g2q: G2Q allows constraint programming, via writing Haskell predicates.

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G2Q allows constraint programming, via writing Haskell predicates. A quasiquoter, g2, is provided which can take concrete arguments at runtime, and solve for unknown symbolic arguments.

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Modules

G2Q
- G2Q.Interface

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g2q-0.1.0.0.tar.gz [browse] (Cabal source package)
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WilliamHallahan

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0.1.0.0

Versions [RSS]	0.1.0.0
Change log	ChangeLog.md
Dependencies	base (>=4.10 && <4.11), g2 (>=0.1.0.1 && <0.1.1.0) [details]
License	BSD-3-Clause
Author	William Hallahan, Anton Xue
Maintainer	william.hallahan@yale.edu
Category	Formal Methods, Symbolic Computation
Source repo	head: git clone https://github.com/BillHallahan/G2Q.git
Uploaded	by WilliamHallahan at 2019-06-30T03:12:47Z
Distributions
Downloads	520 total (3 in the last 30 days)
Rating	(no votes yet) [estimated by Bayesian average]
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Status	Docs not available [build log] All reported builds failed as of 2019-06-30 [all 2 reports]

Readme for g2q-0.1.0.0

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G2Q

About

G2Q allows constraint programming, via writing Haskell predicates. A quasiquoter, g2, is provided which can take concrete arguments at runtime, and solve for unknown symbolic arguments.

For example, to find inputs from a list xs which sum to a given number n, you can write:

sumToN :: Int -> [Int] -> IO (Maybe [Int])
sumToN = [g2| \(n :: Int) (xs :: [Int]) ->
              ?(ys :: [Int])
            |  sum ys == n
            && all (\e -> e `elem` xs) ys
            && length ys >= 1 |]