/// <summary>
/// Add a parameter definition node to this parameter list node.
/// </summary>
/// <param name="node">The parameter definition node to add.</param>
/// <exception cref="ArgumentNullException">Thrown if the 'node' parameter is <c>null</c>.</exception>
/// <exception cref="ArgumentException">
/// If a parameter with the same name already exists.
/// </exception>
public void Add(LSLParameterNode node)
{
if (node == null)
{
throw new ArgumentNullException("node");
}
if (_parameters.ContainsKey(node.Name))
{
throw new ArgumentException(
"Parameter with the name \"{0}\" has already been added to the parameter list.");
}
node.Parent = this;
node.ParameterIndex = _parameters.Count;
_parameters.Add(node.Name, node);
}
/// <summary>
/// Builds a parameter list node directly from a parser context, checking for duplicates and reporting
/// duplicate parameter errors via a validator strategies object. <see cref="ILSLCodeValidatorStrategies" />.
/// </summary>
/// <param name="context">The context to build from</param>
/// <param name="validatorStrategies">The validator strategies object to use for reporting errors or warnings</param>
/// <param name="parameterListType">The parameter list type.</param>
/// <returns>the created parameter list node</returns>
/// <exception cref="ArgumentNullException">
/// <paramref name="context" /> or <paramref name="validatorStrategies" /> is
/// <c>null</c>.
/// </exception>
internal static LSLParameterListNode BuildFromParserContext(LSLParser.OptionalParameterListContext context,
LSLParameterListType parameterListType, ILSLCodeValidatorStrategies validatorStrategies)
{
if (context == null)
{
throw new ArgumentNullException("context");
}
if (validatorStrategies == null)
{
throw new ArgumentNullException("validatorStrategies");
}
var result = new LSLParameterListNode(context, parameterListType);
var parameterList = context.parameterList();
if (parameterList == null)
{
return(result);
}
var parameterNames = new HashSet <string>();
var parameterIndex = 0;
foreach (var comma in parameterList.children)
{
//'comma' for some reason will be an internal object
//that cannot be accessed via cast when a COMMA token is encountered.
//
//However, Payload contains a CommonToken instance, which implements IToken.
var token = comma.Payload as IToken;
//when a parameter def is found, 'comma' will be the grammar defined
//LSLParser.ParameterDefinitionContext type.
var parameter = comma as LSLParser.ParameterDefinitionContext;
if (token != null)
{
result._sourceRangeCommaList.Add(new LSLSourceCodeRange(token));
}
else if (parameter != null)
{
if (parameterNames.Contains(parameter.ID().GetText()))
{
var paramLocation = new LSLSourceCodeRange(parameter);
validatorStrategies.SyntaxErrorListener.ParameterNameRedefined(
paramLocation,
parameterListType,
LSLTypeTools.FromLSLTypeName(parameter.TYPE().GetText()),
parameter.ID().GetText());
result.HasErrors = true;
result._parameters.Clear();
return(result);
}
parameterNames.Add(parameter.ID().GetText());
var addition = new LSLParameterNode(parameter)
{
ParameterIndex = parameterIndex
};
result.Add(addition);
parameterIndex++;
}
}
parameterNames.Clear();
return(result);
}