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Z LEFT_BRACKETT)r9 Z RIGHT_BRACKETr# )�aroundr- N)r< �enclosing_tokensr1 �_parse_extras_list)r, r# r r r r4 � s r4 c C s� g }| � d�s|S |�| �� j� x`| �d� | j ddd�rH| �d� n | � d�sTP | �� | �d� | jddd�}|�|j� q$W |S ) z> extras_list = identifier (wsp* ',' wsp* identifier)* r. r- T)r9 z"Expected comma between extra names�COMMAzextra name after comma)r/ )r< �appendr= r3 r1 rC r2 )r, r# Z extra_tokenr r r rG � s rG c C s< | j dddd��" | �d� t| �}| �d� W dQ R X |S )zr specifier = LEFT_PARENTHESIS WS? version_many WS? RIGHT_PARENTHESIS | WS? version_many WS? �LEFT_PARENTHESIS�RIGHT_PARENTHESISzversion specifier)rE r- N)rF r1 �_parse_version_many)r, �parsed_specifiersr r r r@ � s r@ c C s� d}x�| � d�r�| j}|| �� j7 }| j ddd�rH| jd|| jd d� | j d dd�rh| jd || jd� | �d � | � d �s~P || �� j7 }| �d � qW |S ) z@ version_many = (SPECIFIER (WS? COMMA WS? SPECIFIER)*)? r6 Z SPECIFIERZVERSION_PREFIX_TRAILT)r9 z6.* suffix can only be used with `==` or `!=` operatorsr )r: Zspan_endZVERSION_LOCAL_LABEL_TRAILz@Local version label can only be used with `==` or `!=` operatorsr- rH )r< r> r= r3 rC r1 )r, rM r: r r r rL � s( rL c C s t t| td��S )N)r) )rD r r )r( r r r � parse_marker� s rN c C s> t | �g}x.| �d�r8| �� }t | �}|�|j|f� q W |S )z4 marker = marker_atom (BOOLOP marker_atom)+ �BOOLOP)�_parse_marker_atomr< r= �extendr3 )r, Z expression�tokenZ expr_rightr r r rD s rD c C sh | � d� | jddd�rR| jdddd��" | � d� t| �}| � d� W dQ R X nt| �}| � d� |S ) zw marker_atom = WS? LEFT_PARENTHESIS WS? marker WS? RIGHT_PARENTHESIS WS? | WS? marker_item WS? r- rJ T)r9 rK zmarker expression)rE N)r1 r< rF rD �_parse_marker_item)r, r% r r r rP s rP c C sJ | � d� t| �}| � d� t| �}| � d� t| �}| � d� |||fS )zG marker_item = WS? marker_var WS? marker_op WS? marker_var WS? r- )r1 �_parse_marker_var�_parse_marker_op)r, Zmarker_var_leftZ marker_opZmarker_var_rightr r r rS $ s rS c C sH | � d�r t| �� j�dd��S | � d�r8t| �� j�S | jdd� dS )z/ marker_var = VARIABLE | QUOTED_STRING �VARIABLE�.�_Z QUOTED_STRINGz+Expected a marker variable or quoted string)�messageN)r< �process_env_varr= r3 �replace�process_python_strrC )r, r r r rT 2 s rT )�env_varr c C s$ | dks| dkrt d�S t | �S d S )N� platform_python_implementation�python_implementation)r )r] r r r rZ @ s rZ )� python_strr c C s t �| �}tt|��S )N)�ast� literal_evalr r )r` r r r r r\ J s r\ c C sv | � d�r| �� td�S | � d�rP| �� | jddd� | jddd� td�S | � d �rht| �� j�S | �d �S d S ) z& marker_op = IN | NOT IN | OP �IN�inZNOTr- zwhitespace after 'not')r/ z'in' after 'not'znot in�OPzJExpected marker operator, one of <=, <, !=, ==, >=, >, ~=, ===, in, not inN)r< r= r r2 r3 rC )r, r r r rU O s rU )'�__doc__ra �typingr r r r r r � _tokenizerr r r r r r Z MarkerVarZ MarkerItemZ MarkerAtomr' r r r+ r* r5 �intr? r4 rG r@ rL rN rD rP rS rT rZ r\ rU r r r r �<module> s< 2
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