[Issue 8998] New: 'inout pure' returns immutable, which in reality is mutable

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=8998

           Summary: 'inout pure' returns immutable, which in reality is
                    mutable
           Product: D
           Version: D2
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: normal
          Priority: P3
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: acehreli at yahoo.com


--- Comment #0 from Ali Cehreli <acehreli at yahoo.com> 2012-11-11 15:25:20 PST ---
class A
{
    int i;
}

class C
{
    A a;

    this()
    {
        a = new A();
    }

    // WRONG: Returns immutable(A)
    immutable(A) get() inout pure
    {
        return a;
    }
}

void main()
{
    auto c = new C;

    immutable(A) imm_a = c.get();
    assert(imm_a.i == 0);

    c.a.i = 100;              // <-- changes immutable(A)
    assert(imm_a.i == 100);   // <-- Oops!
}

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