some cleanup

lib.nix

@@ -18,10 +18,23 @@ let
   inherit (builtins) isString isFloat isInt isBool isList isAttrs isNull isPath;
   inherit (builtins) concatStringsSep filter mapAttrs attrValues;
 
-  error = message: throw "[nix2lua] ${message}";
+  ################################################################################
+  # Utils
+  ################################################################################
 
+  error = message: throw "[nix2lua] ${message}";
   warn = msg: builtins.trace "[nix2lua] warning: ${msg}";
 
+  getType = expr: if isAttrs expr && expr ? _type then expr._type else null;
+
+  validString = expr:
+    if isString expr || isPath expr then toString expr
+    else error "Value '${toString expr}' is not a valid string";
+
+  ################################################################################
+  # Low-Level
+  ################################################################################
+
   isJoin = expr: getType expr == "_join";
   join = sep: expr:
     if isList expr then { _type = "_join"; sep = validString sep; parts = expr; }
@@ -31,7 +44,7 @@ let
   mkLuaRaw = expr:
     if isLuaRaw expr then
       { _type = "raw"; raw = expr.raw; }
-    else if isString expr || isLuaRaw expr then
+    else if isString expr then
       { _type = "raw"; raw = expr; }
     else
       error "Value '${toString expr}' is not supported for a raw type";
@@ -48,12 +61,23 @@ let
       ++ [ (mkLuaRaw ")") ]
     );
 
+  toLuaStr = expr: "\"${validString expr}\"";
+  toLuaBool = expr: if expr then "true" else "false";
+
   isLuaNil = expr: getType expr == "nil";
   LuaNil = { _type = "nil"; };
-
   # DEPRECATED
   mkLuaNil = warn "`mkLuaNil` is deprecated. Use `LuaNil` instead" LuaNil;
 
+  toLuaList = onValue: expr:
+    let
+      wrapObj = expr: "{ ${concatStringsSep ", " expr} }";
+      excludeNull = expr: filter (v: !(isNull v)) expr;
+    in
+    wrapObj (excludeNull (map onValue expr));
+
+  toLuaTable = onValue: expr: onValue (attrValues (mapAttrs mkNamedField expr));
+
   mkNamedField = name: expr: {
     _type = "table_field";
     name = validString name;
@@ -64,8 +88,6 @@ let
     if isNull expr then null
     else "[${toLuaStr name}] = ${expr}";
 
-  toLua = val: toLuaInternal 0 val;
-
   toLuaInternal = depth: expr:
     let nextDepth = depth + 1; in
     if isJoin expr then concatStringsSep expr.sep (map (toLuaInternal depth) expr.parts)
@@ -74,32 +96,16 @@ let
     else if isNamedField expr then
       if depth > 0 then toLuaNamedField expr.name expr.value
       else error "You cannot render table field at the top level"
-    else if isAttrs expr then toLuaTable nextDepth expr
+    else if isAttrs expr then toLuaTable (toLuaInternal nextDepth) expr
-    else if isList expr then toLuaList nextDepth expr
+    else if isList expr then toLuaList (toLuaInternal nextDepth) expr
     else if isString expr || isPath expr then toLuaStr expr
     else if isFloat expr || isInt expr then toString expr
     else if isBool expr then toLuaBool expr
     else if isNull expr then null
     else error "Value '${toString expr}' is not supported yet";
 
-  toLuaList = depth: expr:
+  toLua = val: toLuaInternal 0 val;
-    wrapObj (excludeNull (map (toLuaInternal depth) expr));
 
-  toLuaTable = depth: expr: toLuaInternal depth (attrValues (mapAttrs mkNamedField expr));
-
-  excludeNull = expr: filter (v: !(isNull v)) expr;
-
-  wrapObj = expr: "{ ${concatStringsSep ", " expr} }";
-
-  toLuaStr = expr: "\"${validString expr}\"";
-
-  toLuaBool = expr: if expr then "true" else "false";
-
-  getType = expr: if isAttrs expr && expr ? _type then expr._type else null;
-
-  validString = expr:
-    if isString expr || isPath expr then toString expr
-    else error "Value '${toString expr}' is not a valid string";
 in
 {
   # low-level