U
    +5øi  ã                   @  s@  U d dl mZ d dlZd dlZd dlmZ d dlmZmZm	Z	 ddl
mZ eG dd„ dƒƒZG d	d
„ d
eƒZe d¡e d¡e d¡e d¡e d¡e d¡e dej¡e d¡e d¡e d¡e d¡e dej¡e ejejejB ¡e d¡e d¡e d¡e d¡e d¡e d¡e d¡dœZded < G d!d"„ d"ƒZdS )#é    )ÚannotationsN)Ú	dataclass)Ú	GeneratorÚMappingÚNoReturné   )Ú	Specifierc                   @  s&   e Zd ZU ded< ded< ded< dS )ÚTokenÚstrÚnameÚtextÚintÚpositionN)Ú__name__Ú
__module__Ú__qualname__Ú__annotations__© r   r   ú8/tmp/pip-unpacked-wheel-xj899fla/packaging/_tokenizer.pyr	      s   
r	   c                      s:   e Zd ZdZdddddœ‡ fdd„Zddœd	d
„Z‡  ZS )ÚParserSyntaxErrorz7The provided source text could not be parsed correctly.r
   ztuple[int, int]ÚNone)ÚmessageÚsourceÚspanÚreturnc                  s    || _ || _|| _tƒ  ¡  d S )N)r   r   r   ÚsuperÚ__init__)Úselfr   r   r   ©Ú	__class__r   r   r      s    zParserSyntaxError.__init__©r   c                 C  sB   d| j d  d| j d | j d    d }| j› d| j› d|› �S )Nú r   ú~r   ú^z
    )r   r   r   )r   Úmarkerr   r   r   Ú__str__"   s    *zParserSyntaxError.__str__)r   r   r   Ú__doc__r   r%   Ú__classcell__r   r   r   r   r      s   r   z\(z\)z\[z\]ú;ú,zk
            (
                ('[^']*')
                |
                ("[^"]*")
            )
        z(===|==|~=|!=|<=|>=|<|>)z\b(or|and)\bz\bin\bz\bnot\ba¬  
            \b(
                python_version
                |python_full_version
                |os[._]name
                |sys[._]platform
                |platform_(release|system)
                |platform[._](version|machine|python_implementation)
                |python_implementation
                |implementation_(name|version)
                |extras?
                |dependency_groups
            )\b
        z\@z[^ \t]+z\b[a-zA-Z0-9][a-zA-Z0-9._-]*\bz\.\*z\+[a-z0-9]+(?:[-_\.][a-z0-9]+)*z[ \t]+ú$)ZLEFT_PARENTHESISZRIGHT_PARENTHESISZLEFT_BRACKETZRIGHT_BRACKETÚ	SEMICOLONÚCOMMAZQUOTED_STRINGÚOPÚBOOLOPÚINZNOTÚVARIABLEZ	SPECIFIERÚATÚURLÚ
IDENTIFIERZVERSION_PREFIX_TRAILZVERSION_LOCAL_LABEL_TRAILZWSZENDzdict[str, re.Pattern[str]]ÚDEFAULT_RULESc                   @  s    e Zd ZdZddddœdd„Zdddœd	d
„Zddœddddœdd„Zddddœdd„Zddœdd„Zdddœdddddœdd„Z	e
jddddd œd!d"„ƒZdS )#Ú	Tokenizerz„Context-sensitive token parsing.

    Provides methods to examine the input stream to check whether the next token
    matches.
    r
   zMapping[str, re.Pattern[str]]r   )r   Úrulesr   c                C  s   || _ || _d | _d| _d S )Nr   )r   r6   Ú
next_tokenr   )r   r   r6   r   r   r   r   b   s    zTokenizer.__init__)r   r   c                 C  s   |   |¡r|  ¡  dS )z8Move beyond provided token name, if at current position.N)ÚcheckÚread)r   r   r   r   r   Úconsumem   s    
zTokenizer.consumeF)ÚpeekÚbool)r   r;   r   c                C  sz   | j dks td|›d| j ›�ƒ‚|| jks8td|›�ƒ‚| j| }| | j| j¡}|dkr^dS |svt||d | jƒ| _ dS )zÿCheck whether the next token has the provided name.

        By default, if the check succeeds, the token *must* be read before
        another check. If `peek` is set to `True`, the token is not loaded and
        would need to be checked again.
        NzCannot check for z, already have zUnknown token name: Fr   T)r7   ÚAssertionErrorr6   Úmatchr   r   r	   )r   r   r;   Z
expressionr>   r   r   r   r8   r   s    ÿ
zTokenizer.checkr	   )r   Úexpectedr   c                C  s"   |   |¡s|  d|› �¡‚|  ¡ S )zsExpect a certain token name next, failing with a syntax error otherwise.

        The token is *not* read.
        z	Expected )r8   Úraise_syntax_errorr9   )r   r   r?   r   r   r   Úexpect‡   s    
zTokenizer.expectr    c                 C  s0   | j }|dk	st‚|  jt|jƒ7  _d| _ |S )z%Consume the next token and return it.N)r7   r=   r   Úlenr   )r   Útokenr   r   r   r9   �   s
    zTokenizer.readN)Ú
span_startÚspan_endz
int | Noner   )r   rD   rE   r   c                C  s8   |dkr| j n||dkr| j n|f}t|| j|d�‚dS )z.Raise ParserSyntaxError at the given position.N)r   r   )r   r   r   )r   r   rD   rE   r   r   r   r   r@   š   s    	þýzTokenizer.raise_syntax_errorzGenerator[(None, None, None)])Ú
open_tokenÚclose_tokenÚaroundr   c                c  sf   |   |¡r| j}|  ¡  nd }d V  |d kr0d S |   |¡sZ| jd|› d|› d|› �|d� |  ¡  d S )NzExpected matching z for z, after )rD   )r8   r   r9   r@   )r   rF   rG   rH   Zopen_positionr   r   r   Úenclosing_tokens¬   s    


þzTokenizer.enclosing_tokens)r   r   r   r&   r   r:   r8   rA   r9   r@   Ú
contextlibÚcontextmanagerrI   r   r   r   r   r5   [   s   	ûr5   )Ú
__future__r   rJ   ÚreZdataclassesr   Útypingr   r   r   Ú
specifiersr   r	   Ú	Exceptionr   ÚcompileÚVERBOSEZ_specifier_regex_strÚ
IGNORECASEr4   r   r5   r   r   r   r   Ú<module>   sP    ø
ñ
þÐ4