!w:[�� � @ sf d d g Z d d l m Z d d l TGd d � d e � Z Gd d � d � Z Gd d � d � Z d S)
�Scanner� ScannerError� )�MarkedYAMLError)�*c @ s e Z d Z d S)r N)�__name__�
__module__� __qualname__� r r � /scanner.pyr s c @ s e Z d Z d d � Z d S)� SimpleKeyc C s: | | _ | | _ | | _ | | _ | | _ | | _ d S)N)� token_number�required�index�line�column�mark)�selfr r
r r r r r r r
�__init__& s zSimpleKey.__init__N)r r r r r r r r
r # s r c " @ s� e Z d Z d d � Z d d � Z d d � Z d d � Z d d
� Z d d � Z d
d � Z d d � Z
d d � Z d d � Z d d � Z
d d � Z d d � Z d d � Z d d � Z d d � Z d! d" � Z d# d$ � Z d% d& � Z d' d( � Z d) d* � Z d+ d, � Z d- d. � Z d/ d0 � Z d1 d2 � Z d3 d4 � Z d5 d6 � Z d7 d8 � Z d9 d: � Z d; d< � Z d= d> � Z! d? d@ � Z" dA dB � Z# dC dD � Z$ dE dF � Z% dG dH � Z& dI dJ � Z' dK dL � Z( dM dN � Z) dO dP � Z* dQ dR � Z+ dS dT � Z, dU dV � Z- dW dX � Z. dY dZ � Z/ d[ d\ � Z0 d] d^ � Z1 d_ d` � Z2 da db � Z3 dc dd � Z4 de df � Z5 dg dh � Z6 di dj � Z7 dk dl � Z8 dm dn � Z9 do dp � Z: dq dr � Z; ds dt � Z< du dv � Z= dw dx � Z> dy dz � Z? d{ d| � Z@ d} d~ d d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� d� i ZA d� d� d� d� d� d� i ZB d� d� � ZC d� d� � ZD d� d� � ZE d� d� � ZF d� d� � ZG d� d� � ZH d� d� � ZI d� d� � ZJ d� d� � ZK d� S)�r c C sV d | _ d | _ g | _ | j � d | _ d | _ g | _ d | _ i | _ d S)zInitialize the scanner.F� r TN���) �done�
flow_level�tokens�fetch_stream_start� tokens_taken�indent�indents�allow_simple_key�possible_simple_keys)r r r r
r 0 s
zScanner.__init__c G s_ x | j � r | j � q W| j r[ | s0 d Sx( | D] } t | j d | � r7 d Sq7 Wd S)NTr F)�need_more_tokens�fetch_more_tokensr �
isinstance)r �choices�choicer r r
� check_tokenq s
zScanner.check_tokenc C s5 x | j � r | j � q W| j r1 | j d Sd S)Nr )r r r )r r r r
�
peek_token} s zScanner.peek_tokenc C sI x | j � r | j � q W| j rE | j d 7_ | j j d � Sd S)Nr r )r r r r �pop)r r r r
� get_token� s
zScanner.get_tokenc C sA | j r
d S| j s d S| j � | j � | j k r= d Sd S)NFT)r r �stale_possible_simple_keys�next_possible_simple_keyr )r r r r
r � s
zScanner.need_more_tokensc C sg | j � | j � | j | j � | j � } | d k rF | j � S| d k rh | j � rh | j � S| d k r� | j � r� | j � S| d k r� | j
� r� | j � S| d k r� | j � S| d k r� | j
� S| d k r� | j � S| d k r| j � S| d k r| j � S| d k r<| j � r<| j � S| d
k r^| j � r^| j � S| d k r�| j � r�| j � S| d k r�| j � S| d
k r�| j � S| d k r�| j � S| d k r�| j r�| j � S| d k r| j r| j � S| d k r| j � S| d k r.| j � S| j � rD| j � St! d d d | | j" � � � d S)N� �%�-�.�[�{�]�}�,�?�:r �&�!�|�>�'�"z!while scanning for the next tokenz.found character %r that cannot start any token)#�scan_to_next_tokenr( �
unwind_indentr �peek�fetch_stream_end�check_directive�fetch_directive�check_document_start�fetch_document_start�check_document_end�fetch_document_end�fetch_flow_sequence_start�fetch_flow_mapping_start�fetch_flow_sequence_end�fetch_flow_mapping_end�fetch_flow_entry�check_block_entry�fetch_block_entry� check_key� fetch_key� check_value� fetch_value� fetch_alias� fetch_anchor� fetch_tagr �
