changed LengthFunctionDelegate to Func<string, int>

src/libs/LangChain.Core/Base/BaseLoader.cs

@@ -0,0 +1,13 @@
+using LangChain.Docstore;
+
+namespace LangChain.Base;
+
+public abstract class BaseLoader
+{
+    public abstract List<Document> Load();
+
+    public List<Document> LoadAndSplit(TextSplitter textSplitter=null)
+    {
+        throw new NotImplementedException();
+    }
+}

src/libs/LangChain.Core/Base/TextSplitter.cs

@@ -13,11 +13,11 @@ public abstract class TextSplitter
 {
     private readonly int _chunkSize;
     private readonly int _chunkOverlap;
-    private readonly LengthFunctionDelegate _lengthFunction;
+    private readonly Func<string, int> _lengthFunction;
 
-    public delegate int LengthFunctionDelegate(string str);
+
 
-    protected TextSplitter(int chunkSize = 4000, int chunkOverlap = 200, LengthFunctionDelegate? lengthFunction = null)
+    protected TextSplitter(int chunkSize = 4000, int chunkOverlap = 200, Func<string,int>? lengthFunction = null)
     {
         if (chunkOverlap > chunkSize)
         {
@@ -26,7 +26,7 @@ protected TextSplitter(int chunkSize = 4000, int chunkOverlap = 200, LengthFunct
 
         _chunkSize = chunkSize;
         _chunkOverlap = chunkOverlap;
-        _lengthFunction = lengthFunction ?? new LengthFunctionDelegate((str) => str.Length);
+        _lengthFunction = lengthFunction ?? new Func<string, int>((str) => str.Length);
     }
 
     public abstract List<string> SplitText(string text);