Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 1 | # -*- coding: utf-8 -*- |
| 2 | """ |
| 3 | jinja2.parser |
| 4 | ~~~~~~~~~~~~~ |
| 5 | |
| 6 | Implements the template parser. |
| 7 | |
| 8 | :copyright: 2008 by Armin Ronacher. |
| 9 | :license: BSD, see LICENSE for more details. |
| 10 | """ |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 11 | from jinja2 import nodes |
| 12 | from jinja2.exceptions import TemplateSyntaxError |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 13 | |
| 14 | |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 15 | _statement_keywords = frozenset(['for', 'if', 'block', 'extends', 'print', |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 16 | 'macro', 'include', 'from', 'import']) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 17 | _compare_operators = frozenset(['eq', 'ne', 'lt', 'lteq', 'gt', 'gteq']) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 18 | |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 19 | |
| 20 | class Parser(object): |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 21 | """This is the central parsing class Jinja2 uses. It's passed to |
| 22 | extensions and can be used to parse expressions or statements. |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 23 | """ |
| 24 | |
| 25 | def __init__(self, environment, source, filename=None): |
| 26 | self.environment = environment |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 27 | if isinstance(filename, unicode): |
| 28 | filename = filename.encode('utf-8') |
Armin Ronacher | bf7c4ad | 2008-04-12 12:02:36 +0200 | [diff] [blame] | 29 | self.source = unicode(source) |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 30 | self.filename = filename |
| 31 | self.closed = False |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 32 | self.stream = environment.lexer.tokenize(self.source, filename) |
Armin Ronacher | 0553093 | 2008-04-20 13:27:49 +0200 | [diff] [blame] | 33 | self.extensions = {} |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 34 | for extension in environment.extensions.itervalues(): |
Armin Ronacher | 0553093 | 2008-04-20 13:27:49 +0200 | [diff] [blame] | 35 | for tag in extension.tags: |
| 36 | self.extensions[tag] = extension.parse |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 37 | self._last_identifier = 0 |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 38 | |
| 39 | def is_tuple_end(self): |
| 40 | """Are we at the end of a tuple?""" |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 41 | return self.stream.current.type in ('variable_end', 'block_end', |
| 42 | 'rparen') or \ |
| 43 | self.stream.current.test('name:in') |
| 44 | |
Armin Ronacher | 762079c | 2008-05-08 23:57:56 +0200 | [diff] [blame] | 45 | def skip_colon(self): |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 46 | """If there is a colon, skip it and return `True`, else `False`.""" |
| 47 | if self.stream.current.type is 'colon': |
| 48 | self.stream.next() |
| 49 | return True |
| 50 | return False |
| 51 | |
Armin Ronacher | 762079c | 2008-05-08 23:57:56 +0200 | [diff] [blame] | 52 | def skip_comma(self): |
| 53 | """If there is a comma, skip it and return `True`, else `False`.""" |
| 54 | if self.stream.current.type is 'comma': |
| 55 | self.stream.next() |
| 56 | return True |
| 57 | return False |
| 58 | |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 59 | def free_identifier(self, lineno=None): |
| 60 | """Return a new free identifier as :class:`~jinja2.nodes.InternalName`.""" |
| 61 | self._last_identifier += 1 |
| 62 | rv = object.__new__(nodes.InternalName) |
| 63 | nodes.Node.__init__(rv, 'fi%d' % self._last_identifier, lineno=lineno) |
| 64 | return rv |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 65 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 66 | def parse_statement(self): |
| 67 | """Parse a single statement.""" |
| 68 | token_type = self.stream.current.type |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 69 | if self.stream.current.type is 'name': |
| 70 | if self.stream.current.value in _statement_keywords: |
| 71 | return getattr(self, 'parse_' + self.stream.current.value)() |
| 72 | elif self.stream.current.value == 'call': |
| 73 | return self.parse_call_block() |
| 74 | elif self.stream.current.value == 'filter': |
| 75 | return self.parse_filter_block() |
| 76 | else: |
| 77 | ext = self.extensions.get(self.stream.current.value) |
| 78 | if ext is not None: |
| 79 | return ext(self) |
Armin Ronacher | 157531b | 2008-04-28 16:14:03 +0200 | [diff] [blame] | 80 | lineno = self.stream.current.lineno |
Armin Ronacher | 8efc522 | 2008-04-08 14:47:40 +0200 | [diff] [blame] | 81 | expr = self.parse_tuple() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 82 | if self.stream.current.type == 'assign': |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 83 | result = self.parse_assign(expr) |
| 84 | else: |
