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from dataclasses import dataclass
from enum import Enum, auto
from typing import Any
# tokens and types
# NOTE: this can probably be simplified
class TokenType(Enum):
PRINT = auto()
OPEN_PAREN = auto()
CLOSE_PAREN = auto()
EOF = auto()
# literals
INT = auto()
FLOAT = auto()
STRING = auto()
TRUE = auto()
FALSE = auto()
# arithmetic
PLUS = auto()
DASH = auto()
STAR = auto()
SLASH = auto()
# strings
DOUBLE_QUOTE = auto()
# comparison
GREATER = auto()
GREATER_EQUAL = auto()
LESS = auto()
LESS_EQUAL = auto()
EQUAL = auto()
NOT = auto()
AND = auto()
OR = auto()
# flow
IF = auto()
FOR_COUNT = auto()
PIPE = auto()
# keywords
DEF = auto()
LAMBDA = auto()
# symbols
SYMBOL = auto()
# types
INT_TYPE = auto()
FLOAT_TYPE = auto()
STRING_TYPE = auto()
ANY_TYPE = auto()
LIST_TYPE = auto()
class TypeEnum(Enum):
ANY = auto()
STRING = auto()
INT = auto()
FLOAT = auto()
NUMBER = auto()
LIST = auto()
LITERAL = auto()
BOOL = auto()
def __str__(self):
return f":{self.name.lower()}"
TYPE_HIERARCHY = { TypeEnum.ANY: None,
TypeEnum.LITERAL: TypeEnum.ANY,
TypeEnum.LIST: TypeEnum.ANY,
TypeEnum.STRING: TypeEnum.LITERAL,
TypeEnum.BOOL: TypeEnum.LITERAL,
TypeEnum.NUMBER: TypeEnum.LITERAL,
TypeEnum.INT: TypeEnum.NUMBER,
TypeEnum.FLOAT: TypeEnum.NUMBER }
def is_subtype_of(candidate, expected):
if candidate == expected:
return True
parent = TYPE_HIERARCHY[candidate]
while parent is not None:
if parent == expected:
return True
parent = TYPE_HIERARCHY[parent]
return False
@dataclass
class Token:
type_: TokenType
text: str
value: Any
line: int
def __str__(self):
return f"{self.type_.name} {self.text} {self.line}"
class Literal:
def __init__(self, value, type_=None):
self.value = value
if type_ is None:
self.type_ = TypeEnum.ANY
else:
self.type_ = type_
def __str__(self):
return f"{self.value}:literal"
class Int(Literal):
def __init__(self, value):
super().__init__(value, TypeEnum.INT)
def __str__(self):
return f"{self.value}"
class Float(Literal):
def __init__(self, value):
super().__init__(value, TypeEnum.FLOAT)
def __str__(self):
return f"{self.value}"
class Bool(Literal):
def __init__(self, value):
super().__init__(value, TypeEnum.BOOL)
def __str__(self):
return f"#{str(self.value).lower()}"
class String(Literal):
def __init__(self, value):
super().__init__(value, TypeEnum.STRING)
def __str__(self):
return f'"{repr(self.value)[1:-1]}"'
class Type:
def __init__(self, name):
self.name = name
def __str__(self):
return self.name
class Symbol:
def __init__(self, name, line):
self.name = name
self.line = line
def __str__(self):
return f"'{self.name}"
class List:
def __init__(self, args, data=False):
self.args = args
self.data = data
self.type_ = TypeEnum.LIST
def __str__(self):
return "(" + " ".join(f"{arg}" for arg in self.args) + ")"
class TypedList(List):
def __init__(self, args, data=True, type_=Type("string")):
super().__init__(args, data)
self.type_ = type_
def __str__(self):
return super().__str__() + f"{self.type_}"
class Strings(TypedList):
def __init__(self, args, data=True):
super().__init__(args, data, Type(":string"))
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