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 | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 21 | """The template parser class. |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 22 | |
| 23 | Transforms sourcecode into an abstract syntax tree. |
| 24 | """ |
| 25 | |
| 26 | def __init__(self, environment, source, filename=None): |
| 27 | self.environment = environment |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 28 | if isinstance(filename, unicode): |
| 29 | filename = filename.encode('utf-8') |
Armin Ronacher | bf7c4ad | 2008-04-12 12:02:36 +0200 | [diff] [blame] | 30 | self.source = unicode(source) |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 31 | self.filename = filename |
| 32 | self.closed = False |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 33 | self.stream = environment.lexer.tokenize(source, filename) |
Armin Ronacher | 0553093 | 2008-04-20 13:27:49 +0200 | [diff] [blame] | 34 | self.extensions = {} |
| 35 | for extension in environment.extensions: |
| 36 | for tag in extension.tags: |
| 37 | self.extensions[tag] = extension.parse |
Armin Ronacher | 07bc684 | 2008-03-31 14:18:49 +0200 | [diff] [blame] | 38 | |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 39 | def is_statement_end(self): |
| 40 | """Are we at the end of a statement?""" |
| 41 | if self.stream.current.type in ('variable_end', 'block_end'): |
| 42 | return True |
| 43 | return self.stream.current.test('name:in') |
| 44 | |
| 45 | def is_tuple_end(self): |
| 46 | """Are we at the end of a tuple?""" |
| 47 | return self.stream.current.type is 'rparen' or self.is_statement_end() |
| 48 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 49 | def parse_statement(self): |
| 50 | """Parse a single statement.""" |
| 51 | token_type = self.stream.current.type |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 52 | if self.stream.current.type is 'name': |
| 53 | if self.stream.current.value in _statement_keywords: |
| 54 | return getattr(self, 'parse_' + self.stream.current.value)() |
| 55 | elif self.stream.current.value == 'call': |
| 56 | return self.parse_call_block() |
| 57 | elif self.stream.current.value == 'filter': |
| 58 | return self.parse_filter_block() |
| 59 | else: |
| 60 | ext = self.extensions.get(self.stream.current.value) |
| 61 | if ext is not None: |
| 62 | return ext(self) |
Armin Ronacher | 157531b | 2008-04-28 16:14:03 +0200 | [diff] [blame] | 63 | lineno = self.stream.current.lineno |
Armin Ronacher | 8efc522 | 2008-04-08 14:47:40 +0200 | [diff] [blame] | 64 | expr = self.parse_tuple() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 65 | if self.stream.current.type == 'assign': |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 66 | result = self.parse_assign(expr) |
| 67 | else: |
| 68 | result = nodes.ExprStmt(expr, lineno=lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 69 | return result |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 70 | |
| 71 | def parse_assign(self, target): |
| 72 | """Parse an assign statement.""" |
| 73 | lineno = self.stream.expect('assign').lineno |
| 74 | if not target.can_assign(): |
| 75 | raise TemplateSyntaxError("can't assign to '%s'" % |
Armin Ronacher | 4f7d2d5 | 2008-04-22 10:40:26 +0200 | [diff] [blame] | 76 | target.__class__.__name__.lower(), |
| 77 | target.lineno, self.filename) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 78 | expr = self.parse_tuple() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 79 | target.set_ctx('store') |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 80 | return nodes.Assign(target, expr, lineno=lineno) |
| 81 | |
| 82 | def parse_statements(self, end_tokens, drop_needle=False): |
Armin Ronacher | f59bac2 | 2008-04-20 13:11:43 +0200 | [diff] [blame] | 83 | """Parse multiple statements into a list until one of the end tokens |
| 84 | is reached. This is used to parse the body of statements as it also |
| 85 | parses template data if appropriate. |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 86 | """ |
| 87 | # the first token may be a colon for python compatibility |
| 88 | if self.stream.current.type is 'colon': |
| 89 | self.stream.next() |
| 90 | |
Armin Ronacher | 2b60fe5 | 2008-04-21 08:23:59 +0200 | [diff] [blame] | 91 | # in the future it would be possible to add whole code sections |
| 92 | # by adding some sort of end of statement token and parsing those here. |
| 93 | self.stream.expect('block_end') |
| 94 | result = self.subparse(end_tokens) |
| 95 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 96 | if drop_needle: |
