syntax_data: {"ast_node_type":"other","tokens":[{"end":84,"kind":"keyword","start":0,"text":"Rvalue::BinaryOp(BinOp::Sub,"}]}
source_snippet:             Rvalue::BinaryOp(BinOp::Sub, Box::new((Operand::Copy(alignment), one))),
context_before:             alignment_mask,
context_after:         ))),