A type that represents computation the result of which doesn't matter.
It has only one value that means nothing, and is also known as
the unit type.
singleton void
Declaration: void
Announcements: void
Direct supertypes: data
Use: reference / boolean / boolean / sign / sign / sign / collection / list / list / list / list / set / set / ordered set / ordered set / ordered set / closeable / syncable / output / output / log level / log level / log level / log level / log level / log level / log level / log level / log level / reference wrapper / reference wrapper / variable context / graph / base readonly list / base readonly list / base readonly list / base readonly list / base readonly list / base list / base list / base list / base list / base list / utilities / utilities / utilities / base list dictionary / list dictionary / base hash dictionary / base hash dictionary / base hash dictionary / hash dictionary / hash dictionary / base hash set / base hash set / hash set / hash set / hash set / hash set / hash set / hash set / validatable / one pattern / base repeat element / sequence pattern / procedure matcher / option pattern / option pattern / repeat pattern / option matcher / list pattern / underline style / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / text formatter / plain formatter / plain formatter / plain formatter / plain formatter / plain formatter / plain formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup formatter / markup grammar / markup grammar / markup grammar / markup grammar / markup grammar / markup parser / markup parser / markup parser / text utilities / test markup grammar / constant reference / constant reference / simple reference / simple reference / appender / appender / appender / appender / appender / output counter / output counter / output counter / output counter / output transformer / output transformer / output transformer / output transformer / auto sync output / auto sync output / auto sync output / auto sync output / resource store / resource store / base resource catalog / base resource identifier / resource util / test resolver / test resolver / log / log / log / base graph / flags utilities / flags utilities / flags utilities / test flags / json parser / json parser / json printer / json printer / json printer / json printer / json printer / json printer / all tests / all tests / run tests