| 97 | self.stream.next() |
| 98 | return result |
| 99 | |
| 100 | def parse_for(self): |
| 101 | """Parse a for loop.""" |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 102 | lineno = self.stream.expect('name:for').lineno |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 103 | target = self.parse_tuple(simplified=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 104 | if not target.can_assign(): |
| 105 | raise TemplateSyntaxError("can't assign to '%s'" % |
Armin Ronacher | 4f7d2d5 | 2008-04-22 10:40:26 +0200 | [diff] [blame] | 106 | target.__class__.__name__.lower(), |
| 107 | target.lineno, self.filename) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 108 | target.set_ctx('store') |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 109 | self.stream.expect('name:in') |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 110 | iter = self.parse_tuple(no_condexpr=True) |
| 111 | test = None |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 112 | if self.stream.current.type is 'name:if': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 113 | self.stream.next() |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 114 | test = self.parse_expression() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 115 | body = self.parse_statements(('name:endfor', 'name:else')) |
| 116 | if self.stream.next().value == 'endfor': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 117 | else_ = [] |
| 118 | else: |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 119 | else_ = self.parse_statements(('name:endfor',), drop_needle=True) |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 120 | return nodes.For(target, iter, body, else_, test, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 121 | |
| 122 | def parse_if(self): |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 123 | """Parse an if construct.""" |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 124 | node = result = nodes.If(lineno=self.stream.expect('name:if').lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 125 | while 1: |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 126 | node.test = self.parse_tuple(no_condexpr=True) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 127 | node.body = self.parse_statements(('name:elif', 'name:else', |
| 128 | 'name:endif')) |
| 129 | token = self.stream.next() |
| 130 | if token.test('name:elif'): |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 131 | new_node = nodes.If(lineno=self.stream.current.lineno) |
| 132 | node.else_ = [new_node] |
| 133 | node = new_node |
| 134 | continue |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 135 | elif token.test('name:else'): |
| 136 | node.else_ = self.parse_statements(('name:endif',), |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 137 | drop_needle=True) |
| 138 | else: |
| 139 | node.else_ = [] |
| 140 | break |
| 141 | return result |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 142 | |
| 143 | def parse_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 144 | node = nodes.Block(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 145 | node.name = self.stream.expect('name').value |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 146 | node.body = self.parse_statements(('name:endblock',), drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 147 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 148 | |
| 149 | def parse_extends(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 150 | node = nodes.Extends(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 151 | node.template = self.parse_expression() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 152 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 153 | |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 154 | def parse_import_context(self, node, default): |
Armin Ronacher | cda43df | 2008-05-03 17:10:05 +0200 | [diff] [blame^] | 155 | if self.stream.current.test_any('name:with', 'name:without') and \ |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 156 | self.stream.look().test('name:context'): |
| 157 | node.with_context = self.stream.next().value == 'with' |
| 158 | self.stream.skip() |
| 159 | else: |
| 160 | node.with_context = default |
| 161 | return node |
| 162 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 163 | def parse_include(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 164 | node = nodes.Include(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 165 | node.template = self.parse_expression() |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 166 | return self.parse_import_context(node, True) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 167 | |
