「Swift」ジェネリクス（generics）のサンプル
サンプルコード
// 変数交換の変数
func swapToFunc(_ a: inout Int, _ b: inout Int) {
let tmp = a
a = b
b = tmp
}
var cftA = 100
var cftB = 200
print("before data: \(cftA) and \(cftB)")
swapToFunc(&cftA, &cftB)
print("after data: \(cftA) and \(cftB)")
// 変数交換の変数
func swapToFunc(_ a: inout Int, _ b: inout Int) {
let tmp = a
a = b
b = tmp
}
var cftA = 100
var cftB = 200
print("before data: \(cftA) and \(cftB)")
swapToFunc(&cftA, &cftB)
print("after data: \(cftA) and \(cftB)")
// 変数交換の変数
func swapToFunc(_ a: inout Int, _ b: inout Int) {
let tmp = a
a = b
b = tmp
}
var cftA = 100
var cftB = 200
print("before data: \(cftA) and \(cftB)")
swapToFunc(&cftA, &cftB)
print("after data: \(cftA) and \(cftB)")
実行結果
before data: 100 and 200
after data: 200 and 100