Overview

Idris is a general purpose pure functional programming language with dependent types. Dependent types allow types to be predicated on values, meaning that some aspects of a program’s behaviour can be specified precisely in the type. It is compiled, with eager evaluation. Its features are influenced by Haskell and ML, and include:

• Full dependent types with dependent pattern matching
• where clauses, with rule, simple case expressions, pattern matching let and lambda bindings
• Dependent records with projection and update
• Type classes
• Monad comprehensions
• Syntactic conveniences for lists, tuples, dependent pairs
• do notation and idiom brackets
• Indentation significant syntax
• Extensible syntax
• Tactic based theorem proving (influenced by Coq)
• Cumulative universes
• Totality checking
• Simple foreign function interface (to C)
• Hugs style interactive environment

There is a mailing list and a tutorial. You can also see a simple example.

There is also an irc channel #idris on freenode. Point your irc client to chat.freenode.net then /join #idris. Alternatively, there is a web interface.

Contact

Idris is mainly developed by Edwin Brady at the University of St Andrews.