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Code Editor : pgen.cpython-310.pyc
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r � calcfirst)r r2 r3 r r r r k s ��z ParserGenerator.addfirstsetsc C s� | j | }d | j|< |d }i }i }|j�� D ]<\}}|| j v rI|| jv r5| j| }|d u r4td| ��n | �|� | j| }|�|� |||< qd||< |di||< qi } |�� D ] \}} | D ]} | | v rrtd|| || | f ��|| | < q`qZ|| 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) � ValueErrorrN �update) r r3 r5 r6 �totalset� overlapcheckr7 r8 �fset�inverse�itsfirst�symbolr r r rN s s8 � � �zParserGenerator.calcfirstc C s� i }d }| j tjkrV| j tjkr| �� | j tjks| �tj�}| �tjd� | �� \}}| �tj� | � ||�}t |�}| � |� t |�}|||< |d u rP|}| j tjks ||fS )N�:) �typer � ENDMARKER�NEWLINEr �expectrI �OP� parse_rhs�make_dfar$ � simplify_dfa) r r r r3 �a�zr5 �oldlen�newlenr r r r � s& � �zParserGenerator.parsec s� t |t�sJ �t |t�sJ �� fdd�}� fdd�� t||�|�g}|D ]F}i }|jD ]}|jD ]\}} |d urA� | |�|i �� q0q+t|�� �D ] \}} |D ] } | j| krX n qOt| |�} |�| � |� | |� qIq$|S )Nc s i }� | |� |S rM r )r6 �base�� addclosurer r �closure� s z)ParserGenerator.make_dfa.<locals>.closurec sH t | t�sJ �| |v r d S d|| < | jD ] \}}|d u r!� ||� qd S r: )rC �NFAStater( )r6 rd r7 r8 re r r rf � s ��z,ParserGenerator.make_dfa.<locals>.addclosure) rC rh �DFAState�nfasetr( � setdefaultr' r) r* �addarc) r r0 �finishrg r. r6 r( �nfastater7 r8 rj �str re r r^ � s. �� � �zParserGenerator.make_dfac C s� t d|� |g}t|�D ]>\}}t d|||u rdpd� |jD ]*\}}||v r-|�|�} n t|�} |�|� |d u rAt d| � q t d|| f � q q d S )NzDump of NFA for� State�(final)� z -> %d� %s -> %d)�print� enumerater( r, r$ r* ) r r3 r0 rm �todor4 r6 r7 r8 �jr r r �dump_nfa� s ��zParserGenerator.dump_nfac C sd t d|� t|�D ]&\}}t d||jrdpd� t|j�� �D ]\}}t d||�|�f � q q d S )NzDump of DFA forrp rq rr rs )rt ru r- r' r( r) r, )r r3 r5 r4 r6 r7 r8 r r r �dump_dfa� s ��zParserGenerator.dump_dfac C sv d}|r9d}t |�D ]*\}}t|d t|��D ] }|| }||kr3||= |D ]}|�||� q&d} nqq |sd S d S )NTFr )ru �ranger$ � unifystate)r r5 �changesr4 �state_irw �state_jr6 r r r r_ � s �� �z ParserGenerator.simplify_dfac C s� | � � \}}| jdkr||fS t� }t� }|�|� |�|� | jdkr=| �� | � � \}}|�|� |�|� | jdks$||fS )N�|)� parse_altrL rh rl r )r r` ra �aa�zzr r r r] � s �zParserGenerator.parse_rhsc C sf | � � \}}| jdv s| jtjtjfv r/| � � \}}|�|� |}| jdv s| jtjtjfv s||fS )N)�(�[)� parse_itemrL rX r rI �STRINGrl )r r` �br1 �dr r r r� s �zParserGenerator.parse_altc C s� | j dkr | �� | �� \}}| �tjd� |�|� ||fS | �� \}}| j }|dvr0||fS | �� |�|� |dkrA||fS ||fS )Nr� �])�+�*r� )rL r r] r[ r r\ rl � parse_atom)r r` ra rL r r r r� s zParserGenerator.parse_itemc C s� | j dkr| �� | �� \}}| �tjd� ||fS | jtjtjfv r8t � }t � }|� || j � | �� ||fS | � d| j| j � d S )Nr� �)z+expected (...) or NAME or STRING, got %s/%s) rL r r] r[ r r\ rX rI r� rh rl � raise_error)r r` ra r r r r� ( s �zParserGenerator.parse_atomc C sD | j |ks|d ur| j|kr| �d||| j | j� | j}| �� |S )Nzexpected %s/%s, got %s/%s)rX rL r� r )r rX rL r r r r[ 9 s �zParserGenerator.expectc C sX t | j�}|d tjtjfv r t | j�}|d tjtjfv s|\| _| _| _| _| _ d S )Nr ) r8 r r �COMMENT�NLrX rL �begin�end�line)r �tupr r r r A s � zParserGenerator.gettokenc G sV |rz|| }W n d� |gttt|�� �}Y t|| j| jd | jd | jf��)N� r r )�joinr �map�str� SyntaxErrorr r� r� )r �msg�argsr r r r� H s �zParserGenerator.raise_errorrM )r r r r r9 r/ r+ r rN r r^ rx ry r_ r] r� r� r� r[ r r� r r r r r s& . $ r c @ s e Zd Zdd� Zddd�ZdS )rh c C s g | _ d S rM )r( )r r r r r S s zNFAState.__init__Nc C s8 |d u s t |t�s J �t |t�sJ �| j�||f� d S rM )rC r� rh r( r* �r r8 r7 r r r rl V s zNFAState.addarcrM )r r r r rl r r r r rh Q s rh c @ s0 e Zd Zdd� Zdd� Zdd� Zdd� Zd Zd S ) ri c C sL t |t�sJ �t tt|��t�sJ �t |t�sJ �|| _||v | _i | _d S rM )rC �dictr8 �iterrh rj r- r( )r rj �finalr r r r ] s zDFAState.__init__c C s8 t |t�sJ �|| jvsJ �t |t�sJ �|| j|< d S rM )rC r� r( ri r� r r r rl e s zDFAState.addarcc C s* | j �� D ] \}}||u r|| j |< qd S rM )r( r) )r �old�newr7 r8 r r r r{ k s ��zDFAState.unifystatec C sd t |t�sJ �| j|jkrdS t| j�t|j�krdS | j�� D ]\}}||j�|�ur/ dS q dS )NFT)rC ri r- r$ r( r) �get)r �otherr7 r8 r r r �__eq__p s �zDFAState.__eq__N)r r r r rl r{ r� �__hash__r r r r ri [ s ri � Grammar.txtc C s t | �}|�� S rM )r r9 )r �pr r r �generate_grammar� s r� N)r� ) rr r r r �Grammarr �objectr rh ri r� r r r r �<module> s I %
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