def parse(self):
instructions = self._program()
# do not print any output if error occurs
if self.total_error_flag == 0:
if self.print_symbol_table == 0:
self.observer.print_output()
elif self.print_symbol_table == 1:
self.visitor.visitScope(self.program_scope)
self.visitor.end()
elif self.print_symbol_table == 2:
currinstruction = instructions
self.visitor.start()
# while(currinstruction is not None):
currinstruction.visit(self.visitor)
# currinstruction = currinstruction._next
elif self.print_symbol_table == 3:
environment = self.program_scope.make_environment()
stack = []
currinstruction = instructions
#while curr is not None:
# self.interpret(curr, environment, stack)
# curr = curr._next
#v = InterpreterVisitor(environment)
#v.start()
#currinstruction.int_visit(v)
v = Interpreter(currinstruction, environment)
v.start()
elif self.print_symbol_table == 4:
#environment = self.program_scope.make_code_generator_environment()
#print environment
self.program_scope.make_code_generator_environment()
c = CodeGenerator(self.program_scope, 0, instructions)
c.start()
c.cgoutput()
elif self.print_symbol_table == 5:
self.program_scope.make_code_generator_environment()
c = CodeGenerator(self.program_scope, 1, instructions, filename=self.filename+".s")
c.start()
c.cgoutput()
