syntax_data: {"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"base.features"}]}
source_snippet:     base.features = "+v8a,+crc,+aes,+sha2,+neon".into();
context_before:     base.cpu = "generic".into();
context_after:     base.max_atomic_width = Some(128);