What is the mechanism of structure operation during copying?

Structures in Swift are value types. When copied, the structure is fully duplicated, creating an independent copy.

// Structure declaration
struct Point {
    var x: Int
    var y: Int
}

// Creating an instance of the structure
var origin = Point(x: 0, y: 0)

// Copying the structure - a new instance newData is created
var newData = origin

// Changing newData does not affect origin
newData.x = 10

// origin.x is still 0
// newData.x is now 10

This means that each change to a copy of the structure does not affect the original, and vice versa. Memory for the new copy is allocated separately.

Unlike structures, classes are reference types, and copying only passes a reference to the same object in memory.