(Flat)Mappable Boolean

If.swift

import Foundation

public struct If {
    let ifTrue: Optional<Void>

    public init(_ condition: @autoclosure () -> Bool) {
        self.ifTrue = condition() ? .some(()) : .none
    }

    public func map<T>(_ transform: () -> T) -> T? {
        ifTrue.map(transform)
    }

    public func flatMap<T>(_ transform: () -> T?) -> T? {
        ifTrue.flatMap(transform)
    }
}