def parse_primary(self):
token = self.stream.current
if token.type == "name":
if token.value in ("true", "false", "True", "False"):
node = nodes.Const(token.value in ("true", "True"),
lineno=token.lineno)
elif token.value in ("none", "None"):
node = nodes.Const(None, lineno=token.lineno)
else:
node = nodes.Name(token.value, "load", lineno=token.lineno)
next(self.stream)
elif token.type == "string":
next(self.stream)
buf = [token.value]
lineno = token.lineno
while self.stream.current.type == "string":
buf.append(self.stream.current.value)
next(self.stream)
node = nodes.Const("".join(buf), lineno=lineno)
elif token.type in ("integer", "float"):
next(self.stream)
node = nodes.Const(token.value, lineno=token.lineno)
elif token.type == "lparen":
next(self.stream)
node = self.parse_tuple(explicit_parentheses=True)
self.stream.expect("rparen")
elif token.type == "lbracket":
node = self.parse_list()
elif token.type == "lbrace":
node = self.parse_dict()
else:
self.fail("unexpected '%s'" % describe_token(token), token.lineno)
return node
def parse_primary(self):
token = self.stream.current
if token.type == 'name':
if token.value in ('true', 'false', 'True', 'False'):
node = nodes.Const(token.value in ('true', 'True'),
lineno=token.lineno)
elif token.value in ('none', 'None'):
node = nodes.Const(None, lineno=token.lineno)
else:
node = nodes.Name(token.value, 'load', lineno=token.lineno)
next(self.stream)
elif token.type == 'string':
next(self.stream)
buf = [token.value]
lineno = token.lineno
while self.stream.current.type == 'string':
buf.append(self.stream.current.value)
next(self.stream)
node = nodes.Const(''.join(buf), lineno=lineno)
elif token.type in ('integer', 'float'):
next(self.stream)
node = nodes.Const(token.value, lineno=token.lineno)
elif token.type == 'lparen':
next(self.stream)
node = self.parse_tuple(explicit_parentheses=True)
self.stream.expect('rparen')
elif token.type == 'lbracket':
node = self.parse_list()
elif token.type == 'lbrace':
node = self.parse_dict()
else:
self.fail("unexpected '%s'" % describe_token(token), token.lineno)
return node
def filter_stream(self, stream):
verbose_depth = 0
first = True
while 1:
if (stream.current.type == 'block_begin' and stream.look().value
in ('whitespace', 'endwhitespace')):
next(stream)
if stream.current.value == 'whitespace':
verbose_depth += 1
else:
verbose_depth -= 1
if verbose_depth < 0:
raise self.error("Unexpected tag 'endverbose'")
next(stream)
if stream.current.type != 'block_end':
raise self.error(
"Unexpected token '%s', expected end of block" %
lexer.describe_token(stream.current), stream)
elif verbose_depth == 0 and stream.current.type == 'data':
# Reduce all whitespace to a single space
token = lexer.Token(
stream.current.lineno, "data",
self.WHITESPACE.sub(" ", stream.current.value))
# Special case to remove leading space before the doctype
# declaration in HTML documents
if first:
first = False
if token.value.lower().startswith(" <!doctype "):
token = lexer.Token(token.lineno, "data",
token.value[1:])
yield token
else:
yield stream.current
next(stream)
def parse_primary(self):
token = self.stream.current
if token.type == 'name':
if token.value in ('true', 'false', 'True', 'False'):
node = nodes.Const(token.value in ('true', 'True'),
lineno=token.lineno)
elif token.value in ('none', 'None'):
node = nodes.Const(None, lineno=token.lineno)
else:
node = nodes.Name(token.value, 'load', lineno=token.lineno)
next(self.stream)
elif token.type == 'string':
next(self.stream)
buf = [token.value]
lineno = token.lineno
while self.stream.current.type == 'string':
buf.append(self.stream.current.value)
next(self.stream)
node = nodes.Const(''.join(buf), lineno=lineno)
elif token.type in ('integer', 'float'):
next(self.stream)
node = nodes.Const(token.value, lineno=token.lineno)
elif token.type == 'lparen':
next(self.stream)
node = self.parse_tuple(explicit_parentheses=True)
self.stream.expect('rparen')
elif token.type == 'lbracket':
node = self.parse_list()
elif token.type == 'lbrace':
node = self.parse_dict()
else:
self.fail("unexpected '{0!s}'".format(describe_token(token)), token.lineno)
