Wrong lowering for a[b][c]++

[Andrej Mitrovic]

> On 3/22/12, H. S. Teoh <hsteoh at quickfur.ath.cx> wrote:
> snip

Hmm, what about (temporary) compatibility with hash literals? You
could add the following to the newAA module:

static import std.traits;
template KeyType(V : V[K], K)
{
    alias K KeyType;
}

template ValueType(V : V[K], K)
{
    alias V ValueType;
}

and in the AssociativeArray struct:
void opAssign(AA)(AA aa)
    if (std.traits.isAssociativeArray!AA
        && is(KeyType!AA == keytype)
        && is(ValueType!AA == valuetype))
{
    foreach (key, val; aa)
        this[key] = val;
}

Then this will work:

AA!(int, string) intToStr;
intToStr = [1:"foo"];
assert(intToStr[1] == "foo");

Otherwise it will be pretty hard to test the new hashes without
changing a significant amount of code.