syntax_data: {"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"//"}]}
source_snippet: // To generate CodegenOptionsTargetModifiers and UnstableOptionsTargetModifiers enums
context_before: #![feature(rustc_attrs)]
context_after: // with macro_rules, it is necessary to use recursive mechanic ("Incremental TT Munchers").