[lang-ref] ( struct_instance_method_mutating ) ( swift )

@Test func structInstanceMethodMutating() {
	struct Struct01 {
		var member01: Int
		var member02: Int

		mutating func multiply(with scale: Int) {
			member01 *= scale
			member02 *= scale
		}
	}

	var s = Struct01(member01: 3, member02: 5)
	s.multiply(with: 2)

	#expect(s.member01 == 6)
	#expect(s.member02 == 10)
}