Use be more flexible about the return type

spec/redis_spec.cr

@@ -1187,6 +1187,13 @@ describe Redis do
         result = redis.eval("return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}", keys, args)
         result.should eq(["key1", "key2", "first", "second"])
       end
+
+      it "handles different return types" do
+        keys = ["key1", "key2"] of Redis::RedisValue
+        args = ["first", "second"] of Redis::RedisValue
+        result = redis.eval("return KEYS[1]", keys, args)
+        result.should eq("key1")
+      end
     end
 
     describe "#script_load / #eval_sha" do
@@ -1197,6 +1204,14 @@ describe Redis do
         result = redis.evalsha(sha1, keys, args)
         result.should eq(["key1", "first"])
       end
+
+      it "handles different return types" do
+        sha1 = redis.script_load("return KEYS[1]")
+        keys = ["key1", "key2"] of Redis::RedisValue
+        args = ["first", "second"] of Redis::RedisValue
+        result = redis.evalsha(sha1, keys, args)
+        result.should eq("key1")
+      end
     end
 
     describe "#script_kill" do

src/redis/command_execution/future_oriented.cr

@@ -47,6 +47,12 @@ class Redis
         command(request)
       end
 
+      # Executes a Redis command and casts the response to the correct type.
+      # This is an internal method.
+      def string_array_or_string_or_integer_command(request : Request) : Redis::Future
+        command(request)
+      end
+
       # Executes a Redis command and returns a Future.
       def string_array_or_string_or_nil_command(request : Request) : Redis::Future
         command(request)

src/redis/command_execution/value_oriented.cr

@@ -51,6 +51,12 @@ class Redis
         command(request).as(Array(RedisValue) | Int64)
       end
 
+      # Executes a Redis command and casts the response to the correct type.
+      # This is an internal method.
+      def string_array_or_string_or_integer_command(request : Request) : Array(RedisValue) | String | Int64
+        command(request).as(Array(RedisValue) | String | Int64)
+      end
+
       # Executes a Redis command and casts the response to the correct type.
       # This is an internal method.
       def string_array_or_string_command(request : Request) : Array(RedisValue) | String

src/redis/commands.cr

@@ -1470,23 +1470,23 @@ class Redis
     # EVAL and EVALSHA are used to evaluate scripts using the Lua interpreter
     # built into Redis starting from version 2.6.0.
     #
-    # **Return value**: Array(String), depends on the executed script
+    # **Return value**: Depends on the executed script
     #
     # Example:
     #
     # ```
     # redis.eval("return {KEYS[1],KEYS[2],ARGV[1],ARGV[2]}", ["key1", "key2"], ["first art", "second arg"])
     # ```
     def eval(script : String, keys = [] of RedisValue, args = [] of RedisValue)
-      string_array_or_integer_command(concat(["EVAL", script, keys.size.to_s], keys, args))
+      string_array_or_string_or_integer_command(concat(["EVAL", script, keys.size.to_s], keys, args))
     end
 
     # EVAL and EVALSHA are used to evaluate scripts using the Lua interpreter
     # built into Redis starting from version 2.6.0.
     #
-    # **Return value**: Array(String), depends on the executed script
+    # **Return value**: Depends on the executed script
     def evalsha(sha1, keys = [] of RedisValue, args = [] of RedisValue)
-      string_array_or_integer_command(concat(["EVALSHA", sha1.to_s, keys.size.to_s], keys, args))
+      string_array_or_string_or_integer_command(concat(["EVALSHA", sha1.to_s, keys.size.to_s], keys, args))
     end
 
     # Load a script into the scripts cache, without executing it.