| 85 | result = nodes.ExprStmt(expr, lineno=lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 86 | return result |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 87 | |
| 88 | def parse_assign(self, target): |
| 89 | """Parse an assign statement.""" |
| 90 | lineno = self.stream.expect('assign').lineno |
| 91 | if not target.can_assign(): |
| 92 | raise TemplateSyntaxError("can't assign to '%s'" % |
Armin Ronacher | 4f7d2d5 | 2008-04-22 10:40:26 +0200 | [diff] [blame] | 93 | target.__class__.__name__.lower(), |
| 94 | target.lineno, self.filename) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 95 | expr = self.parse_tuple() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 96 | target.set_ctx('store') |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 97 | return nodes.Assign(target, expr, lineno=lineno) |
| 98 | |
| 99 | def parse_statements(self, end_tokens, drop_needle=False): |
Armin Ronacher | f59bac2 | 2008-04-20 13:11:43 +0200 | [diff] [blame] | 100 | """Parse multiple statements into a list until one of the end tokens |
| 101 | is reached. This is used to parse the body of statements as it also |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 102 | parses template data if appropriate. The parser checks first if the |
| 103 | current token is a colon and skips it if there is one. Then it checks |
| 104 | for the block end and parses until if one of the `end_tokens` is |
| 105 | reached. Per default the active token in the stream at the end of |
| 106 | the call is the matched end token. If this is not wanted `drop_needle` |
| 107 | can be set to `True` and the end token is removed. |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 108 | """ |
| 109 | # the first token may be a colon for python compatibility |
Armin Ronacher | 762079c | 2008-05-08 23:57:56 +0200 | [diff] [blame] | 110 | self.skip_colon() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 111 | |
Armin Ronacher | 2b60fe5 | 2008-04-21 08:23:59 +0200 | [diff] [blame] | 112 | # in the future it would be possible to add whole code sections |
| 113 | # by adding some sort of end of statement token and parsing those here. |
| 114 | self.stream.expect('block_end') |
| 115 | result = self.subparse(end_tokens) |
| 116 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 117 | if drop_needle: |
| 118 | self.stream.next() |
| 119 | return result |
| 120 | |
| 121 | def parse_for(self): |
| 122 | """Parse a for loop.""" |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 123 | lineno = self.stream.expect('name:for').lineno |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 124 | target = self.parse_tuple(simplified=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 125 | if not target.can_assign(): |
| 126 | raise TemplateSyntaxError("can't assign to '%s'" % |
Armin Ronacher | 4f7d2d5 | 2008-04-22 10:40:26 +0200 | [diff] [blame] | 127 | target.__class__.__name__.lower(), |
| 128 | target.lineno, self.filename) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 129 | target.set_ctx('store') |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 130 | self.stream.expect('name:in') |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 131 | iter = self.parse_tuple(no_condexpr=True) |
| 132 | test = None |
Armin Ronacher | c072564 | 2008-05-04 22:43:19 +0200 | [diff] [blame] | 133 | if self.stream.current.test('name:if'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 134 | self.stream.next() |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 135 | test = self.parse_expression() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 136 | body = self.parse_statements(('name:endfor', 'name:else')) |
| 137 | if self.stream.next().value == 'endfor': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 138 | else_ = [] |
| 139 | else: |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 140 | else_ = self.parse_statements(('name:endfor',), drop_needle=True) |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 141 | return nodes.For(target, iter, body, else_, test, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 142 | |
| 143 | def parse_if(self): |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 144 | """Parse an if construct.""" |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 145 | node = result = nodes.If(lineno=self.stream.expect('name:if').lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 146 | while 1: |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 147 | node.test = self.parse_tuple(no_condexpr=True) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 148 | node.body = self.parse_statements(('name:elif', 'name:else', |
| 149 | 'name:endif')) |
| 150 | token = self.stream.next() |
| 151 | if token.test('name:elif'): |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 152 | new_node = nodes.If(lineno=self.stream.current.lineno) |
| 153 | node.else_ = [new_node] |
| 154 | node = new_node |
