syntax_data: {"ast_node_type":"other","tokens":[{"end":77,"kind":"keyword","start":0,"text":"Box::new((Operand::Copy(Place::from(index)),"}]}
source_snippet:                 Box::new((Operand::Copy(Place::from(index)), len.to_copy())),
context_before:                 BinOp::Lt,
context_after:             ),