🔰fully qualified name

Swift ⟩ basic types ⟩ function ⟩ fully qualified name

    add(a: 1, b: 2)    // normal call
    add(a:b:)(1, 2)    // ⭐️ fully qualified function name
//  ^^^^^^^^^

💈範例

• replit：fully qualified function name

// add()
@discardableResult
func add(a: Int, b: Int) -> Int {
    let result = a + b
    print(result)
    return result
}

// ⭐️ assign `add` to variable `add2`
let add2 =   add
//        ╰──F.E.──╯  (⭐️ F.E.: function expression)

let _ = add2(5, 6)      // 11
//  ⭡
//  to silence the compiler warning:
//  ⚠️ warning: result of call to function returning 'Int' is unused
// ---------------------------------------------------------------------
//
// ⭐️ Note: 
//    despite the presence of `@discardableResult`,
//    the warning about `add2()` call is NOT silenced❗

// ---------------------------------
// ⭐️ fully qualified function name
// ---------------------------------
    add(a: 1, b: 2)    // 3
    add(a:b:)(1, 2)    // 3
//  ^^^^^^^^^
//  ✅ this is OK.

// ---------------------------------------------------------------------
    add2(a:b:)(1, 2)   
//  ^^^^^^^^^^
//  ⛔ error: use of unresolved identifier 'add2(a:b:)'
// ---------------------------------------------------------------------

🗣 討論

• Swift forums ⟩

  • Getting the (more) fully qualified name of a type

  • Pitch: Fully qualified name syntax