| 155 | continue |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 156 | elif token.test('name:else'): |
| 157 | node.else_ = self.parse_statements(('name:endif',), |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 158 | drop_needle=True) |
| 159 | else: |
| 160 | node.else_ = [] |
| 161 | break |
| 162 | return result |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 163 | |
| 164 | def parse_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 165 | node = nodes.Block(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 166 | node.name = self.stream.expect('name').value |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 167 | node.body = self.parse_statements(('name:endblock',), drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 168 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 169 | |
| 170 | def parse_extends(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 171 | node = nodes.Extends(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 172 | node.template = self.parse_expression() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 173 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 174 | |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 175 | def parse_import_context(self, node, default): |
Armin Ronacher | cda43df | 2008-05-03 17:10:05 +0200 | [diff] [blame] | 176 | if self.stream.current.test_any('name:with', 'name:without') and \ |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 177 | self.stream.look().test('name:context'): |
| 178 | node.with_context = self.stream.next().value == 'with' |
| 179 | self.stream.skip() |
| 180 | else: |
| 181 | node.with_context = default |
| 182 | return node |
| 183 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 184 | def parse_include(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 185 | node = nodes.Include(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 186 | node.template = self.parse_expression() |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 187 | return self.parse_import_context(node, True) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 188 | |
| 189 | def parse_import(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 190 | node = nodes.Import(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 191 | node.template = self.parse_expression() |
| 192 | self.stream.expect('name:as') |
| 193 | node.target = self.stream.expect('name').value |
| 194 | if not nodes.Name(node.target, 'store').can_assign(): |
| 195 | raise TemplateSyntaxError('can\'t assign imported template ' |
| 196 | 'to %r' % node.target, node.lineno, |
| 197 | self.filename) |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 198 | return self.parse_import_context(node, False) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 199 | |
| 200 | def parse_from(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 201 | node = nodes.FromImport(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 202 | node.template = self.parse_expression() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 203 | self.stream.expect('name:import') |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 204 | node.names = [] |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 205 | |
| 206 | def parse_context(): |
| 207 | if self.stream.current.value in ('with', 'without') and \ |
| 208 | self.stream.look().test('name:context'): |
| 209 | node.with_context = self.stream.next().value == 'with' |
| 210 | self.stream.skip() |
| 211 | return True |
| 212 | return False |
| 213 | |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 214 | while 1: |
| 215 | if node.names: |
| 216 | self.stream.expect('comma') |
| 217 | if self.stream.current.type is 'name': |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 218 | if parse_context(): |
| 219 | break |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 220 | target = nodes.Name(self.stream.current.value, 'store') |
| 221 | if not target.can_assign(): |
| 222 | raise TemplateSyntaxError('can\'t import object named %r' |
| 223 | % target.name, target.lineno, |
| 224 | self.filename) |
| 225 | elif target.name.startswith('__'): |
| 226 | raise TemplateAssertionError('names starting with two ' |
| 227 | 'underscores can not be ' |
| 228 | 'imported', target.lineno, |
| 229 | self.filename) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 230 | self.stream.next() |
Armin Ronacher | 2feed1d | 2008-04-26 16:26:52 +0200 | [diff] [blame] | 231 | if self.stream.current.test('name:as'): |
| 232 | self.stream.next() |
| 233 | alias = self.stream.expect('name') |
| 234 | if not nodes.Name(alias.value, 'store').can_assign(): |
| 235 | raise TemplateSyntaxError('can\'t name imported ' |
| 236 | 'object %r.' % alias.value, |
| 237 | alias.lineno, self.filename) |
| 238 | node.names.append((target.name, alias.value)) |
| 239 | else: |
