/// <summary>
/// Adds a TFunction to the function dictionary.
/// </summary>
/// <param name="interpreter">The interpreter that the method is being called from.</param>
/// <param name="function">The TFunction to be added to the function dictionary.</param>
/// <returns>Null if the operation was successful, otherwise a TException.</returns>
public static TException AddFunction(Interpreter interpreter, TFunction function)
{
if (function == null)
{
return(new TException(interpreter, "Null TFunction given"));
}
// Reject the function if it's already in the standard library
TFunction existingFunction = StdLibrary.GetFunction(function.Name);
if (existingFunction != null)
{
return(new TException(interpreter,
"Standard library function with name '" + function.Name + "' already exists"));
}
// Add it to the function dictionary, overwriting another function with the same name if neccessary
existingFunction = GetFunction(function.Name, false);
if (existingFunction == null)
{
functions.Add(function.Name, function);
}
else
{
existingFunction.HardCodedFunction = null;
existingFunction.CustomFunction = "";
existingFunction.Block = null;
existingFunction.CopyFrom(function);
}
return(null);
}
/// <summary>
/// Searches for a Toast function with the specified name.
/// </summary>
/// <param name="functionName">The name of the Toast function to seach for.</param>
/// <param name="includeStdLibrary">Whether the Toast standard library should be searched.</param>
/// <returns>A TFunction if the operation was successful, otherwise null.</returns>
public static TFunction GetFunction(string functionName, bool includeStdLibrary = true)
{
TFunction returnValue;
if (functions.TryGetValue(functionName, out returnValue))
{
return(returnValue);
}
return(includeStdLibrary ? StdLibrary.GetFunction(functionName) : null);
}