syntax_data: {"ast_node_type":"other","tokens":[{"end":44,"kind":"keyword","start":0,"text":"#[derive(Copy,"}]}
source_snippet: #[derive(Copy, Clone, PartialEq, Eq, Debug)]
context_before: /// Range inside of a `Span` used for diagnostics when we only have access to relative positions.
context_after: pub struct InnerSpan {