| 240 | node.names.append(target.name) |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 241 | if parse_context() or self.stream.current.type is not 'comma': |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 242 | break |
| 243 | else: |
| 244 | break |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 245 | if not hasattr(node, 'with_context'): |
| 246 | node.with_context = False |
| 247 | if self.stream.current.type is 'comma': |
| 248 | self.stream.next() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 249 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 250 | |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 251 | def parse_signature(self, node): |
| 252 | node.args = args = [] |
| 253 | node.defaults = defaults = [] |
| 254 | self.stream.expect('lparen') |
| 255 | while self.stream.current.type is not 'rparen': |
| 256 | if args: |
| 257 | self.stream.expect('comma') |
| 258 | token = self.stream.expect('name') |
| 259 | arg = nodes.Name(token.value, 'param', lineno=token.lineno) |
| 260 | if not arg.can_assign(): |
| 261 | raise TemplateSyntaxError("can't assign to '%s'" % |
| 262 | arg.name, arg.lineno, |
| 263 | self.filename) |
| 264 | if self.stream.current.type is 'assign': |
| 265 | self.stream.next() |
| 266 | defaults.append(self.parse_expression()) |
| 267 | args.append(arg) |
| 268 | self.stream.expect('rparen') |
| 269 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 270 | def parse_call_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 271 | node = nodes.CallBlock(lineno=self.stream.next().lineno) |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 272 | if self.stream.current.type is 'lparen': |
| 273 | self.parse_signature(node) |
Armin Ronacher | c9705c2 | 2008-04-27 21:28:03 +0200 | [diff] [blame] | 274 | else: |
| 275 | node.args = [] |
| 276 | node.defaults = [] |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 277 | |
Armin Ronacher | 8edbe49 | 2008-04-10 20:43:43 +0200 | [diff] [blame] | 278 | node.call = self.parse_expression() |
| 279 | if not isinstance(node.call, nodes.Call): |
| 280 | raise TemplateSyntaxError('expected call', node.lineno, |
| 281 | self.filename) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 282 | node.body = self.parse_statements(('name:endcall',), drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 283 | return node |
| 284 | |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 285 | def parse_filter_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 286 | node = nodes.FilterBlock(lineno=self.stream.next().lineno) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 287 | node.filter = self.parse_filter(None, start_inline=True) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 288 | node.body = self.parse_statements(('name:endfilter',), |
| 289 | drop_needle=True) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 290 | return node |
| 291 | |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 292 | def parse_macro(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 293 | node = nodes.Macro(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 294 | node.name = self.stream.expect('name').value |
Armin Ronacher | f059ec1 | 2008-04-11 22:21:00 +0200 | [diff] [blame] | 295 | # make sure that assignments to that name are allowed |
| 296 | if not nodes.Name(node.name, 'store').can_assign(): |
| 297 | raise TemplateSyntaxError('can\'t assign macro to %r' % |
| 298 | node.target, node.lineno, |
| 299 | self.filename) |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 300 | self.parse_signature(node) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 301 | node.body = self.parse_statements(('name:endmacro',), |
| 302 | drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 303 | return node |
| 304 | |
| 305 | def parse_print(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 306 | node = nodes.Output(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 307 | node.nodes = [] |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 308 | while self.stream.current.type is not 'block_end': |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 309 | if node.nodes: |
| 310 | self.stream.expect('comma') |
| 311 | node.nodes.append(self.parse_expression()) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 312 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 313 | |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 314 | def parse_expression(self, no_condexpr=False): |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 315 | """Parse an expression. Per default all expressions are parsed, if |
| 316 | the optional `no_condexpr` parameter is set to `True` conditional |
| 317 | expressions are not parsed. |
| 318 | """ |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 319 | if no_condexpr: |
| 320 | return self.parse_or() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 321 | return self.parse_condexpr() |
| 322 | |
| 323 | def parse_condexpr(self): |
| 324 | lineno = self.stream.current.lineno |
