/// <summary>
/// Accept a visit from an implementor of <see cref="ILSLValidatorNodeVisitor{T}" />
/// </summary>
/// <typeparam name="T">The visitors return type.</typeparam>
/// <param name="visitor">The visitor instance.</param>
/// <returns>The value returned from this method in the visitor used to visit this node.</returns>
/// <exception cref="ArgumentNullException"><paramref name="visitor"/> is <c>null</c>.</exception>
public T AcceptVisitor <T>(ILSLValidatorNodeVisitor <T> visitor)
{
if (visitor == null)
{
throw new ArgumentNullException("visitor");
}
if (IsGlobal)
{
return(visitor.VisitGlobalVariableReference(this));
}
if (IsLocal)
{
return(visitor.VisitLocalVariableReference(this));
}
if (IsParameter)
{
return(visitor.VisitParameterVariableReference(this));
}
if (IsLibraryConstant)
{
return(visitor.VisitLibraryConstantVariableReference(this));
}
throw new InvalidOperationException(typeof(LSLVariableNode).Name +
" could not be visited, its state is invalid");
}