Add an implicit return nil if function reaches end before return explicitly called

[mirkokg (Mirko)]

@anon9791410 I wasn't sure about official stance either, but I started a new thread anyway (as suggested by @Jon_Shier and @xwu) as an evolution pitch here:

[Pitch] Implicit `return nil` for Closures with optional return type

Implicit "return nil" for Closures with an optional return type. Introduction We propose adding implicit return nil when Closure has optional return type and no other return statement is executed. Motivation As an example, check the following computed property: var roleAndCompany: String? { if let role, let company { return "\(role) @ \(company)" } else if let role { return role } else if let company { return "@ \(company)" …

Lets continue discussion about my proposal there. Thanks!