Bit flag to enum not getting the right results

Question

In the below code, i'm trying to convert int bit flags to enum, but I'm not getting the right results.

Enum Flags

enum class State {
    NONE = 0,
    FORWARD =4,
    BACKWARD =5, 
}  

Bit Flag and conversion

 infix fun Int.withFlag(flag: Int) = this or flag
    fun fromInt(value: Int) = values().mapNotNull {
        if (it.value.withFlag(value) == value ) it else null 
    }

Action

 // backward
    val flag = 5
    State.fromInt(flag) 

Results

// results  NONE, FORWARD, BACKWARD
// expected BACKWARD

Answer 1

Something like this maybe:

enum class State(val value: Int) {
    NONE(0),
    FORWARD(4),
    BACKWARD(5);

    companion object {
        fun getByVal(arg: Int) : State? = values().firstOrNull { it.value == arg }
    }
}

State.getByVal(5) //BACKWARD
State.getByVal(7) //null