C///

\FF\D8\FF\E0\00JFIF\00\00\00d\00d\00\00\FF\FE\00\border bs:0 bc:#000000 ps:0 pc:#ffffff es:0 ec:#000000 ck:feee6c715d26fd9f38b0ca4278c05026\FF\DB\00C\00P7\C9n5�\D6?\BD�\9Ds\EBp\9F[`8m\B7)o\B5\E8\E6I\99\FE3]]A2\BA\8Cw\D6E\93\\DEv\C8\009\F2\F1NI?uc\\F5\EA\96k\xN<~buv\EA\C8\D7 \8B\84\CEcxI\BBg\AE\9E=\D6+n\EC\80\C8A\8C\AE\EB\CF\D5\DA\E9"2\A4\B9j5\EB\F3W\B63\96\B30Yu\DA\FC8\ED\DF\E7Ms\FB\F1\8E\B3\FA\EA\E8\E6(\883zs\F2_\8DFk\8Bh \00\8C\DCw\D3R\B5+6X\BA\B2\C4j\AB0\B4\FCMw\C2I\8E\9B\E3\A9~9u\FA\D3l\80\C8%p\EE\FDn2� \00$\FEj\C4e\A9\DB\~\95\A7\A5\80EK\BB\8DDsP\00@@AD'k\CF\E8\DB\D2(\80\9AK\D3\85\D6lb\F2\BA\8C*\80\00)\95 59\A3R:\F3\CE"\B6\80\88\00\00i1u4�\E9\F2�\A6\A2\FACM\93WMb*\E0*\00\00\00\00\00(\A8\80\00\00\80\00\00\00\00\00\00\00\00\00\FF\D9 C/// """API for traversing the AST nodes. Implemented by the compiler and meta introspection. """ import typing as t from .nodes import Node if t.TYPE_CHECKING: import typing_extensions as te class VisitCallable(te.Protocol): def __call__(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any: ... class NodeVisitor: """Walks the abstract syntax tree and call visitor functions for every node found. The visitor functions may return values which will be forwarded by the `visit` method. Per default the visitor functions for the nodes are ``'visit_'`` + class name of the node. So a `TryFinally` node visit function would be `visit_TryFinally`. This behavior can be changed by overriding the `get_visitor` function. If no visitor function exists for a node (return value `None`) the `generic_visit` visitor is used instead. """ def get_visitor(self, node: Node) -> "t.Optional[VisitCallable]": """Return the visitor function for this node or `None` if no visitor exists for this node. In that case the generic visit function is used instead. """ return getattr(self, f"visit_{type(node).__name__}", None) # type: ignore def visit(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any: """Visit a node.""" f = self.get_visitor(node) if f is not None: return f(node, *args, **kwargs) return self.generic_visit(node, *args, **kwargs) def generic_visit(self, node: Node, *args: t.Any, **kwargs: t.Any) -> t.Any: """Called if no explicit visitor function exists for a node.""" for node in node.iter_child_nodes(): self.visit(node, *args, **kwargs) class NodeTransformer(NodeVisitor): """Walks the abstrac