{-# LANGUAGE MultiParamTypeClasses #-}
module Language.SpirV.FunctionControl where

import Data.Word (Word32)
import Language.SpirV.SpirEnum
import qualified Language.SpirV.Capability as Capability


-- | <https:\/\/www.khronos.org\/registry\/spir-v\/specs\/1.0\/SPIRV.html#_a_id_function_control_a_function_control Source for Function Control>
data FunctionControl =
    None
  | Inline
  | DontInline
  | Pure
  | Const
  deriving(Read, Show, Eq, Ord)

instance SpirEnum FunctionControl Word32 where
  toWord None = 0
  toWord Inline = 1
  toWord DontInline = 2
  toWord Pure = 4
  toWord Const = 8

  fromWord 0 = Just None
  fromWord 1 = Just Inline
  fromWord 2 = Just DontInline
  fromWord 4 = Just Pure
  fromWord 8 = Just Const
  fromWord _ = Nothing

  
  requiredCapabilities _ = []