| Line No. | Rev | Author | Line |
|---|---|---|---|
| 1 | 1 | paulosilva | |
| 2 | 1 | paulosilva | {-# LANGUAGE FlexibleContexts #-} |
| 3 | 1 | paulosilva | {-# OPTIONS_GHC -Wall #-} |
| 4 | 1 | paulosilva | |
| 5 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 6 | 1 | paulosilva | |
| 7 | 1 | paulosilva | {- | |
| 8 | 1 | paulosilva | Module : Language.Law.Refresh |
| 9 | 1 | paulosilva | Description : Operations for refreshing the variable names. |
| 10 | 1 | paulosilva | Copyright : (c) Paulo Silva |
| 11 | 1 | paulosilva | License : LGPL |
| 12 | 1 | paulosilva | |
| 13 | 1 | paulosilva | Maintainer : paufil@di.uminho.pt |
| 14 | 1 | paulosilva | Stability : experimental |
| 15 | 1 | paulosilva | Portability : portable |
| 16 | 1 | paulosilva | |
| 17 | 1 | paulosilva | -} |
| 18 | 1 | paulosilva | |
| 19 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 20 | 1 | paulosilva | |
| 21 | 1 | paulosilva | module Language.Law.Refresh ( |
| 22 | 1 | paulosilva | refresh |
| 23 | 1 | paulosilva | ) where |
| 24 | 1 | paulosilva | |
| 25 | 1 | paulosilva | import Control.Monad.Fresh |
| 26 | 1 | paulosilva | import Control.Monad.Reader |
| 27 | 1 | paulosilva | import Data.List |
| 28 | 1 | paulosilva | import Language.Law.SyntaxADT |
| 29 | 1 | paulosilva | import qualified Language.R.Refresh as R |
| 30 | 1 | paulosilva | import Language.R.SyntaxADT |
| 31 | 1 | paulosilva | |
| 32 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 33 | 1 | paulosilva | |
| 34 | 1 | paulosilva | refresh :: MonadFresh [String] String m => LawS -> m LawS |
| 35 | 1 | paulosilva | refresh (EquivS p n s1 s2) = aux (EquivS p n) s1 s2 |
| 36 | 1 | paulosilva | refresh (ImplS p n s1 s2) = aux (ImplS p n) s1 s2 |
| 37 | 1 | paulosilva | |
| 38 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 39 | 1 | paulosilva | |
| 40 | 1 | paulosilva | aux :: MonadFresh [String] String m => (S -> S -> LawS) -> S -> S -> m LawS |
| 41 | 1 | paulosilva | aux constr s1 s2 = let |
| 42 | 1 | paulosilva | (rvar1,tvar1) = R.collect s1 |
| 43 | 1 | paulosilva | (rvar2,tvar2) = R.collect s2 |
| 44 | 1 | paulosilva | rvar = nub $ rvar1 ++ rvar2 |
| 45 | 1 | paulosilva | tvar = nub $ tvar1 ++ tvar2 |
| 46 | 1 | paulosilva | in do |
| 47 | 1 | paulosilva | newVars <- R.refreshVar rvar |
| 48 | 1 | paulosilva | newTypes <- R.refreshType tvar |
| 49 | 1 | paulosilva | let s1' = runReader (R.replace s1) $ R.St {R.rvars = newVars, |
| 50 | 1 | paulosilva | R.tvars = newTypes} |
| 51 | 1 | paulosilva | s2' = runReader (R.replace s2) $ R.St {R.rvars = newVars, |
| 52 | 1 | paulosilva | R.tvars = newTypes} |
| 53 | 1 | paulosilva | return $ constr s1' s2' |
| 54 | 1 | paulosilva | |
| 55 | 1 | paulosilva | ------------------------------------------------------------------------------- |
| 56 | 1 | paulosilva |