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This is the central parsing class Jinja uses. It's passed to
extensions and can be used to parse expressions or statements.
Nr )Ú environmentÚsourceÚnameÚfilenameÚstateÚreturnc C st || _ |j||||| _|| _|| _d| _i | _x,|j D ] }x|jD ]}|j | j|< qFW q:W d| _
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r! Ú _tokenizeÚstreamr# r$ ÚclosedÚ
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N)r( Úcurrentr7 r# r$ )r0 r6 r7 r8 r3 r3 r4 ÚfailJ s
z Parser.fail.)r# Úend_token_stackr7 r& c C sÔ t }x |D ]}|jtt| q W |rDdjtttt|d
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zParser._fail_ut_eof)r# r7 r& c C s | j || j| dS )z¤Called if the parser encounters an unknown tag. Tries to fail
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N)rG r/ )r0 r# r7 r3 r3 r4 Úfail_unknown_tag s zParser.fail_unknown_tag)Ú
end_tokensr7 r& c C s. t | j}|dk r |j| | jd|| dS )z9Like fail_unknown_tag but for end of template situations.N)Úlistr/ rC rG )r0 rI r7 Ústackr3 r3 r4 Úfail_eof s
zParser.fail_eof)Úextra_end_rulesr& c C s, | j jjdkrdS |dk r(| j jj|S dS )z Are we at the end of a tuple?Ú variable_endÚ block_endÚrparenTNF)rN rO rP )r( r9 ÚtypeÚtest_any)r0 rM r3 r3 r4 Ú is_tuple_end s
zParser.is_tuple_end)r7 r& c C s8 | j d7 _ tjtj}tjj|d| j |d |S )zDReturn a new free identifier as :class:`~jinja2.nodes.InternalName`.r Úfi)r7 )r- ÚobjectÚ__new__r Ú InternalNameÚNoder5 )r0 r7 Úrvr3 r3 r4 Úfree_identifier s zParser.free_identifier)r& c
C sÒ | j j}|jdkr | jd|j | jj|j d}z|jtkrZt | d| j jj }| S |jdkrl| j
S |jdkr~| j S | j j
|j}|dk r|| S | jj d}| j|j|j W d|rÌ| jj X dS ) zParse a single statement.r# ztag name expectedTZparse_ÚcallÚfilterNF)r( r9 rQ r: r7 r. rC ÚvalueÚ_statement_keywordsÚgetattrÚparse_call_blockÚparse_filter_blockr* ÚgetÚpoprH )r0 ÚtokenZpop_tagÚfÚextr3 r3 r4 Úparse_statement¥ s*
zParser.parse_statementF)rI Ú drop_needler& c C sL | j jd | j jd | j|}| j jjdkr:| j| |rHt| j |S )aR 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.
ÚcolonrO Úeof)r( Úskip_ifÚexpectÚsubparser9 rQ rL Únext)r0 rI rh Úresultr3 r3 r4 Úparse_statements s
zParser.parse_statementsc C sf t | jj}| jdd}| jjdr<| j }tj|||dS | jd}| j ddd}tj
||||dS ) zParse an assign statement.T)Úwith_namespaceÚassign)r7 Nú name:endset)rh )rs ) rn r( r7 Úparse_assign_targetrk Ú parse_tupler ÚAssignÚ parse_filterrp Ú AssignBlock)r0 r7 ÚtargetÚexprZ filter_nodeÚbodyr3 r3 r4 Ú parse_setß s
zParser.parse_setc C s | j jdj}| jdd}| j jd | jddd}d}| j jdrL| j }| j jd}| jd}t| j j d krxg }n| jdd d
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j |||||||dS )zParse a for loop.zname:forúname:in)rM Fúname:recursive)Ú
with_condexprrM Nzname:ifú name:endforú name:elseZendforT)rh )r7 )r} )r~ )r r )r ) r( rl r7 rt ru rk Úparse_expressionrp rn r] r ÚFor)r0 r7 ry ÚiterÚtestÚ recursiver{ Úelse_r3 r3 r4 Ú parse_forê s
zParser.parse_forc C s t j| jjdjd }}x|| jdd|_| jd
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t | j}|jdrxt j| jj jd}|j j
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name:endifT)rh )r r r )r )r ÚIfr( rl r7 ru r
rp r{ Zelif_r rn r9 rC )r0 Únodero rd r3 r3 r4 Úparse_ifý s
zParser.parse_ifc C s t jt| jjd}g }g }xX| jjjdkrt|r<| jjd | j }|j d |j
| | jjd |j
