/// <summary>
/// Set the parameter index on the CodeExpression using
/// EvaluationData.
/// </summary>
/// <param name="toSet">CodeExpression on which to set the
/// parameter index.</param>
/// <param name="parameterIndex">Index to set.</param>
public static void SetParameterIndex(CodeObject toSet, int parameterIndex)
{
EvaluationData data = toSet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
data = new EvaluationData();
toSet.UserData.Add(typeof(EvaluationData), data);
}
data.ParameterIndex = parameterIndex;
}
/// <summary>
/// Helper method used for setting the type of
/// a CodeExpression through use of EvaluationData.
/// </summary>
/// <param name="toSet">CodeExpression to adorn with
/// type information.</param>
/// <param name="newType">Type of the CodeExpression's result.</param>
public static void SetType(CodeObject toSet, Type newType)
{
EvaluationData data = toSet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
data = new EvaluationData();
toSet.UserData.Add(typeof(EvaluationData), data);
}
data.Type = newType;
}
/// <summary>
/// Get the CodeExpression object's corresponding index
/// into the IExpressionEvaluator's parameter list using
/// EvaluationData.
/// </summary>
/// <param name="toGet">Expression for which to get the
/// parameter.</param>
/// <param name="throwIfNotExist">Whether to throw an
/// exception if the parameter cannot be found. True to
/// throw.</param>
/// <returns>The index into the parameter list for this
/// expression's replacement value.</returns>
public static int GetParameterIndex(CodeObject toGet, bool throwIfNotExist)
{
EvaluationData data = toGet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
if (throwIfNotExist)
{
throw new ApplicationException("No EvaluationData from which to extract the parameter.");
}
return(-1);
}
else
{
return(data.ParameterIndex);
}
}
/// <summary>
/// Helper method used for getting the type of
/// a CodeExpression through use of EvaluationData.
/// </summary>
/// <param name="toGet">CodeExpression which is adorned
/// with type information.</param>
/// <param name="throwIfNotExist">Whether to throw an
/// exception if the type data is not available. True to
/// throw.</param>
/// <returns>The type of the result of the CodeExpression.</returns>
public static Type GetType(CodeObject toGet, bool throwIfNotExist)
{
EvaluationData data = toGet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
if (throwIfNotExist)
{
throw new ApplicationException("The expression did not contain an EvaluationData object.");
}
return(null);
}
else
{
return(data.Type);
}
}
/// <summary>
/// Set the parameter index on the CodeExpression using
/// EvaluationData.
/// </summary>
/// <param name="toSet">CodeExpression on which to set the
/// parameter index.</param>
/// <param name="parameterIndex">Index to set.</param>
public static void SetParameterIndex(CodeObject toSet, int parameterIndex)
{
EvaluationData data = toSet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
data = new EvaluationData();
toSet.UserData.Add(typeof(EvaluationData), data);
}
data.ParameterIndex = parameterIndex;
}
/// <summary>
/// Helper method used for setting the type of
/// a CodeExpression through use of EvaluationData.
/// </summary>
/// <param name="toSet">CodeExpression to adorn with
/// type information.</param>
/// <param name="newType">Type of the CodeExpression's result.</param>
public static void SetType(CodeObject toSet, Type newType)
{
EvaluationData data = toSet.UserData[typeof(EvaluationData)] as EvaluationData;
if (data == null)
{
data = new EvaluationData();
toSet.UserData.Add(typeof(EvaluationData), data);
}
data.Type = newType;
}