Struct definition

woke.ast.ir.declaration.struct_definition module

StructDefinition class

Bases: DeclarationAbc

Definition of a struct.

Example

struct S {
    uint a;
    uint b;
}

Source code in woke/ast/ir/declaration/struct_definition.py

class StructDefinition(DeclarationAbc):
    """
    Definition of a struct.

    !!! example
        ```solidity
        struct S {
            uint a;
            uint b;
        }
        ```
    """

    _ast_node: SolcStructDefinition
    _parent: Union[ContractDefinition, SourceUnit]

    _canonical_name: str
    _members: List[VariableDeclaration]
    _visibility: Visibility

    def __init__(
        self,
        init: IrInitTuple,
        struct_definition: SolcStructDefinition,
        parent: SolidityAbc,
    ):
        super().__init__(init, struct_definition, parent)
        self._canonical_name = struct_definition.canonical_name
        # TODO scope
        self._visibility = struct_definition.visibility

        self._members = []
        for member in struct_definition.members:
            self._members.append(VariableDeclaration(init, member, self))

    def __iter__(self) -> Iterator[IrAbc]:
        yield self
        for member in self._members:
            yield from member

    def _parse_name_location(self) -> Tuple[int, int]:
        IDENTIFIER = r"[a-zA-Z$_][a-zA-Z0-9$_]*"
        STRUCT_RE = re.compile(
            r"^\s*struct\s+(?P<name>{identifier})".format(identifier=IDENTIFIER).encode(
                "utf-8"
            )
        )

        byte_start = self._ast_node.src.byte_offset
        match = STRUCT_RE.match(self._source)
        assert match
        return byte_start + match.start("name"), byte_start + match.end("name")

    @property
    def parent(self) -> Union[ContractDefinition, SourceUnit]:
        """
        Returns:
            Parent IR node.
        """
        return self._parent

    @property
    def canonical_name(self) -> str:
        return self._canonical_name

    @property
    @lru_cache(maxsize=2048)
    def declaration_string(self) -> str:
        return (
            f"struct {self.name}"
            + " {\n"
            + ";\n".join(f"    {member.declaration_string}" for member in self._members)
            + ";\n}"
        )

    @property
    def members(self) -> Tuple[VariableDeclaration]:
        """
        Returns:
            Tuple of member variable declarations.
        """
        return tuple(self._members)

members: Tuple[VariableDeclaration] property

Returns:

Type	Description
Tuple[VariableDeclaration]	Tuple of member variable declarations.

parent: Union[ContractDefinition, SourceUnit] property

Returns:

Type	Description
Union[ContractDefinition, SourceUnit]	Parent IR node.