| 168 | def parse_import(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 169 | node = nodes.Import(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 170 | node.template = self.parse_expression() |
| 171 | self.stream.expect('name:as') |
| 172 | node.target = self.stream.expect('name').value |
| 173 | if not nodes.Name(node.target, 'store').can_assign(): |
| 174 | raise TemplateSyntaxError('can\'t assign imported template ' |
| 175 | 'to %r' % node.target, node.lineno, |
| 176 | self.filename) |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 177 | return self.parse_import_context(node, False) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 178 | |
| 179 | def parse_from(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 180 | node = nodes.FromImport(lineno=self.stream.next().lineno) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 181 | node.template = self.parse_expression() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 182 | self.stream.expect('name:import') |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 183 | node.names = [] |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 184 | |
| 185 | def parse_context(): |
| 186 | if self.stream.current.value in ('with', 'without') and \ |
| 187 | self.stream.look().test('name:context'): |
| 188 | node.with_context = self.stream.next().value == 'with' |
| 189 | self.stream.skip() |
| 190 | return True |
| 191 | return False |
| 192 | |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 193 | while 1: |
| 194 | if node.names: |
| 195 | self.stream.expect('comma') |
| 196 | if self.stream.current.type is 'name': |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 197 | if parse_context(): |
| 198 | break |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 199 | target = nodes.Name(self.stream.current.value, 'store') |
| 200 | if not target.can_assign(): |
| 201 | raise TemplateSyntaxError('can\'t import object named %r' |
| 202 | % target.name, target.lineno, |
| 203 | self.filename) |
| 204 | elif target.name.startswith('__'): |
| 205 | raise TemplateAssertionError('names starting with two ' |
| 206 | 'underscores can not be ' |
| 207 | 'imported', target.lineno, |
| 208 | self.filename) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 209 | self.stream.next() |
Armin Ronacher | 2feed1d | 2008-04-26 16:26:52 +0200 | [diff] [blame] | 210 | if self.stream.current.test('name:as'): |
| 211 | self.stream.next() |
| 212 | alias = self.stream.expect('name') |
| 213 | if not nodes.Name(alias.value, 'store').can_assign(): |
| 214 | raise TemplateSyntaxError('can\'t name imported ' |
| 215 | 'object %r.' % alias.value, |
| 216 | alias.lineno, self.filename) |
| 217 | node.names.append((target.name, alias.value)) |
| 218 | else: |
| 219 | node.names.append(target.name) |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 220 | if parse_context() or self.stream.current.type is not 'comma': |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 221 | break |
| 222 | else: |
| 223 | break |
Armin Ronacher | ea847c5 | 2008-05-02 20:04:32 +0200 | [diff] [blame] | 224 | if not hasattr(node, 'with_context'): |
| 225 | node.with_context = False |
| 226 | if self.stream.current.type is 'comma': |
| 227 | self.stream.next() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 228 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 229 | |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 230 | def parse_signature(self, node): |
| 231 | node.args = args = [] |
| 232 | node.defaults = defaults = [] |
| 233 | self.stream.expect('lparen') |
| 234 | while self.stream.current.type is not 'rparen': |
| 235 | if args: |
| 236 | self.stream.expect('comma') |
| 237 | token = self.stream.expect('name') |
| 238 | arg = nodes.Name(token.value, 'param', lineno=token.lineno) |
| 239 | if not arg.can_assign(): |
| 240 | raise TemplateSyntaxError("can't assign to '%s'" % |
| 241 | arg.name, arg.lineno, |
| 242 | self.filename) |
| 243 | if self.stream.current.type is 'assign': |
| 244 | self.stream.next() |
| 245 | defaults.append(self.parse_expression()) |
| 246 | args.append(arg) |
| 247 | self.stream.expect('rparen') |
| 248 | |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 249 | def parse_call_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 250 | node = nodes.CallBlock(lineno=self.stream.next().lineno) |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 251 | if self.stream.current.type is 'lparen': |
