1 Hugs 98 is a functional programming system based on Haskell 98, the de
2 facto standard for non-strict functional programming languages. Hugs 98
3 provides an almost complete implementation of Haskell 98, including:
5 * Lazy evaluation, higher order functions, and pattern matching.
6 * A wide range of built-in types, from characters to bignums, and lists
7 to functions, with comprehensive facilities for defining new datatypes
9 * An advanced polymorphic type system with type and constructor class
11 * All of the features of the Haskell 98 expression and pattern syntax
12 including lambda, case, conditional and let expressions, list
13 comprehensions, do-notation, operator sections, and wildcard,
14 irrefutable and `as' patterns.
15 * An implementation of the Haskell 98 primitives for monadic I/O, with
16 support for simple interactive programs, access to text files,
17 handle-based I/O, and exception handling.
18 * An almost complete implementation of the Haskell module system.
19 Hugs 98 also supports a number of advanced and experimental extensions
20 including multi-parameter classes, extensible records, rank-2
21 polymorphism, existentials, scoped type variables, and restricted