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jinja2.parser
~~~~~~~~~~~~~
Implements the template parser.
:copyright: (c) 2010 by the Jinja Team.
:license: BSD, see LICENSE for more details.
i����( t nodes( t TemplateSyntaxErrort TemplateAssertionError( t describe_tokent describe_token_expr( t nextt imapt fort ift blockt extendst printt macrot includet fromt importt sett eqt net ltt lteqt gtt gteqt Parserc B s$ e Z d Z d5 d5 d5 d � Z d5 e d � Z d � Z d5 d � Z d5 d5 d � Z d5 d � Z
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d1 � Z7 d2 � Z8 d5 d3 � Z9 d4 � Z: RS(6 s� This is the central parsing class Jinja2 uses. It's passed to
extensions and can be used to parse expressions or statements.
c C s� | | _ | j | | | | � | _ | | _ | | _ t | _ i | _ x8 | j � D]* } x! | j D] } | j
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d S( Ni ( t environmentt _tokenizet streamt namet filenamet Falset closedt
extensionst iter_extensionst tagst parset _last_identifiert
_tag_stackt _end_token_stack( t selfR t sourceR R t statet extensiont tag( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt __init__ s c C s= | d k r | j j j } n | | | | j | j � � d S( s� Convenience method that raises `exc` with the message, passed
line number or last line number as well as the current name and
filename.
N( t NoneR t currentt linenoR R ( R& t msgR. t exc( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt fail, s c C s g } x$ | D] } | j t t | � � q
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Ns or c s s | ] } d t | � Vq d S( s '%s'N( R ( t .0t expr( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pys <genexpr>; s i����s Unexpected end of template.s Encountered unknown tag '%s'.s_ You probably made a nesting mistake. Jinja is expecting this tag, but currently looking for %s.s- Jinja was looking for the following tags: %s.s4 The innermost block that needs to be closed is '%s'.t ( t extendR R t joinR, t appendR$ R1 ( R& R t end_token_stackR. t expectedt exprst currently_lookingt message( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt _fail_ut_eof5 s*
c C s | j | | j | � S( s� Called if the parser encounters an unknown tag. Tries to fail
with a human readable error message that could help to identify
the problem.
( R= R% ( R& R R. ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt fail_unknown_tagT s c C s> t | j � } | d k r+ | j | � n | j d | | � S( s9 Like fail_unknown_tag but for end of template situations.N( t listR% R, R7 R= ( R& t
end_tokensR. t stack( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt fail_eof[ s c C s< | j j j d k r t S| d k r8 | j j j | � St S( s Are we at the end of a tuple?t variable_endt block_endt rparen( RC RD RE N( R R- t typet TrueR, t test_anyR ( R& t extra_end_rules( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt is_tuple_endb s
c C sE | j d 7_ t j t j � } t j j | d | j d | �| S( sD Return a new free identifier as :class:`~jinja2.nodes.InternalName`.i s fi%dR. ( R# t objectt __new__R t InternalNamet NodeR+ ( R& R. t rv( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt free_identifierj s c C s | j j } | j d k r1 | j d | j � n | j j | j � t } z� | j t k ry t
| d | j j j � � S| j d k r� | j � S| j d k r� | j � S| j
j | j � } | d k r� | | � S| j j � t } | j | j | j � Wd | r| j j � n Xd S( s Parse a single statement.R s tag name expectedt parse_t callt filterN( R R- RF R1 R. R$ R7 t valueRG t _statement_keywordst getattrt parse_call_blockt parse_filter_blockR t getR, t popR R> ( R& t tokent pop_tagt ext( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_statementq s(
c C sn | j j d � | j j d � | j | � } | j j j d k rT | j | � n | rj t | j � n | S( sR Parse multiple statements into a list until one of the end tokens
is reached. This is used to parse the body of statements as it also
parses template data if appropriate. The parser checks first if the
current token is a colon and skips it if there is one. Then it checks
for the block end and parses until if one of the `end_tokens` is
reached. Per default the active token in the stream at the end of
the call is the matched end token. If this is not wanted `drop_needle`
can be set to `True` and the end token is removed.
