��Qc@s�dZd
Z
ddgZddlZddlZddlZddlZddlZddlm	Z	m
Z
mZmZm
Z

def
d��YZd	deedd
�Zd�Zd�Zed
kr�jee���
ndS(sZParser driver.

This provides a high-level interface to parse a file into a syntax tree.

s#Guido van Rossum <[email protected]>tDrivertload_grammari�Ni
(tgrammartparsettokenttokenizetpgencBsVeZ
ddd�Zed
�Zed�Zed�Zded�Zed�Z	RS(cCs:|
|_|dkr$tj�}n||_||_dS(
N(RtNonetloggingt	getLoggertloggertconvert(tselfRRR
((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyt__init__s

	


	
cCstj
|j|j�}|j�
d
}d}d	}}}}	}
d}x�|
D]�}|\}}}}	}
|||fkr�\}
}||
kr�|d|
|7}|
}d}n||kr�|
||!7}|}q�|tjtjfkr6
||7}|	\}}|j	d�rQ|d
7}d}qQqQn|t
jkrU
tj|}n|r~
|j
jdt
j|||�
n|j||||f�r�|r�|j
jd�
nPnd}|	\}}|j	d�rQ|d
7}d}qQqQWtjd||||f��|jS(
s4Parse a series of tokens and return the syntax tree.i
ius

s%s %r (prefix=%r)sStop.tsincomplete inputN(RtParserRRtsetupRRtCOMMENTtNLtendswithRtOPtopmapR
tdebugttok_nametaddtokent
ParseErrortrootnode(RttokensRt
ptlinenotcolumnttypetvaluetstarttendt	line_texttprefixt	quintuplets_linenots_column((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pytparse_tokens&sR













	










	
















	

cCs"tj
|
j�}|j||�S(
s*Parse a stream and return the syntax tree.(Rtgenerate_tokenstreadlineR((RtstreamRR((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pytparse_stream_rawVs
cCs|j|
|�S(
s*Parse a stream and return the syntax tree.(
R,(RR+R((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pytparse_stream[scCs;tj
|
d
|�}z|j||�SWd|j�
XdS(s(Parse a file and return the syntax tree.t
rN(tcodecstopenR-tclose(RtfilenametencodingRR+((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyt
parse_file_s

cCs+tj
tj|
�j�}|j||�S(
s*Parse a string and return the syntax tree.(RR)tStringIOR*R((RttextRR((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pytparse_stringgs
N(
t__name__t
__module__RR
tFalseR(R,R-R4R7(((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyRs0sGrammar.txtc	Cs*
|dkrt
j�}n|
dkr~tjj|�\}}|d
krTd}n||djttt	j
��d}
n|s�t|
|�r

|jd|�
t
j|�}|r&
|jd|
�
y|j|
�
Wq

tk
r

}
|jdt|��
q

Xq&
ntj�}|j|
�
|S(	s'Load the grammar (maybe from a pickle).s.txtRt
.s.pickles!Generating grammar tables from %ssWriting grammar tables to %ssWriting failed:N(RRR	tostpathtsplitexttjointmaptstrtsystversion_infot_newertinfoRtgenerate_grammartdumptIOErrorRtGrammartload(	tgttgptsavetforceR
theadttailt
gt
e((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyR
ms&




	
*








!


cCsNtj
j|�stStj
j|
�s,tStj
j|�tj
j|
�kS(
s0Inquire whether file a was written since file b.(R<R=texistsR:tTruetgetmtime(t
at
b((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyRD�s




cGsc|stj
d
}ntjdtjdtjdd�
x$|D]}
t|
dtdt�
q?WtS(s�Main program, when run as a script: produce grammar pickle files.

    Calls load_grammar for each argument, a path to a grammar text file.
    i
tlevelR+tformats%(message)sRMRN(RBtargvRtbasicConfigtINFOtstdoutR
RT(targsRK((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pytmain�s






t__main__(t__doc__t
__author__t__all__R/R<RR5RBRRRRRRtobjectRRRTR:R
RDR_R8texittint(((s*/sys/lib/python2.7/lib2to3/pgen2/driver.pyt<module>s



(P