| @dataclass |
| class DebugVisitor(Visitor[T]): |
| tree_depth: int = 0 |
| |
| def visit_default(self, node: LN) -> Iterator[T]: |
| indent = ' ' * (2 * self.tree_depth) |
| if isinstance(node, Node): |
| _type = type_repr(node.type) |
| out(f'{indent}{_type}', fg='yellow') |
| self.tree_depth += 1 |
| for child in node.children: |
| yield from self.visit(child) |
| |
| self.tree_depth -= 1 |
| out(f'{indent}/{_type}', fg='yellow', bold=False) |
| else: |
| _type = token.tok_name.get(node.type, str(node.type)) |
| out(f'{indent}{_type}', fg='blue', nl=False) |
| if node.prefix: |
| # We don't have to handle prefixes for `Node` objects since |
| # that delegates to the first child anyway. |
| out(f' {node.prefix!r}', fg='green', bold=False, nl=False) |
| out(f' {node.value!r}', fg='blue', bold=False) |
| |
| @classmethod |
| def show(cls, code: str) -> None: |
| """Pretty-prints a given string of `code`. |
| |
| Convenience method for debugging. |
| """ |
| v: DebugVisitor[None] = DebugVisitor() |
| list(v.visit(lib2to3_parse(code))) |
