ikan Uploader :
Directory : /lib64/python3.6/lib2to3/pgen2/__pycache__/
Upload File : |
| Current File : //lib64/python3.6/lib2to3/pgen2/__pycache__/pgen.cpython-36.opt-2.pyc |
3
\�5 � @ sd d dl mZmZmZ G dd� dej�ZG dd� de�ZG dd� de�ZG dd � d e�Z dd d �Z
d
S )� )�grammar�token�tokenizec @ s e Zd ZdS )� PgenGrammarN)�__name__�
__module__� __qualname__� r r �*/usr/lib64/python3.6/lib2to3/pgen2/pgen.pyr s r c @ s� e Zd Zd&dd�Zdd� Zdd� Zdd � Zd
d � Zd d
� Zdd� Z dd� Z
dd� Z dd� Z dd� Z
dd� Zdd� Zd d � Zd d � Zd'd d!�Zd"d#� Zd$d%� ZdS )(�ParserGeneratorNc C sl d }|d krt |�}|j}|| _|| _tj|j�| _| j� | j � \| _
| _ |d k rZ|� i | _ | j
� d S )N)�open�close�filename�streamr �generate_tokens�readline� generator�gettoken�parse�dfas� startsymbol�first� addfirstsets)�selfr r Z close_streamr r r
�__init__ s zParserGenerator.__init__c C s* t � }t| jj� �}|j� |j| j� |jd| j� x.|D ]&}dt|j � }||j |< ||j
|< q<W x�|D ]�}| j| }g }xl|D ]d}g }x6t |j j
� �D ]$\} }
|j| j|| �|j|
�f� q�W |jr�|jd|j|�f� |j|� q�W |jj|� || j||�f|j|j | < qlW |j | j |_|S )N� � )r �listr �keys�sort�remover �insert�len�
symbol2numberZ
number2symbol�sorted�arcs�items�append�
make_label�index�isfinal�states�
make_first�start) r �c�names�name�i�dfar+ �stater% �label�nextr r r
� make_grammar s.
z ParserGenerator.make_grammarc C s8 | j | }i }x$t|�D ]}| j||�}d||< qW |S )Nr )r r$ r( )r r. r0 Zrawfirstr r4 �ilabelr r r
r, 4 s
zParserGenerator.make_firstc C s& t |j�}|d j� r�||jkrZ||jkr4|j| S |jj|j| d f� ||j|< |S n>tt|d �}||jkrz|j| S |jj|d f� ||j|< |S n�t |�}|d j� r�||j
kr�|j
| S |jjtj |f� ||j
|< |S n>t j
| }||jk�r|j| S |jj|d f� ||j|< |S d S )Nr )r" Zlabels�isalphar# Z symbol2labelr' �getattrr �tokens�eval�keywords�NAMEr Zopmap)r r. r4 r7 Zitoken�valuer r r
r( = s6
zParserGenerator.make_labelc C s< t | jj� �}|j� x |D ]}|| jkr | j|� q W d S )N)r r r r r � calcfirst)r r/ r0 r r r
r k s
z ParserGenerator.addfirstsetsc C s
| j | }d | j|< |d }i }i }x�|jj� D ]x\}}|| j kr�|| jkrl| j| }|d kr�td| ��n| j|� | j| }|j|� |||< q0d||< |di||< q0W i } xJ|j� D ]>\}}
x4|
D ],} | | kr�td|| || | f ��|| | < q�W q�W || j|< d S )Nr zrecursion for rule %rr zArule %s is ambiguous; %s is in the first sets of %s as well as %s)r r r% r& �
ValueErrorr? �update) r r0 r2 r3 ZtotalsetZ overlapcheckr4 r5 �fsetZinverseZitsfirstZsymbolr r r
r? s s2
zParserGenerator.calcfirstc C s� i }d }x�| j tjkr�x| j tjkr.| j� qW | jtj�}| jtjd� | j� \}}| jtj� | j ||�}t
|�}| j |� t
|�}|||< |d kr
|}q
W ||fS )N�:) �typer � ENDMARKER�NEWLINEr �expectr= �OP� parse_rhs�make_dfar" � simplify_dfa) r r r r0 �a�zr2 ZoldlenZnewlenr r r
r � s"
zParserGenerator.parsec s� � fdd�}� fdd�� t ||�|�g}x�|D ]�}i }x<|jD ]2}x,|jD ]"\}} |d k rJ� | |j|i �� qJW q>W xRt|j� �D ]B\}}
x,|D ]} | j|
kr�P q�W t |
|�} |j| � |j| |� q�W q.W |S )Nc s i }� | |� |S )Nr )r3 �base)�
addclosurer r
�closure� s
z)ParserGenerator.make_dfa.<locals>.closurec s> | |kr d S d|| < x$| j D ]\}}|d kr � ||� q W d S )Nr )r% )r3 rN r4 r5 )rO r r