t colonRD t eof( R t skip_ift expectt subparseR- RF RB R ( R& R@ t drop_needlet result( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_statements� s c C sP t | j � j } | j � } | j j d � | j � } t j | | d | �S( s Parse an assign statement.t assignR. ( R R R. t parse_assign_targetRb t parse_tupleR t Assign( R& R. t targetR3 ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_set� s
c C s� | j j d � j } | j d d � } | j j d � | j d t d d
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| j � j d k r� g } n | j d d
t �} t
j | | | | | | d | �S( s Parse a for loop.s name:forRI s name:int
with_condexprs name:recursives name:ifs name:endfors name:elset endforRd R. ( s name:in( s name:recursiveN( s name:endfors name:else( s name:endfor( R Rb R. Rh Ri R R, Ra t parse_expressionRf R RT RG R t For( R& R. Rk t itert testt recursivet bodyt else_( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_for� s c C s� t j d | j j d � j � } } x� | j d t � | _ | j d � | _ t
| j � } | j d � r� t j d | j j j � } | g | _ | } q( n3 | j d � r� | j d d t
�| _ n g | _ Pq( | S(
s Parse an if construct.R. s name:ifRm s name:elifs name:elses
name:endifRd ( s name:elifs name:elses
name:endif( s
name:endif( R t IfR Rb R. Ri R Rr Rf Rt R R- Ru RG ( R& t nodeRe R[ t new_node( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_if� s" % c C s� t j d t | j � j � } | j j d � j | _ | j j d � | _ | j j
j d k rp | j d � n | j
d d t �| _ | j j d | j � | S(
NR. R s name:scopedt subsp Block names in Jinja have to be valid Python identifiers and may not contain hyphens, use an underscore instead.s
name:endblockRd s name:( s
name:endblock( R t BlockR R R. Rb RT R Ra t scopedR- RF R1 Rf RG Rt ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_block� s c C s1 t j d t | j � j � } | j � | _ | S( NR. ( R t ExtendsR R R. Ro t template( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt
parse_extends� s c C sh | j j j d d � r[ | j j � j d � r[ t | j � j d k | _ | j j � n | | _ | S( Ns name:withs name:withouts name:contextt with( R R- RH t lookRr R RT t with_contextt skip( R& Rx t default( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_import_context� s c C s� t j d t | j � j � } | j � | _ | j j j d � rv | j j � j d � rv t
| _ | j j d � n t
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� S( NR. s name:ignores name:missingi ( R t IncludeR R R. Ro R� R- Rr R� RG t ignore_missingR� R R� ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt
parse_include� s c C se t j d t | j � j � } | j � | _ | j j d � | j d t � j
| _ | j | t
� S( NR. s name:ast name_only( R t ImportR R R. Ro R� Rb Rh RG R Rk R� R ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_import s
c s� t j d t � j � j � � � j � � _ � j j d � g � _ � � f d � } x� � j rw � j j d � n � j j j
d k rT| � r� Pn � j d t � } | j
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d k rUPqUq[ Pq[ t � d � s�t � _ � j j d � n � S( NR. s name:importc s] � j j j d k rY � j j � j d � rY t � j � j d k � _ � j j � t St S( NR� t withouts name:context( s withR� (
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FromImportR R R. Ro R� Rb t namesR- RF Rh RG R t
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| � q- W| j j d � d S( Nt lparenRE R� R� t paramRg ( t argst defaultsR Rb R- RF Rh RG t set_ctxRa R7 Ro ( R& Rx R� R� t arg( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_signature0 s
c C s� t j d t | j � j � } | j j j d k rC | j | � n g | _ g | _ | j
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expected calls name:endcallRd ( s name:endcall( R t CallBlockR R R. R- RF R� R� R� Ro RR t
isinstancet CallR1 Rf RG Rt ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyRW > s c C sR t j d t | j � j � } | j d d t �| _ | j d d t �| _
| S( NR. t start_inlines name:endfilterRd ( s name:endfilter( R t FilterBlockR R R. t parse_filterR, RG RS Rf Rt ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyRX L s
c C s_ t j d t | j � j � } | j d t � j | _ | j | � | j d d t �| _
| S( NR. R� s
name:endmacroRd ( s
name:endmacro( R t MacroR R R. Rh RG R R� Rf Rt ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_macroS s
c C sy t j d t | j � j � } g | _ xK | j j j d k rt | j r[ | j j d � n | j j | j � � q* W| S( NR. RD R� (
R t OutputR R R. R- RF Rb R7 Ro ( R& Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyt parse_print[ s c C s� | r9 | j j d � } t j | j d d | j �} n: | rZ | j d t d | � } n | j � } | j d � | j
� s� | j d | j j
j � | j � n | S( s� Parse an assignment target. As Jinja2 allows assignments to
tuples, this function can parse all allowed assignment targets. Per
default assignments to tuples are parsed, that can be disable however
by setting `with_tuple` to `False`. If only assignments to names are
wanted `name_only` can be set to `True`. The `extra_end_rules`
parameter is forwarded to the tuple parsing function.
