56 lines
1.3 KiB
Python
56 lines
1.3 KiB
Python
from dataclasses import dataclass
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from enum import auto, Enum
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from typing import Any
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import re
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class Datatype(Enum):
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NONE = auto()
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NULL = auto()
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COMMENT = auto()
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STRING = auto()
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INTEGER = auto()
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FLOAT = auto()
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COMPLEX = auto()
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@dataclass
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class Data:
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type: Datatype
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value: Any
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@dataclass
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class Variable:
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name: str
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type: Datatype
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value: Data
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def __setattr__(self, name, value):
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if name == "value" and isinstance(value, Data):
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if self.type == value.type:
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object.__setattr__(self, name, value)
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else:
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raise ValueError(
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"Type inequality; cannot assign value of "
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f"type {value.type} to variable of type {self.type}"
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)
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else:
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object.__setattr__(self, name, value)
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NONE_TYPE = Variable(None, Datatype.NONE, None)
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STR_MATCH_BEGIN = re.compile(r"^\"")
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STR_MATCH_END = re.compile(r"\"$")
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VAR_ASSIGN_TOKEN = re.compile(r"[A-Za-z]+ ?= ?")
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VAR_MATCH = {
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re.compile(r"null"): Datatype.NULL,
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re.compile(r"\/\/.+"): Datatype.COMMENT,
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re.compile(r"\".+\""): Datatype.STRING,
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re.compile(r"-?\d+\.?\d{0,}?\+\d+\.?\d{0,}?i"): Datatype.COMPLEX,
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re.compile(r"-?\d+\.\d{0,}"): Datatype.FLOAT,
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re.compile(r"-?\d+"): Datatype.INTEGER,
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}
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