list |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
190 (or |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
191 ('symbol', '1') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
192 ('symbol', '2') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
193 ('symbol', '3')) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
194 (negate |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
195 ('symbol', 'rev')))) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
196 (and |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
197 ('symbol', '4') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
198 (group |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
199 (or |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
200 ('symbol', '5') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
201 ('symbol', '6') |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
202 ('symbol', '7')))) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
203 ('symbol', '8'))) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
204 """ |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
205 if not isinstance(tree, tuple): |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
206 return tree |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
207 op = tree[0] |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
208 if op not in targetnodes: |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
209 return (op,) + tuple(simplifyinfixops(x, targetnodes) for x in tree[1:]) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
210 |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
211 # walk down left nodes taking each right node. no recursion to left nodes |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
212 # because infix operators are left-associative, i.e. left tree is deep. |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
213 # e.g. '1 + 2 + 3' -> (+ (+ 1 2) 3) -> (+ 1 2 3) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
214 simplified = [] |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
215 x = tree |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
216 while x[0] == op: |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
217 l, r = x[1:] |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
218 simplified.append(simplifyinfixops(r, targetnodes)) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
219 x = l |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
220 simplified.append(simplifyinfixops(x, targetnodes)) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
221 simplified.append(op) |
c87b05925054
parser: add helper to reduce nesting of chained infix operations
Yuya Nishihara <yuya@tcha.org>
parents:
25254
diff
changeset
|
222 return tuple(reversed(simplified)) |
28720
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
223 |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
224 def parseerrordetail(inst): |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
225 """Compose error message from specified ParseError object |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
226 """ |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
227 if len(inst.args) > 1: |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
228 return _('at %s: %s') % (inst.args[1], inst.args[0]) |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
229 else: |
639e0f1e8ffa
parser: move parsererrordetail() function from revset module
Yuya Nishihara <yuya@tcha.org>
parents:
26231
diff
changeset
|
230 return inst.args[0] |
28870
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
231 |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
232 class alias(object): |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
233 """Parsed result of alias""" |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
234 |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
235 def __init__(self, name, args, err, replacement): |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
236 self.name = name |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
237 self.args = args |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
238 self.error = err |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
239 self.replacement = replacement |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
240 # whether own `error` information is already shown or not. |
28898
8d398155bfda
revset: rename findaliases() to expandaliases()
Yuya Nishihara <yuya@tcha.org>
parents:
28897
diff
changeset
|
241 # this avoids showing same warning multiple times at each |
8d398155bfda
revset: rename findaliases() to expandaliases()
Yuya Nishihara <yuya@tcha.org>
parents:
28897
diff
changeset
|
242 # `expandaliases`. |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
243 self.warned = False |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
244 |
28870
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
245 class basealiasrules(object): |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
246 """Parsing and expansion rule set of aliases |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
247 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
248 This is a helper for fileset/revset/template aliases. A concrete rule set |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
249 should be made by sub-classing this and implementing class/static methods. |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
250 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
251 It supports alias expansion of symbol and funciton-call styles:: |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
252 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
253 # decl = defn |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
254 h = heads(default) |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
255 b($1) = ancestors($1) - ancestors(default) |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
256 """ |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
257 # typically a config section, which will be included in error messages |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
258 _section = None |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
259 # tag of symbol node |
28870
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
260 _symbolnode = 'symbol' |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
261 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
262 def __new__(cls): |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
263 raise TypeError("'%s' is not instantiatable" % cls.__name__) |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
264 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
265 @staticmethod |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
266 def _parse(spec): |
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
267 """Parse an alias name, arguments and definition""" |
28870
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
268 raise NotImplementedError |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
269 |
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
270 @staticmethod |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
271 def _trygetfunc(tree): |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
272 """Return (name, args) if tree is a function; otherwise None""" |
28870
475dad3432fd
parser: add stub class that will host alias parsing and expansion
Yuya Nishihara <yuya@tcha.org>
parents:
28720
diff
changeset
|
273 raise NotImplementedError |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
274 |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
275 @classmethod |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
276 def _builddecl(cls, decl): |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
277 """Parse an alias declaration into ``(name, args, errorstr)`` |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
278 |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
279 This function analyzes the parsed tree. The parsing rule is provided |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
280 by ``_parse()``. |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