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N)r7 rO ÚcommaÚparamrr ú name:endwithT)rh )r )r ÚWithrn r( r7 r9 rQ rl rt Úset_ctxrC r ÚtargetsÚvaluesrp r{ )r0 r r r ry r3 r3 r4 Ú
parse_with s
zParser.parse_withc C sD t jt| jjd}t jd| j g|_| jddd|_ t j
|gS )N)r7 r úname:endautoescapeT)rh )r ) r ZScopedEvalContextModifierrn r( r7 ÚKeywordr Úoptionsrp r{ ÚScope)r0 r r3 r3 r4 Úparse_autoescape s zParser.parse_autoescapec C s¤ t jt| jjd}| jjdj|_| jjd|_ | jjd|_
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d | jjd
|j |S )N)r7 r# z name:scopedz
name:requiredr zpBlock names in Jinja have to be valid Python identifiers and may not contain hyphens, use an underscore instead.ú
name:endblockT)rh c s s0 | ](}|j D ] }t|t jo$|jj V q qd S )N)r Ú
isinstanceÚ TemplateDataÚdataÚisspace)Ú.0r{ Úchildr3 r3 r4 ú <genexpr>; s z%Parser.parse_block.<locals>.<genexpr>z7Required blocks can only contain comments or whitespacezname:)r )r ÚBlockrn r( r7 rl r] r# rk ÚscopedÚrequiredr9 rQ r: rp r{ Úall)r0 r r3 r3 r4 Ú parse_block& s
zParser.parse_blockc C s" t jt| jjd}| j |_|S )N)r7 )r ÚExtendsrn r( r7 r Útemplate)r0 r r3 r3 r4 Ú
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zParser.parse_extends)r Údefaultr& c C sH | j jjddr>| j j jdr>t| j jdk|_| j j n||_|S )Nz name:withz name:withoutz name:contextr ) r( r9 rR Úlookr
rn r] Ú with_contextÚskip)r0 r r¬ r3 r3 r4 Úparse_import_contextI s zParser.parse_import_contextc C sb t jt| jjd}| j |_| jjjdrP| jj jdrPd|_
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| j |dS )N)r7 z name:ignorez name:missingTé F)
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r Zignore_missingr¯ r° )r0 r r3 r3 r4 Ú
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zParser.parse_includec C sF t jt| jjd}| j |_| jjd | jddj |_
| j |dS )N)r7 zname:asT)Ú name_onlyF) r ÚImportrn r( r7 r rª rl rt r# ry r° )r0 r r3 r3 r4 Ú parse_importa s
zParser.parse_importc s t jtjjd j _jjd g _t d fdd }x¶ jrXjjd jj
j dkrì| rnP j dd }|j
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| sèjj
j dkrøP qFjjd qFW t dsd _ S )N)r7 z name:import)r& c sB j jjdkr>j j jdr>tj jdk _j j dS dS )Nr Úwithoutz name:contextTF> r r· )r( r9 r] r r
rn r® r¯ r3 )r r0 r3 r4 Ú
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z(Parser.parse_from.<locals>.parse_contextr r# T)r´ Ú_z4names starting with an underline can not be imported)r8 zname:asr® F)r Ú
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parse_fromh s6
zParser.parse_from)r r& c C s g }|_ g }|_| jjd xl| jjjdkr|r@| jjd | jdd}|jd | jjdrr|j | j
n|r| j d |j | q"W | jjd d S ) NÚlparenrP r T)r´ r rr z-non-default argument follows default argument) ÚargsÚdefaultsr( rl r9 rQ rt r rk rC r r: )r0 r r rà Úargr3 r3 r4 Úparse_signature s
zParser.parse_signaturec C sv t jt| jjd}| jjjdkr.| j| n g |_g |_ | j
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expected callú name:endcallT)rh )rÆ )r Ú CallBlockrn r( r7 r9 rQ rÅ r rà r r ÚCallr: r[ rp r{ )r0 r Z call_noder3 r3 r4 r` ¦ s zParser.parse_call_blockc C s8 t jt| jjd}| jd dd|_| jddd|_|S )N)r7 T)Ú start_inlineúname:endfilter)rh )rÊ ) r Ú FilterBlockrn r( r7 rw r\ rp r{ )r0 r r3 r3 r4 ra µ s zParser.parse_filter_blockc C sB t jt| jjd}| jddj|_| j| | jddd|_ |S )N)r7 T)r´ ú
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r ÚMacrorn r( r7 rt r# rÅ rp r{ )r0 r r3 r3 r4 Ú parse_macro» s
