Skip to content

Index range access

woke.ast.ir.expression.index_range_access module #

IndexRangeAccess class #

Bases: ExpressionAbc

TBD

Source code in woke/ast/ir/expression/index_range_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
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
class IndexRangeAccess(ExpressionAbc):
    """
    TBD
    """

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

    _base_expression: ExpressionAbc
    _start_expression: Optional[ExpressionAbc]
    _end_expression: Optional[ExpressionAbc]

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

        if index_range_access.start_expression is None:
            self._start_expression = None
        else:
            self._start_expression = ExpressionAbc.from_ast(
                init, index_range_access.start_expression, self
            )

        if index_range_access.end_expression is None:
            self._end_expression = None
        else:
            self._end_expression = ExpressionAbc.from_ast(
                init, index_range_access.end_expression, self
            )

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

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

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

    @property
    def start_expression(self) -> Optional[ExpressionAbc]:
        return self._start_expression

    @property
    def end_expression(self) -> Optional[ExpressionAbc]:
        return self._end_expression

    @property
    def is_ref_to_state_variable(self) -> bool:
        # index range access in only supported for dynamic calldata arrays
        return False

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