After fumbling for several days and firing a related bug(https://bugs.swift.org/browse/SR-435) I finally submitted the pull request: https://github.com/apple/swift/pull/854.
Thanks for your help! > On Dec 31, 2015, at 3:49 PM, Dmitri Gribenko <griboz...@gmail.com> wrote: > > On Thu, Dec 31, 2015 at 10:06 PM, Ling Wang <an0...@gmail.com > <mailto:an0...@gmail.com>> wrote: >> Do you mean something like this in >> validation-test/stdlib/SequenceType.swift.gyb: >> >> SequenceTypeTests.test("Range<Element>.contains/WhereElementIsComparable/dispatch") >> { >> MinimalComparableValue.timesLessWasCalled = 0 >> let start = 0 >> let end = 10 >> let range = Range(start: MinimalComparableValue(start), end: >> MinimalComparableValue(end)) >> let count = 20 >> for test in 0...count { >> expectEqual( >> test >= start && test < end, >> range.contains(MinimalComparableValue(test))) >> } >> expectEqual( >> count * 2, MinimalComparableValue.timesLessWasCalled) >> } > > Yes, this would be good. > >> There is one issue. MinimalComparableValue doesn’t conform to >> ForwardIndexType. I’m not sure it is proper for me to add this conformance >> in an extension because the definition of MinimalComparableValue is “A type >> that conforms only to `Equatable` and `Comparable`”. >> >> What’s your suggestion? > > I think it would be appropriate to define a special type like > MinimalComparableValue just for this test since the requirements are > quite specific (Comparable + ForwardIndexType). > > Dmitri > > -- > main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if > (j){printf("%d\n",i);}}} /*Dmitri Gribenko <griboz...@gmail.com > <mailto:griboz...@gmail.com>>*/
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