zParser.parse_macroc C sT t jt| jjd}g |_ x4| jjjdkrN|j r<| jjd |j j| j q W |S )N)r7 rO r )
r ÚOutputrn r( r7 r9 rQ rl rC r )r0 r r3 r3 r4 Ú parse_print s zParser.parse_printzte.Literal[True])Ú
with_tupler´ r& c C s d S )Nr3 )r0 rÑ r´ r3 r3 r4 rt Ë s zParser.parse_assign_targetT)rÑ r´ rM rq r& c C s d S )Nr3 )r0 rÑ r´ rM rq r3 r3 r4 rt Ñ s c C sÄ |rN| j j jdkrN| j jd}t| j | j jd}tj|j|j|jd}nL|rt| j jd}tj |jd|jd}n&|r| j
d|d}n| j }|j d |j
sÀ| jdt|jj |j |S )a Parse an assignment target. As Jinja 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. If
`with_namespace` is enabled, a namespace assignment may be parsed.
Údotr# )r7 ÚstoreT)Ú
simplifiedrM zcan't assign to )r( r rQ rl rn r ÚNSRefr] r7 ÚNameru Ú
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can_assignr: Ú__name__Úlower)r0 rÑ r´ rM rq rd Úattrry r3 r3 r4 rt Û s"
)r r& c C s |r | j S | j S )zºParse an expression. Per default all expressions are parsed, if
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)Úparse_condexprÚparse_or)r0 r r3 r3 r4 r s zParser.parse_expressionc C sf | j jj}| j }xN| j jdr`| j }| j jdr>| j }nd }tj||||d}| j jj}qW |S )Nzname:ifz name:else)r7 )r( r9 r7 rÜ rk rÛ r ZCondExpr)r0 r7 Zexpr1Zexpr2Zexpr3r3 r3 r4 rÛ s
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zParser.parse_orc C sJ | j jj}| j }x2| j jdrD| j }tj|||d}| j jj}qW |S )Nzname:and)r7 )r( r9 r7 Ú parse_notrk r ÚAnd)r0 r7 rß rà r3 r3 r4 rÝ & s
zParser.parse_andc C s4 | j jjdr,t| j j}tj| j |dS | j S )Nzname:not)r7 ) r( r9 r
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d |jtj d| j nP | j jj}qW |sÊ|S tj|||dS )Nzname:inÚinzname:notr± Únotin)r7 )r( r9 r7 Ú parse_math1rQ Ú_compare_operatorsrn rC r ZOperandrk r
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zParser.parse_comparec C sb | j jj}| j }xJ| j jjdkr\t| j jj }t| j | j }||||d}| j jj}qW |S )Nr r )r7 )r r )r( r9 r7 Ú parse_concatrQ Ú _math_nodesrn )r0 r7 rß Úclsrà r3 r3 r4 rç L s
zParser.parse_math1c C sb | j jj}| j g}x*| j jjdkr>t| j |j| j qW t|dkrT|d S tj ||dS )NÚtilder r )r7 )
r( r9 r7 Ú parse_math2rQ rn rC Úlenr ZConcat)r0 r7 r r3 r3 r4 rì W s
zParser.parse_concatc C sb | j jj}| j }xJ| j jjdkr\t| j jj }t| j | j }||||d}| j jj}qW |S )Nr r r r )r7 )r r r r )r( r9 r7 Ú parse_powrQ rí rn )r0 r7 rß rî rà r3 r3 r4 rð a s
zParser.parse_math2c C sV | j jj}| j }x>| j jjdkrPt| j | j }tj|||d}| j jj}qW |S )NÚpow)r7 )r( r9 r7 Ú parse_unaryrQ rn r ÚPow)r0 r7 rß rà r3 r3 r4 rò l s
zParser.parse_pow)Ú with_filterr& c C s | j jj}| j jj}|dkr<t| j tj| jd|d}n0|dkrdt| j tj| jd|d}n| j }| j
|}|r| j |}|S )Nr F)r7 r ) r( r9 rQ r7 rn r ZNegrô ZPosr× Ú
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zParser.parse_unaryc C sz | j j}|jdkrr|jdkr4tj|jdk|jd}n0|jdkrPtjd |jd}ntj|jd |jd}t| j n|jd
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||d}n|jdkrt| j tj|j|jd}nt|jdkr2t| j | j dd}| j j d nD|jdkrH| j
}n.|jdkr^| j }n| jdt||j |S )Nr# ÚtrueÚfalseÚTrueÚFalse)r7 ÚnoneÚNoneÚloadÚstringÚ ÚintegerÚfloatrÁ T)Úexplicit_parenthesesrP ÚlbracketÚlbracez unexpected )rù rú rû rü )rù rû )rý rþ )r r )r( r9 rQ r] r ÚConstr7 rÖ rn rC rA ru rl Ú
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|d |d
S ) a© Works like `parse_expression` but if multiple expressions are
delimited by a comma a :class:`~jinja2.nodes.Tuple` node is created.
