How can you create a contract within a contract and pass the value / payable amount?

Question

I want to create another contract in a contract function call and pass the associated ether into that new contract. Seems like it makes sense to want to do but...

Why doesn't this work?

contract B {
    uint x;
    function B(uint a) payable {
        x = a;
    }
}


contract A {
    function createAndPassAmount(uint arg, uint amount) payable {
        B newD = new B.value(amount)(arg);
    }
}

Answer 1

You need parentheses around new B (see below):

contract A {
    function createAndPassAmount(uint arg, uint amount) payable {
        B newD = (new B).value(amount)(arg);
    }
}