[Go] Simulating default parameters with structs

package main

import (
    "log"
)

type Color int

const (
    White Color = iota
    Black
    Green
    Yellow
)

type Size int

const (
    Large Size = iota
    Middle
    Small
    ExtraLarge
)

type Clothes struct {
    color Color
    size  Size
}

type Param struct {
    Color Color
    Size  Size
}

func MakeClothes(param Param) *Clothes {
    c := new(Clothes)

    c.color = param.Color
    c.size = param.Size

    return c
}

func main() {
    // Clothes with custom parameters
    c1 := MakeClothes(Param{Color: Black, Size: Middle})

    if !(c1.color == Black) {
        log.Fatal("Wrong color")
    }

    if !(c1.size == Middle) {
        log.Fatal("Wrong size")
    }

    // Clothes with default parameters
    c2 := MakeClothes(Param{})

    if !(c2.color == White) {
        log.Fatal("Wrong color")
    }

    if !(c2.size == Large) {
        log.Fatal("Wrong size")
    }
}