rO � s z,ParserGenerator.make_dfa.<locals>.addclosure)�DFAState�nfasetr% �
setdefaultr$ r& r' �addarc) r r- �finishrP r+ r3 r% Znfastater4 r5 rR �str )rO r
rJ � s"
zParserGenerator.make_dfac
C s� t d|� |g}x�t|�D ]�\}}t d|||kr4dp6d� x^|jD ]T\}}||kr^|j|�} nt|�} |j|� |d kr�t d| � qBt d|| f � qBW qW d S )NzDump of NFA forz Statez(final)� z -> %dz %s -> %d)�print� enumerater% r) r" r' )
r r0 r- rU Ztodor1 r3 r4 r5 �jr r r
�dump_nfa� s
zParserGenerator.dump_nfac C sl t d|� x\t|�D ]P\}}t d||jr,dp.d� x0t|jj� �D ] \}}t d||j|�f � qBW qW d S )NzDump of DFA forz Statez(final)rW z %s -> %d)rX rY r* r$ r% r& r) )r r0 r2 r1 r3 r4 r5 r r r
�dump_dfa� s
zParserGenerator.dump_dfac C s~ d}xt|rxd}xft |�D ]Z\}}xPt|d t|��D ]:}|| }||kr4||= x|D ]}|j||� qTW d}P q4W qW qW d S )NTFr )rY �ranger" �
unifystate)r r2 Zchangesr1 Zstate_irZ Zstate_jr3 r r r
rK � s
z ParserGenerator.simplify_dfac C s� | j � \}}| jdkr ||fS t� }t� }|j|� |j|� x6| jdkrt| j� | j � \}}|j|� |j|� q@W ||fS d S )N�|)� parse_altr> �NFAStaterT r )r rL rM ZaaZzzr r r
rI � s
zParserGenerator.parse_rhsc C sP | j � \}}x:| jdks*| jtjtjfkrF| j � \}}|j|� |}qW ||fS )N�(�[)rb rc )�
parse_itemr> rD r r= �STRINGrT )r rL �br. �dr r r
r`
s
zParserGenerator.parse_altc C s� | j dkr>| j� | j� \}}| jtjd� |j|� ||fS | j� \}}| j }|dkr`||fS | j� |j|� |dkr�||fS ||fS d S )Nrc �]�+�*)ri rj )r> r rI rG r rH rT �
parse_atom)r rL rM r> r r r
rd s
zParserGenerator.parse_itemc C s� | j dkr4| j� | j� \}}| jtjd� ||fS | jtjtjfkrpt � }t � }|j
|| j � | j� ||fS | j d| j| j � d S )Nrb �)z+expected (...) or NAME or STRING, got %s/%s) r> r rI rG r rH rD r= re ra rT � raise_error)r rL rM r r r
rk ( s
zParserGenerator.parse_atomc C sD | j |ks |d k r2| j|kr2| jd||| j | j� | j}| j� |S )Nzexpected %s/%s, got %s/%s)rD r> rm r )r rD r> r r r
rG 9 s zParserGenerator.expectc C sJ t | j�}x"|d tjtjfkr,t | j�}q W |\| _| _| _| _| _ d S )Nr )
r5 r r �COMMENT�NLrD r> Zbegin�end�line)r �tupr r r
r A s
zParserGenerator.gettokenc G s^ |r8y || }W n& dj |gttt|�� �}Y nX t|| j| jd | jd | jf��d S )N� r r )�joinr �map�str� SyntaxErrorr rp rq )r �msg�argsr r r
rm H s zParserGenerator.raise_error)N)N)r r r r r6 r, r( r r? r rJ r[ r\ rK rI r` rd rk rG r rm r r r r
r
s$
. $
r c @ s e Zd Zdd� Zddd�ZdS )ra c C s
g | _ d S )N)r% )r r r r
r S s zNFAState.__init__Nc C s | j j||f� d S )N)r% r' )r r5 r4 r r r
rT V s zNFAState.addarc)N)r r r r rT r r r r
ra Q s ra c @ s0 e Zd Zdd� Zdd� Zdd� Zdd� Zd Zd S )
rQ c C s || _ ||k| _i | _d S )N)rR r* r% )r rR �finalr r r
r ] s
zDFAState.__init__c C s || j |< d S )N)r% )r r5 r4 r r r
rT e s zDFAState.addarcc C s. x(| j j� D ]\}}||kr || j |< q W d S )N)r% r& )r �old�newr4 r5 r r r
r^ k s zDFAState.unifystatec C sX | j |j krdS t| j�t|j�kr(dS x*| jj� D ] \}}||jj|�k r4dS q4W dS )NFT)r* r" r% r& �get)r �otherr4 r5 r r r
�__eq__p s zDFAState.__eq__N)r r r r rT r^ r �__hash__r r r r
rQ [ s
rQ � Grammar.txtc C s t | �}|j� S )N)r r6 )r �pr r r
�generate_grammar� s r� N)r� ) rW r r r ZGrammarr �objectr ra rQ r� r r r r
�<module> s I
%
........