[Issue 10840] New: [CTFE] *this._data.arr is not yet implemented at compile time

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=10840

           Summary: [CTFE] *this._data.arr is not yet implemented at
                    compile time
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: dmitry.olsh at gmail.com


--- Comment #0 from Dmitry Olshansky <dmitry.olsh at gmail.com> 2013-08-17 14:54:39 PDT ---
Found while working on std.regex. std.array.Append will sometimes fail with
that message.

Simpified test case:

bool empty(int[] arr)
{
    return arr.length == 0;
}

struct Appender
{
    private struct Data
    {
        size_t capacity;
        int[] arr;
    }

    private Data* _data;

    @property int[] data()  @trusted pure nothrow
    {
        return (_data ? _data.arr : null);
    }
}

struct Stack
{
    Appender stack;  
    @property bool empty(){ return stack.data.empty; }
}


bool foo()
{
    Stack app;
    return app.empty;
}


pragma(msg, foo());

Outputs (tested with git HEAD 2.064):

ctfe_fail.d(18): Error: *this._data.arr is not yet implemented at compile time
ctfe_fail.d(25):        called from here: this.stack.data()
ctfe_fail.d(25):        called from here: empty(this.stack.data())
ctfe_fail.d(32):        called from here: app.empty()
ctfe_fail.d(36):        called from here: foo()
ctfe_fail.d(36):        while evaluating pragma(msg, foo())

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