Your IP : 216.73.216.75
3
\�5�@sdddlmZmZmZGdd�dej�ZGdd�de�ZGdd�de�ZGdd �d e�Z ddd�Z
d
S)�)�grammar�token�tokenizec@seZdZdS)�PgenGrammarN)�__name__�
__module__�__qualname__�r r �*/usr/lib64/python3.6/lib2to3/pgen2/pgen.pyrsrc@s�eZdZd&dd�Zdd�Zdd�Zdd �Zd
d�Zdd
�Zdd�Z dd�Z
dd�Zdd�Zdd�Z
dd�Zdd�Zdd�Zdd�Zd'd d!�Zd"d#�Zd$d%�ZdS)(�ParserGeneratorNcCsld}|dkrt|�}|j}||_||_tj|j�|_|j�|j �\|_
|_|dk rZ|�i|_|j
�dS)N)�open�close�filename�streamr�generate_tokens�readline� generator�gettoken�parse�dfas�startsymbol�first�addfirstsets)�selfrrZclose_streamr r r
�__init__szParserGenerator.__init__cCs*t�}t|jj��}|j�|j|j�|jd|j�x.|D]&}dt|j �}||j |<||j
|<q<Wx�|D]�}|j|}g}xl|D]d}g}x6t|jj
��D]$\} }
|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_grammars.
zParserGenerator.make_grammarcCs8|j|}i}x$t|�D]}|j||�}d||<qW|S)Nr)rr$r()rr.r0Zrawfirstrr4�ilabelr r r
r,4s
zParserGenerator.make_firstcCsbt|j�}|dj�r�||jkrZ||jkr4|j|S|jj|j|df�||j|<|Snbtt|d�}t|t �sxt
|��|tjks�t
|��||jkr�|j|S|jj|df�||j|<|Sn�|ddks�t
|��t
|�}|dj��r ||jk�r�|j|S|jjtj|f�||j|<|Sn>tj|}||jk�r@|j|S|jj|df�||j|<|SdS)Nr�"�')r8r9)r"Zlabels�isalphar#Zsymbol2labelr'�getattrr�
isinstance�int�AssertionError�tok_name�tokens�eval�keywords�NAMErZopmap)rr.r4r7Zitoken�valuer r r
r(=s<
zParserGenerator.make_labelcCs<t|jj��}|j�x |D]}||jkr|j|�qWdS)N)rrrrr� calcfirst)rr/r0r r r
rks
zParserGenerator.addfirstsetsc Cs
|j|}d|j|<|d}i}i}x�|jj�D]x\}}||jkr�||jkrl|j|}|dkr�td|��n|j|�|j|}|j|�|||<q0d||<|di||<q0Wi} xJ|j�D]>\}}
x4|
D],}|| kr�td|||| |f��|| |<q�Wq�W||j|<dS)Nrzrecursion for rule %rrzArule %s is ambiguous; %s is in the first sets of %s as well as %s)rrr%r&�
ValueErrorrE�update)rr0r2r3ZtotalsetZoverlapcheckr4r5�fsetZinverseZitsfirstZsymbolr r r
rEss2
zParserGenerator.calcfirstc Cs�i}d}x�|jtjkr�x|jtjkr.|j�qW|jtj�}|jtjd�|j�\}}|jtj�|j ||�}t
|�}|j|�t
|�}|||<|dkr
|}q
W||fS)N�:)�typer� ENDMARKER�NEWLINEr�expectrC�OP� parse_rhs�make_dfar"�simplify_dfa) rrrr0�a�zr2ZoldlenZnewlenr r r
r�s"
zParserGenerator.parsecs�t|t�st�t|t�st��fdd�}�fdd��t||�|�g}x�|D]�}i}x<|jD]2}x,|jD]"\}} |dk rf�| |j|i��qfWqZWxRt|j��D]B\}}
x,|D]}|j|
kr�Pq�Wt|
|�}|j |�|j
||�q�WqJW|S)Ncsi}�||�|S)Nr )r3�base)�
addclosurer r
�closure�s
z)ParserGenerator.make_dfa.<locals>.closurecsLt|t�st�||krdSd||<x$|jD]\}}|dkr*�||�q*WdS)Nr)r<�NFAStater>r%)r3rTr4r5)rUr r
rU�sz,ParserGenerator.make_dfa.<locals>.addclosure)r<rWr>�DFAState�nfasetr%�
setdefaultr$r&r'�addarc)rr-�finishrVr+r3r%Znfastater4r5rY�str )rUr
rP�s&
