syntax_data: {"ast_node_type":"other","tokens":[{"end":41,"kind":"keyword","start":0,"text":"($("}]}
source_snippet:     ($( {$($optinfo:tt)*} ),* $(,)*) => {
context_before: macro_rules! top_level_tmod_enum {
context_after:         top_level_tmod_enum! { @parse {}, (user_value){}; $($($optinfo)*|)* }