Language extensions in nhc98
What language extensions does nhc98 support?
Extensions of the Haskell'98 language available in nhc98 include:
The standard primitive FFI language addendum.
Extended module namespaces, of the form Long.Hierarchical.Module.Name.
Local forall quantification on datatypes. (Also known as existential
types, not to be confused with rank-2 types.)
Pattern guards (new in 1.20).
Some common standard hierarchical libraries packages. Use the
compiler option e.g. -package base to access them.
The NHC.IOExtras library, containing IORefs, IOArrays, trace,
Andy Gill's Observe.lhs library, used for HOOD debugging.
A Binary data representation library.
In summary, this library
module provides bit-stream operations and a new Binary class for which
the compiler fully supports "deriving" clauses.
Fuller details can be found in  and in
 The Bits Between The Lambdas - Binary Data in a Lazy Functional Language,
Malcolm Wallace and Colin Runciman, Proceedings of the International
Symposium on Memory Management, Vancouver, Oct 1998.
The latest updates to these pages are available on the WWW from
23rd November 2007
York Functional Programming Group