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  1. '''
  2. This is an interpreter for the Pancake Stack esolang. To use it, paste your program into the
  3. stdin, followed by any number of ~s on one line. Regular stdin is after the ~s.
  4. '''
  5. import re
  6. import sys
  7.  
  8. def push(match):
  9.     global stack
  10.     stack.append(len(match.group(1)))
  11. def eat():
  12.     global stack
  13.     stack.pop()
  14. def combine_pancakes():
  15.     global stack
  16.     a, b = stack.pop(), stack.pop()
  17.     stack.append(a + b)
  18. def give_pancake():
  19.     global stack
  20.     stack.append(int(input()))
  21. def give_hotcake():
  22.     global stack
  23.     stack.append(ord(sys.stdin.read(1)))
  24. def show_pancake():
  25.     global stack
  26.     print(chr(stack[-1]), end='')
  27. def take_from_pancakes():
  28.     global stack
  29.     a, b = stack.pop(), stack.pop()
  30.     stack.append(a - b)
  31. def flip_pancakes():
  32.     global stack
  33.     stack[-1], stack[-2] = stack[-2], stack[-1]
  34. def put_another_pancake():
  35.     global stack
  36.     stack.append(stack[-1])
  37. def label(match):
  38.     global labels
  39.     global stack
  40.     label = match.group(1)
  41.     if label in labels:
  42.         return
  43.     labels[label] = stack[-1] - 1
  44. def not_tasty(match):
  45.     global labels
  46.     global stack
  47.     global line
  48.     if not stack[-1]:
  49.         line = labels[match.group(1)]
  50. def is_tasty():
  51.     global labels
  52.     global stack
  53.     global line
  54.     if stack[-1]:
  55.         line = labels[match.group(1)]
  56. def put_syrup():
  57.     global stack
  58.     for i in range(len(stack)): stack[i] += 1
  59. def put_butter():
  60.     global stack
  61.     stack[-1] += 1
  62. def remove_syrup():
  63.     global stack
  64.     for i in range(len(stack)): stack[i] -= 1
  65. def remove_butter():
  66.     global stack
  67.     stack[-1] -= 1
  68. def eat_all():
  69.     global stack
  70.     sys.exit(0)
  71.  
  72. program = []
  73. line = input()
  74. while '~' not in line:
  75.     program.append(line)
  76.     line = input()
  77.  
  78. commands = {
  79.     r'Put this ([^ ]*?) pancake on top!': push,
  80.     r'Eat the pancake on top!': eat,
  81.     r'Put the top pancakes together!': combine_pancakes,
  82.     r'Give me a pancake!': give_pancake,
  83.     r'How about a hotcake?': give_hotcake,
  84.     r'Show me a pancake!': show_pancake,
  85.     r'Take from the top pancakes!': take_from_pancakes,
  86.     r'Flip the pancakes on top!': flip_pancakes,
  87.     r'Put another pancake on top!': put_another_pancake,
  88.     r'\[(.*)\]': label,
  89.     r'If the pancake isn\'t tasty, go over to "(.*)".': not_tasty,
  90.     r'If the pancake is tasty, go over to "(.*)".': is_tasty,
  91.     r'Put syrup on the pancakes!': put_syrup,
  92.     r'Put butter on the pancakes': put_butter,
  93.     r'Take off the syrup!': remove_syrup,
  94.     r'Take off the butter!': remove_butter,
  95.     r'Eat all of the pancakes!': eat_all
  96. }
  97. labels = dict()
  98. line = 0
  99. stack = []
  100. while program[line] != 'Eat all of the pancakes!':
  101.     #print("%i:%s:%s"%(line,program[line],stack)) #for debug purposes
  102.     for command in commands.keys():
  103.         match = re.match(command, program[line])
  104.         if match:
  105.             try: commands[command](match)
  106.             except TypeError: commands[command]()
  107.             break
  108.     else:
  109.         print('Line %i is not a valid command'%line, file=sys.stderr)
  110.         sys.exit(1)
  111.     line += 1
Runtime error #stdin #stdout #stderr 0.11s 10088KB
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stdin
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Standard input is empty
stdout
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Standard output is empty
stderr
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Traceback (most recent call last):
  File "./prog.py", line 73, in <module>
EOFError: EOF when reading a line
https://ideone.com/7sFFo0
language:
Python 3 (python  3.9.5)
created:
10 years ago
visibility:
public

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