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{-# LANGUAGE GADTs #-}
{-# LANGUAGE TypeOperators #-}
{-# LANGUAGE FlexibleInstances #-}
{-# LANGUAGE UndecidableInstances #-}
{-# LANGUAGE MultiParamTypeClasses #-}

module Feldspar.Compiler.Imperative.FromCore.Primitive where



import Language.Syntactic

import Feldspar.Core.Types (Type)
import Feldspar.Core.Interpretation
import Feldspar.Core.Constructs.Bits
import Feldspar.Core.Constructs.Complex
import Feldspar.Core.Constructs.Conversion
import Feldspar.Core.Constructs.Eq
import Feldspar.Core.Constructs.Floating
import Feldspar.Core.Constructs.Fractional
import Feldspar.Core.Constructs.Integral
import Feldspar.Core.Constructs.Logic
import Feldspar.Core.Constructs.Num
import Feldspar.Core.Constructs.Ord
import Feldspar.Core.Constructs.RealFloat
import Feldspar.Core.Constructs.Trace

import Feldspar.Compiler.Imperative.Frontend
import Feldspar.Compiler.Imperative.Representation (Expression(..))
import Feldspar.Compiler.Imperative.FromCore.Interpretation



-- | Converts symbols to primitive function calls
instance Compile dom dom => Compile Semantics dom
  where
    compileExprSym (Sem name _) info args = do
        argExprs <- sequence $ listArgs compileExpr args
        return $ fun (compileTypeRep (infoType info) (infoSize info)) name argExprs

-- | Convenient implementation of 'compileExprSym' for primitive functions
compilePrim :: (Semantic expr, Compile dom dom)
    => (expr :|| Type) a
    -> Info (DenResult a)
    -> Args (AST (Decor Info dom)) a
    -> CodeWriter (Expression ())
compilePrim (C' s) = compileExprSym $ semantics s

instance Compile dom dom => Compile (BITS       :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (COMPLEX    :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (Conversion :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (EQ         :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (FLOATING   :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (FRACTIONAL :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (INTEGRAL   :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (Logic      :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (NUM        :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (ORD        :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (REALFLOAT  :|| Type) dom where compileExprSym = compilePrim
instance Compile dom dom => Compile (Trace      :|| Type) dom where compileExprSym = compilePrim