SetWithExpire need to check the expire time <=0?

[Kevin Diu]

Since the data should expire immediately, is it better to check expire <=0 before it is set to the gache?

gache/gache.go

Line 282 in b5c48d4

 func SetWithExpire(key string, val interface{}, expire time.Duration) { 

[Yusuke Kato]

we need negative expiration variable for persistent cache