| 325 | expr1 = self.parse_or() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 326 | while self.stream.current.test('name:if'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 327 | self.stream.next() |
| 328 | expr2 = self.parse_or() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 329 | self.stream.expect('name:else') |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 330 | expr3 = self.parse_condexpr() |
| 331 | expr1 = nodes.CondExpr(expr2, expr1, expr3, lineno=lineno) |
| 332 | lineno = self.stream.current.lineno |
| 333 | return expr1 |
| 334 | |
| 335 | def parse_or(self): |
| 336 | lineno = self.stream.current.lineno |
| 337 | left = self.parse_and() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 338 | while self.stream.current.test('name:or'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 339 | self.stream.next() |
| 340 | right = self.parse_and() |
| 341 | left = nodes.Or(left, right, lineno=lineno) |
| 342 | lineno = self.stream.current.lineno |
| 343 | return left |
| 344 | |
| 345 | def parse_and(self): |
| 346 | lineno = self.stream.current.lineno |
| 347 | left = self.parse_compare() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 348 | while self.stream.current.test('name:and'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 349 | self.stream.next() |
| 350 | right = self.parse_compare() |
| 351 | left = nodes.And(left, right, lineno=lineno) |
| 352 | lineno = self.stream.current.lineno |
| 353 | return left |
| 354 | |
| 355 | def parse_compare(self): |
| 356 | lineno = self.stream.current.lineno |
| 357 | expr = self.parse_add() |
| 358 | ops = [] |
| 359 | while 1: |
| 360 | token_type = self.stream.current.type |
| 361 | if token_type in _compare_operators: |
| 362 | self.stream.next() |
| 363 | ops.append(nodes.Operand(token_type, self.parse_add())) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 364 | elif self.stream.current.test('name:in'): |
| 365 | self.stream.next() |
| 366 | ops.append(nodes.Operand('in', self.parse_add())) |
| 367 | elif self.stream.current.test('name:not') and \ |
| 368 | self.stream.look().test('name:in'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 369 | self.stream.skip(2) |
| 370 | ops.append(nodes.Operand('notin', self.parse_add())) |
| 371 | else: |
| 372 | break |
| 373 | lineno = self.stream.current.lineno |
| 374 | if not ops: |
| 375 | return expr |
| 376 | return nodes.Compare(expr, ops, lineno=lineno) |
| 377 | |
| 378 | def parse_add(self): |
| 379 | lineno = self.stream.current.lineno |
| 380 | left = self.parse_sub() |
| 381 | while self.stream.current.type is 'add': |
| 382 | self.stream.next() |
| 383 | right = self.parse_sub() |
| 384 | left = nodes.Add(left, right, lineno=lineno) |
| 385 | lineno = self.stream.current.lineno |
| 386 | return left |
| 387 | |
| 388 | def parse_sub(self): |
| 389 | lineno = self.stream.current.lineno |
| 390 | left = self.parse_concat() |
| 391 | while self.stream.current.type is 'sub': |
| 392 | self.stream.next() |
| 393 | right = self.parse_concat() |
| 394 | left = nodes.Sub(left, right, lineno=lineno) |
| 395 | lineno = self.stream.current.lineno |
| 396 | return left |
| 397 | |
| 398 | def parse_concat(self): |
| 399 | lineno = self.stream.current.lineno |
| 400 | args = [self.parse_mul()] |
| 401 | while self.stream.current.type is 'tilde': |
| 402 | self.stream.next() |
| 403 | args.append(self.parse_mul()) |
| 404 | if len(args) == 1: |
| 405 | return args[0] |
| 406 | return nodes.Concat(args, lineno=lineno) |
| 407 | |
| 408 | def parse_mul(self): |
| 409 | lineno = self.stream.current.lineno |
| 410 | left = self.parse_div() |
| 411 | while self.stream.current.type is 'mul': |
| 412 | self.stream.next() |
| 413 | right = self.parse_div() |
| 414 | left = nodes.Mul(left, right, lineno=lineno) |
| 415 | lineno = self.stream.current.lineno |
| 416 | return left |
| 417 | |
| 418 | def parse_div(self): |
| 419 | lineno = self.stream.current.lineno |
| 420 | left = self.parse_floordiv() |
| 421 | while self.stream.current.type is 'div': |
| 422 | self.stream.next() |
| 423 | right = self.parse_floordiv() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 424 | left = nodes.Div(left, right, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 425 | lineno = self.stream.current.lineno |
| 426 | return left |
| 427 | |
| 428 | def parse_floordiv(self): |
| 429 | lineno = self.stream.current.lineno |
| 430 | left = self.parse_mod() |
| 431 | while self.stream.current.type is 'floordiv': |
| 432 | self.stream.next() |
| 433 | right = self.parse_mod() |
| 434 | left = nodes.FloorDiv(left, right, lineno=lineno) |
| 435 | lineno = self.stream.current.lineno |
| 436 | return left |
| 437 | |
| 438 | def parse_mod(self): |
| 439 | lineno = self.stream.current.lineno |
| 440 | left = self.parse_pow() |
| 441 | while self.stream.current.type is 'mod': |
| 442 | self.stream.next() |
