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slightly better example link (#2617)
[etc/vim.git] / tests / data / debug_visitor.py
1 @dataclass
2 class DebugVisitor(Visitor[T]):
3     tree_depth: int = 0
4
5     def visit_default(self, node: LN) -> Iterator[T]:
6         indent = ' ' * (2 * self.tree_depth)
7         if isinstance(node, Node):
8             _type = type_repr(node.type)
9             out(f'{indent}{_type}', fg='yellow')
10             self.tree_depth += 1
11             for child in node.children:
12                 yield from self.visit(child)
13
14             self.tree_depth -= 1
15             out(f'{indent}/{_type}', fg='yellow', bold=False)
16         else:
17             _type = token.tok_name.get(node.type, str(node.type))
18             out(f'{indent}{_type}', fg='blue', nl=False)
19             if node.prefix:
20                 # We don't have to handle prefixes for `Node` objects since
21                 # that delegates to the first child anyway.
22                 out(f' {node.prefix!r}', fg='green', bold=False, nl=False)
23             out(f' {node.value!r}', fg='blue', bold=False)
24
25     @classmethod
26     def show(cls, code: str) -> None:
27         """Pretty-prints a given string of `code`.
28
29         Convenience method for debugging.
30         """
31         v: DebugVisitor[None] = DebugVisitor()
32         list(v.visit(lib2to3_parse(code)))