def _compile_call(self, text, attribute_handlers=None):
import compiler
import types
from compiler import ast, misc, pycodegen
raise NotImplementedError('Incomplete')
# TODO Make this work?
def _generate(node):
if node.type == node.TERM:
return ast.Compare(ast.Const(node.value),
[('in', ast.Name('text'))])
elif node.type == node.AND:
return ast.And([_generate(node.left), _generate(node.right)])
elif node.type == node.OR:
return ast.Or([_generate(node.left), _generate(node.right)])
elif node.type == node.NOT:
return ast.Not(_generate(node.left))
elif node.type == node.ATTR:
raise NotImplementedError
qast = ast.Expression(
ast.Lambda(['self', 'text', 'attribute_handlers'],
[ast.Name('None')], 0, _generate(self)))
misc.set_filename('<%s compiled query>' % self.__class__.__name__,
qast)
gen = pycodegen.ExpressionCodeGenerator(qast)
self.__call__ = types.MethodType(eval(gen.getCode()), self, Query)
return self.__call__(text)
def eval(self, frame):
# fall-back for unknown expression nodes
try:
expr = ast.Expression(self.__obj__)
expr.filename = '<eval>'
self.__obj__.filename = '<eval>'
co = pycodegen.ExpressionCodeGenerator(expr).getCode()
result = frame.eval(co)
except passthroughex:
raise
except:
raise Failure(self)
self.result = result
self.explanation = self.explanation or frame.repr(self.result)