| 443 | right = self.parse_pow() |
| 444 | left = nodes.Mod(left, right, lineno=lineno) |
| 445 | lineno = self.stream.current.lineno |
| 446 | return left |
| 447 | |
| 448 | def parse_pow(self): |
| 449 | lineno = self.stream.current.lineno |
| 450 | left = self.parse_unary() |
| 451 | while self.stream.current.type is 'pow': |
| 452 | self.stream.next() |
| 453 | right = self.parse_unary() |
| 454 | left = nodes.Pow(left, right, lineno=lineno) |
| 455 | lineno = self.stream.current.lineno |
| 456 | return left |
| 457 | |
| 458 | def parse_unary(self): |
| 459 | token_type = self.stream.current.type |
| 460 | lineno = self.stream.current.lineno |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 461 | if token_type is 'name' and self.stream.current.value == 'not': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 462 | self.stream.next() |
| 463 | node = self.parse_unary() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 464 | return nodes.Not(node, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 465 | if token_type is 'sub': |
| 466 | self.stream.next() |
| 467 | node = self.parse_unary() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 468 | return nodes.Neg(node, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 469 | if token_type is 'add': |
| 470 | self.stream.next() |
| 471 | node = self.parse_unary() |
| 472 | return nodes.Pos(node, lineno=lineno) |
| 473 | return self.parse_primary() |
| 474 | |
| 475 | def parse_primary(self, parse_postfix=True): |
| 476 | token = self.stream.current |
| 477 | if token.type is 'name': |
| 478 | if token.value in ('true', 'false'): |
| 479 | node = nodes.Const(token.value == 'true', lineno=token.lineno) |
| 480 | elif token.value == 'none': |
| 481 | node = nodes.Const(None, lineno=token.lineno) |
| 482 | else: |
| 483 | node = nodes.Name(token.value, 'load', lineno=token.lineno) |
| 484 | self.stream.next() |
| 485 | elif token.type in ('integer', 'float', 'string'): |
| 486 | self.stream.next() |
| 487 | node = nodes.Const(token.value, lineno=token.lineno) |
| 488 | elif token.type is 'lparen': |
| 489 | self.stream.next() |
| 490 | node = self.parse_tuple() |
| 491 | self.stream.expect('rparen') |
| 492 | elif token.type is 'lbracket': |
| 493 | node = self.parse_list() |
| 494 | elif token.type is 'lbrace': |
| 495 | node = self.parse_dict() |
| 496 | else: |
| 497 | raise TemplateSyntaxError("unexpected token '%s'" % |
| 498 | (token,), token.lineno, |
| 499 | self.filename) |
| 500 | if parse_postfix: |
| 501 | node = self.parse_postfix(node) |
| 502 | return node |
| 503 | |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 504 | def parse_tuple(self, simplified=False, no_condexpr=False): |
| 505 | """Works like `parse_expression` but if multiple expressions are |
| 506 | delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created. |
| 507 | This method could also return a regular expression instead of a tuple |
| 508 | if no commas where found. |
| 509 | |
| 510 | The default parsing mode is a full tuple. If `simplified` is `True` |
| 511 | only names and literals are parsed. The `no_condexpr` parameter is |
| 512 | forwarded to :meth:`parse_expression`. |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 513 | """ |
| 514 | lineno = self.stream.current.lineno |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 515 | if simplified: |
| 516 | parse = self.parse_primary |
| 517 | elif no_condexpr: |
| 518 | parse = lambda: self.parse_expression(no_condexpr=True) |
| 519 | else: |
| 520 | parse = self.parse_expression |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 521 | args = [] |
| 522 | is_tuple = False |
| 523 | while 1: |
| 524 | if args: |
| 525 | self.stream.expect('comma') |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 526 | if self.is_tuple_end(): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 527 | break |
| 528 | args.append(parse()) |
Armin Ronacher | b5124e6 | 2008-04-25 00:36:14 +0200 | [diff] [blame] | 529 | if self.stream.current.type is 'comma': |
| 530 | is_tuple = True |
| 531 | else: |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 532 | break |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 533 | lineno = self.stream.current.lineno |
| 534 | if not is_tuple and args: |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 535 | return args[0] |
| 536 | return nodes.Tuple(args, 'load', lineno=lineno) |
| 537 | |
| 538 | def parse_list(self): |
| 539 | token = self.stream.expect('lbracket') |
| 540 | items = [] |
| 541 | while self.stream.current.type is not 'rbracket': |
| 542 | if items: |
| 543 | self.stream.expect('comma') |
| 544 | if self.stream.current.type == 'rbracket': |
| 545 | break |
| 546 | items.append(self.parse_expression()) |
| 547 | self.stream.expect('rbracket') |
| 548 | return nodes.List(items, lineno=token.lineno) |
| 549 | |
| 550 | def parse_dict(self): |
