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✏️ _ast_gen.cpython-36.pyc
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3 g�wU�! � @ sh d dl Z d dlmZ G dd� de�ZG dd� de�ZdZdZed krdd dl Z ed �Z e j e d d �� dS ) � N)�Templatec @ s( e Zd Zd dd�Zd dd�Zdd� ZdS ) �ASTCodeGenerator� _c_ast.cfgc C s || _ dd� | j|�D �| _dS )zN Initialize the code generator from a configuration file. c S s g | ]\}}t ||��qS � )�NodeCfg)�.0�name�contentsr r � /usr/lib/python3.6/_ast_gen.py� <listcomp> s z-ASTCodeGenerator.__init__.<locals>.<listcomp>N)� cfg_filename� parse_cfgfile�node_cfg)�selfr r r r �__init__ s zASTCodeGenerator.__init__Nc C sH t t�j| jd�}|t7 }x | jD ]}||j� d 7 }q"W |j|� dS )z< Generates the code into file, an open file buffer. )r z N)r �_PROLOGUE_COMMENTZ substituter �_PROLOGUE_CODEr �generate_source�write)r �file�srcr r r r �generate s zASTCodeGenerator.generatec c s� t |d���}x�|D ]�}|j� }| s|jd�r0q|jd�}|jd�}|jd�}|dk sf||ksf||krvtd||f ��|d|� }||d |� }|r�d d � |jd �D �ng } || fV qW W dQ R X dS ) ze Parse the configuration file and yield pairs of (name, contents) for each node. �r�#�:�[�]� zInvalid line in %s: %s Nc S s g | ] }|j � �qS r )�strip)r �vr r r r 7 s z2ASTCodeGenerator.parse_cfgfile.<locals>.<listcomp>�,)�openr � startswith�find� RuntimeError�split) r �filename�f�lineZcolon_iZ lbracket_iZ rbracket_ir �valZvallistr r r r & s z ASTCodeGenerator.parse_cfgfile)r )N)�__name__� __module__� __qualname__r r r r r r r r s r c @ s8 e Zd ZdZdd� Zdd� Zdd� Zdd � Zd d � Zd S ) r z� Node configuration. name: node name contents: a list of contents - attributes and child nodes See comment at the top of the configuration file for details. c C s� || _ g | _g | _g | _g | _x^|D ]V}|jd�}| jj|� |jd�rV| jj|� q$|jd�rn| jj|� q$| jj|� q$W d S )N�*z**)r � all_entries�attr�child� seq_child�rstrip�append�endswith)r r r �entryZ clean_entryr r r r B s zNodeCfg.__init__c C s, | j � }|d| j� 7 }|d| j� 7 }|S )N� )� _gen_init� _gen_children�_gen_attr_names)r r r r r r T s zNodeCfg.generate_sourcec C s� d| j }| jrDdj| j�}djdd� | jD ��}|d7 }d| }nd}d}|d | 7 }|d | 7 }x$| jd g D ]}|d ||f 7 }qrW |S ) Nzclass %s(Node): z, c s s | ]}d j |�V qdS )z'{0}'N)�format)r �er r r � <genexpr>_ s z$NodeCfg._gen_init.<locals>.<genexpr>z, 'coord', '__weakref__'z(self, %s, coord=None)z'coord', '__weakref__'z(self, coord=None)z __slots__ = (%s) z def __init__%s: Zcoordz self.%s = %s )r r. �join)r r �args�slotsZarglistr r r r r7 Z s zNodeCfg._gen_initc C sl d}| j r`|d7 }x | jD ]}|d t|d� 7 }qW x | jD ]}|dt|d� 7 }q<W |d7 }n|d7 }|S ) Nz def children(self): z nodelist = [] z& if self.%(child)s is not None:z0 nodelist.append(("%(child)s", self.%(child)s)) )r0 zu for i, child in enumerate(self.%(child)s or []): nodelist.append(("%(child)s[%%d]" %% i, child)) z return tuple(nodelist) z return () zV if self.%(child)s is not None: nodelist.append(("%(child)s", self.%(child)s)) )r. r0 �dictr1 )r r r0 r1 r r r r8 n s zNodeCfg._gen_childrenc C s" ddj dd� | jD �� d }|S )Nz attr_names = (� c s s | ]}d | V qdS )z%r, Nr )r Znmr r r r< � s z*NodeCfg._gen_attr_names.<locals>.<genexpr>�))r= r/ )r r r r r r9 � s zNodeCfg._gen_attr_namesN) r* r+ r, �__doc__r r r7 r8 r9 r r r r r ; s r a� #----------------------------------------------------------------- # ** ATTENTION ** # This code was automatically generated from the file: # $cfg_filename # # Do not modify it directly. Modify the configuration file and # run the generator again. # ** ** *** ** ** # # pycparser: c_ast.py # # AST Node classes. # # Copyright (C) 2008-2015, Eli Bendersky # License: BSD #----------------------------------------------------------------- a� import sys class Node(object): __slots__ = () """ Abstract base class for AST nodes. """ def children(self): """ A sequence of all children that are Nodes """ pass def show(self, buf=sys.stdout, offset=0, attrnames=False, nodenames=False, showcoord=False, _my_node_name=None): """ Pretty print the Node and all its attributes and children (recursively) to a buffer. buf: Open IO buffer into which the Node is printed. offset: Initial offset (amount of leading spaces) attrnames: True if you want to see the attribute names in name=value pairs. False to only see the values. nodenames: True if you want to see the actual node names within their parents. showcoord: Do you want the coordinates of each Node to be displayed. """ lead = ' ' * offset if nodenames and _my_node_name is not None: buf.write(lead + self.__class__.__name__+ ' <' + _my_node_name + '>: ') else: buf.write(lead + self.__class__.__name__+ ': ') if self.attr_names: if attrnames: nvlist = [(n, getattr(self,n)) for n in self.attr_names] attrstr = ', '.join('%s=%s' % nv for nv in nvlist) else: vlist = [getattr(self, n) for n in self.attr_names] attrstr = ', '.join('%s' % v for v in vlist) buf.write(attrstr) if showcoord: buf.write(' (at %s)' % self.coord) buf.write('\n') for (child_name, child) in self.children(): child.show( buf, offset=offset + 2, attrnames=attrnames, nodenames=nodenames, showcoord=showcoord, _my_node_name=child_name) class NodeVisitor(object): """ A base NodeVisitor class for visiting c_ast nodes. Subclass it and define your own visit_XXX methods, where XXX is the class name you want to visit with these methods. For example: class ConstantVisitor(NodeVisitor): def __init__(self): self.values = [] def visit_Constant(self, node): self.values.append(node.value) Creates a list of values of all the constant nodes encountered below the given node. To use it: cv = ConstantVisitor() cv.visit(node) Notes: * generic_visit() will be called for AST nodes for which no visit_XXX method was defined. * The children of nodes for which a visit_XXX was defined will not be visited - if you need this, call generic_visit() on the node. You can use: NodeVisitor.generic_visit(self, node) * Modeled after Python's own AST visiting facilities (the ast module of Python 3.0) """ def visit(self, node): """ Visit a node. """ method = 'visit_' + node.__class__.__name__ visitor = getattr(self, method, self.generic_visit) return visitor(node) def generic_visit(self, node): """ Called if no explicit visitor function exists for a node. Implements preorder visiting of the node. """ for c_name, c in node.children(): self.visit(c) �__main__z _c_ast.cfgzc_ast.py�w) �pprint�stringr �objectr r r r r* �sysZast_genr r! r r r r �<module> s *br
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