| 252 | self.parse_signature(node) |
Armin Ronacher | c9705c2 | 2008-04-27 21:28:03 +0200 | [diff] [blame] | 253 | else: |
| 254 | node.args = [] |
| 255 | node.defaults = [] |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 256 | |
Armin Ronacher | 8edbe49 | 2008-04-10 20:43:43 +0200 | [diff] [blame] | 257 | node.call = self.parse_expression() |
| 258 | if not isinstance(node.call, nodes.Call): |
| 259 | raise TemplateSyntaxError('expected call', node.lineno, |
| 260 | self.filename) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 261 | node.body = self.parse_statements(('name:endcall',), drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 262 | return node |
| 263 | |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 264 | def parse_filter_block(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 265 | node = nodes.FilterBlock(lineno=self.stream.next().lineno) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 266 | node.filter = self.parse_filter(None, start_inline=True) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 267 | node.body = self.parse_statements(('name:endfilter',), |
| 268 | drop_needle=True) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 269 | return node |
| 270 | |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 271 | def parse_macro(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 272 | node = nodes.Macro(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 273 | node.name = self.stream.expect('name').value |
Armin Ronacher | f059ec1 | 2008-04-11 22:21:00 +0200 | [diff] [blame] | 274 | # make sure that assignments to that name are allowed |
| 275 | if not nodes.Name(node.name, 'store').can_assign(): |
| 276 | raise TemplateSyntaxError('can\'t assign macro to %r' % |
| 277 | node.target, node.lineno, |
| 278 | self.filename) |
Armin Ronacher | 7108207 | 2008-04-12 14:19:36 +0200 | [diff] [blame] | 279 | self.parse_signature(node) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 280 | node.body = self.parse_statements(('name:endmacro',), |
| 281 | drop_needle=True) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 282 | return node |
| 283 | |
| 284 | def parse_print(self): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 285 | node = nodes.Output(lineno=self.stream.next().lineno) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 286 | node.nodes = [] |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 287 | while not self.is_statement_end(): |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 288 | if node.nodes: |
| 289 | self.stream.expect('comma') |
| 290 | node.nodes.append(self.parse_expression()) |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 291 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 292 | |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 293 | def parse_expression(self, no_condexpr=False): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 294 | """Parse an expression.""" |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 295 | if no_condexpr: |
| 296 | return self.parse_or() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 297 | return self.parse_condexpr() |
| 298 | |
| 299 | def parse_condexpr(self): |
| 300 | lineno = self.stream.current.lineno |
| 301 | expr1 = self.parse_or() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 302 | while self.stream.current.test('name:if'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 303 | self.stream.next() |
| 304 | expr2 = self.parse_or() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 305 | self.stream.expect('name:else') |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 306 | expr3 = self.parse_condexpr() |
| 307 | expr1 = nodes.CondExpr(expr2, expr1, expr3, lineno=lineno) |
| 308 | lineno = self.stream.current.lineno |
| 309 | return expr1 |
| 310 | |
| 311 | def parse_or(self): |
| 312 | lineno = self.stream.current.lineno |
| 313 | left = self.parse_and() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 314 | while self.stream.current.test('name:or'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 315 | self.stream.next() |
| 316 | right = self.parse_and() |
| 317 | left = nodes.Or(left, right, lineno=lineno) |
| 318 | lineno = self.stream.current.lineno |
| 319 | return left |
| 320 | |
| 321 | def parse_and(self): |
| 322 | lineno = self.stream.current.lineno |
| 323 | left = self.parse_compare() |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 324 | while self.stream.current.test('name:and'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 325 | self.stream.next() |