| 551 | token = self.stream.expect('lbrace') |
| 552 | items = [] |
| 553 | while self.stream.current.type is not 'rbrace': |
| 554 | if items: |
| 555 | self.stream.expect('comma') |
| 556 | if self.stream.current.type == 'rbrace': |
| 557 | break |
| 558 | key = self.parse_expression() |
| 559 | self.stream.expect('colon') |
| 560 | value = self.parse_expression() |
| 561 | items.append(nodes.Pair(key, value, lineno=key.lineno)) |
| 562 | self.stream.expect('rbrace') |
Armin Ronacher | be4ae24 | 2008-04-18 09:49:08 +0200 | [diff] [blame] | 563 | return nodes.Dict(items, lineno=token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 564 | |
| 565 | def parse_postfix(self, node): |
| 566 | while 1: |
| 567 | token_type = self.stream.current.type |
| 568 | if token_type is 'dot' or token_type is 'lbracket': |
| 569 | node = self.parse_subscript(node) |
| 570 | elif token_type is 'lparen': |
| 571 | node = self.parse_call(node) |
| 572 | elif token_type is 'pipe': |
| 573 | node = self.parse_filter(node) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 574 | elif token_type is 'name' and self.stream.current.value == 'is': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 575 | node = self.parse_test(node) |
| 576 | else: |
| 577 | break |
| 578 | return node |
| 579 | |
| 580 | def parse_subscript(self, node): |
| 581 | token = self.stream.next() |
| 582 | if token.type is 'dot': |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 583 | attr_token = self.stream.current |
| 584 | if attr_token.type not in ('name', 'integer'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 585 | raise TemplateSyntaxError('expected name or number', |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 586 | attr_token.lineno, self.filename) |
| 587 | arg = nodes.Const(attr_token.value, lineno=attr_token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 588 | self.stream.next() |
| 589 | elif token.type is 'lbracket': |
| 590 | args = [] |
| 591 | while self.stream.current.type is not 'rbracket': |
| 592 | if args: |
| 593 | self.stream.expect('comma') |
| 594 | args.append(self.parse_subscribed()) |
| 595 | self.stream.expect('rbracket') |
| 596 | if len(args) == 1: |
| 597 | arg = args[0] |
| 598 | else: |
Benjamin Wiegand | a315274 | 2008-04-28 18:07:52 +0200 | [diff] [blame] | 599 | arg = nodes.Tuple(args, self.lineno, self.filename) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 600 | else: |
| 601 | raise TemplateSyntaxError('expected subscript expression', |
| 602 | self.lineno, self.filename) |
| 603 | return nodes.Subscript(node, arg, 'load', lineno=token.lineno) |
| 604 | |
| 605 | def parse_subscribed(self): |
| 606 | lineno = self.stream.current.lineno |
| 607 | |
| 608 | if self.stream.current.type is 'colon': |
| 609 | self.stream.next() |
| 610 | args = [None] |
| 611 | else: |
| 612 | node = self.parse_expression() |
| 613 | if self.stream.current.type is not 'colon': |
| 614 | return node |
| 615 | self.stream.next() |
| 616 | args = [node] |
| 617 | |
| 618 | if self.stream.current.type is 'colon': |
| 619 | args.append(None) |
| 620 | elif self.stream.current.type not in ('rbracket', 'comma'): |
| 621 | args.append(self.parse_expression()) |
| 622 | else: |
| 623 | args.append(None) |
| 624 | |
| 625 | if self.stream.current.type is 'colon': |
| 626 | self.stream.next() |
| 627 | if self.stream.current.type not in ('rbracket', 'comma'): |
| 628 | args.append(self.parse_expression()) |
| 629 | else: |
| 630 | args.append(None) |
| 631 | else: |
| 632 | args.append(None) |
| 633 | |
| 634 | return nodes.Slice(lineno=lineno, *args) |
| 635 | |
| 636 | def parse_call(self, node): |
| 637 | token = self.stream.expect('lparen') |
| 638 | args = [] |
| 639 | kwargs = [] |
| 640 | dyn_args = dyn_kwargs = None |
| 641 | require_comma = False |
| 642 | |
| 643 | def ensure(expr): |
| 644 | if not expr: |
| 645 | raise TemplateSyntaxError('invalid syntax for function ' |
| 646 | 'call expression', token.lineno, |
| 647 | self.filename) |
| 648 | |
| 649 | while self.stream.current.type is not 'rparen': |
| 650 | if require_comma: |
| 651 | self.stream.expect('comma') |
| 652 | # support for trailing comma |
| 653 | if self.stream.current.type is 'rparen': |
| 654 | break |
| 655 | if self.stream.current.type is 'mul': |
| 656 | ensure(dyn_args is None and dyn_kwargs is None) |
| 657 | self.stream.next() |
| 658 | dyn_args = self.parse_expression() |
| 659 | elif self.stream.current.type is 'pow': |
| 660 | ensure(dyn_kwargs is None) |
| 661 | self.stream.next() |
| 662 | dyn_kwargs = self.parse_expression() |
| 663 | else: |
| 664 | ensure(dyn_args is None and dyn_kwargs is None) |
| 665 | if self.stream.current.type is 'name' and \ |
| 666 | self.stream.look().type is 'assign': |
| 667 | key = self.stream.current.value |
| 668 | self.stream.skip(2) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 669 | value = self.parse_expression() |
