some properties require non-empty layers

1 files changed, 4 insertions, 2 deletions

diff --git a/lib/Tiled2.hs b/lib/Tiled2.hs
index c3bf401..8220bfb 100644
--- a/lib/Tiled2.hs
+++ b/lib/Tiled2.hs
@@ -1,6 +1,6 @@
-{-# LANGUAGE LambdaCase #-}
 {-# LANGUAGE DeriveGeneric              #-}
 {-# LANGUAGE GeneralizedNewtypeDeriving #-}
+{-# LANGUAGE LambdaCase                 #-}
 {-# LANGUAGE OverloadedStrings          #-}
 {-# LANGUAGE RecordWildCards            #-}
 -- | This module provides Haskell types for Tiled's JSON exports, which you can
@@ -18,6 +18,7 @@ import           Data.Aeson                 hiding (Object)
 import qualified Data.Aeson                 as A
 import           Data.Aeson.Types           (Parser, typeMismatch)
 import qualified Data.ByteString.Lazy.Char8 as C8
+import           Data.Functor               ((<&>))
 import           Data.Map                   (Map)
 import qualified Data.Map                   as M
 import           Data.Maybe                 (fromMaybe)
@@ -25,13 +26,14 @@ import           Data.Text                  (Text)
 import           Data.Vector                (Vector)
 import           GHC.Exts                   (fromList, toList)
 import           GHC.Generics               (Generic)
-import Data.Functor ((<&>))
 
 
 -- | A globally indexed identifier.
 newtype GlobalId = GlobalId { unGlobalId :: Int }
   deriving (Ord, Eq, Enum, Num, Generic, Show, FromJSON, ToJSON, FromJSONKey, ToJSONKey)
 
+mkTiledId :: Int -> GlobalId
+mkTiledId i = GlobalId { unGlobalId = i }
 
 -- | A locally indexed identifier.
 newtype LocalId = LocalId { unLocalId :: Int }