syntax_data: {"ast_node_type":"other","tokens":[{"end":40,"kind":"keyword","start":0,"text":"ty::ExprKind::Binop(op)"}]}
source_snippet:             ty::ExprKind::Binop(op) => {
context_before:         match expr.kind {
context_after:                 let (_, _, c1, c2) = expr.binop_args();