protected override Expression VisitSum(Sum A)
{
List <Expression> terms = new List <Expression>();
foreach (Expression i in A.Terms)
{
terms.Add(Visit(i));
}
return(EvaluateVisitor.EvaluateSum(terms));
}
// Evaluate x*A, distributing x if A is Add.
public static Expression Distribute(Expression x, Expression A)
{
if (A is Sum || x is Sum)
{
return(EvaluateVisitor.EvaluateSum(Sum.TermsOf(A).SelectMany(i => Sum.TermsOf(Distribute(i, x)))));
}
else
{
return(Product.New(A, x).Evaluate());
}
}
public static IEnumerable <Expression> Evaluate(this IEnumerable <Expression> f, IDictionary <Expression, Expression> x0)
{
EvaluateVisitor V = new EvaluateVisitor();
return(f.Select(i => V.Visit(i.Substitute(x0))));
}
public static IEnumerable<Expression> Evaluate(this IEnumerable<Expression> f, IDictionary<Expression, Expression> x0)
{
EvaluateVisitor V = new EvaluateVisitor();
return f.Select(i => V.Visit(i.Substitute(x0)));
}