syntax_data: {"ast_node_type":"other","tokens":[{"end":46,"kind":"keyword","start":0,"text":"match"}]}
source_snippet:         match v.and_then(|s| s.parse().ok()) {
context_before:     pub(crate) fn parse_number<T: Copy + FromStr>(slot: &mut T, v: Option<&str>) -> bool {
context_after:             Some(i) => {