Convert BitSetStructure to use value converter

Author: Genbox

Src/FastData/Internal/Structures/BitSetStructure.cs

@@ -19,12 +19,11 @@ public BitSetContext<TKey, TValue> Create(ReadOnlyMemory<TKey> keys, ReadOnlyMem
         ulong[] bitset = new ulong[(range + 63) / 64];
         TValue[]? denseValues = values.IsEmpty ? null : new TValue[range];
 
-        Func<TKey, long> func = GetLongConverter(keyType);
-        long minKey = func(props.MinKeyValue);
+        long minKey = props.ValueConverter(props.MinKeyValue);
 
         for (int i = 0; i < keySpan.Length; i++)
         {
-            ulong offset = (ulong)(func(keySpan[i]) - minKey);
+            ulong offset = (ulong)(props.ValueConverter(keySpan[i]) - minKey);
             int word = (int)(offset >> 6);
             bitset[word] |= 1UL << (int)(offset & 63);
 
@@ -34,18 +33,4 @@ public BitSetContext<TKey, TValue> Create(ReadOnlyMemory<TKey> keys, ReadOnlyMem
 
         return new BitSetContext<TKey, TValue>(bitset, denseValues);
     }
-
-    private static Func<TKey, long> GetLongConverter(KeyType keyType) => keyType switch
-    {
-        KeyType.SByte => static key => (sbyte)(object)key,
-        KeyType.Int16 => static key => (short)(object)key,
-        KeyType.Int32 => static key => (int)(object)key,
-        KeyType.Int64 => static key => (long)(object)key,
-        KeyType.Byte => static key => (byte)(object)key,
-        KeyType.UInt16 => static key => (ushort)(object)key,
-        KeyType.UInt32 => static key => (uint)(object)key,
-        KeyType.UInt64 => static key => (long)(ulong)(object)key,
-        KeyType.Char => static key => (ushort)(object)key,
-        _ => throw new InvalidOperationException($"Unsupported key type: {keyType}")
-    };
 }