Swift tuples (all sequence/collection literals and anywhere else with a comma-delimited list) should allow commas after last items

Originator:isaac.greenspan
Number:rdar://21894075 Date Originated:19-Jul-2015 10:05 PM
Status:Closed (dupe of 17260244) Resolved:
Product:Developer Tools Product Version:
Classification:UI/Usability Reproducible:Not Applicable
 
Summary:
Any place in Swift where there’s a comma-delimited list should allow a comma after the last item.

Steps to Reproduce:
In Xcode 6.4/Swift 1.2 as well as Xcode 7b3/Swift 2.0, entering:
var goatTuple = ( "🐐", "🐐", "🐐" )
works while 
var goatTuple = ( "🐐", "🐐", "🐐", )
produces an error.

Expected Results:
Both above examples should work.  Commas after last items in any comma-delimited list should not produce errors.

Actual Results:
Commas after last items in at least some instances of comma-delimited lists (tuples) produce errors.  I haven’t checked to see whether trailing commas like this are permitted anywhere.

Comments


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