是否可以使用反射来做类似于类型开关的事情？

Question

I need to do different things based on the type of the value being reflected.

value := reflect.ValueOf(someInterface)

I'd like to do something that has the following effect:

if <type of value> == <type1> {
    do something
} else if <type of value> == <type2> {
    do something
}

This is something similar to what a type switch does in go code.

Answer 1

If you are iterating over fields of a struct, you can use a type switch to perform different actions based off of the field's type:

value := reflect.ValueOf(s)
for i := 0; i < value.NumField(); i++ {
    field := value.Field(i)
    if !field.CanInterface() {
        continue
    }
    switch v := field.Interface().(type) {
    case int:
        fmt.Printf("Int: %d
", v)
    case string:
        fmt.Printf("String: %s
", v)
    }
}

https://play.golang.org/p/-B3PWMqWTo