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Hugs-Specific Libraries

• Trex This library supports TREX extensible records. These can only be used when Hugs is compiled with TREX support using the -enable-TREX configuration option. TREX documentation is included in this release.

• Dynamic This library provides support for dynamic typing.

• HugsInternals This library provides primitives for accessing Hugs internals; for example, they provide the means with which to implement simple error-recovery and debugging facilities in Haskell. They should be regarded as an experimental feature and may not be supported in future versions of Hugs. They can only be used if Hugs was configured with the --enable-internal-prims flag.

• GenericPrint This library provides a "generic'' (or "polymorphic'') print function in Haskell, that works in essentially the same way as Hugs' builtin printer when the -u option is used. The module HugsInternals is required.

• CVHAssert This library provides a simple implementation of Cordy Hall's assertions for performance debugging. These primitives are an experimental feature that may be removed in future versions of Hugs. They can only be used if Hugs was configured with the --enable-internal-prims flag.

• Win32 This library contains Haskell versions for many of the functions in the Microsoft Win32 library. It is only available on Windows 95/NT. The --with-plugins configuration option must be used in conjunction with this and the other Microsoft libraries.

• Graphics A comprehensive graphics and windowing library for Win32 is described separately. This is a higher level interface to much of the Win32 library.

• XLib This library provides facilities for X window programming.

• RandomIO This library provides a random number generator, using the clock as a seed. Currently, it is available only on Win32, although it may be moved into an official Library module at some point in the future.