syntax_data: {"ast_node_type":"variable","tokens":[{"end":98,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:         let kind = PatKind::ExpandedConstant { subpattern: inlined_const_as_pat, def_id: uv.def };
context_before:         // constant. This is used for diagnostics, and for unsafety checking of inline const blocks.
context_after:         Box::new(Pat { kind, ty, span: self.span })