syntax_data: {"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"#[cfg(all(target_pointer_width"}]}
source_snippet:     #[cfg(all(target_pointer_width = "64", target_endian = "big"))]
context_before:     pub krate: CrateNum,
context_after:     pub index: DefIndex,