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r � s^
zScanner.fetch_more_tokensc C sO d } xB | j D]7 } | j | } | d k s> | j | k r | j } q W| S)N)r r )r Zmin_token_number�level�keyr r r
r) s
z Scanner.next_possible_simple_keyc C s� x} t | j � D]l } | j | } | j | j k sK | j | j d k r | j rr t d | j d | j � � � | j | =q Wd S)Ni zwhile scanning a simple keyzcould not find expected ':')�listr r r r
r r rY )r r[ r\ r r r
r( s
z"Scanner.stale_possible_simple_keysc C s� | j o | j | j k } | j r | j � | j t | j � } t | | | j | j
| j | j � � } | | j | j <d S)N)
r r r r �remove_possible_simple_keyr �lenr r r r rY r )r r
r r\ r r r
�save_possible_simple_key$ s
!z Scanner.save_possible_simple_keyc C sZ | j | j k rV | j | j } | j rI t d | j d | j � � � | j | j =d S)Nzwhile scanning a simple keyzcould not find expected ':')r r r
r r rY )r r\ r r r
r^ 5 s z"Scanner.remove_possible_simple_keyc C s^ | j r
d SxJ | j | k rY | j � } | j j � | _ | j j t | | � � q Wd S)N)r r rY r r& r �appendZ
BlockEndToken)r r r r r r
r< B s zScanner.unwind_indentc C s3 | j | k r/ | j j | j � | | _ d Sd S)NTF)r r ra )r r r r r
�
add_indentZ s
zScanner.add_indentc C s2 | j � } | j j t | | d | j �� d S)N�encoding)rY r ra ZStreamStartTokenrc )r r r r r
r d s zScanner.fetch_stream_startc C s[ | j d � | j � d | _ i | _ | j � } | j j t | | � � d | _ d S)Nr FTr ) r< r^ r r rY r ra ZStreamEndTokenr )r r r r r
r> p s
zScanner.fetch_stream_endc C s: | j d � | j � d | _ | j j | j � � d S)Nr Fr )r< r^ r r ra �scan_directive)r r r r
r@ � s
zScanner.fetch_directivec C s | j t � d S)N)�fetch_document_indicatorZDocumentStartToken)r r r r
rB � s z Scanner.fetch_document_startc C s | j t � d S)N)re ZDocumentEndToken)r r r r
rD � s zScanner.fetch_document_endc C sb | j d � | j � d | _ | j � } | j d � | j � } | j j | | | � � d S)Nr F� r )r< r^ r rY �forwardr ra )r �
TokenClass�
start_mark�end_markr r r
re � s
z Scanner.fetch_document_indicatorc C s | j t � d S)N)�fetch_flow_collection_startZFlowSequenceStartToken)r r r r
rE � s z!Scanner.fetch_flow_sequence_startc C s | j t � d S)N)rk ZFlowMappingStartToken)r r r r
rF � s z Scanner.fetch_flow_mapping_startc C sa | j � | j d 7_ d | _ | j � } | j � | j � } | j j | | | � � d S)Nr T)r` r r rY rg r ra )r rh ri rj r r r
rk � s
z#Scanner.fetch_flow_collection_startc C s | j t � d S)N)�fetch_flow_collection_endZFlowSequenceEndToken)r r r r
rG � s z Scanner.fetch_flow_sequence_endc C s | j t � d S)N)rl ZFlowMappingEndToken)r r r r
rH � s z Scanner.fetch_flow_mapping_endc C sa | j � | j d 8_ d | _ | j � } | j � | j � } | j j | | | � � d S)Nr F)r^ r r rY rg r ra )r rh ri rj r r r
rl � s
z!Scanner.fetch_flow_collection_endc C sR d | _ | j � | j � } | j � | j � } | j j t | | � � d S)NT)r r^ rY rg r ra ZFlowEntryToken)r ri rj r r r
