private IProduct BuildCombination(ParseTreeNode leftNode, ParseTreeNode rightNode, string op, object[,] bag)
{
ICouponDecomposable left = BuildProduct(leftNode, bag) as ICouponDecomposable;
ICouponDecomposable right = BuildProduct(rightNode, bag) as ICouponDecomposable;
switch (op)
{
case "+":
return(DecomposableLinearCombination.Create(new[] { 1.0, 1.0 }, new[] { left, right }));
case "-":
return(DecomposableLinearCombination.Create(new[] { 1.0, -1.0 }, new[] { left, right }));
default:
throw new Exception("BUG should never get there !");
}
}
private IProduct BuildWeighted(double weight, ParseTreeNode factorProductNode, object[,] bag)
{
var factor = BuildProduct(factorProductNode, bag) as ICouponDecomposable;
return(DecomposableLinearCombination.Create(new[] { weight }, new[] { factor }));
}