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{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE OverloadedStrings #-}
{- HLINT ignore "Functor law" -}
-- | Implementation of a (partial) FRET requirements database parser and a
-- datatype representing FRET Requirements DB files.
--
-- FRET files are JSON files, which is implemented using type classes, so the
-- parser is defined in the same module as the AST to avoid having orphan
-- instances.
--
module Language.FRETReqsDB.AST where
-- External imports
import Data.Aeson ( FromJSON (..), Value (Object), withObject,
(.:) )
import Data.Aeson.Types ( prependFailure, typeMismatch )
import qualified Data.Text as T
import GHC.Generics ( Generic )
-- Internal imports
import qualified Language.CoCoSpec.AbsCoCoSpec as CoCoSpec
import qualified Language.CoCoSpec.ParCoCoSpec as CoCoSpec ( myLexer,
pBoolSpec )
import qualified Language.SMV.AbsSMV as SMV
import qualified Language.SMV.ParSMV as SMV ( myLexer, pBoolSpec )
-- * FRETReqsDB file format
-- | Datatype representing FRETReqsDB files.
--
-- Only the fields we are interested in are supported.
data FRETReqsDB = FRETReqsDB
{ reqid :: T.Text
, parent_reqid :: T.Text
, project :: T.Text
, rationale :: T.Text
, fulltext :: T.Text
, semantics :: FRETSemantics
}
deriving (Generic, Show)
-- | Instance to parse FRETReqsDB files in JSON format.
instance FromJSON FRETReqsDB where
parseJSON (Object v) = FRETReqsDB
<$> v .: "reqid"
<*> v .: "parent_reqid"
<*> v .: "project"
<*> v .: "rationale"
<*> v .: "fulltext"
<*> v .: "semantics"
parseJSON invalid =
prependFailure "parsing FRET Requirement Database failed, "
(typeMismatch "Object" invalid)
-- | Datatype representing the semantics key of a FRET file.
--
-- Only the fields we are interested in are supported.
data FRETSemantics = FRETSemantics
{ semanticsType :: T.Text
, semanticsFretish :: Either String SMV.BoolSpec
, semanticsCoCoSpec :: Either String CoCoSpec.BoolSpec
}
deriving (Generic, Show)
-- | Instance to parse FRET semantics keys in JSON format.
instance FromJSON FRETSemantics where
parseJSON = withObject "semantics" $ \v -> FRETSemantics
<$> v .: "type"
<*> (SMV.pBoolSpec <$> SMV.myLexer <$> T.unpack <$> v .: "ptExpanded")
<*> (CoCoSpec.pBoolSpec
<$> CoCoSpec.myLexer <$> T.unpack <$> v .: "CoCoSpecCode")