rI � s
zScanner.fetch_flow_entryc C s� | j sg | j s- t d d d | j � � � | j | j � rg | j � } | j j t | | � � n d | _ | j � | j � } | j
� | j � } | j j t | | � � d S)Nz%sequence entries are not allowed hereT) r r r rY rb r r ra ZBlockSequenceStartTokenr^ rg ZBlockEntryToken)r r ri rj r r r
rK � s
zScanner.fetch_block_entryc C s� | j sd | j s- t d d d | j � � � | j | j � rd | j � } | j j t | | � � | j | _ | j � | j � } | j
� | j � } | j j t | | � � d S)Nz!mapping keys are not allowed here) r r r rY rb r r ra �BlockMappingStartTokenr^ rg �KeyToken)r r ri rj r r r
rM s
zScanner.fetch_keyc C sq | j | j k r� | j | j } | j | j =| j j | j | j t | j | j � � | j s� | j | j � r� | j j | j | j t
| j | j � � d | _ n� | j s� | j s� t d d d | j
� � � | j s| j | j � r| j
� } | j j t
| | � � | j | _ | j � | j
� } | j � | j
� } | j j t | | � � d S)NFz#mapping values are not allowed here)r r r �insertr r rn r rb r rm r r rY ra r^ rg Z
ValueToken)r r\ r ri rj r r r
rO s2
zScanner.fetch_valuec C s0 | j � d | _ | j j | j t � � d S)NF)r` r r ra � scan_anchorZ
AliasToken)r r r r
rP V s
zScanner.fetch_aliasc C s0 | j � d | _ | j j | j t � � d S)NF)r` r r ra rp Z AnchorToken)r r r r
rQ a s
zScanner.fetch_anchorc C s- | j � d | _ | j j | j � � d S)NF)r` r r ra �scan_tag)r r r r
rR l s
zScanner.fetch_tagc C s | j d d � d S)N�styler7 )�fetch_block_scalar)r r r r
rS w s zScanner.fetch_literalc C s | j d d � d S)Nrr r8 )rs )r r r r
rT z s zScanner.fetch_foldedc C s0 d | _ | j � | j j | j | � � d S)NT)r r^ r ra �scan_block_scalar)r rr r r r
rs } s
zScanner.fetch_block_scalarc C s | j d d � d S)Nrr r9 )�fetch_flow_scalar)r r r r
rU � s zScanner.fetch_singlec C s | j d d � d S)Nrr r: )ru )r r r r
rV � s zScanner.fetch_doublec C s0 | j � d | _ | j j | j | � � d S)NF)r` r r ra �scan_flow_scalar)r rr r r r
ru � s
zScanner.fetch_flow_scalarc C s- | j � d | _ | j j | j � � d S)NF)r` r r ra �
scan_plain)r r r r
rX � s
zScanner.fetch_plainc C s | j d k r d Sd S)Nr T)r )r r r r
r? � s zScanner.check_directivec C sA | j d k r= | j d � d k r= | j d � d k r= d Sd S)Nr rf z---u
T)r �prefixr= )r r r r
rA � s z Scanner.check_document_startc C sA | j d k r= | j d � d k r= | j d � d k r= d Sd S)Nr rf z...u
T)r rx r= )r r r r
rC � s zScanner.check_document_endc C s | j d � d k S)Nr u
)r= )r r r r
rJ � s zScanner.check_block_entryc C s$ | j r
d S| j d � d k Sd S)NTr u
)r r= )r r r r
rL � s zScanner.check_keyc C s$ | j r
d S| j d � d k Sd S)NTr u
)r r= )r r r r
rN � s zScanner.check_valuec C sM | j � } | d k pL | j d � d k oL | d k pL | j oL | d k S)Nu
-?:,[]{}#&*!|>'"%@`r u
r, z?:)r= r )r rZ r r r
rW � s zScanner.check_plainc C s� | j d k r+ | j � d k r+ | j � d } x� | s� x | j � d k r\ | j � q= W| j � d k r� x | j � d k r� | j � qr W| j � r� | j s� d | _ q4 d } q4 Wd S)Nr u F� �#u
T)r r= rg �scan_line_breakr r )r �foundr r r
r; � s !
