45 lines
1.2 KiB
Python
45 lines
1.2 KiB
Python
class SymbolTable:
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def __init__(self):
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"""
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Initialize dictionary with predefined Hack platform symbols
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"""
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self.symbols = {
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"SP": 0,
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"LCL": 1,
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"ARG": 2,
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"THIS": 3,
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"THAT": 4,
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"R0": 0,
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"R1": 1,
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"R2": 2,
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"R3": 3,
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"R4": 4,
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"R5": 5,
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"R6": 6,
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"R7": 7,
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"R8": 8,
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"R9": 9,
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"R10": 10,
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"R11": 11,
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"R12": 12,
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"R13": 13,
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"R14": 14,
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"R15": 15,
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"SCREEN": 16384,
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"KBD": 24576,
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}
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def add_entry(self, symbol: str, address: int) -> None:
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# Add symbol-address pair to dictionary
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self.symbols[symbol] = address
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def contains(self, symbol: str) -> bool:
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print(symbol)
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raise NotImplementedError("contains not yet implemented")
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# Check if symbol exists in dictionary
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def get_address(self, symbol: str) -> int:
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print(symbol)
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raise NotImplementedError("get_address not yet implemented")
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# Return address for symbol (raises KeyError if not found)
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