| 326 | right = self.parse_compare() |
| 327 | left = nodes.And(left, right, lineno=lineno) |
| 328 | lineno = self.stream.current.lineno |
| 329 | return left |
| 330 | |
| 331 | def parse_compare(self): |
| 332 | lineno = self.stream.current.lineno |
| 333 | expr = self.parse_add() |
| 334 | ops = [] |
| 335 | while 1: |
| 336 | token_type = self.stream.current.type |
| 337 | if token_type in _compare_operators: |
| 338 | self.stream.next() |
| 339 | ops.append(nodes.Operand(token_type, self.parse_add())) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 340 | elif self.stream.current.test('name:in'): |
| 341 | self.stream.next() |
| 342 | ops.append(nodes.Operand('in', self.parse_add())) |
| 343 | elif self.stream.current.test('name:not') and \ |
| 344 | self.stream.look().test('name:in'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 345 | self.stream.skip(2) |
| 346 | ops.append(nodes.Operand('notin', self.parse_add())) |
| 347 | else: |
| 348 | break |
| 349 | lineno = self.stream.current.lineno |
| 350 | if not ops: |
| 351 | return expr |
| 352 | return nodes.Compare(expr, ops, lineno=lineno) |
| 353 | |
| 354 | def parse_add(self): |
| 355 | lineno = self.stream.current.lineno |
| 356 | left = self.parse_sub() |
| 357 | while self.stream.current.type is 'add': |
| 358 | self.stream.next() |
| 359 | right = self.parse_sub() |
| 360 | left = nodes.Add(left, right, lineno=lineno) |
| 361 | lineno = self.stream.current.lineno |
| 362 | return left |
| 363 | |
| 364 | def parse_sub(self): |
| 365 | lineno = self.stream.current.lineno |
| 366 | left = self.parse_concat() |
| 367 | while self.stream.current.type is 'sub': |
| 368 | self.stream.next() |
| 369 | right = self.parse_concat() |
| 370 | left = nodes.Sub(left, right, lineno=lineno) |
| 371 | lineno = self.stream.current.lineno |
| 372 | return left |
| 373 | |
| 374 | def parse_concat(self): |
| 375 | lineno = self.stream.current.lineno |
| 376 | args = [self.parse_mul()] |
| 377 | while self.stream.current.type is 'tilde': |
| 378 | self.stream.next() |
| 379 | args.append(self.parse_mul()) |
| 380 | if len(args) == 1: |
| 381 | return args[0] |
| 382 | return nodes.Concat(args, lineno=lineno) |
| 383 | |
| 384 | def parse_mul(self): |
| 385 | lineno = self.stream.current.lineno |
| 386 | left = self.parse_div() |
| 387 | while self.stream.current.type is 'mul': |
| 388 | self.stream.next() |
| 389 | right = self.parse_div() |
| 390 | left = nodes.Mul(left, right, lineno=lineno) |
| 391 | lineno = self.stream.current.lineno |
| 392 | return left |
| 393 | |
| 394 | def parse_div(self): |
| 395 | lineno = self.stream.current.lineno |
| 396 | left = self.parse_floordiv() |
| 397 | while self.stream.current.type is 'div': |
| 398 | self.stream.next() |
| 399 | right = self.parse_floordiv() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 400 | left = nodes.Div(left, right, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 401 | lineno = self.stream.current.lineno |
| 402 | return left |
| 403 | |
| 404 | def parse_floordiv(self): |
| 405 | lineno = self.stream.current.lineno |
| 406 | left = self.parse_mod() |
| 407 | while self.stream.current.type is 'floordiv': |
| 408 | self.stream.next() |
| 409 | right = self.parse_mod() |
| 410 | left = nodes.FloorDiv(left, right, lineno=lineno) |
| 411 | lineno = self.stream.current.lineno |
| 412 | return left |
| 413 | |
| 414 | def parse_mod(self): |
| 415 | lineno = self.stream.current.lineno |
| 416 | left = self.parse_pow() |
| 417 | while self.stream.current.type is 'mod': |
| 418 | self.stream.next() |
| 419 | right = self.parse_pow() |
| 420 | left = nodes.Mod(left, right, lineno=lineno) |
| 421 | lineno = self.stream.current.lineno |
| 422 | return left |
| 423 | |
| 424 | def parse_pow(self): |
| 425 | lineno = self.stream.current.lineno |
| 426 | left = self.parse_unary() |
| 427 | while self.stream.current.type is 'pow': |
| 428 | self.stream.next() |
| 429 | right = self.parse_unary() |
| 430 | left = nodes.Pow(left, right, lineno=lineno) |
| 431 | lineno = self.stream.current.lineno |
| 432 | return left |
| 433 | |
| 434 | def parse_unary(self): |
| 435 | token_type = self.stream.current.type |
| 436 | lineno = self.stream.current.lineno |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 437 | if token_type is 'name' and self.stream.current.value == 'not': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 438 | self.stream.next() |
| 439 | node = self.parse_unary() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 440 | return nodes.Not(node, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 441 | if token_type is 'sub': |
