[Issue 12031] New: Possible dollar handling inconsistencies in std.typecons.Typedef array

[d-bugmail at puremagic.com]

https://d.puremagic.com/issues/show_bug.cgi?id=12031

           Summary: Possible dollar handling inconsistencies in
                    std.typecons.Typedef array
           Product: D
           Version: D2
          Platform: x86
        OS/Version: Windows
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Phobos
        AssignedTo: nobody at puremagic.com
        ReportedBy: bearophile_hugs at eml.cc


--- Comment #0 from bearophile_hugs at eml.cc 2014-01-29 08:28:51 PST ---
I am not sure, but perhaps this code shows some inconsistencies:


import std.typecons: Typedef;
ubyte[4] foo1() {
    ubyte[25] a;
    return a[$ - 4 .. $]; // OK
}
ubyte[4] foo2() {
    Typedef!(ubyte[25]) a;
    return a[$ - 4 .. $]; // Error
}
ubyte[4] foo3() {
    Typedef!(ubyte[25]) a;
    return a[a.length - 4 .. a.length]; // Error
}
ubyte[4] foo4() {
    Typedef!(ubyte[25]) a;
    typeof(return) result;
    result[] = a[a.length - 4 .. a.length]; // OK
    return result;
}
void main() {}


dmd 2.065beta gives:

test.d(8): Error: undefined identifier __dollar
test.d(8): Error: undefined identifier __dollar
test.d(12): Error: cannot implicitly convert expression (a.opSlice(21u, 25u))
of type ubyte[] to ubyte[4]

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