syntax_data: {"ast_node_type":"other","tokens":[{"end":63,"kind":"keyword","start":0,"text":"LayoutCalculatorError::NonPrimitiveSimdType(field)"}]}
source_snippet:         LayoutCalculatorError::NonPrimitiveSimdType(field) => {
context_before:         }
context_after:             // This error isn't caught in typeck, e.g., if