syntax_data: {"ast_node_type":"other","tokens":[{"end":36,"kind":"keyword","start":0,"text":"ExprKind::Binary"}]}
source_snippet:         ExprKind::Binary { .. } => {
context_before:         // we handle valid unary/binary ops above
context_after:             error(GenericConstantTooComplexSub::BinaryNotSupported(node.span))?