281 |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
282 - ``name``: of declared alias (may be ``decl`` itself at error) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
283 - ``args``: list of argument names (or None for symbol declaration) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
284 - ``errorstr``: detail about detected error (or None) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
285 |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
286 >>> sym = lambda x: ('symbol', x) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
287 >>> symlist = lambda *xs: ('list',) + tuple(sym(x) for x in xs) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
288 >>> func = lambda n, a: ('func', sym(n), a) |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
289 >>> parsemap = { |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
290 ... 'foo': sym('foo'), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
291 ... '$foo': sym('$foo'), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
292 ... 'foo::bar': ('dagrange', sym('foo'), sym('bar')), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
293 ... 'foo()': func('foo', None), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
294 ... '$foo()': func('$foo', None), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
295 ... 'foo($1, $2)': func('foo', symlist('$1', '$2')), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
296 ... 'foo(bar_bar, baz.baz)': |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
297 ... func('foo', symlist('bar_bar', 'baz.baz')), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
298 ... 'foo(bar($1, $2))': |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
299 ... func('foo', func('bar', symlist('$1', '$2'))), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
300 ... 'foo($1, $2, nested($1, $2))': |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
301 ... func('foo', (symlist('$1', '$2') + |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
302 ... (func('nested', symlist('$1', '$2')),))), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
303 ... 'foo("bar")': func('foo', ('string', 'bar')), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
304 ... 'foo($1, $2': error.ParseError('unexpected token: end', 10), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
305 ... 'foo("bar': error.ParseError('unterminated string', 5), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
306 ... 'foo($1, $2, $1)': func('foo', symlist('$1', '$2', '$1')), |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
307 ... } |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
308 >>> def parse(expr): |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
309 ... x = parsemap[expr] |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
310 ... if isinstance(x, Exception): |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
311 ... raise x |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
312 ... return x |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
313 >>> def trygetfunc(tree): |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
314 ... if not tree or tree[0] != 'func' or tree[1][0] != 'symbol': |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
315 ... return None |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
316 ... if not tree[2]: |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
317 ... return tree[1][1], [] |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
318 ... if tree[2][0] == 'list': |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
319 ... return tree[1][1], list(tree[2][1:]) |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
320 ... return tree[1][1], [tree[2]] |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
321 >>> class aliasrules(basealiasrules): |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
322 ... _parse = staticmethod(parse) |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
323 ... _trygetfunc = staticmethod(trygetfunc) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
324 >>> builddecl = aliasrules._builddecl |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
325 >>> builddecl('foo') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
326 ('foo', None, None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
327 >>> builddecl('$foo') |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
328 ('$foo', None, "invalid symbol '$foo'") |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
329 >>> builddecl('foo::bar') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
330 ('foo::bar', None, 'invalid format') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
331 >>> builddecl('foo()') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
332 ('foo', [], None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
333 >>> builddecl('$foo()') |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
334 ('$foo()', None, "invalid function '$foo'") |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
335 >>> builddecl('foo($1, $2)') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
336 ('foo', ['$1', '$2'], None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
337 >>> builddecl('foo(bar_bar, baz.baz)') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
338 ('foo', ['bar_bar', 'baz.baz'], None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
339 >>> builddecl('foo($1, $2, nested($1, $2))') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
340 ('foo($1, $2, nested($1, $2))', None, 'invalid argument list') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
341 >>> builddecl('foo(bar($1, $2))') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
342 ('foo(bar($1, $2))', None, 'invalid argument list') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
343 >>> builddecl('foo("bar")') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
344 ('foo("bar")', None, 'invalid argument list') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
345 >>> builddecl('foo($1, $2') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
346 ('foo($1, $2', None, 'at 10: unexpected token: end') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
347 >>> builddecl('foo("bar') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
348 ('foo("bar', None, 'at 5: unterminated string') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
349 >>> builddecl('foo($1, $2, $1)') |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
350 ('foo', None, 'argument names collide with each other') |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
351 """ |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
352 try: |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
353 tree = cls._parse(decl) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
354 except error.ParseError as inst: |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
355 return (decl, None, parseerrordetail(inst)) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
356 |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
357 if tree[0] == cls._symbolnode: |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
358 # "name = ...." style |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
359 name = tree[1] |
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
360 if name.startswith('$'): |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
361 return (decl, None, _("invalid symbol '%s'") % name) |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
362 return (name, None, None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
363 |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
364 func = cls._trygetfunc(tree) |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
365 if func: |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
366 # "name(arg, ....) = ...." style |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
367 name, args = func |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
368 if name.startswith('$'): |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
369 return (decl, None, _("invalid function '%s'") % name) |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
