syntax_data: {"ast_node_type":"other","tokens":[{"end":60,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // e.g. in stdarch and whether the given name matches LLVM's
context_before: // check whether they're named already elsewhere in rust
context_after: // if it doesn't, to_llvm_feature in llvm_util in rustc_codegen_llvm needs to be adapted.