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In the § More complex examples section above, calc is used in two senses, showing that there is a Haskell type class namespace and also a namespace for values: a Haskell type class for calc. The domain and range can be explicitly denoted in a Haskell type class. a Haskell value, formula, or expression for calc.
Hugs (Haskell User's Gofer System), also Hugs 98, is a bytecode interpreter for the functional programming language Haskell. Hugs is the successor to Gofer, and was originally derived from Gofer version 2.30b. [1] Hugs and Gofer were originally developed by Mark P. Jones, now a professor at Portland State University.
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As of GHC-6.10, Template Haskell provides support for user-defined quasi-quoters, which allows users to write parsers which can generate Haskell code from an arbitrary syntax. This syntax is also enforced at compile time. For example, using a custom quasi-quoter for regular expressions could look like this:
In this case, most other languages provide different primitives as they typically distinguish pair structures from list structures either typefully or semantically. Particularly in typed languages, lists, pairs, and trees will all have different accessor functions with different type signatures: in Haskell , for example, car and cdr become fst ...
The Glasgow Haskell Compiler (GHC) is a native or machine code compiler for the functional programming language Haskell. [5] It provides a cross-platform software environment for writing and testing Haskell code and supports many extensions, libraries, and optimisations that streamline the process of generating and executing code.
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Parsec is a library for writing parsers written in the programming language Haskell. [3] It is based on higher-order parser combinators, so a complicated parser can be made out of many smaller ones. [4]