1 files changed, 56 insertions, 0 deletions
diff --git a/src/Script/Var.hs b/src/Script/Var.hs
new file mode 100644
index 0000000..668060c
--- /dev/null
+++ b/src/Script/Var.hs
@@ -0,0 +1,56 @@
+module Script.Var (
+    VarName(..), textVarName, unpackVarName,
+    FqVarName(..), textFqVarName, unpackFqVarName, unqualifyName,
+    TypedVarName(..),
+    ModuleName(..), textModuleName,
+    SourceLine(..), textSourceLine,
+) where
+
+import Data.Text (Text)
+import Data.Text qualified as T
+
+
+newtype VarName = VarName Text
+    deriving (Eq, Ord)
+
+textVarName :: VarName -> Text
+textVarName (VarName name) = name
+
+unpackVarName :: VarName -> String
+unpackVarName = T.unpack . textVarName
+
+
+data FqVarName
+    = GlobalVarName ModuleName VarName
+    | LocalVarName VarName
+    deriving (Eq, Ord)
+
+textFqVarName :: FqVarName -> Text
+textFqVarName (GlobalVarName mname vname) = textModuleName mname <> "." <> textVarName vname
+textFqVarName (LocalVarName vname) = textVarName vname
+
+unpackFqVarName :: FqVarName -> String
+unpackFqVarName = T.unpack . textFqVarName
+
+unqualifyName :: FqVarName -> VarName
+unqualifyName (GlobalVarName _ name) = name
+unqualifyName (LocalVarName name) = name
+
+
+newtype TypedVarName a = TypedVarName { fromTypedVarName :: VarName }
+    deriving (Eq, Ord)
+
+
+newtype ModuleName = ModuleName [ Text ]
+    deriving (Eq, Ord, Show)
+
+textModuleName :: ModuleName -> Text
+textModuleName (ModuleName parts) = T.intercalate "." parts
+
+data SourceLine
+    = SourceLine Text
+    | SourceLineBuiltin
+
+textSourceLine :: SourceLine -> Text
+textSourceLine (SourceLine text) = text
+textSourceLine SourceLineBuiltin = "<builtin>"