// Package a.go
package a

type Shape struct {
	Length int
	Width  int

	volume    int
	Perimeter int `exhaustruct:"optional"`
}

// valid
var a Shape = Shape{
	Length: 5,
	Width:  3,
	volume: 5,
}

// invalid, `volume` is missing
var b Shape = Shape{
	Length: 5,
	Width:  3,
}

// Package b.go
package b

import "a"

// valid
var b Shape = a.Shape{
	Length: 5,
	Width:  3,
}

// invalid, `Width` is missing
var b Shape = a.Shape{
	Length: 5,
}