support const "enum" values with stringer.String values?

[rcoreilly]

I would like to be able to eval an expr like this: EnumVal == Enum1 where I've defined ConstVal to be a standard Go const enum type:

//go:generate stringer -type=MyEnums

type MyEnums int

const (
    Enum1 MyEnums = iota
    Enum2 
)

type MyStruct struct {
    EnumVal MyEnums
}

var stru MyStruct

ev := expr.Eval(`EnumVal==Enum1`, stru)

so the string values are available and could be tested against.

Any chance of adding this?