private void Evaluate(Token e)
{
double? result = null;
string info = string.Empty;
try
{
result = evaluator.Evaluate(e);
InputEntry.Text = result.ToString();
InputEntry.SelectionStart = InputEntry.Text.Length;
InputEntry.SelectionLength = 0;
}
catch (EvaluationException ex)
{
info = ex.Message;
}
catch (Exception)
{
info = "Could not evaluate the expression due to an unknown problem";
}
viewModel.History.Insert(0,
new LogModel
{
Expression = e,
RawExpression = e.ToString(),
Result = result,
Info = info,
InfoColor = new SolidColorBrush(Windows.UI.Colors.LightGray)
});
RefreshVariables();
}
public EvaluationException(string message, Token expression)
: base(message)
{
Expression = expression;
}
/// <summary>
/// Evaluates the specified expression using this object's data.
/// </summary>
/// <param name='e'>
/// The expression to evaluate.
/// </param>
/// <returns>
/// The result of the evaluated expression.
/// </returns>
public double Evaluate(Token e)
{
double ans = e.Evaluate(this);
Variables["ans"] = ans;
return ans;
}
