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{-# LANGUAGE UndecidableInstances #-}

module Feldspar.Core.Constructs.SourceInfo
    ( module Language.Syntactic.Constructs.Identity
    , module Language.Syntactic.Constructs.Decoration
    , SourceInfo1 (..)
    ) where


import Language.Syntactic
import Language.Syntactic.Constructs.Binding
import Language.Syntactic.Constructs.Decoration
import Language.Syntactic.Constructs.Identity

import Feldspar.Core.Types
import Feldspar.Core.Interpretation



-- | Kind @* -> *@ version of 'SourceInfo'
data SourceInfo1 a = SourceInfo1 SourceInfo

instance AlphaEq dom dom dom env =>
    AlphaEq
        (Decor SourceInfo1 (Identity TypeCtx))
        (Decor SourceInfo1 (Identity TypeCtx))
        dom
        env
  where
    alphaEqSym = alphaEqSymDefault

instance Sharable (Decor SourceInfo1 (Identity TypeCtx))
  where
    sharable _ = True

instance SizeProp (Identity TypeCtx)
  where
    sizeProp Id (WrapFull a :* Nil) = infoSize a

instance SizeProp (Decor SourceInfo1 (Identity TypeCtx))
  where
    sizeProp = sizeProp . decorExpr

instance (Decor SourceInfo1 (Identity TypeCtx) :<: dom, Optimize dom dom) =>
    Optimize (Decor SourceInfo1 (Identity TypeCtx)) dom
  where
    optimizeFeat (Decor (SourceInfo1 src) Id) (a :* Nil) =
        localSource src $ optimizeM a

    constructFeatOpt (Decor (SourceInfo1 src) Id) (a :* Nil) = return a

    constructFeatUnOpt = constructFeatUnOptDefault