/// <summary>
/// It returns the leaf field number of a message hierarchy.
/// </summary>
/// <returns>
/// The leaf field number.
/// </returns>
public int GetLeafFieldNumber()
{
return(_messageExpression.GetLeafFieldNumber());
}
/// <summary>
/// Evaluates the expression when parsing a message.
/// </summary>
/// <param name="parserContext">
/// It's the parser context.
/// </param>
/// <returns>
/// A boolean value.
/// </returns>
public bool EvaluateParse(ref ParserContext parserContext)
{
return(_messageExpression.GetLeafMessage(ref parserContext,
null).Fields.Contains(_messageExpression.GetLeafFieldNumber()));
}