syntax_data: {"ast_node_type":"variable","tokens":[{"end":61,"kind":"keyword","start":0,"text":"let"}]}
source_snippet:     let attrs = if tcx.def_kind(def_id).has_codegen_attrs() {
context_before:     // FIXME(eddyb) Precompute a custom symbol name based on attributes.
context_after:         &tcx.codegen_instance_attrs(instance.def)