| 442 | self.stream.next() |
| 443 | node = self.parse_unary() |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 444 | return nodes.Neg(node, lineno=lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 445 | if token_type is 'add': |
| 446 | self.stream.next() |
| 447 | node = self.parse_unary() |
| 448 | return nodes.Pos(node, lineno=lineno) |
| 449 | return self.parse_primary() |
| 450 | |
| 451 | def parse_primary(self, parse_postfix=True): |
| 452 | token = self.stream.current |
| 453 | if token.type is 'name': |
| 454 | if token.value in ('true', 'false'): |
| 455 | node = nodes.Const(token.value == 'true', lineno=token.lineno) |
| 456 | elif token.value == 'none': |
| 457 | node = nodes.Const(None, lineno=token.lineno) |
| 458 | else: |
| 459 | node = nodes.Name(token.value, 'load', lineno=token.lineno) |
| 460 | self.stream.next() |
| 461 | elif token.type in ('integer', 'float', 'string'): |
| 462 | self.stream.next() |
| 463 | node = nodes.Const(token.value, lineno=token.lineno) |
| 464 | elif token.type is 'lparen': |
| 465 | self.stream.next() |
| 466 | node = self.parse_tuple() |
| 467 | self.stream.expect('rparen') |
| 468 | elif token.type is 'lbracket': |
| 469 | node = self.parse_list() |
| 470 | elif token.type is 'lbrace': |
| 471 | node = self.parse_dict() |
| 472 | else: |
| 473 | raise TemplateSyntaxError("unexpected token '%s'" % |
| 474 | (token,), token.lineno, |
| 475 | self.filename) |
| 476 | if parse_postfix: |
| 477 | node = self.parse_postfix(node) |
| 478 | return node |
| 479 | |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 480 | def parse_tuple(self, enforce=False, simplified=False, no_condexpr=False): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 481 | """Parse multiple expressions into a tuple. This can also return |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 482 | just one expression which is not a tuple. If you want to enforce |
| 483 | a tuple, pass it enforce=True (currently unused). |
| 484 | """ |
| 485 | lineno = self.stream.current.lineno |
Armin Ronacher | 3d8b784 | 2008-04-13 13:16:50 +0200 | [diff] [blame] | 486 | if simplified: |
| 487 | parse = self.parse_primary |
| 488 | elif no_condexpr: |
| 489 | parse = lambda: self.parse_expression(no_condexpr=True) |
| 490 | else: |
| 491 | parse = self.parse_expression |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 492 | args = [] |
| 493 | is_tuple = False |
| 494 | while 1: |
| 495 | if args: |
| 496 | self.stream.expect('comma') |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 497 | if self.is_tuple_end(): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 498 | break |
| 499 | args.append(parse()) |
Armin Ronacher | b5124e6 | 2008-04-25 00:36:14 +0200 | [diff] [blame] | 500 | if self.stream.current.type is 'comma': |
| 501 | is_tuple = True |
| 502 | else: |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 503 | break |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 504 | lineno = self.stream.current.lineno |
| 505 | if not is_tuple and args: |
| 506 | if enforce: |
| 507 | raise TemplateSyntaxError('tuple expected', lineno, |
| 508 | self.filename) |
| 509 | return args[0] |
| 510 | return nodes.Tuple(args, 'load', lineno=lineno) |
| 511 | |
| 512 | def parse_list(self): |
| 513 | token = self.stream.expect('lbracket') |
| 514 | items = [] |
| 515 | while self.stream.current.type is not 'rbracket': |
| 516 | if items: |
| 517 | self.stream.expect('comma') |
| 518 | if self.stream.current.type == 'rbracket': |
| 519 | break |
| 520 | items.append(self.parse_expression()) |
| 521 | self.stream.expect('rbracket') |
| 522 | return nodes.List(items, lineno=token.lineno) |
| 523 | |
| 524 | def parse_dict(self): |
| 525 | token = self.stream.expect('lbrace') |
| 526 | items = [] |
| 527 | while self.stream.current.type is not 'rbrace': |
| 528 | if items: |
| 529 | self.stream.expect('comma') |
| 530 | if self.stream.current.type == 'rbrace': |
| 531 | break |
| 532 | key = self.parse_expression() |
| 533 | self.stream.expect('colon') |
| 534 | value = self.parse_expression() |
| 535 | items.append(nodes.Pair(key, value, lineno=key.lineno)) |
| 536 | self.stream.expect('rbrace') |
Armin Ronacher | be4ae24 | 2008-04-18 09:49:08 +0200 | [diff] [blame] | 537 | return nodes.Dict(items, lineno=token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 538 | |
| 539 | def parse_postfix(self, node): |
| 540 | while 1: |
| 541 | token_type = self.stream.current.type |
