/// <summary>
/// Evaluates the given constant attribute expression to a list of integer values.
/// </summary>
/// <param name="expression">The expression to be evaluated.</param>
/// <returns>The list of integer values.</returns>
public IList<int?> EvaluateConstant(string expression)
{
EnterContext(); // hide symbols so we only see constants
MultipleExpressionEvaluator evaluator = new MultipleExpressionEvaluator(this, expression);
IList<object> result = evaluator.Evaluate();
ExitContext();
IList<int?> intResult = new List<int?>();
foreach (object s in result)
{
intResult.Add(s as int?);
}
return intResult;
}
/// <summary>
/// Evaluates the given attribute expression to a set of integer value by using the current
/// context for symbol resolution.
/// </summary>
/// <param name="expression">The expression to be evaluated.</param>
/// <returns>The value list for the expression.</returns>
public IList<int?> EvaluateMultipleExpressions(string expression)
{
MultipleExpressionEvaluator evaluator = new MultipleExpressionEvaluator(this, expression);
IList<object> result = evaluator.Evaluate();
if (result.Count == 0)
TestAssertFail("expected at least one expression in attribute '{0}'", expression);
IList<int?> intResult = new List<int?>();
foreach (object s in result)
{
intResult.Add(s as int?);
}
return intResult;
}
/// <summary>
/// Evaluates the given attribute expression to an integer value by using the current
/// context for symbol resolution.
/// </summary>
/// <param name="expression">The expression to be evaluated.</param>
/// <returns>The value for the expression.</returns>
public int Evaluate(string expression)
{
MultipleExpressionEvaluator evaluator = new MultipleExpressionEvaluator(this, expression);
IList<object> result = evaluator.Evaluate();
if (result.Count != 1 || result[0] == null)
TestAssertFail("expected exactly one expression in attribute '{0}'", expression);
return (int)result[0];
}