return node
def filter_stream(self, stream):
compressor = Compressor()
strip_depth = 0
while 1:
if stream.current.type == 'block_begin':
if stream.look().test('name:strip') or \
stream.look().test('name:endstrip'):
stream.skip()
if stream.current.value == 'strip':
strip_depth += 1
else:
strip_depth -= 1
if strip_depth < 0:
self.fail('Unexpected tag endstrip', stream, token)
stream.skip()
if stream.current.type != 'block_end':
self.fail('expected end of block, got %s' %
describe_token(stream.current), stream, token)
stream.skip()
if strip_depth > 0 and stream.current.type == 'data':
token = stream.current
try:
value = compressor.compress(token.value)
except CompressError as e:
self.fail(e.message, stream, token)
else:
yield Token(stream.current.lineno, 'data', value)
else:
yield stream.current
next(stream)
def filter_stream(self, stream):
ctx = StreamProcessContext(stream)
strip_depth = 0
while 1:
if stream.current.type == 'block_begin':
if stream.look().test('name:strip') or \
stream.look().test('name:endstrip'):
stream.skip()
if stream.current.value == 'strip':
strip_depth += 1
else:
strip_depth -= 1
if strip_depth < 0:
ctx.fail('Unexpected tag endstrip')
stream.skip()
if stream.current.type != 'block_end':
ctx.fail('expected end of block, got %s' %
describe_token(stream.current))
stream.skip()
if strip_depth > 0 and stream.current.type == 'data':
ctx.token = stream.current
value = self.normalize(ctx)
yield Token(stream.current.lineno, 'data', value)
else:
yield stream.current
stream.next()
def filter_stream(self, stream):
ctx = StreamProcessContext(stream)
strip_depth = 0
while True:
if stream.current.type == 'block_begin':
if stream.look().test('name:strip') or \
stream.look().test('name:endstrip'):
stream.skip()
if stream.current.value == 'strip':
strip_depth += 1
else:
strip_depth -= 1
if strip_depth < 0:
ctx.fail('Unexpected tag endstrip')
stream.skip()
if stream.current.type != 'block_end':
ctx.fail('expected end of block, got %s' %
describe_token(stream.current))
stream.skip()
if strip_depth > 0 and stream.current.type == 'data':
ctx.token = stream.current
value = self.normalize(ctx)
yield Token(stream.current.lineno, 'data', value)
else:
yield stream.current
next(stream)
def parse_tuple(self,
simplified=False,
with_condexpr=True,
extra_end_rules=None,
explicit_parentheses=False):
lineno = self.stream.current.lineno
if simplified:
parse = self.parse_primary
elif with_condexpr:
parse = self.parse_expression
else:
parse = lambda: self.parse_expression(with_condexpr=False)
args = []
is_tuple = False
while 1:
if args:
self.stream.expect('comma')
if self.is_tuple_end(extra_end_rules):
break
args.append(parse())
if self.stream.current.type == 'comma':
is_tuple = True
else:
break
lineno = self.stream.current.lineno
if not is_tuple:
if args:
return args[0]
if not explicit_parentheses:
self.fail("Expected an expression, got '%s'" %
describe_token(self.stream.current))
return nodes.Tuple(args, 'load', lineno=lineno)
def filter_stream(self, stream):
ctx = StreamProcessContext(stream)
strip_depth = 0
while True:
if stream.current.type == "block_begin":
if stream.look().test("name:strip") or stream.look().test(
"name:endstrip"):
stream.skip()
if stream.current.value == "strip":
strip_depth += 1
else:
strip_depth -= 1
if strip_depth < 0:
ctx.fail("Unexpected tag endstrip")
stream.skip()
if stream.current.type != "block_end":
ctx.fail("expected end of block, got %s" %
describe_token(stream.current))
stream.skip()
if strip_depth > 0 and stream.current.type == "data":
ctx.token = stream.current
value = self.normalize(ctx)
yield Token(stream.current.lineno, "data", value)
else:
yield stream.current
next(stream)
def describe_token(token):
from jinja2 import lexer
if token.type == lexer.TOKEN_EOF:
return "end of statement"
else:
return lexer.describe_token(token)
def filter_stream(self, stream):
verbose_depth = 0
first = True
while 1:
if stream.current.type == "block_begin" and stream.look().value in ("whitespace", "endwhitespace"):
next(stream)
if stream.current.value == "whitespace":
verbose_depth += 1
else:
verbose_depth -= 1
if verbose_depth < 0:
