https://issues.dlang.org/show_bug.cgi?id=15899

          Issue ID: 15899
           Summary: Tuple.toString not recognized as a function with
                    isSomeFunction
           Product: D
           Version: D2
          Hardware: x86_64
                OS: Linux
            Status: NEW
          Severity: regression
          Priority: P1
         Component: phobos
          Assignee: nobody@puremagic.com
          Reporter: edder@tkwsping.nl

According to the documentation Tuple.toString should be a function, but is not recognized as such. The assert below fails:

void main()
{
    import std.traits : isSomeFunction;
    import std.typecons : Tuple;
    static assert(isSomeFunction!(Tuple!(int)(0).toString));
}

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