Revision as of 00:16, 23 July 2012 (view source) rosettacode>Rabuf (→‎{{header\|Erlang}}: added implementation) ← Older edit		Revision as of 21:09, 26 July 2012 (view source) rosettacode>Vorov2 (→‎{{header\|Ela}}) Newer edit →
Line 355: =={{header\|Ela}}== Ela supports algebraic types: ~~Ela supports variant type (similar to polymorphic variants in OCaml). No definition for variants is required:~~ <lang ela>~~point~~type ~~x y~~Maybe = ~~Point~~None \| xSome ya</lang> Except of regular algebraic types, Ela also provides a support for open algebraic types - which can be extended any time with new constructors: ~~Variants can also be used when constructing user types. A user type declaration in Ela can have one more constructor functions or constants:~~ <lang ela>~~type~~opentype ~~foobar~~Several = One \| Two \| Three ~~where foo x = Foo x~~ ~~bar x = Bar x</lang>~~ //Add new constructor to an existing type ~~In the code sample above we introduce a custom type foobar with two constructor functions that return variants Foo and Bar. Both of them belong to foobar type.~~ data Several = Four</lang> =={{header\|Erlang}}==

Compound data type (view source)