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from dataclasses import dataclass
from enum import Enum, auto
from typing import Any
from .typeclass import TypeEnum
from .exceptions import NebPanic
#from . import Function
# tokens and types
# NOTE: this can probably be simplified
class TokenType(Enum):
OPEN_PAREN = auto()
CLOSE_PAREN = auto()
OPEN_BRACKET = auto()
CLOSE_BRACKET = auto()
EOF = auto()
# literals
INT = auto()
FLOAT = auto()
STRING = auto()
TRUE = auto()
FALSE = auto()
# keywords
IF = auto()
FOR_COUNT = auto()
DEF = auto()
LAMBDA = auto()
FUNC = auto()
# symbols
SYMBOL = auto()
# types
INT_TYPE = auto()
FLOAT_TYPE = auto()
NUMBER_TYPE = auto()
STRING_TYPE = auto()
ANY_TYPE = auto()
LIST_TYPE = auto()
LITERAL_TYPE = auto()
BOOL_TYPE = auto()
USER_TYPE = auto()
MANY = auto()
COLON = auto()
@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
self.type_ = TypeEnum.ANY # TODO no it's not
def __str__(self):
return f"{self.name}"
class Expr:
def __init__(self, args):
self.args = args
self.type_ = TypeEnum.ANY # TODO no it's not
def __str__(self):
return "(" + " ".join(f"{arg}" for arg in self.args) + ")"
class List:
def __init__(self, args):
self.args = args
self.type_ = TypeEnum.LIST
def __str__(self):
return "(" + " ".join(f"{arg}" for arg in self.args) + ")"
# function things
class Arg:
def __init__(self, name, type_, *, optional=False, lazy=False):
self.name = name
self.type_ = type_
self.optional = optional
self.lazy = lazy
def __str__(self):
return f"{self.name} {self.type_}"
def string_args(args, many):
out = [f"{arg}" for arg in args]
if many is not None:
many_dup = Arg("&", many.type_)
out.append(f"{many_dup}")
return " ".join(out).strip()
class Environment:
def __init__(self, parent=None):
self.parent = parent
self.environment = {}
def register(self, key, value):
self.environment[key] = value
def reregister(self, key, value):
if not self.contains(key):
raise NebPanic(f"undefined symbol: '{key}")
if key in self.environment:
self.register(key, value)
else:
self.parent.reregister(key, value)
def contains(self, key):
if key in self.environment:
return True
elif self.parent is not None:
return self.parent.contains(key)
else:
return False
def get(self, key):
try:
return self.environment[key]
except:
pass
try:
return self.parent.get(key)
except:
raise NebPanic(f"undefined symbol: '{key}")
def __str__(self):
out = ""
for k, v in self.environment.items():
out += f"{k}: {v}, "
return out
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