Converting a custom type to string in Go

Question

In this bizarre example, someone has created a new type which is really just a string:

type CustomType string

const (
        Foobar CustomType = \"somestr         


        

Answer 1

Better to define a String function for the Customtype - it can make your life easier over time - you have better control over things as and if the structure evolves. If you really need SomeFunction then let it return Foobar.String()

   package main

    import (
        "fmt"
    )

    type CustomType string

    const (
        Foobar CustomType = "somestring"
    )

    func main() {
        fmt.Println("Hello, playground", Foobar)
        fmt.Printf("%s", Foobar)
        fmt.Println("\n\n")
        fmt.Println(SomeFunction())
    }

    func (c CustomType) String() string {
        fmt.Println("Executing String() for CustomType!")
        return string(c)
    }

    func SomeFunction() string {
        return Foobar.String()
    }

https://play.golang.org/p/jMKMcQjQj3