pads-haskell

Massive amounts of useful data are stored and processed in ad hoc formats for which common tools like parsers, printers, query engines and format converters are not readily available. Pads/Haskell is a domain-specific language that facilitates the generation of data processing tools for ad hoc formats. Pads/Haskell includes features such as dependent, polymorphic and recursive datatypes, which allow programmers to describe the syntax and semantics of ad hoc data in a concise, easy-to-read notation.

The pads haskell repository contains the code for the Haskell binding for PADS. For more information about the project, see the pads website (www.padsproj.org).

Building

pads-haskell currently requires GHC 8.2.2 and stack resolver lts-11.3.

Setup

To generate an appropriate Stack configuration file and install an appropriate GHC tool chain:

$ stack solver    # Updates stack.yaml if necessary
$ stack setup     # Installs ghc in a sandbox for you

Build

To build pads-haskell:

$ stack build

Testing

To run the automated testing infrastructure:

$ stack test :examples --ghc-options="-ddump-splices"
# Followed by this if you want to see the dumped splice files:
$ find . -name *.dump-splices

To run individual tests do:

$ stack repl
λ> :l Examples.First
...
λ> test
Cases: 89  Tried: 89  Errors: 0  Failures: 0
Counts {cases = 89, tried = 89, errors = 0, failures = 0}
(0.11 secs, 0 bytes)

Contributing and Development

In order to build and view the haddock documentation do the following:

stack haddock
firefox `find .stack-work -name index.html | grep "html/pads-haskell"`

Pull requests are strongly encouraged, though we're more likely to merge them in a timely fashion if they either add small features to existing modules or are new PADS descriptions to add to the examples directory.