[swift-evolution] Obsoleting `if let`

[Chris Lattner]

> On Feb 3, 2016, at 10:23 PM, Brent Royal-Gordon via swift-evolution <swift-evolution at swift.org> wrote:
> 
>> The original proposal says 
>> 
>> 	if let name? = optionalCondition { }
>> 
>> This would unwrap it? 
>> 
>> This seems like it should be mean the opposite.
> 
> The reason it unwraps it is that the thing on the left is a pattern, kind of like the cases of a case statement:

Right.  This makes sense to you, it makes sense to me, but it doesn’t make sense to most people using Swift.  More specifically, you can get a *long* way in Swift without understanding the depth of how pattern matching works in Swift, but if/let is inescapable.

-Chris