raise self.error("Unexpected tag 'endverbose'")
next(stream)
if stream.current.type != "block_end":
raise self.error(
"Unexpected token '%s', expected end of block" % lexer.describe_token(stream.current), stream
)
elif verbose_depth == 0 and stream.current.type == "data":
# Reduce all whitespace to a single space
token = lexer.Token(stream.current.lineno, "data", self.WHITESPACE.sub(" ", stream.current.value))
# Special case to remove leading space before the doctype
# declaration in HTML documents
if first:
first = False
if token.value.lower().startswith(" <!doctype "):
token = lexer.Token(token.lineno, "data", token.value[1:])
yield token
else:
yield stream.current
next(stream)
def parse_tuple(self, simplified = False, with_condexpr = True, extra_end_rules = None, explicit_parentheses = False):
lineno = self.stream.current.lineno
if simplified:
parse = self.parse_primary
elif with_condexpr:
parse = self.parse_expression
else:
parse = lambda : self.parse_expression(with_condexpr=False)
args = []
is_tuple = False
while 1:
if args:
self.stream.expect('comma')
if self.is_tuple_end(extra_end_rules):
break
args.append(parse())
if self.stream.current.type == 'comma':
is_tuple = True
else:
break
lineno = self.stream.current.lineno
if not is_tuple:
if args:
return args[0]
if not explicit_parentheses:
self.fail("Expected an expression, got '%s'" % describe_token(self.stream.current))
return nodes.Tuple(args, 'load', lineno=lineno)
def parse_tuple(
self,
simplified=False,
with_condexpr=True,
extra_end_rules=None,
explicit_parentheses=False,
):
"""Works like `parse_expression` but if multiple expressions are
delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
This method could also return a regular expression instead of a tuple
if no commas where found.
The default parsing mode is a full tuple. If `simplified` is `True`
only names and literals are parsed. The `no_condexpr` parameter is
forwarded to :meth:`parse_expression`.
Because tuples do not require delimiters and may end in a bogus comma
an extra hint is needed that marks the end of a tuple. For example
for loops support tuples between `for` and `in`. In that case the
`extra_end_rules` is set to ``['name:in']``.
`explicit_parentheses` is true if the parsing was triggered by an
expression in parentheses. This is used to figure out if an empty
tuple is a valid expression or not.
"""
lineno = self.stream.current.lineno
if simplified:
parse = self.parse_primary
elif with_condexpr:
parse = self.parse_expression
else:
parse = lambda: self.parse_expression(with_condexpr=False)
args = []
is_tuple = False
while 1:
if args:
self.stream.expect("comma")
if self.is_tuple_end(extra_end_rules):
break
args.append(parse())
if self.stream.current.type == "comma":
is_tuple = True
else:
break
lineno = self.stream.current.lineno
if not is_tuple:
if args:
return args[0]
# if we don't have explicit parentheses, an empty tuple is
# not a valid expression. This would mean nothing (literally
# nothing) in the spot of an expression would be an empty
# tuple.
if not explicit_parentheses:
self.fail("Expected an expression, got '%s'" %
describe_token(self.stream.current))
return nodes.Tuple(args, "load", lineno=lineno)
def parse_tuple(self, simplified=False, with_condexpr=True,
extra_end_rules=None, explicit_parentheses=False):
"""Works like `parse_expression` but if multiple expressions are
delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
This method could also return a regular expression instead of a tuple
if no commas where found.
The default parsing mode is a full tuple. If `simplified` is `True`
only names and literals are parsed. The `no_condexpr` parameter is
forwarded to :meth:`parse_expression`.
Because tuples do not require delimiters and may end in a bogus comma
an extra hint is needed that marks the end of a tuple. For example
for loops support tuples between `for` and `in`. In that case the
`extra_end_rules` is set to ``['name:in']``.
`explicit_parentheses` is true if the parsing was triggered by an
expression in parentheses. This is used to figure out if an empty
tuple is a valid expression or not.
