syntax_data: {"ast_node_type":"variable","tokens":[{"end":70,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:                 let var = self.parse_integer_literal(args[1])? as u32;
context_before:                 let place = self.parse_place(args[0])?;
context_after:                 Ok(StatementKind::SetDiscriminant {