// vtest vflags: -autofree
struct Item {
    name string
    tags []string
}

fn process[T](val T) string {
    mut result := ''
    $for field in T.fields {
        $if field.unaliased_typ is string {
            name := val.$(field.name)
            result += name
        } $else $if field.unaliased_typ is []string {
            arr := val.$(field.name)
            for tag in arr {
                result += tag
            }
        }
    }
    return result
}

fn main() {
    item := Item{
        name: 'test'
        tags: ['a', 'b', 'c']
    }
    assert process(item) == 'testabc'
    assert item.name == 'test'
    assert item.tags == ['a', 'b', 'c']
    println('ok')
}