zScanner.scan_to_next_tokenc C s� | j � } | j � | j | � } d } | d k rU | j | � } | j � } nY | d k r | j | � } | j � } n/ | j � } x | j � d k r� | j � q� W| j | � t | | | | � S)NZYAMLZTAGu
)rY rg �scan_directive_name�scan_yaml_directive_value�scan_tag_directive_valuer= �scan_directive_ignored_lineZDirectiveToken)r ri �name�valuerj r r r
rd s
zScanner.scan_directivec C s d } | j | � } x} d | k o/ d k n sx d | k oK d k n sx d | k og d k n sx | d k r� | d 7} | j | � } q W| s� t d
| d | | j � � � | j | � } | j | � | j � } | d k r
t d
| d | | j � � � | S)
Nr �0�9�A�Z�a�zz-_r zwhile scanning a directivez6expected alphabetic or numeric character, but found %ru
)r= r rY rx rg )r ri �lengthrZ r� r r r
r} # s$ W
zScanner.scan_directive_namec C s� x | j � d k r" | j � q W| j | � } | j � d k ri t d | d | j � | j � � � | j � | j | � } | j � d k r� t d | d | j � | j � � � | | f S)Nry r- zwhile scanning a directivez%expected a digit or '.', but found %ru
z%expected a digit or ' ', but found %r)r= rg �scan_yaml_directive_numberr rY )r ri �major�minorr r r
r~ 8 s
z!Scanner.scan_yaml_directive_valuec C s� | j � } d | k o# d k n sG t d | d | | j � � � d } x3 d | j | � k op d k n r� | d 7} qP Wt | j | � � } | j | � | S)Nr� r� zwhile scanning a directivez expected a digit, but found %rr r )r= r rY �intrx rg )r ri rZ r� r� r r r
r� I s (
z"Scanner.scan_yaml_directive_numberc C sn x | j � d k r" | j � q W| j | � } x | j � d k rT | j � q5 W| j | � } | | f S)Nry )r= rg �scan_tag_directive_handle�scan_tag_directive_prefix)r ri �handlerx r r r
r V s z Scanner.scan_tag_directive_valuec C sM | j d | � } | j � } | d k rI t d | d | | j � � � | S)N� directivery zwhile scanning a directivezexpected ' ', but found %r)�scan_tag_handler= r rY )r ri r� rZ r r r
r� ` s z!Scanner.scan_tag_directive_handlec C sM | j d | � } | j � } | d k rI t d | d | | j � � � | S)Nr� u
zwhile scanning a directivezexpected ' ', but found %r)� scan_tag_urir= r rY )r ri r� rZ r r r
r� i s z!Scanner.scan_tag_directive_prefixc C s� x | j � d k r" | j � q W| j � d k rX x | j � d k rW | j � q8 W| j � } | d k r� t d | d | | j � � � | j � d S)Nry rz u
zwhile scanning a directivez0expected a comment or a line break, but found %r)r= rg r rY r{ )r ri rZ r r r
r� r s z#Scanner.scan_directive_ignored_linec C sn | j � } | j � } | d k r- d } n d } | j � d } | j | � } x} d | k ol d k n s� d | k o� d k n s� d | k o� d
k n s� | d k r� | d 7} | j | � } qU W| s� t d
| | d | | j � � � | j | � } | j | � | j � } | d k rRt d
| | d | | j � � � | j � } | | | | � S)Nr �aliasZanchorr r� r� r� r� r� r� z-_r zwhile scanning an %sz6expected alphabetic or numeric character, but found %ru
?:,]}%@`)rY r= rg r rx ) r rh ri Z indicatorr� r� rZ r� rj r r r
rp � s2
W
zScanner.scan_anchorc C s� | j � } | j d � } | d k r� d } | j d � | j d | � } | j � d k r� t d | d | j � | j � � � | j � n� | d k r� d } d } | j � n� d } d
} x< | d k r� | d k r� d } P| d 7} | j | � } q� Wd } | r!| j d | � } n d } | j � | j d | � } | j � } | d k rzt d
| d | | j � � � | | f } | j � } t | | | � S)Nr �<� �tagr8 zwhile parsing a tagzexpected '>', but found %ru
r6 Fu
Tzwhile scanning a tagzexpected ' ', but found %r)rY r= rg r� r r� ZTagToken) r ri rZ r� �suffixr� Z
use_handler� rj r r r
rq � sH
zScanner.scan_tagc C sN | d k r d } n d } g } | j � } | j � | j | � \ } } | j | � | j d } | d k rx d } | d k r� | j � \ } } }
t | | � } n# | | d } | j | � \ } }
d } x&| j | k r�| j � d k r�| j
| � | j � d k }
d } x# | j | � d k rB| d 7} q W| j | j | � � | j | � | j
� } | j | � \ } }
| j | k r�| j � d k r�| r�| d
