Prevent using the initializer with default parameter for optional values
There's no way to prevent it today, but maybe when Swift supports macros or constant expressions.
I have seen many users do:
static let interval = Key<Double?>("interval", default: nil)The default parameter is moot in this case.
Or even worse:
static let interval = Key<Double?>("interval", default: 4)Which has the incorrect behavior by never allowing the value to be set to nil. (The correct solution to this is #54)
sindresorhus / Defaults
💾 Swifty and modern UserDefaults
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