syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"|"}]}
source_snippet:         | ExprKind::LoopMatch { .. } => {
context_before:         | ExprKind::Loop { .. }
context_after:             error(GenericConstantTooComplexSub::LoopNotSupported(node.span))?