[swift-evolution] guard let x = x

[Tino Heth]

Imho it would be better not to add "uwrap".
Yes, it might be nicer in some situations, but it is also nice to have a simple (or at least less complicated) language.
For me, the actual benefit is to low to justify a separate keyword which creates questions that don't exist with the current syntax.
It is quite clear that "if let" declares a new value, whereas "unwrap" introduces ambiguity.

Have a look at this line:
if unwrap someObject.someFunction() { print("?") }
Should the compiler accept it?
If yes: Should it be possible to access the return value of someFunction? How?
If no: What about "someObject.someComputedProperty"? What if you exchange "someObject" with "self"?

What if I want to modify an unwrapped value? "if var" is quite intuitive, but unwrap… maybe it depends on the original value, or is there a second variant?

There might be good answers for all those questions, but they aren't obvious.
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