syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"Ok(Rvalue::Cast(CastKind::Transmute,"}]}
source_snippet:                 Ok(Rvalue::Cast(CastKind::Transmute, source, expr.ty))
context_before:                 let source = self.parse_operand(args[0])?;
context_after:             },