####################################################
# parser test code
####################################################

def test(ParserClass, msg):
    print msg, ParserClass
    x = ParserClass('4 / 2 + 3')            # allow different Parser's
    x.parse()

    x.parse('3 + 4 / 2')                    # like eval('3 + 4 / 2')...
    x.parse('(3 + 4) / 2')
    x.parse('4 / (2 + 3)')
    x.parse('4.0 / (2 + 3)')
    x.parse('4 / (2.0 + 3)')
    x.parse('4.0 / 2 * 3')
    x.parse('(4.0 / 2) * 3')
    x.parse('4.0 / (2 * 3)')
    x.parse('(((3))) + 1')

    y = ParserClass()
    y.parse('set a 4 / 2 + 1')
    y.parse('a * 3')
    y.parse('set b 12 / a')
    y.parse('b') 

    z = ParserClass()
    z.parse('set a 99')
    z.parse('set a a + 1')
    z.parse('a')

    z = ParserClass()
    z.parse('pi')
    z.parse('2 * pi')
    z.parse('1.234 + 2.1')

def interact(ParserClass):                     # command-line entry
    print ParserClass
    x = ParserClass()
    while 1:
        cmd = raw_input('Enter=> ')
        if cmd == 'stop':
            break
        x.parse(cmd)