| 542 | if token_type is 'dot' or token_type is 'lbracket': |
| 543 | node = self.parse_subscript(node) |
| 544 | elif token_type is 'lparen': |
| 545 | node = self.parse_call(node) |
| 546 | elif token_type is 'pipe': |
| 547 | node = self.parse_filter(node) |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 548 | elif token_type is 'name' and self.stream.current.value == 'is': |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 549 | node = self.parse_test(node) |
| 550 | else: |
| 551 | break |
| 552 | return node |
| 553 | |
| 554 | def parse_subscript(self, node): |
| 555 | token = self.stream.next() |
| 556 | if token.type is 'dot': |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 557 | attr_token = self.stream.current |
| 558 | if attr_token.type not in ('name', 'integer'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 559 | raise TemplateSyntaxError('expected name or number', |
Armin Ronacher | e791c2a | 2008-04-07 18:39:54 +0200 | [diff] [blame] | 560 | attr_token.lineno, self.filename) |
| 561 | arg = nodes.Const(attr_token.value, lineno=attr_token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 562 | self.stream.next() |
| 563 | elif token.type is 'lbracket': |
| 564 | args = [] |
| 565 | while self.stream.current.type is not 'rbracket': |
| 566 | if args: |
| 567 | self.stream.expect('comma') |
| 568 | args.append(self.parse_subscribed()) |
| 569 | self.stream.expect('rbracket') |
| 570 | if len(args) == 1: |
| 571 | arg = args[0] |
| 572 | else: |
Benjamin Wiegand | a315274 | 2008-04-28 18:07:52 +0200 | [diff] [blame] | 573 | arg = nodes.Tuple(args, self.lineno, self.filename) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 574 | else: |
| 575 | raise TemplateSyntaxError('expected subscript expression', |
| 576 | self.lineno, self.filename) |
| 577 | return nodes.Subscript(node, arg, 'load', lineno=token.lineno) |
| 578 | |
| 579 | def parse_subscribed(self): |
| 580 | lineno = self.stream.current.lineno |
| 581 | |
| 582 | if self.stream.current.type is 'colon': |
| 583 | self.stream.next() |
| 584 | args = [None] |
| 585 | else: |
| 586 | node = self.parse_expression() |
| 587 | if self.stream.current.type is not 'colon': |
| 588 | return node |
| 589 | self.stream.next() |
| 590 | args = [node] |
| 591 | |
| 592 | if self.stream.current.type is 'colon': |
| 593 | args.append(None) |
| 594 | elif self.stream.current.type not in ('rbracket', 'comma'): |
| 595 | args.append(self.parse_expression()) |
| 596 | else: |
| 597 | args.append(None) |
| 598 | |
| 599 | if self.stream.current.type is 'colon': |
| 600 | self.stream.next() |
| 601 | if self.stream.current.type not in ('rbracket', 'comma'): |
| 602 | args.append(self.parse_expression()) |
| 603 | else: |
| 604 | args.append(None) |
| 605 | else: |
| 606 | args.append(None) |
| 607 | |
| 608 | return nodes.Slice(lineno=lineno, *args) |
| 609 | |
| 610 | def parse_call(self, node): |
| 611 | token = self.stream.expect('lparen') |
| 612 | args = [] |
| 613 | kwargs = [] |
| 614 | dyn_args = dyn_kwargs = None |
| 615 | require_comma = False |
| 616 | |
| 617 | def ensure(expr): |
| 618 | if not expr: |
| 619 | raise TemplateSyntaxError('invalid syntax for function ' |
| 620 | 'call expression', token.lineno, |
| 621 | self.filename) |
| 622 | |
| 623 | while self.stream.current.type is not 'rparen': |
| 624 | if require_comma: |
| 625 | self.stream.expect('comma') |
| 626 | # support for trailing comma |
| 627 | if self.stream.current.type is 'rparen': |
| 628 | break |
| 629 | if self.stream.current.type is 'mul': |
| 630 | ensure(dyn_args is None and dyn_kwargs is None) |
| 631 | self.stream.next() |
| 632 | dyn_args = self.parse_expression() |
| 633 | elif self.stream.current.type is 'pow': |
| 634 | ensure(dyn_kwargs is None) |
| 635 | self.stream.next() |
| 636 | dyn_kwargs = self.parse_expression() |
| 637 | else: |
| 638 | ensure(dyn_args is None and dyn_kwargs is None) |
| 639 | if self.stream.current.type is 'name' and \ |
| 640 | self.stream.look().type is 'assign': |
| 641 | key = self.stream.current.value |
| 642 | self.stream.skip(2) |
Armin Ronacher | 0611e49 | 2008-04-25 23:44:14 +0200 | [diff] [blame] | 643 | value = self.parse_expression() |
| 644 | kwargs.append(nodes.Keyword(key, value, |
| 645 | lineno=value.lineno)) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 646 | else: |
| 647 | ensure(not kwargs) |
| 648 | args.append(self.parse_expression()) |
| 649 | |
| 650 | require_comma = True |
| 651 | self.stream.expect('rparen') |
| 652 | |
| 653 | if node is None: |