k r�|
r�| j � d k r�| s�| j d � q�| j | � q� Pq� W| d k r| j | � | d k r/| j
| � t d j | � d | |
| � S) Nr8 TFr � r* z r u
�
ry )rY rg � scan_block_scalar_indicators� scan_block_scalar_ignored_liner � scan_block_scalar_indentation�max�scan_block_scalar_breaksr r= �extendra rx r{ � ScalarToken�join)r rr Zfolded�chunksri �chomping� incrementZ
min_indent�breaks�
max_indentrj r �
line_breakZleading_non_spacer� r r r
rt � sP
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zScanner.scan_block_scalarc C sh d } d } | j � } | d k r� | d k r9 d } n d } | j � | j � } | d k r't | � } | d k r� t d | d | j � � � | j � n� | d k r't | � } | d k r� t d | d | j � � � | j � | j � } | d k r'| d k rd } n d } | j � | j � } | d k r^t d | d
| | j � � � | | f S) Nz+-�+TF�
0123456789r z while scanning a block scalarz<expected indentation indicator in the range 1-9, but found 0u
z9expected chomping or indentation indicators, but found %r)r= rg r� r rY )r ri r� r� rZ r r r
r� sF
z$Scanner.scan_block_scalar_indicatorsc C s� x | j � d k r" | j � q W| j � d k rX x | j � d k rW | j � q8 W| j � } | d k r� t d | d | | j � � � | j � d S)Nry rz u
z while scanning a block scalarz0expected a comment or a line break, but found %r)r= rg r rY r{ )r ri rZ r r r
r� A s z&Scanner.scan_block_scalar_ignored_linec C s� g } d } | j � } xl | j � d k r� | j � d k ra | j | j � � | j � } q | j � | j | k r | j } q W| | | f S)Nr u
ry )rY r= ra r{ rg r )r r� r� rj r r r
r� O s
z%Scanner.scan_block_scalar_indentationc C s� g } | j � } x/ | j | k rC | j � d k rC | j � q Wxg | j � d k r� | j | j � � | j � } x/ | j | k r� | j � d k r� | j � q{ WqG W| | f S)Nry u
)rY r r= rg ra r{ )r r r� rj r r r
r� ^ s $ $z Scanner.scan_block_scalar_breaksc C s� | d k r d } n d } g } | j � } | j � } | j � | j | j | | � � xH | j � | k r� | j | j | | � � | j | j | | � � q_ W| j � | j � } t d j | � d | | | � S)Nr: TFr� )rY r= rg r� �scan_flow_scalar_non_spaces�scan_flow_scalar_spacesr� r� )r rr �doubler� ri �quoterj r r r
rv k s
zScanner.scan_flow_scalarr� r* r� ��b��t� �nr� �v� �f� �r�
�e�ry r: �\�N�
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�xr� �u� �U� c C sa g } xTd } x# | j | � d k r4 | d 7} q W| r^ | j | j | � � | j | � | j � } | r� | d k r� | j d � d k r� | j d � | j d � q | r� | d k s� | r� | d k r� | j | � | j � q | rU| d k rU| j � | j � } | | j k rF| j | j | � | j � qY| | j k r| j | } | j � xW t | � D]I } | j | � d k ryt d | d
| | j | � f | j � � � qyWt | j | � d � } | j t
| � � | j | � qY| d k r3| j � | j | j
| | � � qYt d | d
| | j � � � q | Sq Wd S)Nr u '"\
r r9 r� z"\r� �0123456789ABCDEFabcdefz%while scanning a double-quoted scalarz?expected escape sequence of %d hexdecimal numbers, but found %r� u
z!found unknown escape character %r)r= ra rx rg �ESCAPE_REPLACEMENTS� ESCAPE_CODES�ranger rY r� �chrr{ r� �scan_flow_scalar_breaks)r r� ri r� r� rZ �k�coder r r
r� � sL
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z#Scanner.scan_flow_scalar_non_spacesc C s� g } d } x# | j | � d k r1 | d 7} q W| j | � } | j | � | j � } | d k r� t d | d | j � � � nv | d k r� | j � } | j | | � } | d k r� | j | � n | s� | j d � | j | � n
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Nr z r r* z while scanning a quoted scalarz found unexpected end of streamu
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zScanner.scan_tag_uric C s g } | j � } x� | j � d k r� | j � xU t d � D]G } | j | � d k r> t d | | d | j | � | j � � � q> W| j t | j d � d � � | j d � q Wy t | � j d � } WnD t
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