370 if any(t[0] != cls._symbolnode for t in args): |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
371 return (decl, None, _("invalid argument list")) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
372 if len(args) != len(set(args)): |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
373 return (name, None, _("argument names collide with each other")) |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
374 return (name, [t[1] for t in args], None) |
28871
6d6201fc5aae
parser: move alias declaration parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28870
diff
changeset
|
375 |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
376 return (decl, None, _("invalid format")) |
28872
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
377 |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
378 @classmethod |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
379 def _relabelargs(cls, tree, args): |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
380 """Mark alias arguments as ``_aliasarg``""" |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
381 if not isinstance(tree, tuple): |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
382 return tree |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
383 op = tree[0] |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
384 if op != cls._symbolnode: |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
385 return (op,) + tuple(cls._relabelargs(x, args) for x in tree[1:]) |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
386 |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
387 assert len(tree) == 2 |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
388 sym = tree[1] |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
389 if sym in args: |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
390 op = '_aliasarg' |
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
391 elif sym.startswith('$'): |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
392 raise error.ParseError(_("invalid symbol '%s'") % sym) |
28872
5f31d2248745
parser: move _relabelaliasargs() to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28871
diff
changeset
|
393 return (op, sym) |
28873
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
394 |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
395 @classmethod |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
396 def _builddefn(cls, defn, args): |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
397 """Parse an alias definition into a tree and marks substitutions |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
398 |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
399 This function marks alias argument references as ``_aliasarg``. The |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
400 parsing rule is provided by ``_parse()``. |
28873
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
401 |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
402 ``args`` is a list of alias argument names, or None if the alias |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
403 is declared as a symbol. |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
404 |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
405 >>> parsemap = { |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
406 ... '$1 or foo': ('or', ('symbol', '$1'), ('symbol', 'foo')), |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
407 ... '$1 or $bar': ('or', ('symbol', '$1'), ('symbol', '$bar')), |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
408 ... '$10 or baz': ('or', ('symbol', '$10'), ('symbol', 'baz')), |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
409 ... '"$1" or "foo"': ('or', ('string', '$1'), ('string', 'foo')), |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
410 ... } |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
411 >>> class aliasrules(basealiasrules): |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
412 ... _parse = staticmethod(parsemap.__getitem__) |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
413 ... _trygetfunc = staticmethod(lambda x: None) |
28873
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
414 >>> builddefn = aliasrules._builddefn |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
415 >>> def pprint(tree): |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
416 ... print prettyformat(tree, ('_aliasarg', 'string', 'symbol')) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
417 >>> args = ['$1', '$2', 'foo'] |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
418 >>> pprint(builddefn('$1 or foo', args)) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
419 (or |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
420 ('_aliasarg', '$1') |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
421 ('_aliasarg', 'foo')) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
422 >>> try: |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
423 ... builddefn('$1 or $bar', args) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
424 ... except error.ParseError as inst: |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
425 ... print parseerrordetail(inst) |
29058
dbed4c4f48ae
parser: rephrase "'$' not for alias arguments" message
Yuya Nishihara <yuya@tcha.org>
parents:
28910
diff
changeset
|
426 invalid symbol '$bar' |
28873
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
427 >>> args = ['$1', '$10', 'foo'] |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
428 >>> pprint(builddefn('$10 or baz', args)) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
429 (or |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
430 ('_aliasarg', '$10') |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
431 ('symbol', 'baz')) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
432 >>> pprint(builddefn('"$1" or "foo"', args)) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
433 (or |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
434 ('string', '$1') |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
435 ('string', 'foo')) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
436 """ |
28875
2e9f5453ab5a
parser: unify parser function of alias declaration and definition
Yuya Nishihara <yuya@tcha.org>
parents:
28873
diff
changeset
|
437 tree = cls._parse(defn) |
28873
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
438 if args: |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
439 args = set(args) |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
440 else: |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
441 args = set() |
2ca3b7c563f3
parser: move alias definition parser to common rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28872
diff
changeset
|
442 return cls._relabelargs(tree, args) |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
443 |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
444 @classmethod |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
445 def build(cls, decl, defn): |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
446 """Parse an alias declaration and definition into an alias object""" |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
447 repl = efmt = None |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
448 name, args, err = cls._builddecl(decl) |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
449 if err: |
29059
8eba4cdcfd81
parser: shorten prefix of alias parsing errors
Yuya Nishihara <yuya@tcha.org>
parents:
29058
diff
changeset
|
450 efmt = _('bad declaration of %(section)s "%(name)s": %(error)s') |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
451 else: |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
452 try: |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
453 repl = cls._builddefn(defn, args) |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
454 except error.ParseError as inst: |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
455 err = parseerrordetail(inst) |
29059
8eba4cdcfd81
parser: shorten prefix of alias parsing errors
Yuya Nishihara <yuya@tcha.org>
parents:
29058
diff
changeset
