[swift-evolution] [Review] SE-0096: Converting dynamicType from a property to an operator

[Michael Peternell]

Isn't `dynamictype` different from `sizeof` or `typeof` in that it does evaluate it's argument?

I think it's safe to write `typeof(system("rm -rf *"))` *, because `typeof` will return the static type of the expression, without evaluating it. `sizeof(44*x)` will not perform a multiplication, but will only consider the type of `44*x`, which is known at compile time (at least we know (because we need to know) how much space is reserved on the stack for that variable.)

dynamictype(expr) would be the first such keyword that does evaluate it's expression. Maybe that's the reason why the original developer designed it to look like a method?

-Michael

*) all code snippets are supplied without any warranty of any kind. code may clean your hard drive ;)

> Am 24.05.2016 um 20:17 schrieb Chris Lattner via swift-evolution <swift-evolution at swift.org>:
> 
> Hello Swift community,
> 
> The review of "SE-0096: Converting dynamicType from a property to an operator" begins now and runs through May 30. The proposal is available here:
> 
> 	https://github.com/apple/swift-evolution/blob/master/proposals/0096-dynamictype.md
> 
> Reviews are an important part of the Swift evolution process. All reviews should be sent to the swift-evolution mailing list at
> 
> 	https://lists.swift.org/mailman/listinfo/swift-evolution
> 
> or, if you would like to keep your feedback private, directly to the review manager.
> 
> What goes into a review?
> 
> The goal of the review process is to improve the proposal under review through constructive criticism and contribute to the direction of Swift. When writing your review, here are some questions you might want to answer in your review:
> 
> 	* What is your evaluation of the proposal?
> 	* Is the problem being addressed significant enough to warrant a change to Swift?
> 	* Does this proposal fit well with the feel and direction of Swift?
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> 	* How much effort did you put into your review? A glance, a quick reading, or an in-depth study?
> 
> More information about the Swift evolution process is available at
> 
> 	https://github.com/apple/swift-evolution/blob/master/process.md
> 
> Thank you,
> 
> -Chris Lattner
> Review Manager
> 
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