| 670 | kwargs.append(nodes.Keyword(key, value, |
| 671 | lineno=value.lineno)) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 672 | else: |
| 673 | ensure(not kwargs) |
| 674 | args.append(self.parse_expression()) |
| 675 | |
| 676 | require_comma = True |
| 677 | self.stream.expect('rparen') |
| 678 | |
| 679 | if node is None: |
| 680 | return args, kwargs, dyn_args, dyn_kwargs |
| 681 | return nodes.Call(node, args, kwargs, dyn_args, dyn_kwargs, |
| 682 | lineno=token.lineno) |
| 683 | |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 684 | def parse_filter(self, node, start_inline=False): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 685 | lineno = self.stream.current.type |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 686 | while self.stream.current.type == 'pipe' or start_inline: |
| 687 | if not start_inline: |
| 688 | self.stream.next() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 689 | token = self.stream.expect('name') |
| 690 | if self.stream.current.type is 'lparen': |
| 691 | args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None) |
| 692 | else: |
| 693 | args = [] |
| 694 | kwargs = [] |
| 695 | dyn_args = dyn_kwargs = None |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 696 | node = nodes.Filter(node, token.value, args, kwargs, dyn_args, |
| 697 | dyn_kwargs, lineno=token.lineno) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 698 | start_inline = False |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 699 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 700 | |
| 701 | def parse_test(self, node): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 702 | token = self.stream.next() |
| 703 | if self.stream.current.test('name:not'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 704 | self.stream.next() |
| 705 | negated = True |
| 706 | else: |
| 707 | negated = False |
| 708 | name = self.stream.expect('name').value |
Armin Ronacher | 10f3ba2 | 2008-04-18 11:30:37 +0200 | [diff] [blame] | 709 | dyn_args = dyn_kwargs = None |
| 710 | kwargs = [] |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 711 | if self.stream.current.type is 'lparen': |
| 712 | args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None) |
| 713 | elif self.stream.current.type in ('name', 'string', 'integer', |
| 714 | 'float', 'lparen', 'lbracket', |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 715 | 'lbrace'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 716 | args = [self.parse_expression()] |
| 717 | else: |
| 718 | args = [] |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 719 | node = nodes.Test(node, name, args, kwargs, dyn_args, |
| 720 | dyn_kwargs, lineno=token.lineno) |
| 721 | if negated: |
Armin Ronacher | 9a82205 | 2008-04-17 18:44:07 +0200 | [diff] [blame] | 722 | node = nodes.Not(node, lineno=token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 723 | return node |
| 724 | |
| 725 | def subparse(self, end_tokens=None): |
| 726 | body = [] |
| 727 | data_buffer = [] |
| 728 | add_data = data_buffer.append |
| 729 | |
| 730 | def flush_data(): |
| 731 | if data_buffer: |
| 732 | lineno = data_buffer[0].lineno |
| 733 | body.append(nodes.Output(data_buffer[:], lineno=lineno)) |
| 734 | del data_buffer[:] |
| 735 | |
| 736 | while self.stream: |
| 737 | token = self.stream.current |
| 738 | if token.type is 'data': |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 739 | if token.value: |
| 740 | add_data(nodes.Const(token.value, lineno=token.lineno)) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 741 | self.stream.next() |
| 742 | elif token.type is 'variable_begin': |
| 743 | self.stream.next() |
Armin Ronacher | b5124e6 | 2008-04-25 00:36:14 +0200 | [diff] [blame] | 744 | add_data(self.parse_tuple()) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 745 | self.stream.expect('variable_end') |
| 746 | elif token.type is 'block_begin': |
| 747 | flush_data() |
| 748 | self.stream.next() |
| 749 | if end_tokens is not None and \ |
Armin Ronacher | cda43df | 2008-05-03 17:10:05 +0200 | [diff] [blame] | 750 | self.stream.current.test_any(*end_tokens): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 751 | return body |
Armin Ronacher | 023b5e9 | 2008-05-08 11:03:10 +0200 | [diff] [blame] | 752 | rv = self.parse_statement() |
| 753 | if isinstance(rv, list): |
| 754 | body.extend(rv) |
| 755 | else: |
| 756 | body.append(rv) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 757 | self.stream.expect('block_end') |
| 758 | else: |
| 759 | raise AssertionError('internal parsing error') |
| 760 | |
| 761 | flush_data() |
| 762 | return body |
| 763 | |
| 764 | def parse(self): |
| 765 | """Parse the whole template into a `Template` node.""" |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 766 | result = nodes.Template(self.subparse(), lineno=1) |
| 767 | result.set_environment(self.environment) |
| 768 | return result |