syntax_data: {"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"//!"}]}
source_snippet: //! compiler 'backend', though LLVM is rustc's backend, so rustc_target
context_before: //! Originally extracted from rustc::back, which was nominally the
context_after: //! is really just odds-and-ends relating to code gen and linking.