public CTerIfExpr(Expr left, Expr right) : base("?", left, right)
{
CTerElseExpr = right as CTerElseExpr;
if (CTerElseExpr == null)
{
throw new ArgumentException($"Type of {nameof(right)} excepted to be {nameof(CTerElseExpr)} but is {right.GetType().FullName}");
}
}
public static Expr FormCTerExpr(Expr left, Expr right)
{
if (!(right is CTerElseExpr pivot && pivot.Right is CTerElseExpr pivotChild))
{
return(new CTerIfExpr(left, right));
}
var c = new CTerElseExpr(pivot.Left, pivotChild.Left);
return(new CTerElseExpr(new CTerIfExpr(left, c), pivotChild.Right));
}