[Issue 1339] Invariant/const-ness is broken by built-in array properties

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=1339





------- Comment #4 from 2korden at gmail.com  2009-02-19 03:27 -------
(In reply to comment #3)
> It reallocated array on increasing length. Seems valid.
> 

Yes, the length part is fine. Here is slightly modified test case:

import std.stdio;
import std.algorithm;

void main()
{
        immutable(int)[] x = [1, 5, 3, 4];
        auto y = x;

        writefln(y);
        x.sort;
        writefln(y); // immutable variable is modified!
        x.reverse;
        writefln(y);
}

Problem is that sort and reverse work in-place, thus modifying immutable
variable. It should either not compile /or/ allocate a copy. I don't like the
hidden allocations, so this should be just disallowed, imo.


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