/// <summary>
/// Gets the return value from calling a function.
/// </summary>
/// <param name="scope">The scope object containing variable values.</param>
/// <param name="result">[out] The new expression containing the function result.</param>
/// <returns>
/// <c>true</c> if invocation was successful, <c>false</c> if something went wrong, in which case <paramref name="result" /> will likely be a <see cref="ParseErrorExpression" />.
/// </returns>
public bool Evaluate(InterpreterScope scope, out ExpressionBase result)
{
bool inAssignment = (scope.GetInterpreterContext <AssignmentExpression>() != null);
if (inAssignment && _fullyExpanded)
{
// this function call is already fully expanded, allow it to be assigned without re-evaluating
result = this;
}
else
{
if (!Evaluate(scope, inAssignment, out result))
{
return(false);
}
}
return(true);
}