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1 #!/usr/bin/python
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2
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3 import parser, tokenizer, evaluator
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4
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5 import sys, pickle
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6 sys.setrecursionlimit(65535) # not too big, but hopefully big enough for some stuff
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7
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8
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9 try:
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10 line = raw_input()
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11 except EOFError:
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12 raise SystemExit
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13
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14 # tokenize
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15 try:
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16 tokens = tokenizer.tokenize(line)
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17 except Exception, line:
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18 print "Tokenizer error:", line
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19 raise SystemExit
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20
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21 # Get a pickled environment
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22 try:
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23 env = pickle.load(open('lambda/defs.pickle'))
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24 except:
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25 env = {}
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26
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27 # parse
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28 try:
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29 exp, defs = parser.parse(tokens, env)
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30 except Exception, line:
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31 print "Parser error:", line
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32 raise SystemExit
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33
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34 env.update(defs)
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35
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36 # evaluate
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37
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38 try:
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39 if exp != None:
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40 evaluator.eval(exp, env)
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41 except Exception, line:
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42 print "Run-time error:", line
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43 raise SystemExit
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44
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45 # finally, save the definitions
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46
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47 f = open('lambda/defs.pickle', 'w')
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48 pickle.dump(env, f)
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49
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50
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