Skip to content

Index access

woke.ast.ir.expression.index_access module #

IndexAccess class #

Bases: ExpressionAbc

TBD

Source code in woke/ast/ir/expression/index_access.py 
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
class IndexAccess(ExpressionAbc):
    """
    TBD
    """

    _ast_node: SolcIndexAccess
    _parent: SolidityAbc  # TODO: make this more specific

    _base_expression: ExpressionAbc
    _index_expression: Optional[ExpressionAbc]

    def __init__(
        self, init: IrInitTuple, index_access: SolcIndexAccess, parent: SolidityAbc
    ):
        super().__init__(init, index_access, parent)
        self._base_expression = ExpressionAbc.from_ast(
            init, index_access.base_expression, self
        )

        if index_access.index_expression is None:
            self._index_expression = None
        else:
            self._index_expression = ExpressionAbc.from_ast(
                init, index_access.index_expression, self
            )

    def __iter__(self) -> Iterator[IrAbc]:
        yield self
        yield from self._base_expression
        if self._index_expression is not None:
            yield from self._index_expression

    @property
    def parent(self) -> SolidityAbc:
        return self._parent

    @property
    def base_expression(self) -> ExpressionAbc:
        return self._base_expression

    @property
    def index_expression(self) -> Optional[ExpressionAbc]:
        return self._index_expression

    @property
    @lru_cache(maxsize=2048)
    def is_ref_to_state_variable(self) -> bool:
        return self.base_expression.is_ref_to_state_variable

    @property
    @lru_cache(maxsize=2048)
    def modifies_state(self) -> Set[Tuple[IrAbc, ModifiesStateFlag]]:
        ret = self.base_expression.modifies_state
        if self.index_expression is not None:
            ret |= self.index_expression.modifies_state
        return ret