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from dataclasses import dataclass
from enum import Enum, auto
from typing import TypeVar, List
T = TypeVar("T", int, float, str, bool)
# classes
class NebType(Enum):
ANY = auto()
INT = auto()
FLOAT = auto()
NUMBER = auto()
STRING = auto()
BOOL = auto()
EXPR = auto()
SYMBOL = auto()
def __str__(self):
return ":" + self.name.lower()
@dataclass
class NebToken:
type_: NebType
class NebLiteral(NebToken):
def __init__(self, type_, value):
super().__init__(type_)
self.value = value
def __str__(self):
fixed = str(self.value)
if self.type_ == NebType.BOOL:
fixed = f"#{str(self.value).lower()}"
elif self.type_ == NebType.STRING:
fixed = f'"{self.value}"'
return f"{fixed} <{self.type_}>"
class NebSeparator():
pass
class NebOpen(NebSeparator):
def __str__(self):
return "("
class NebClose(NebSeparator):
def __str__(self):
return ")"
class NebSymbol(NebToken):
def __init__(self, name):
super().__init__(NebType.SYMBOL)
self.name = name
def __str__(self):
return f"'{self.name}"
class NebExpression(NebToken):
def __init__(self, symbol, args):
super().__init__(NebType.EXPR)
self.symbol = symbol
self.args = args
self.returns = None
def set_returns(self, returns):
self.returns = returns
def __str__(self):
out = f"({self.symbol}"
for arg in self.args:
out += f" {arg}"
out += f") <{self.type_}> -> <{self.out_sig()}>"
return out
def in_sig(self):
return " ".join(f":{arg.type_.name.lower()}" for arg in self.args)
def out_sig(self):
if self.returns is None:
return "?"
else:
return ":" + self.returns.lower()
def sig(self):
return (self.in_sig() + " > " + self.out_sig()).strip()
class NebFunction():
def __init__(self, name, args, returns):
self.name = name
self.args = args
self.returns = returns
def in_sig(self):
return " ".join(":" + x.name.lower() for x in self.args)
def out_sig(self):
return ":" + self.returns.lower()
def sig(self):
return (self.in_sig() + " > " + self.out_sig()).strip()
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