anchor.diff:      let env''''' = makeCDeclFunctions env'''' funcs
       let env'''''' = makeCDeclExterns env''''' dels
       env''''''
  +
   //-------------------------------------------------------------------------
   // CEnv
   //-------------------------------------------------------------------------
  
positive.code:     | x -> failwithf "Expression, %A, not supported." x
  
  let makeCExprFallback (env: CEnv) (func: MethodInfo) =
      // HACK: Handling non-reflected methods that have delegates. This is used for exported F# functions to C.
      match func.GetParameters () with
      | [|x|] when x.ParameterType.BaseType = typeof<MulticastDelegate> ->
          let typ = x.ParameterType
          let name = sprintf "%s_%s" env.Name (typ.Name.Replace ("Delegate", ""))
          Text <| sprintf "%s = ptr;" name
  
negative.code: 
  let makeCField typ name = { CField.Type = typ; Name = name }
  
  let makeReturnType env = function
      | x when x = typeof<Void> -> None
      | x when x.IsArray ->  failwithf "Arrays cannot be return types."
  