How to switch on reflect.Type?

Question

I have managed to do this, but it does not look efficient:

var t reflect.Type
switch t {
case reflect.TypeOf(([]uint8)(nil)):
    // handle []uint8 array type
}

Answer 1

First question, are you sure you want to switch on reflect.Type and not use a type switch? Example:

switch x := y.(type) {
case []uint8:
  // x is now a []uint8
}

Assuming that will not work for your situation, my recommendation is to make those package variables. Example:

var uint8SliceType = reflect.TypeOf(([]uint8)(nil))

func Foo() {
    var t reflect.Type
    switch t {
    case uint8SliceType:
        // handle []uint8 array type
    }

}

Answer 2

you may not need reflect if you are just trying to detect type.

switch t := myVar.(type){
  case []uint8:
    // t is []uint8
  case *Foo:
    // t is *Foo
  default:
    panic("unknown type")
}

What are you actually trying to accomplish?