Added IrTypeFunction and IrTypeDelegate and eliminated IrDType. This means the Type::ir field can be removed. It's the final part needed for the move to a slightly more sane type system. Now the whole thing just needs to be cleaned up :P Added -v-cg switch, which right now just prints "codegen: module.name (module/name.d)" to stdout, this can really help figuring out where, in some complex build command, things go wrong.

module vararg3;

import tango.core.Vararg;

void func(...)
{
    assert(_arguments.length == 3);
    assert(_arguments[0] is typeid(int));
    assert(_arguments[1] is typeid(float));
    assert(_arguments[2] is typeid(long));
    assert(va_arg!(int)(_argptr) == 4);
    assert(va_arg!(float)(_argptr) == 2.5f);
    assert(va_arg!(long)(_argptr) == 42L);
}

void main()
{
    func(4, 2.5f, 42L);
}