[Issue 8833] New: Odd error with expression tuples

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8833

           Summary: Odd error with expression tuples
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: andrej.mitrovich at gmail.com


--- Comment #0 from Andrej Mitrovic <andrej.mitrovich at gmail.com> 2012-10-16 20:12:56 PDT ---
import std.typetuple;

void func(alias arg)() { }

void main()
{
    int x, y;

    alias TypeTuple!(
        func!(x),
        func!(y),
    ) Map;
}

test.d(9): Error: template instance TypeTuple!(func,func) TypeTuple!(func,func)
is nested in both func!(x) and func!(y)

But this works fine (notice 'y' isn't passed here):

void main()
{
    int x, y;

    alias TypeTuple!(
        func!(x),
        func!(x),
    ) Map;
}

This was while trying to implement an interesting question on SO:
http://stackoverflow.com/questions/12888263/mapping-variadic-template-arguments-in-d

That solution is partially implementable by constructing function call
expressions, however I can never get around this strange bug.

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