"""
lineno = self.stream.current.lineno
if simplified:
parse = self.parse_primary
elif with_condexpr:
parse = self.parse_expression
else:
parse = lambda: self.parse_expression(with_condexpr=False)
args = []
is_tuple = False
while 1:
if args:
self.stream.expect('comma')
if self.is_tuple_end(extra_end_rules):
break
args.append(parse())
if self.stream.current.type == 'comma':
is_tuple = True
else:
break
lineno = self.stream.current.lineno
if not is_tuple:
if args:
return args[0]
# if we don't have explicit parentheses, an empty tuple is
# not a valid expression. This would mean nothing (literally
# nothing) in the spot of an expression would be an empty
# tuple.
if not explicit_parentheses:
self.fail('Expected an expression, got \'{0!s}\''.format(
describe_token(self.stream.current)))
return nodes.Tuple(args, 'load', lineno=lineno)
def _processToken(self, ctx, stream, test_token):
change = 0
if stream.look().test("name:%s" % test_token) or stream.look().test("name:end%s" % test_token):
stream.skip()
if stream.current.value == test_token:
change = 1
else:
change = -1
stream.skip()
if stream.current.type != "block_end":
ctx.fail("expected end of block, got %s" % describe_token(stream.current))
stream.skip()
return change
def parse(self, parser):
lineno = next(parser.stream).lineno
view_name = parser.stream.expect(lexer.TOKEN_STRING)
view_name = nodes.Const(view_name.value, lineno=view_name.lineno)
args = None
kwargs = None
as_var = None
while parser.stream.current.type != lexer.TOKEN_BLOCK_END:
token = parser.stream.current
if token.test('name:as'):
next(parser.stream)
token = parser.stream.expect(lexer.TOKEN_NAME)
as_var = nodes.Name(token.value, 'store', lineno=token.lineno)
break
if args is not None:
args.append(self.parse_expression(parser))
elif kwargs is not None:
if token.type != lexer.TOKEN_NAME:
parser.fail(
"got '{}', expected name for keyword argument"
"".format(lexer.describe_token(token)),
lineno=token.lineno
)
arg = token.value
next(parser.stream)
parser.stream.expect(lexer.TOKEN_ASSIGN)
token = parser.stream.current
kwargs[arg] = self.parse_expression(parser)
else:
if parser.stream.look().type == lexer.TOKEN_ASSIGN:
kwargs = {}
else:
args = []
continue
if args is None:
args = []
args.insert(0, view_name)
if kwargs is not None:
kwargs = [nodes.Keyword(key, val) for key, val in kwargs.items()]
call = self.call_method('_url_reverse', args, kwargs, lineno=lineno)
if as_var is None:
return nodes.Output([call], lineno=lineno)
else:
return nodes.Assign(as_var, call, lineno=lineno)
def _processToken(self, ctx, stream, test_token):
change = 0
if (stream.look().test('name:%s' % test_token)
or stream.look().test('name:end%s' % test_token)):
stream.skip()
if stream.current.value == test_token:
change = 1
else:
change = -1
stream.skip()
if stream.current.type != 'block_end':
ctx.fail('expected end of block, got %s' %
describe_token(stream.current))
stream.skip()
return change
def parse(self, parser):
lineno = next(parser.stream).lineno
view_name = parser.stream.expect(lexer.TOKEN_STRING)
view_name = nodes.Const(view_name.value, lineno=view_name.lineno)
args = None
kwargs = None
as_var = None
while parser.stream.current.type != lexer.TOKEN_BLOCK_END:
token = parser.stream.current
if token.test("name:as"):
next(parser.stream)
token = parser.stream.expect(lexer.TOKEN_NAME)
as_var = nodes.Name(token.value, "store", lineno=token.lineno)
break
if args is not None:
args.append(self.parse_expression(parser))
elif kwargs is not None:
if token.type != lexer.TOKEN_NAME:
parser.fail(
"got '{}', expected name for keyword argument" "".format(lexer.describe_token(token)),
lineno=token.lineno,
)
arg = token.value
next(parser.stream)
parser.stream.expect(lexer.TOKEN_ASSIGN)
token = parser.stream.current
kwargs[arg] = self.parse_expression(parser)
else:
if parser.stream.look().type == lexer.TOKEN_ASSIGN:
kwargs = {}
else:
args = []
continue
if args is None:
args = []
args.insert(0, view_name)
if kwargs is not None:
kwargs = [nodes.Keyword(key, val) for key, val in kwargs.items()]
call = self.call_method("_url_reverse", args, kwargs, lineno=lineno)
if as_var is None:
return nodes.Output([call], lineno=lineno)
else:
return nodes.Assign(as_var, call, lineno=lineno)
def describe_token(token):
from jinja2 import lexer
if token.type == lexer.TOKEN_EOF:
return 'end of statement'
else:
return lexer.describe_token(token)
