type MyInt = int

struct Bb {
mut:
    a int
    b struct {}

pub:
    c ?string
    d map[string]int
    e atomic int
pub mut:
    f   []f64
    zzz MyInt = 123
}

fn foo[U](val U) {
    $for field in U.fields {
        println('field: ${field.name}')

        $if field.is_pub == true {
            println(field.name + ' is pub?: ${field.is_pub}')
        }
        $if field.is_mut {
            println(field.name + ' is mut?: ${field.is_mut}')
        }
        $if field.is_struct {
            println(field.name + ' is struct?: ${field.is_struct}')
        }
        $if field.is_chan {
            println(field.name + ' is chan?: ${field.is_chan}')
        }
        $if field.is_array {
            println(field.name + ' is array?: ${field.is_array}')
        }
        $if field.is_map {
            println(field.name + ' is map?: ${field.is_map}')
        }
        $if field.is_alias {
            println(field.name + ' is alias?: ${field.is_alias}')
        }
        $if field.is_shared {
            println(field.name + ' is shared?: ${field.is_shared}')
        }
        $if field.is_option {
            println(field.name + ' is option?: ${field.is_option}')
        }
        $if field.is_atomic {
            println(field.name + ' is atomic?: ${field.is_atomic}')
        }
    }
}

fn main() {
    bb := Bb{}
    foo(bb)
}