bitpos does not support bit and byteargument

[dirkm]

Expected Behavior

I expect bitpos to take start and end prefixes as bits and as bytes

Current Behavior

The interface does not allow to give the last argument bit or byte

Possible Solution

Change the interface to support bit and byte. i.e. with

diff --git a/commands.go b/commands.go
index ac93f39..03a3030 100644
--- a/commands.go
+++ b/commands.go
@@ -192,7 +192,7 @@ type Cmdable interface {
        BitOpOr(ctx context.Context, destKey string, keys ...string) *IntCmd
        BitOpXor(ctx context.Context, destKey string, keys ...string) *IntCmd
        BitOpNot(ctx context.Context, destKey string, key string) *IntCmd
-       BitPos(ctx context.Context, key string, bit int64, pos ...int64) *IntCmd
+      BitPos(ctx context.Context, key string, args ...interface{}) *IntCmd
        BitField(ctx context.Context, key string, args ...interface{}) *IntSliceCmd

Steps to Reproduce

Below is the syntax using redis-cli:

$ redis-cli 
127.0.0.1:6379> Set mykey '\xff\xf0\x00' 
OK
127.0.0.1:6379> bitpos mykey 0 0 2 byte
(integer) 0
127.0.0.1:6379> bitpos mykey 0 0 2 bit
(integer) 0
127.0.0.1:6379> 

Context (Environment)

My code is more complex then it needs to be because offsets in bits are not supported.

[monkey92t]

fix by #2498

[dirkm]

thank you for the quick patch!