Struct の fileprivate / private の違い

AccessScope.swift

struct Hoge {
    fileprivate var hoge = 0
}
struct Fuga {
    private var fuga = 0
}

var hoge = Hoge()
hoge.hoge = 2
print(hoge.hoge)
// # => 2

var fuga = Fuga()
fuga.fuga = 2
// Compile error: 'fuga' is inaccessible due to 'private' protection level