[Issue 6798] New: Integrate overloadings for multidimentional indexing and slicing

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=6798

           Summary: Integrate overloadings for multidimentional indexing
                    and slicing
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: k.hara.pg at gmail.com


--- Comment #0 from Kenji Hara <k.hara.pg at gmail.com> 2011-10-09 17:34:56 PDT ---
The following replacement has been proposed by issue 3474.

x[$-2, y[$-6, $-9], $-2]
// is translated to
// x.opIndex(x.opDollar!0 - 2,
//           y.opIndex(y.opDollar!0 - 6, y.opDollar!1 - 9),
//           x.opDollar!2 - 2)

Similarly, I propose the following replacement for the overloading mixture of
indexing and slicing.

x[2..$, $-1, y[$-6, 0..$]]
// is translated to
// x.opIndex(x.opSlice!0(2, x.opDollar!0),
//           x.opDollar!1 - 1,
//           y.opIndex(y.opDollar!0 - 6, y.opSlice!1(0, y.opDollar!1)))

And additionally, I propose to merge slicing into indexing.

x[]
// is translated to
// x.opIndex()

After all, the indexing and slicing getter will be translated to
x.opIndex(...), and the setter will be translated to x.opIndexAssign(value,
...).
And also, opSlice and opSliceAssign would be unnecessary.

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