| 654 | return args, kwargs, dyn_args, dyn_kwargs |
| 655 | return nodes.Call(node, args, kwargs, dyn_args, dyn_kwargs, |
| 656 | lineno=token.lineno) |
| 657 | |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 658 | def parse_filter(self, node, start_inline=False): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 659 | lineno = self.stream.current.type |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 660 | while self.stream.current.type == 'pipe' or start_inline: |
| 661 | if not start_inline: |
| 662 | self.stream.next() |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 663 | token = self.stream.expect('name') |
| 664 | if self.stream.current.type is 'lparen': |
| 665 | args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None) |
| 666 | else: |
| 667 | args = [] |
| 668 | kwargs = [] |
| 669 | dyn_args = dyn_kwargs = None |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 670 | node = nodes.Filter(node, token.value, args, kwargs, dyn_args, |
| 671 | dyn_kwargs, lineno=token.lineno) |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 672 | start_inline = False |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 673 | return node |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 674 | |
| 675 | def parse_test(self, node): |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 676 | token = self.stream.next() |
| 677 | if self.stream.current.test('name:not'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 678 | self.stream.next() |
| 679 | negated = True |
| 680 | else: |
| 681 | negated = False |
| 682 | name = self.stream.expect('name').value |
Armin Ronacher | 10f3ba2 | 2008-04-18 11:30:37 +0200 | [diff] [blame] | 683 | dyn_args = dyn_kwargs = None |
| 684 | kwargs = [] |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 685 | if self.stream.current.type is 'lparen': |
| 686 | args, kwargs, dyn_args, dyn_kwargs = self.parse_call(None) |
| 687 | elif self.stream.current.type in ('name', 'string', 'integer', |
| 688 | 'float', 'lparen', 'lbracket', |
Armin Ronacher | 115de2e | 2008-05-01 22:20:05 +0200 | [diff] [blame] | 689 | 'lbrace'): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 690 | args = [self.parse_expression()] |
| 691 | else: |
| 692 | args = [] |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 693 | node = nodes.Test(node, name, args, kwargs, dyn_args, |
| 694 | dyn_kwargs, lineno=token.lineno) |
| 695 | if negated: |
Armin Ronacher | 9a82205 | 2008-04-17 18:44:07 +0200 | [diff] [blame] | 696 | node = nodes.Not(node, lineno=token.lineno) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 697 | return node |
| 698 | |
| 699 | def subparse(self, end_tokens=None): |
| 700 | body = [] |
| 701 | data_buffer = [] |
| 702 | add_data = data_buffer.append |
| 703 | |
| 704 | def flush_data(): |
| 705 | if data_buffer: |
| 706 | lineno = data_buffer[0].lineno |
| 707 | body.append(nodes.Output(data_buffer[:], lineno=lineno)) |
| 708 | del data_buffer[:] |
| 709 | |
| 710 | while self.stream: |
| 711 | token = self.stream.current |
| 712 | if token.type is 'data': |
Armin Ronacher | fa865fb | 2008-04-12 22:11:53 +0200 | [diff] [blame] | 713 | if token.value: |
| 714 | add_data(nodes.Const(token.value, lineno=token.lineno)) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 715 | self.stream.next() |
| 716 | elif token.type is 'variable_begin': |
| 717 | self.stream.next() |
Armin Ronacher | b5124e6 | 2008-04-25 00:36:14 +0200 | [diff] [blame] | 718 | add_data(self.parse_tuple()) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 719 | self.stream.expect('variable_end') |
| 720 | elif token.type is 'block_begin': |
| 721 | flush_data() |
| 722 | self.stream.next() |
| 723 | if end_tokens is not None and \ |
Armin Ronacher | cda43df | 2008-05-03 17:10:05 +0200 | [diff] [blame^] | 724 | self.stream.current.test_any(*end_tokens): |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 725 | return body |
Armin Ronacher | 32a910f | 2008-04-26 23:21:03 +0200 | [diff] [blame] | 726 | body.append(self.parse_statement()) |
Armin Ronacher | 82b3f3d | 2008-03-31 20:01:08 +0200 | [diff] [blame] | 727 | self.stream.expect('block_end') |
| 728 | else: |
| 729 | raise AssertionError('internal parsing error') |
| 730 | |
| 731 | flush_data() |
| 732 | return body |
| 733 | |
| 734 | def parse(self): |
| 735 | """Parse the whole template into a `Template` node.""" |
Armin Ronacher | d55ab53 | 2008-04-09 16:13:39 +0200 | [diff] [blame] | 736 | result = nodes.Template(self.subparse(), lineno=1) |
| 737 | result.set_environment(self.environment) |
| 738 | return result |