#! /usr/bin/env python
# -*- coding: utf-8 -*-
# vim:fenc=utf-8
#
# Copyright © 2019 pavle <pavle.portic@tilda.center>
#
# Distributed under terms of the BSD-3-Clause license.

from lexer import Lexer
from interpreter import Interpreter, InterpreterError
from constants import DEC


def print_stack(interpreter, stack):
	for item in stack:
		if interpreter.mode == DEC:
			if item.is_integer():
				print(int(item))
			else:
				print(round(float(item), 4))
		else:
			print(interpreter.mode_func(item))


def rpncalc():
	interpreter = Interpreter()

	while True:
		try:
			text = input('> ')
		except (EOFError, KeyboardInterrupt):
			break

		if not text:
			continue

		if text == 'exit':
			break

		lexer = Lexer(text)
		try:
			stack = interpreter.parse(lexer)
		except InterpreterError as err:
			print(err)

		print_stack(interpreter, stack)


if __name__ == "__main__":
	rpncalc()