Swift Prog. Language: In an if statement, the conditional must be a Boolean expression is incorrect

Originator:mc
Number:rdar://17358576 Date Originated:2014-06-18
Status:Closed Resolved:
Product:Documentation Product Version:
Classification:Other Bug Reproducible:Always
 
var optionalString: String? = nil

if optionalString {
    "non nil"
} else {
    "nil"
} Will output "nil".

if optionalString isn't a Boolean expression. One could argue about that, but I think of a Boolean expression more as == true or == false,

Comments

Apple Developer Relations

Engineering has determined that this issue behaves as intended based on the following:

The full answer is that it can be any data type that conforms to the LogicValue protocol, as discussed in the Reference (link below). That's too much detail for the guided tour though.

https://developer.apple.com/library/prerelease/mac/documentation/Swift/Conceptual/Swift_Programming_Language/Statements.html#//apple_ref/doc/uid/TP40014097-CH33-XID_915

We are now closing this bug report.

If you have questions regarding the resolution of this issue, please update your bug report with that information.

Please be sure to regularly check new Apple releases for any updates that might affect this issue.

By mc at July 11, 2014, 3:04 p.m. (reply...)

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