Ceylon is an open source language for writing large programs in teams that is influenced by Java. It is a “higher-order” language partly because functions, classes, methods, and attributes are typed values, and provides a typesafe metamodel.
It has a powerful static type system that prevents many bugs while letting you express more, more easily: union types, intersection types, higherorder functions, mixin inheritance, and enumerated types.
- Prioritizes readability, via a highly regular syntax which is derived from C.
- Powerful static type system that prevents many bugs.
- Declarative syntax for treelike structures.
- Union types, intersection types, higher order functions, mixin inheritance, and enumerated types.
- Polymorphic attributes.
- Type aliases and type inference.
- Higher-order functions.
- Tuples – a kind of linked list, where the static type of the list encodes the static type of each element of the list.
- Declaration-site variance.
- Rich set of operators, including most of the operators supported by C and Java.
- Typesafe null and flow-dependent typing.
- Support for modules.
- Complete platform with a modern, modular SDK designed from scratch.
- Compiler produces module archives which are then distributed via a next-generation repository architecture with Ceylon Herd.
- Complete command line toolset, and a very complete Eclipse based IDE with searching, refactoring, quick fixes and assists, autocompletion, debugging, and more.
- Interoperability with Maven repositories, so that you can use Maven modules as if they were Ceylon modules.
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