Let default value

let-default-value.swift

/**
 + less boilerplate
 + default initializer
 - you can alter `limit`
 */
struct MyRequestInput1 {
    let searchTerm: String
    var limit: Int = 10
}

_ = MyRequestInput1(searchTerm: "foo")
_ = MyRequestInput1(searchTerm: "foo", limit: 20)

/**
 + you can't alter `limit`
 + default initializer
 - boilerplate
 */
struct MyRequestInput2 {
    let searchTerm: String
    let limit: Int

    init(searchTerm: String, limit: Int = 10) {
        self.searchTerm = searchTerm
        self.limit = limit
    }
}

_ = MyRequestInput2(searchTerm: "foo")
_ = MyRequestInput2(searchTerm: "foo", limit: 20)

/**
 + you can't alter `limit` outside of the file
 + default initializer
 + less boilerplate
 - potentially less clear than `let`
 */
struct MyRequestInput3 {
    let searchTerm: String
    private(set) var limit: Int = 10
}

_ = MyRequestInput3(searchTerm: "foo")
_ = MyRequestInput3(searchTerm: "foo", limit: 20)