a
    $Rh                     @   s   d Z dZddlZddlmZmZmZmZmZm	Z	 ddl
mZ ddl
mZ G dd	 d	eZd
d ZG dd deZejejejddZdd Zdd Zdd ZdS )zPattern compiler.

The grammar is taken from PatternGrammar.txt.

The compiler compiles a pattern to a pytree.*Pattern instance.
z#Guido van Rossum <guido@python.org>    N   )driverliteralstokentokenizeparsegrammar)pytree)pygramc                   @   s   e Zd ZdS )PatternSyntaxErrorN)__name__
__module____qualname__ r   r   7/opt/python-3.9.24/usr/lib/python3.9/lib2to3/patcomp.pyr      s   r   c           	      c   sL   t jt jt jh}tt| j}|D ] }|\}}}}}||vr&|V  q&dS )z6Tokenizes a string suppressing significant whitespace.N)	r   NEWLINEINDENTDEDENTr   generate_tokensioStringIOreadline)	inputskiptokensZ	quintupletypevaluestartendZ	line_textr   r   r   tokenize_wrapper   s    r   c                   @   s:   e Zd ZdddZdddZdd Zdd	d
Zdd ZdS )PatternCompilerNc                 C   sZ   |du rt j| _t j| _nt|| _t | j| _t j| _	t j
| _tj| jtd| _dS )z^Initializer.

        Takes an optional alternative filename for the pattern grammar.
        N)convert)r
   Zpattern_grammarr   Zpattern_symbolssymsr   Zload_grammarZSymbolsZpython_grammarZ	pygrammarZpython_symbolspysymsZDriverpattern_convert)selfZgrammar_filer   r   r   __init__(   s    
zPatternCompiler.__init__Fc              
   C   sr   t |}z| jj||d}W n4 tjyP } ztt|dW Y d}~n
d}~0 0 |rd| ||fS | |S dS )z=Compiles a pattern string to a nested pytree.*Pattern object.)debugN)r   r   Zparse_tokensr   Z
ParseErrorr   strcompile_node)r%   r   r'   Z	with_treer   rooter   r   r   compile_pattern7   s    $zPatternCompiler.compile_patternc                    sV  |j  jjkr|jd }|j  jjkrz fdd|jddd D }t|dkrX|d S tjdd |D ddd}| S |j  jj	krʇ fd	d|jD }t|dkr|d S tj|gddd}| S |j  jj
kr |jdd }t|}| S d}|j}t|d
kr>|d j tjkr>|d j}|dd }d}t|dkrx|d j  jjkrx|d }|dd } ||}|dur>|j}	|	d }
|
j tjkrd}tj}nX|
j tjkrd}tj}n>|
j tjkr |	d  }}t|	dkr |	d
 }n |dks"|dkr>| }tj|gg||d}|durN||_| S )zXCompiles a node, recursively.

        This is one big switch on the node type.
        r   c                    s   g | ]}  |qS r   r)   .0Zchr%   r   r   
<listcomp>O       z0PatternCompiler.compile_node.<locals>.<listcomp>N   r   c                 S   s   g | ]
}|gqS r   r   )r/   ar   r   r   r1   R   r2   minmaxc                    s   g | ]}  |qS r   r-   r.   r0   r   r   r1   V   r2         )r   r"   ZMatcherchildrenZAlternativeslenr	   WildcardPatternoptimizeZAlternativeZNegatedUnitcompile_basicZNegatedPatternr   EQUALr   ZRepeaterSTARZHUGEPLUSLBRACEget_intname)r%   nodeZaltspZunitspatternrE   nodesrepeatr;   childr6   r7   r   r0   r   r)   C   s^    

 
"

zPatternCompiler.compile_nodec                 C   s@  |d }|j tjkr4tt|j}tt	||S |j tj
kr|j}| r|tvrbtd| |dd  rvtdtt| S |dkrd }n,|dst| j|d }|d u rtd| |dd  r| |d jd g}nd }t||S nH|jdkr| |d S |jd	kr<| |d }tj|ggddd
S d S )Nr   zInvalid token: %rr   zCan't have details for tokenany_zInvalid symbol: %r([r5   )r   r   STRINGr(   r   Z
evalStringr   r	   ZLeafPattern_type_of_literalNAMEisupper	TOKEN_MAPr   
startswithgetattrr#   r)   r;   ZNodePatternr=   )r%   rI   rJ   rF   r   r   Zcontent
subpatternr   r   r   r?      s8    
zPatternCompiler.compile_basicc                 C   s
   t |jS N)intr   )r%   rF   r   r   r   rD      s    zPatternCompiler.get_int)N)FF)N)r   r   r   r&   r,   r)   r?   rD   r   r   r   r   r    &   s
   

G
#r    )rR   rP   NUMBERZTOKENc                 C   s.   | d   rtjS | tjv r&tj|  S d S d S )Nr   )isalphar   rR   r   Zopmap)r   r   r   r   rQ      s
    

rQ   c                 C   s>   |\}}}}|s|| j v r*tj|||dS tj|||dS dS )z9Converts raw node information to a Node or Leaf instance.)contextN)Znumber2symbolr	   ZNodeZLeaf)r   Zraw_node_infor   r   r\   r;   r   r   r   r$      s    r$   c                 C   s   t  | S rX   )r    r,   )rH   r   r   r   r,      s    r,   )__doc__
__author__r   Zpgen2r   r   r   r   r   r    r	   r
   	Exceptionr   r   objectr    rR   rP   rZ   rT   rQ   r$   r,   r   r   r   r   <module>   s"    
 		