|
456 efmt = _('bad definition of %(section)s "%(name)s": %(error)s') |
28892
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
457 if err: |
0c135f37c6f8
parser: construct alias object by rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28875
diff
changeset
|
458 err = efmt % {'section': cls._section, 'name': name, 'error': err} |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
459 return alias(name, args, err, repl) |
28893
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
460 |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
461 @classmethod |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
462 def buildmap(cls, items): |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
463 """Parse a list of alias (name, replacement) pairs into a dict of |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
464 alias objects""" |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
465 aliases = {} |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
466 for decl, defn in items: |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
467 a = cls.build(decl, defn) |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
468 aliases[a.name] = a |
ee11167fe1da
parser: extract helper that creates a dict of aliases
Yuya Nishihara <yuya@tcha.org>
parents:
28892
diff
changeset
|
469 return aliases |
28895
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
470 |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
471 @classmethod |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
472 def _getalias(cls, aliases, tree): |
28909
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
473 """If tree looks like an unexpanded alias, return (alias, pattern-args) |
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
474 pair. Return None otherwise. |
28895
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
475 """ |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
476 if not isinstance(tree, tuple): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
477 return None |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
478 if tree[0] == cls._symbolnode: |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
479 name = tree[1] |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
480 a = aliases.get(name) |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
481 if a and a.args is None: |
28909
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
482 return a, None |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
483 func = cls._trygetfunc(tree) |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
484 if func: |
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
485 name, args = func |
28895
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
486 a = aliases.get(name) |
28908
7a772deffa12
parser: drop redundant comparison between alias declaration tree and pattern
Yuya Nishihara <yuya@tcha.org>
parents:
28898
diff
changeset
|
487 if a and a.args is not None: |
28910
1203159c8928
parser: factor out _trygetfunc() that extracts function name and arguments
Yuya Nishihara <yuya@tcha.org>
parents:
28909
diff
changeset
|
488 return a, args |
28895
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
489 return None |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
490 |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
491 @classmethod |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
492 def _expandargs(cls, tree, args): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
493 """Replace _aliasarg instances with the substitution value of the |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
494 same name in args, recursively. |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
495 """ |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
496 if not isinstance(tree, tuple): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
497 return tree |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
498 if tree[0] == '_aliasarg': |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
499 sym = tree[1] |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
500 return args[sym] |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
501 return tuple(cls._expandargs(t, args) for t in tree) |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
502 |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
503 @classmethod |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
504 def _expand(cls, aliases, tree, expanding, cache): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
505 if not isinstance(tree, tuple): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
506 return tree |
28909
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
507 r = cls._getalias(aliases, tree) |
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
508 if r is None: |
28896
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
509 return tuple(cls._expand(aliases, t, expanding, cache) |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
510 for t in tree) |
28909
edbffdc7f6a0
parser: make _getalias() return (alias, pattern-args) pair
Yuya Nishihara <yuya@tcha.org>
parents:
28908
diff
changeset
|
511 a, l = r |
28896
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
512 if a.error: |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
513 raise error.Abort(a.error) |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
514 if a in expanding: |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
515 raise error.ParseError(_('infinite expansion of %(section)s ' |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
516 '"%(name)s" detected') |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
517 % {'section': cls._section, 'name': a.name}) |
28897
c1f254138f44
parser: add short comment how aliases are expanded in phases
Yuya Nishihara <yuya@tcha.org>
parents:
28896
diff
changeset
|
518 # get cacheable replacement tree by expanding aliases recursively |
28896
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
519 expanding.append(a) |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
520 if a.name not in cache: |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
521 cache[a.name] = cls._expand(aliases, a.replacement, expanding, |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
522 cache) |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
523 result = cache[a.name] |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
524 expanding.pop() |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
525 if a.args is None: |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
526 return result |
28897
c1f254138f44
parser: add short comment how aliases are expanded in phases
Yuya Nishihara <yuya@tcha.org>
parents:
28896
diff
changeset
|
527 # substitute function arguments in replacement tree |
28896
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
528 if len(l) != len(a.args): |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
529 raise error.ParseError(_('invalid number of arguments: %d') |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
530 % len(l)) |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
531 l = [cls._expand(aliases, t, [], cache) for t in l] |
4c76a032ec7e
parser: reorder alias expansion routine to return early
Yuya Nishihara <yuya@tcha.org>
parents:
28895
diff
changeset
|
532 return cls._expandargs(result, dict(zip(a.args, l))) |
28895
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
533 |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
534 @classmethod |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
535 def expand(cls, aliases, tree): |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
536 """Expand aliases in tree, recursively. |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
537 |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
538 'aliases' is a dictionary mapping user defined aliases to alias objects. |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
539 """ |
4bf9ed7a260e
parser: move functions that process alias expansion to rule-set class
Yuya Nishihara <yuya@tcha.org>
parents:
28893
diff
changeset
|
540 return cls._expand(aliases, tree, [], {}) |