syntax_data: {"ast_node_type":"other","tokens":[{"end":65,"kind":"keyword","start":0,"text":"#[derive(Clone,"}]}
source_snippet:     #[derive(Clone, Copy, PartialEq, Eq, PartialOrd, Ord, Debug)]
context_before:     /// values to `CharPos` values as necessary.
context_after:     pub struct CharPos(pub usize);