def evaluate(self, static, dynamic, local):
name = self.name
expr_value = self.expr.evaluate(static, dynamic, local)
condition = self.condition
if self.type == "some": # Existential quantification
for value in expr_value:
new_local = local.new(set_name=name, set_value=d.StandardSequence([value]))
if utils.boolean(condition.evaluate(static, dynamic, new_local)):
return utils.create_boolean(True)
return utils.create_boolean(False)
elif self.type == "every": # Universal quantification
for value in expr_value:
new_local = local.new(set_name=name, set_value=d.StandardSequence([value]))
if not utils.boolean(condition.evaluate(static, dynamic, new_local)):
return utils.create_boolean(False)
return utils.create_boolean(True)
else:
raise Exception("Invalid quantification type: " + self.type)
def last(dynamic):
return utils.create_boolean(dynamic.context_position == dynamic.context_size)
def first(dynamic):
return utils.create_boolean(dynamic.context_position == 1)
def position(dynamic, check=None):
if check is None:
return utils.create_number(dynamic.context_position)
return utils.create_boolean(
utils.get_single_instance(check, d.Number).get_as_int() == dynamic.context_position)
def evaluate(self, static, dynamic, local):
left = self.left.evaluate(static, dynamic, local)
if utils.boolean(left):
return utils.create_boolean(True)
return utils.create_boolean(utils.boolean(self.right.evaluate(static, dynamic, local)))