Your IP : 18.118.144.50
U
i�f� � @ s� d Z dZddlZddlmZmZmZmZmZm Z ddl
m Z ddl
m Z G dd � d e
�Zd
d � ZG d d
� d
e�Zejejejdd�Zdd� Zdd� Zdd� ZdS )z�Pattern 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 Zd ZdS )�PatternSyntaxErrorN)�__name__�
__module__� __qualname__� r r �4/opt/alt/python38/lib64/python3.8/lib2to3/patcomp.pyr s r c c sL t jt jt jh}t�t�| �j�}|D ] }|\}}}}}||kr&|V q&dS )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 Zd Zd
dd�Zddd�Zdd� Zdd d
�Zd d � ZdS )�PatternCompilerNc C sZ |dkrt j| _t j| _nt�|�| _t �| j�| _t j| _ t j
| _ tj | jt
d�| _dS )z^Initializer.
Takes an optional alternative filename for the pattern grammar.
N)Zconvert)r
Zpattern_grammarr Zpattern_symbols�symsr Z load_grammarZSymbolsZpython_grammarZ pygrammarZpython_symbols�pysymsZDriver�pattern_convert)�selfZ grammar_filer r r �__init__( s
zPatternCompiler.__init__Fc
C sp t |�}z| jj||d�}W n2 tjk
rN } ztt|��d�W 5 d}~X Y nX |rb| �|�|fS | �|�S dS )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
s� |j � jjkr|jd }|j � jjkrz� fdd�|jddd� D �}t|�dkrX|d S tjdd� |D �ddd�}|�� S |j � jj krʇ fd d�|jD �}t|�dkr�|d S tj|gddd�}|�� S |j � jj
kr�� � |jdd� �}t� |�}|�� S |j � jj
k�st�d}|j}t|�d
k�rR|d j tjk�rR|d j}|dd� }d}t|�dk�r�|d j � jjk�r�|d }|dd � }� � ||�}|dk �r�|j � jjk�s�t�|j} | d }
|
j tjk�r�d} tj} n�|
j tjk�r�d} tj} np|
j tjk�r^| d j tjk�s t�t| �d k�s.t�� �| d � } } t| �d
k�rh� �| d
�} n
d�sht�| dk�s|| dk�r�|�� }tj|gg| | d�}|dk �r�||_|�� S )zXCompiles a node, recursively.
This is one big switch on the node type.
r c s g | ]}� � |��qS r �r( ��.0Zch�r$ r r �
<listcomp>O s z0PatternCompiler.compile_node.<locals>.<listcomp>N� r c S s g | ]
}|g�qS r r )r. �ar r r r0 R s ��min�maxc s g | ]}� � |��qS r r, r- r/ r r r0 V s � ���)r6 � r8 F)r r! ZMatcher�childrenZ Alternatives�lenr �WildcardPattern�optimizeZ AlternativeZ NegatedUnit�
compile_basicZNegatedPatternZUnit�AssertionErrorr �EQUALr ZRepeater�STARZHUGE�PLUS�LBRACE�RBRACE�get_int�name)
r$ �nodeZalts�pZunits�patternrE �nodes�repeatr9 Zchildr4 r5 r r/ r r( C sh
"
z PatternCompiler.compile_nodec C sn t |�dkst�|d }|jtjkrDtt�|j��}t �
t |�|�S |jtj k�r|j}|�
� r�|tkrttd| ��|dd � r�td��t �
t| �S |dkr�d }n,|�d�s�t| j|d �}|d kr�td| ��|dd � r�| �|d jd �g}nd }t �||�S nV|jdk�r | �|d �S |jd k�r\|d k�s:t�| �|d �}t j|ggddd
�S d �sjt|��d S ) Nr r zInvalid token: %rz Can't have details for token�any�_zInvalid symbol: %r�(�[r3 F)r: r> r r �STRINGr' r Z
evalStringr r Z LeafPattern�_type_of_literal�NAME�isupper� TOKEN_MAPr �
startswith�getattrr" r( r9 Z NodePatternr; )r$ rI rJ rF r r Zcontent�
subpatternr r r r= � s<
z PatternCompiler.compile_basicc C s |j tjkst�t|j�S �N)r r �NUMBERr> �intr )r$ rF r r r rD � s zPatternCompiler.get_int)N)FF)N)r r
r r% r+ r( r= rD r r r r r & s
G
#r )rQ rO rX ZTOKENc C s. | d � � rtjS | tjkr&tj| S d S d S )Nr )�isalphar rQ r Zopmap)r r r r rP � s
rP c C s> |\}}}}|s|| j kr*tj|||d�S tj|||d�S dS )z9Converts raw node information to a Node or Leaf instance.)�contextN)Z
number2symbolr ZNodeZLeaf)r Z
raw_node_infor r r[ r9 r r r r# � s r# c C s t � �| �S rW )r r+ )rH r r r r+ � s r+ )�__doc__�
__author__r Zpgen2r r r r r r � r r
� Exceptionr r �objectr rQ rO rX rS rP r# r+ r r r r �<module> s"
