fix Select

Author: mgravell

src/RESPite/Messages/RespReader.cs

@@ -1771,7 +1771,7 @@ public readonly double ReadDouble()
     /// <summary>
     /// Try to read the current element as a <see cref="double"/> value.
     /// </summary>
-    public bool TryReadDouble(out double value, bool allowTokens = true)
+    public readonly bool TryReadDouble(out double value, bool allowTokens = true)
     {
         var span = Buffer(stackalloc byte[RespConstants.MaxRawBytesNumber + 1]);
 

toys/StackExchange.Redis.Server/RedisServer.cs

@@ -1237,8 +1237,7 @@ protected virtual TypedRedisValue Role(RedisClient client, in RedisRequest reque
         protected virtual TypedRedisValue Select(RedisClient client, in RedisRequest request)
         {
             var raw = request.GetValue(1);
-            if (!raw.IsInteger) return TypedRedisValue.Error("ERR invalid DB index");
-            int db = (int)raw;
+            if (!raw.TryParse(out int db)) return TypedRedisValue.Error("ERR invalid DB index");
             if (db < 0 || db >= Databases) return TypedRedisValue.Error("ERR DB index is out of range");
             client.Database = db;
             return TypedRedisValue.OK;

toys/StackExchange.Redis.Server/RespReaderExtensions.cs

@@ -20,6 +20,8 @@ public RedisValue ReadRedisValue()
             {
                 RespPrefix.Boolean => reader.ReadBoolean(),
                 RespPrefix.Integer => reader.ReadInt64(),
+                _ when reader.TryReadInt64(out var i64) => i64,
+                _ when reader.TryReadDouble(out var fp64) => fp64,
                 _ => reader.ReadByteArray(),
             };
         }