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from collections import namedtuple
from c_analyzer.common.info import ID
from c_analyzer.common.util import classonly, _NTBase
class Symbol(_NTBase, namedtuple('Symbol', 'id kind external')):
"""Info for a single compilation symbol."""
__slots__ = ()
class KIND:
VARIABLE = 'variable'
FUNCTION = 'function'
OTHER = 'other'
@classonly
def from_name(cls, name, filename=None, kind=KIND.VARIABLE, external=None):
"""Return a new symbol based on the given name."""
id = ID(filename, None, name)
return cls(id, kind, external)
def __new__(cls, id, kind=KIND.VARIABLE, external=None):
self = super().__new__(
cls,
id=ID.from_raw(id),
kind=str(kind) if kind else None,
external=bool(external) if external is not None else None,
)
return self
def __hash__(self):
return hash(self.id)
def __getattr__(self, name):
return getattr(self.id, name)
def validate(self):
"""Fail if the object is invalid (i.e. init with bad data)."""
if not self.id:
raise TypeError('missing id')
else:
self.id.validate()
if not self.kind:
raise TypeError('missing kind')
elif self.kind not in vars(self.KIND).values():
raise ValueError(f'unsupported kind {self.kind}')
if self.external is None:
raise TypeError('missing external')
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