golang set value on time.Time

Question

package main

import (
    "fmt"
    "reflect"
)

func main() {
    type t struct {
        N int
    }
    var n = t{42}
    fmt.Println(n.N)
    reflect.ValueOf(&n).Elem().FieldByName("N").SetInt(7)
    fmt.Println(n.N)
}

The prog below works the question is how do I do this with time.Time type like

package main

import (
    "fmt"
    "reflect"
    "time"
)

func main() {
    type t struct {
        N time.Time
    }
    var n = t{ time.Now() }
    fmt.Println(n.N)
    reflect.ValueOf(&n).Elem().FieldByName("N"). (what func)   (SetInt(7) is only for int)         // there is not SetTime
    fmt.Println(n.N)
}

This is important because I plan to use it on generic struct

I really appreciate your help on this

Answer 1

Simply call Set() with a reflect.Value of the time you want to set:

package main

import (
    "fmt"
    "reflect"
    "time"
)

func main() {
        type t struct {
                N time.Time
        }
        var n = t{time.Now()}
        fmt.Println(n.N)

        //create a timestamp in the future
        ft := time.Now().Add(time.Second*3600)

        //set with reflection
        reflect.ValueOf(&n).Elem().FieldByName("N").Set(reflect.ValueOf(ft))

        fmt.Println(n.N)
}