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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 �
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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
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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
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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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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 keyz could not found expected ':')�listr r r r
r r rX )r rZ 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 rX 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 keyz could not found expected ':')r r r
r r rX )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 rX 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 r` )r r r r r
�
add_indentZ s
zScanner.add_indentc C s2 | j � } | j j t | | d | j �� d S)N�encoding)rX r r` ZStreamStartTokenrb )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 rX r r` 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 r` �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
rA � s z Scanner.fetch_document_startc C s | j t � d S)N)rd ZDocumentEndToken)r r r r
rC � 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 rX �forwardr r` )r �
TokenClass�
start_mark�end_markr r r
rd � s
z Scanner.fetch_document_indicatorc C s | j t � d S)N)�fetch_flow_collection_startZFlowSequenceStartToken)r r r r
rD � s z!Scanner.fetch_flow_sequence_startc C s | j t � d S)N)rj ZFlowMappingStartToken)r r r r
rE � 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 rX rf r r` )r rg rh ri r r r
rj � s
z#Scanner.fetch_flow_collection_startc C s | j t � d S)N)�fetch_flow_collection_endZFlowSequenceEndToken)r r r r
rF � s z Scanner.fetch_flow_sequence_endc C s | j t � d S)N)rk ZFlowMappingEndToken)r r r r
rG � 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 rX rf r r` )r rg rh ri r r r
rk � s
z!Scanner.fetch_flow_collection_endc C sR d | _ | j � | j � } | j � | j � } | j j t | | � � d S)NT)r r] rX rf r r` ZFlowEntryToken)r rh ri r r r
rH � 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 rX ra r r r` ZBlockSequenceStartTokenr] rf ZBlockEntryToken)r r rh ri r r r
rJ � 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 rX ra r r r` �BlockMappingStartTokenr] rf �KeyToken)r r rh ri r r r
rL 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 rm r ra r rl r r rX r` r] rf Z
ValueToken)r r[ r rh ri r r r
rN s2
zScanner.fetch_valuec C s0 | j � d | _ | j j | j t � � d S)NF)r_ r r r` � scan_anchorZ
AliasToken)r r r r
rO V s
zScanner.fetch_aliasc C s0 | j � d | _ | j j | j t � � d S)NF)r_ r r r` ro Z AnchorToken)r r r r
rP a s
zScanner.fetch_anchorc C s- | j � d | _ | j j | j � � d S)NF)r_ r r r` �scan_tag)r r r r
rQ l s
zScanner.fetch_tagc C s | j d d � d S)N�styler6 )�fetch_block_scalar)r r r r
rR w s zScanner.fetch_literalc C s | j d d � d S)Nrq r7 )rr )r r r r
rS z s zScanner.fetch_foldedc C s0 d | _ | j � | j j | j | � � d S)NT)r r] r r` �scan_block_scalar)r rq r r r
rr } s
zScanner.fetch_block_scalarc C s | j d d � d S)Nrq r8 )�fetch_flow_scalar)r r r r
rT � s zScanner.fetch_singlec C s | j d d � d S)Nrq r9 )rt )r r r r
rU � s zScanner.fetch_doublec C s0 | j � d | _ | j j | j | � � d S)NF)r_ r r r` �scan_flow_scalar)r rq r r r
rt � s
zScanner.fetch_flow_scalarc C s- | j � d | _ | j j | j � � d S)NF)r_ r r r` �
scan_plain)r r r r
rW � 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 re z---u
T)r �prefixr< )r r r r
r@ � 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 re z...u
T)r rw r< )r r r r
rB � s zScanner.check_document_endc C s | j d � d k S)Nr u
)r< )r r r r
rI � 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
rK � s zScanner.check_keyc C s$ | j r
d S| j d � d k Sd S)NTr u
)r r< )r r r r
rM � 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 rY r r r
rV � 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< rf �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
)rX rf �scan_directive_name�scan_yaml_directive_value�scan_tag_directive_valuer< �scan_directive_ignored_lineZDirectiveToken)r rh �name�valueri r r r
rc 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 rX rw rf )r rh �lengthrY 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)Nrx r, zwhile scanning a directivez%expected a digit or '.', but found %ru
z%expected a digit or ' ', but found %r)r< rf �scan_yaml_directive_numberr rX )r rh �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 rX �intrw rf )r rh rY 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)Nrx )r< rf �scan_tag_directive_handle�scan_tag_directive_prefix)r rh �handlerw 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� directiverx zwhile scanning a directivezexpected ' ', but found %r)�scan_tag_handler< r rX )r rh r� rY 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 rX )r rh r� rY 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)Nrx ry u
zwhile scanning a directivez0expected a comment or a line break, but found %r)r< rf r rX rz )r rh rY 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
?:,]}%@`)rX r< rf r rw ) r rg rh Z indicatorr� r� rY r� ri r r r
ro � 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 �<� �tagr7 zwhile parsing a tagzexpected '>', but found %ru
r5 Fu
Tzwhile scanning a tagzexpected ' ', but found %r)rX r< rf r� r r� ZTagToken) r rh rY r� �suffixr� Z
use_handler� ri r r r
rp � 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) Nr7 TFr � r) z r u
�
rx )rX rf � scan_block_scalar_indicators� scan_block_scalar_ignored_liner � scan_block_scalar_indentation�max�scan_block_scalar_breaksr r< �extendr` rw rz � ScalarToken�join)r rq Zfolded�chunksrh �chomping� incrementZ
min_indent�breaks�
max_indentri r �
line_breakZleading_non_spacer� r r r
rs � 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< rf r� r rX )r rh r� r� rY 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)Nrx ry u
z while scanning a block scalarz0expected a comment or a line break, but found %r)r< rf r rX rz )r rh rY 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
rx )rX r< r` rz rf r )r r� r� ri 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)Nrx u
)rX r r< rf r` rz )r r r� ri 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)Nr9 TFr� )rX r< rf r� �scan_flow_scalar_non_spaces�scan_flow_scalar_spacesr� r� )r rq �doubler� rh Zquoteri r r r
ru k s
zScanner.scan_flow_scalarr� r) r� ��b��t� �nr� �v� �f� �r�
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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
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r r8 r� z"\r� �0123456789ABCDEFabcdefz%while scanning a double-quoted scalarz?expected escape sequence of %d hexdecimal numbers, but found %r� u
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