[Issue 11988] Add __switch symbol to allow retrieval of switch statement value

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=11988


yebblies <yebblies at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |yebblies at gmail.com


--- Comment #3 from yebblies <yebblies at gmail.com> 2014-01-25 13:12:50 EST ---
(In reply to comment #2)
> (In reply to comment #1)
> > Why don't we just allow `auto var = <expression>`, like in an if-statement?
> 
> Because they would have different semantics. The if statement's body is not
> entered when the expression implicitly converts to false, e.g.:
> 
> [snip]
> 
> So you'd end up with different semantics.

Who would expect 'if' and 'switch' to have the same semantics?

I don't think this is worth adding a magic symbol (nested switch statements?)
but switch(auto a = b) solves this quite nicely.

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