Struct as a variable?

#1

I am trying to set structs dynamically by a variable. Is this possible?

package main

import "fmt"

type Vertex struct {
	X int
	Y int
}

struct :="Vertex"

func main() {
	fmt.Println(struct{1, 2})
}

TIA!

#2

What exactly you are trying to do? Type above is Vertex, not struct:

fmt.Println(Vertex{1, 2})

#3

I am trying to fetch structs using a dynamic variable.

#4

Maybe implement a factory or something could be a better idea or do something like

package main

import (
	"fmt"
)

type Vertex struct {
	X int
	Y int
}

func toStruct(st string) interface{} {
	if st == "Vertex" {
		return Vertex{}
	}
	return nil

}

func main() {
	s := "Vertex"
	st := toStruct(s)
	fmt.Printf("%T", st)
	//fmt.Println(s{1, 2})
}
#5

In general, such a thing is not possible, as you might pass in a struct value that would lead to a struct with a different set of fields. Though creation of struct literals has to be decidable at compiletime.

#6

I do not think I can pass text and get a struct. Or have I missed something?

https://play.golang.org/p/nMj9rG-QD3O

#7

“general” sounds to me that there is a tiny chance?

#8

Not in gos typesystem, except for using a dispatch mechanism as described by @Yamil_Bracho.

#9

This topic was automatically closed 90 days after the last reply. New replies are no longer allowed.