def main():
"Starts the main REPL loop"
print "Hello!"
while True:
# read
try:
i = raw_input(">>> ")
if i == "":
continue
if i == "DEBUG":
# activate debug mode
lisp_interpreter.debug = True
continue
while i.count("(") > i.count(")"):
i += raw_input("... ")
except (EOFError, KeyboardInterrupt):
break
if lisp_interpreter.debug:
print "<<< ", i
# eval
t = tree_parse.createTree(i).toList()
l = lisp_interpreter.LispStatement(t)
r = l.evaluate()
# print
print r
# loop ... (while)
print "\nBye!"
def testIntegerStatement(self):
statement = '2'
result = lisp_interpreter.LispStatement(
tree_parse.createTree(statement).toList()).evaluate()
expected = 2
self.assertEqual(expected, result)
def testIntLiteral(self):
t = tree_parse.createTree("2").toList()
self.assertEqual(2, t)
def testSimpleExpression(self):
t = tree_parse.createTree("(- 2 3)").toList()
self.assertEqual(['-', 2, 3], t)
def testComplexExpression(self):
t = tree_parse.createTree("(+ (- 2 3) (a))").toList()
self.assertEqual(['+', ['-', 2, 3], ['a']], t)
def testArithmeticStatement(self):
statement = '(+ 2 2)'
result = lisp_interpreter.LispStatement(
tree_parse.createTree(statement).toList()).evaluate()
expected = 4
self.assertEqual(expected, result)