Check type of struct in Go

Issue

I’m trying to check the type of a struct in Go. This was the best way I could come up with. Is there a better way to do it, preferably without initializing a struct?

package main

import (
    "fmt"
    "reflect"
)

type Test struct{
    foo int
}

func main() {
    t := Test{5}
    fmt.Println(reflect.TypeOf(t) == reflect.TypeOf(Test{}))
}

Solution

Type assertions:

package main

import "fmt"

type Test struct {
    foo int
}

func isTest(t interface{}) bool {
    switch t.(type) {
    case Test:
        return true
    default:
        return false
    }
}

func main() {
    t := Test{5}
    fmt.Println(isTest(t))
}

Playground


And, more simplified:

_, isTest := v.(Test)

Playground


You can refer to the language specification for a technical explanation.

Answered By – Emile Pels

Answer Checked By – Clifford M. (GoLangFix Volunteer)

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