[Issue 3916] New: opEquals for objects does not respect const

[d-bugmail at puremagic.com]

http://d.puremagic.com/issues/show_bug.cgi?id=3916

           Summary: opEquals for objects does not respect const
           Product: D
           Version: 2.041
          Platform: Other
        OS/Version: All
            Status: NEW
          Severity: major
          Priority: P2
         Component: DMD
        AssignedTo: nobody at puremagic.com
        ReportedBy: schveiguy at yahoo.com


--- Comment #0 from Steven Schveighoffer <schveiguy at yahoo.com> 2010-03-09 11:54:35 PST ---
Example:

class C
{
    int x;
    bool opEquals(Object d) {++x; return false;}
}

void main()
{
    const c1= new C;
    const c2= new C;
    assert(c1 != c2);
    assert(c1.x == 1);
}

This should fail to compile.  I'm unsure what the correct signature for
opEquals should be, but I'd expect it to be something like:

bool opEquals(const Object other) const;

With the global function being changed to:

bool opEquals(const Object lhs, const Object rhs);

This may limit the ability to run cached calculations in the objects themselves
during comparisons, but I think this situation could be worked around with
casts.

-- 
Configure issuemail: http://d.puremagic.com/issues/userprefs.cgi?tab=email
------- You are receiving this mail because: -------