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# sly/ast.py
import sys
class AST(object):
@classmethod
def __init_subclass__(cls, **kwargs):
mod = sys.modules[cls.__module__]
if not hasattr(cls, '__annotations__'):
return
hints = list(cls.__annotations__.items())
def __init__(self, *args, **kwargs):
if len(hints) != len(args):
raise TypeError(f'Expected {len(hints)} arguments')
for arg, (name, val) in zip(args, hints):
if isinstance(val, str):
val = getattr(mod, val)
if not isinstance(arg, val):
raise TypeError(f'{name} argument must be {val}')
setattr(self, name, arg)
cls.__init__ = __init__
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