R t storeR. t
simplifiedRI s can't assign to %r( R Rb R t NameRT R. Ri RG t
parse_primaryR� t
can_assignR1 t __class__t __name__t lower( R& t
with_tupleR� RI R[ Rk ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyRh d s !
c C s | r | j � S| j � S( s� Parse an expression. Per default all expressions are parsed, if
the optional `with_condexpr` parameter is set to `False` conditional
expressions are not parsed.
( t parse_condexprt parse_or( R& Rm ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyRo | s
c C s� | j j j } | j � } xs | j j d � r� | j � } | j j d � r] | j � } n d } t j | | | d | �} | j j j } q W| S( Ns name:ifs name:elseR. ( R R- R. R� Ra R� R, R t CondExpr( R& R. t expr1t expr2t expr3( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s c C sk | j j j } | j � } xI | j j d � rf | j � } t j | | d | �} | j j j } q W| S( Ns name:orR. ( R R- R. t parse_andRa R t Or( R& R. t leftt right( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s c C sk | j j j } | j � } xI | j j d � rf | j � } t j | | d | �} | j j j } q W| S( Ns name:andR. ( R R- R. t parse_notRa R t And( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s c C sJ | j j j d � r@ t | j � j } t j | j � d | �S| j � S( Ns name:notR. ( R R- Rr R R. R t NotR� t
parse_compare( R& R. ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s c C s4 | j j j } | j � } g } x� | j j j } | t k rn t | j � | j t j | | j � � � n� | j j
d � r� | j t j d | j � � � n` | j j j d � r| j j � j d � r| j j
d � | j t j d | j � � � n P| j j j } q$ | s | St j | | d | �S( Ns name:int ins name:noti t notinR. ( R R- R. t parse_addRF t _compare_operatorsR R7 R t OperandRa Rr R� R� t Compare( R& R. R3 t opst
token_type( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s&
"""c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt addR. ( R R- R. t parse_subRF R R t Add( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( NR{ R. ( R R- R. t parse_concatRF R R t Sub( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s� | j j j } | j � g } x9 | j j j d k rY t | j � | j | j � � q! Wt | � d k rt | d St j | d | �S( Nt tildei i R. (
R R- R. t parse_mulRF R R7 t lenR t Concat( R& R. R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt mulR. ( R R- R. t parse_divRF R R t Mul( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt divR. ( R R- R. t parse_floordivRF R R t Div( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt floordivR. ( R R- R. t parse_modRF R R t FloorDiv( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt modR. ( R R- R. t parse_powRF R R t Mod( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� � s
c C s{ | j j j } | j � } xY | j j j d k rv t | j � | j � } t j | | d | �} | j j j } q W| S( Nt powR. ( R R- R. t parse_unaryRF R R t Pow( R& R. R� R� ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� s
c C s� | j j j } | j j j } | d k rX t | j � t j | j t � d | �} nF | d k r� t | j � t j | j t � d | �} n | j
� } | j | � } | r� | j | � } n | S( NR{ R. R� (
R R- RF R. R R t NegR� R t PosR� t
parse_postfixt parse_filter_expr( R& t with_filterR� R. Rx ( ( s1 /usr/lib/python2.7/site-packages/jinja2/parser.pyR� s
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k r7t | j � | j g } | j } x< | j j j d
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| j j j � t | j � q� Wt j d j | � d | �} n� | j d k rqt | j � t j | j d | j �} n� | j d k r�t | j � | j d t
� } | j j d � nY | j d k r�| j � } n; | j d k r�| j � } n | j d t | � | j � | S( NR t truet falseRG R R. t noneR, t loadt stringt t integert floatR� t explicit_parenthesesRE t lbrackett lbraces unexpected '%s'( R� R� s Trues False( R� s True( R� s None( R� s float( R R- RF RT R t ConstR. R, R� R R7 R6 Ri RG Rb t
parse_listt
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c s � j j j } | r! � j } n! | r3 � j } n � f d � } g } t } xm | rj � j j d � n � j | � r} Pn | j | � � � j j j d k r� t
} n P� j j j } qQ | s� | r� | d S| s� � j d t � j j � � q� n t
j | d d | �S( s� 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.
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