zParserGenerator.make_dfac
Cs�td|�|g}x�t|�D]�\}}td|||kr4dp6d�x^|jD]T\}}||kr^|j|�} nt|�} |j|�|dkr�td| �qBtd|| f�qBWqWdS)NzDump of NFA forz Statez(final)�z -> %dz %s -> %d)�print� enumerater%r)r"r')
rr0r-r\Ztodor1r3r4r5�jr r r
�dump_nfa�s
zParserGenerator.dump_nfacCsltd|�x\t|�D]P\}}td||jr,dp.d�x0t|jj��D]\}}td||j|�f�qBWqWdS)NzDump of DFA forz Statez(final)r^z %s -> %d)r_r`r*r$r%r&r))rr0r2r1r3r4r5r r r
�dump_dfa�s
zParserGenerator.dump_dfacCs~d}xt|rxd}xft|�D]Z\}}xPt|dt|��D]:}||}||kr4||=x|D]}|j||�qTWd}Pq4WqWqWdS)NTFr)r`�ranger"�
unifystate)rr2Zchangesr1Zstate_iraZstate_jr3r r r
rQ�s
zParserGenerator.simplify_dfacCs�|j�\}}|jdkr||fSt�}t�}|j|�|j|�x6|jdkrt|j�|j�\}}|j|�|j|�q@W||fSdS)N�|)� parse_altrDrWr[r)rrRrSZaaZzzr r r
rO�s
zParserGenerator.parse_rhscCsP|j�\}}x:|jdks*|jtjtjfkrF|j�\}}|j|�|}qW||fS)N�(�[)rhri)�
parse_itemrDrJrrC�STRINGr[)rrR�br.�dr r r
rg
s
zParserGenerator.parse_altcCs�|jdkr>|j�|j�\}}|jtjd�|j|�||fS|j�\}}|j}|dkr`||fS|j�|j|�|dkr�||fS||fSdS)Nri�]�+�*)rorp)rDrrOrMrrNr[�
parse_atom)rrRrSrDr r r
rjs
zParserGenerator.parse_itemcCs�|jdkr4|j�|j�\}}|jtjd�||fS|jtjtjfkrpt �}t �}|j
||j�|j�||fS|jd|j|j�dS)Nrh�)z+expected (...) or NAME or STRING, got %s/%s)rDrrOrMrrNrJrCrkrWr[�raise_error)rrRrSr r r
rq(s
zParserGenerator.parse_atomcCsD|j|ks|dk r2|j|kr2|jd|||j|j�|j}|j�|S)Nzexpected %s/%s, got %s/%s)rJrDrsr)rrJrDr r r
rM9szParserGenerator.expectcCsJt|j�}x"|dtjtjfkr,t|j�}qW|\|_|_|_|_|_ dS)Nr)
r5rr�COMMENT�NLrJrDZbegin�end�line)r�tupr r r
rAs
zParserGenerator.gettokencGs^|r8y||}Wn&dj|gttt|���}YnXt||j|jd|jd|jf��dS)N� rr)�joinr�map�str�SyntaxErrorrrvrw)r�msg�argsr r r
rsHs zParserGenerator.raise_error)N)N)rrrrr6r,r(rrErrPrbrcrQrOrgrjrqrMrrsr r r r
r
s$
.$
rc@seZdZdd�Zddd�ZdS)rWcCs
g|_dS)N)r%)rr r r
rSszNFAState.__init__NcCs8|dkst|t�st�t|t�s$t�|jj||f�dS)N)r<r|r>rWr%r')rr5r4r r r
r[VszNFAState.addarc)N)rrrrr[r r r r
rWQsrWc@s0eZdZdd�Zdd�Zdd�Zdd�Zd Zd S)
rXcCsLt|t�st�ttt|��t�s$t�t|t�s2t�||_||k|_i|_dS)N) r<�dictr>r5�iterrWrYr*r%)rrY�finalr r r
r]s
zDFAState.__init__cCs8t|t�st�||jkst�t|t�s*t�||j|<dS)N)r<r|r>r%rX)rr5r4r r r
r[eszDFAState.addarccCs.x(|jj�D]\}}||kr||j|<qWdS)N)r%r&)r�old�newr4r5r r r
rekszDFAState.unifystatecCsft|t�st�|j|jkrdSt|j�t|j�kr6dSx*|jj�D]\}}||jj|�k rBdSqBWdS)NFT)r<rXr>r*r"r%r&�get)r�otherr4r5r r r
�__eq__pszDFAState.__eq__N)rrrrr[rer��__hash__r r r r
rX[s
rX�Grammar.txtcCst|�}|j�S)N)rr6)r�pr r r
�generate_grammar�sr�N)r�)r^rrrZGrammarr�objectrrWrXr�r r r r
�<module>sI
%
?>