C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// #----------------------------------------------------------------- # _ast_gen.py # # Generates the AST Node classes from a specification given in # a configuration file # # The design of this module was inspired by astgen.py from the # Python 2.5 code-base. # # Eli Bendersky [https://eli.thegreenplace.net/] # License: BSD #----------------------------------------------------------------- from string import Template class ASTCodeGenerator(object): def __init__(self, cfg_filename='_c_ast.cfg'): """ Initialize the code generator from a configuration file. """ self.cfg_filename = cfg_filename self.node_cfg = [NodeCfg(name, contents) for (name, contents) in self.parse_cfgfile(cfg_filename)] def generate(self, file=None): """ Generates the code into file, an open file buffer. """ src = Template(_PROLOGUE_COMMENT).substitute( cfg_filename=self.cfg_filename) src += _PROLOGUE_CODE for node_cfg in self.node_cfg: src += node_cfg.generate_source() + '\n\n' file.write(src) def parse_cfgfile(self, filename): """ Parse the configuration file and yield pairs of (name, contents) for each node. """ with open(filename, "r") as f: for line in f: line = line.strip() if not line or line.startswith('#'): continue colon_i = line.find(':') lbracket_i = line.find('[') rbracket_i = line.find(']') if colon_i < 1 or lbracket_i <= colon_i or rbracket_i <= lbracket_i: raise RuntimeError("Invalid line in %s:\n%s\n" % (filename, line)) name = line[:colon_i] val = line[lbracket_i + 1:rbracket_i] vallist = [v.strip() for v in val.split(',')] if val else [] yield name, vallist class NodeCfg(object): """ 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. """ def __init__(self, name, contents): self.name = name self.all_entries = [] self.attr = [] self.child = [] self.seq_child = [] for entry in contents: clean_entry = entry.rstrip('*') self.all_entries.append(clean_entry) if entry.endswith('**'): self.seq_child.append(clean_entry) elif entry.endswith('*'): self.child.append(clean_entry) else: self.attr.append(entry) def generate_source(self): src = self._gen_init() src += '\n' + self._gen_children() src += '\n' + self._gen_iter() src += '\n' + self._gen_attr_names() return src def _gen_init(self): src = "class %s(Node):\n" % self.name if self.all_entries: args = ', '.join(self.all_entries) slots = ', '.join("'{0}'".format(e) for e in self.all_entries) slots += ", 'coord', '__weakref__'" arglist = '(self, %s, coord=None)' % args else: slots = "'coord', '__weakref__'" arglist = '(self, coord=None)' src += " __slots__ = (%s)\n" % slots src += " def __init__%s:\n" % arglist for name in self.all_entries + ['coord']: src += " self.%s = %s\n" % (name, name) return src def _gen_children(self): src = ' def children(self):\n' if self.all_entries: src += ' nodelist = []\n' for child in self.child: src += ( ' if self.%(child)s is not None:' + ' nodelist.append(("%(child)s", self.%(child)s))\n') % ( dict(child=child)) for seq_child in self.seq_child: src += ( ' for i, child in enumerate(self.%(child)s or []):\n' ' nodelist.append(("%(child)s[%%d]" %% i, child))\n') % ( dict(child=seq_child)) src += ' return tuple(nodelist)\n' else: src += ' return ()\n' return src def _gen_iter(self): src = ' def __iter__(self):\n' if self.all_entries: for child in self.child: src += ( ' if self.%(child)s is not None:\n' + ' yield self.%(child)s\n') % (dict(child=child)) for seq_child in self.seq_child: src += ( ' for child in (self.%(child)s or []):\n' ' yield child\n') % (dict(child=seq_child)) if not (self.child or self.seq_child): # Empty generator src += ( ' return\n' + ' yield\n') else: # Empty generator src += ( ' return\n' + ' yield\n') return src def _gen_attr_names(self): src = " attr_names = (" + ''.join("%r, " % nm for nm in self.attr) + ')' return src _PROLOGUE_COMMENT = \ r'''#----------------------------------------------------------------- # ** 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 #----------------------------------------------------------------- ''' _PROLOGUE_CODE = r''' 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