syntax_data: {"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"compile_error!(\"Top"}]}
source_snippet:         compile_error!("Top level option can't be target modifier");
context_before:     ($opt_name:ident, $opt_expr:expr, $mods:expr, $tmod_vals:expr, [$non_substruct:ident TARGET_MODIFIER]) => {
context_after:     };