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SiarheiFedartsou/visitor_usage.swift

Created December 4, 2017 17:46
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visitor_usage.swift
let rectangle = Rectangle(width: 42, height: 42)
let circle = Circle(radius: 42)
let squareVisitor = SquareShapeVisitor()
rectangle.accept(squareVisitor)
print(squareVisitor.square) // 1764.0
circle.accept(squareVisitor)
print(squareVisitor.square) // 5541.77
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