const variables? about lua-intf

[krisr]

Actually, I was able to create a patch that fixes the issues with const non-ref variable primitives. I'll create a PR for your review in case you are interested. I'm sure there is more work required for non-primitives which I can probably handle as well.

[krisr]

Here's the commit I'm working on in case you have any design feedback:
krisr@38423f4

It's a little awkward because of the writeable property. I removed it entirely, but that makes the API a little more confusing and less discoverable. Perhaps it would be better to leave it for the const version and assert, or move the specialization for const further up the stack into LuaValue or something.

[SteveKChiu]

Wouldn't it be simpler by adding:

    /**
     * Add or replace a const data member.
     */
    template <typename V>
    CppBindClass<T>& addVariable(const char* name, const V T::* v)
    {
        setMemberGetter(name, LuaRef::createFunction(state(), &CppBindClassVariable<T, V>::get, const_cast<V T::*>(v)));
        setMemberReadOnly(name);
        return *this;
    }

[krisr]

That looks better. I'll give it a try.