Extract FIELD names of a struct and put them in a slice of strings

Question

I want to be able to extract the FIELD names (not the values) of a struct as strings, put them in a slice of strings and then use the names to print in a menu in Raylib (a graphics library for Go) elsewhere in a program. That way if I change the fields in the struct the menu will update automatically without having to go back and manually edit it. So, if you take a look at the struct below, I want to extract the names MOVING, SOLID, OUTLINE etc. not the boolean value. Is there a way to do this?

type genatt struc {
    moving, solid, outline, gradient, rotating bool
}

Answer 1

You may use reflection (reflect package) to do this. Acquire the reflect.Type descriptor of the struct value, and use Type.Field() to access the fields.

For example:

t := reflect.TypeOf(genatt{})

names := make([]string, t.NumField())
for i := range names {
    names[i] = t.Field(i).Name
}

fmt.Println(names)

This will output (try it on the Go Playground):

[moving solid outline gradient rotating]

See related questions:

How to get all Fields names in golang proto generated complex structs

How to sort struct fields in alphabetical order

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