/// <summary>
/// Gets all available (not in the brackets) functions.
/// </summary>
/// <param name="expression">The expression to get all variable functions there</param>
/// <param name="intervals">List of intervals, where functions are not available</param>
/// <returns>List of standard functions instances</returns>
public List <StandardFunction> GetStandardFunctions(string expression, List <Interval> intervals)
{
List <StandardFunction> standardFunctions = new List <StandardFunction>();
foreach (string function in StandardFunction.WellKnownFunctions)
{
List <int> funcIndexes = ExpressionParsingHelpers.GetAllSubstringIndexes(expression, function);
foreach (int idx in funcIndexes)
{
if (!Interval.BelongsToIntevals(idx, intervals))
{
standardFunctions.Add(new StandardFunction(idx, function));
}
}
}
return(standardFunctions);
}
public void IntervalBelongsToIntevalsTest()
{
List <Interval> intervals = new List <Interval>
{
new Interval(0, 3),
new Interval(10, 14)
};
int[] idxsInInervals = new int[] { 0, 1, 3, 10, 11, 14 };
int[] idxsOutIntervals = new int[] { -1, 4, 7, 15 };
foreach (int idx in idxsInInervals)
{
Assert.AreEqual(true, Interval.BelongsToIntevals(idx, intervals));
}
foreach (int idx in idxsOutIntervals)
{
Assert.AreEqual(false, Interval.BelongsToIntevals(idx, intervals));
}
}