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if no commas where found.
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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']``.
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expression in parentheses. This is used to figure out if an empty
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)r& c s j ddS )NF)r )r r3 )r0 r3 r4 r, Ê s z!Parser.parse_tuple.<locals>.parseFr Tr z Expected an expression, got rÿ )r7 )r( r9 r7 r× r r ÚExprrl rS rC rQ r: r ÚTuple) r0 rÔ r rM r r7 r, r Zis_tupler3 )r0 r4 ru ª s2
zParser.parse_tuplec C sn | j jd}g }x@| j jjdkrP|r0| j jd | j jjdkr@P |j| j qW | j jd tj||jdS )Nr Úrbracketr )r7 ) r( rl r9 rQ rC r r ÚListr7 )r0 rd Úitemsr3 r3 r4 r ì s zParser.parse_listc C s | j jd}g }xf| j jjdkrv|r0| j jd | j jjdkr@P | j }| j jd | j }|jtj|||jd qW | j jd tj ||jdS )Nr Zrbracer ri )r7 )
r( rl r9 rQ r rC r ZPairr7 ÚDict)r0 rd r Úkeyr] r3 r3 r4 r ø s zParser.parse_dictc C sF x@| j jj}|dks |dkr(| j|}q|dkr<| j|}qP qW |S )NrÒ r rÁ )r( r9 rQ Úparse_subscriptÚ
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zParser.parse_postfixc C s` xZ| j jj}|dkr | j|}q|dkrB| j jjdkrB| j|}q|dkrV| j|}qP qW |S )NÚpiper# ÚisrÁ )r( r9 rQ rw r] Ú
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zParser.parse_filter_exprc C s t | j}|jdkr| jj}t | j |jdkrFtj||jd|jdS |jdkr^| jd|j tj |j|jd}tj
||d|jdS |jdkrg }x0| jjjdkrÄ|r´| jj d |j | j
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r r r z expected subscript expression)rn r( rQ r9 r ÚGetattrr] r7 r: r ÚGetitemrl rC Úparse_subscribedrñ r )r0 r rd Z
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zParser.parse_subscribedc s~ j jdg }g }d }d }d}td d fdd }x, j jjdkrd|rj j jd j jjdkrjP j jjdkr ||d ko|d k t j j }n¾ j jjd krÎ||d k t j j }n j jjd
koê j j jd kr2||d k j jj} j j d j }|j
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j d}q:W j jd ||||fS )NrÁ F)rz r& c s | s j dj d S )Nz+invalid syntax for function call expression)r: r7 )rz )r0 rd r3 r4 Úensurej s z&Parser.parse_call_args.<locals>.ensurerP r r ró r# rr r± )r7 T)r( rl r¼ r9 rQ rn r r r] r¯ rC r r r7 ) r0 r ÚkwargsÚdyn_argsÚ
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C s& t | j}| jjjdr(t | j d}nd}| jjdj}x2| jjjdkrlt | j |d| jjdj 7 }q<W d }}g }| jjjdkr| j \}}}}nX| jjjdkrî| jjjd
dd rî| jjjdrÔ| j d | j
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|||||||jd}|r"t j||jd}|S )Nzname:notTFr# rÒ r< rÁ r r r r r z name:elsezname:orzname:andzname:isz'You cannot chain multiple tests with is)r7 > r rÁ r r r# r r )rn r( r9 r
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