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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.
#
# Eli Bendersky [https://eli.thegreenplace.net/]
# License: BSD
#-----------------------------------------------------------------
a3
import sys
def _repr(obj):
"""
Get the representation of an object, with dedicated pprint-like format for lists.
"""
if isinstance(obj, list):
return '[' + (',\n '.join((_repr(e).replace('\n', '\n ') for e in obj))) + '\n]'
else:
return repr(obj)
class Node(object):
__slots__ = ()
""" Abstract base class for AST nodes.
"""
def __repr__(self):
""" Generates a python representation of the current node
"""
result = self.__class__.__name__ + '('
indent = ''
separator = ''
for name in self.__slots__[:-2]:
result += separator
result += indent
result += name + '=' + (_repr(getattr(self, name)).replace('\n', '\n ' + (' ' * (len(name) + len(self.__class__.__name__)))))
separator = ','
indent = '\n ' + (' ' * len(self.__class__.__name__))
result += indent + ')'
return result
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)
"""
_method_cache = None
def visit(self, node):
""" Visit a node.
"""
if self._method_cache is None:
self._method_cache = {}
visitor = self._method_cache.get(node.__class__.__name__, None)
if visitor is None:
method = 'visit_' + node.__class__.__name__
visitor = getattr(self, method, self.generic_visit)
self._method_cache[node.__class__.__name__] = visitor
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 in node:
self.visit(c)
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