syntax_data: {"ast_node_type":"other","tokens":[{"end":74,"kind":"keyword","start":0,"text":"tcx.mk_layout(LayoutData::scalar_pair(cx,"}]}
source_snippet:             tcx.mk_layout(LayoutData::scalar_pair(cx, data_ptr, metadata))
context_before:             // Effectively a (ptr, meta) tuple.
context_after:         }