private static void HandleStartIndex(ParseContext context)
{
// Validate follows ")", "]", or a property name.
if (context.LastToken == null ||
(context.LastToken.Kind != TokenKind.EndParameter && context.LastToken.Kind != TokenKind.EndIndex && context.LastToken.Kind != TokenKind.PropertyName && context.LastToken.Kind != TokenKind.ExtensionNamedValue && context.LastToken.Kind != TokenKind.UnknownKeyword))
{
throw new ParseException(ParseExceptionKind.UnexpectedSymbol, context.Token, context.Expression);
}
// Wrap the object being indexed into.
var indexer = new IndexerNode();
Node obj = null;
if (context.Containers.Count > 0)
{
ContainerNode container = context.Containers.Peek().Node;
Int32 objIndex = container.Parameters.Count - 1;
obj = container.Parameters[objIndex];
container.ReplaceParameter(objIndex, indexer);
}
else
{
obj = context.Root;
context.Root = indexer;
}
indexer.AddParameter(obj);
// Update the container stack.
context.Containers.Push(new ContainerInfo()
{
Node = indexer, Token = context.Token
});
}
private static void HandleEndIndex(ParseContext context)
{
IndexerNode indexer = context.Containers.Count > 0 ? context.Containers.Peek().Node as IndexerNode : null;
// // Validate:
if (indexer == null || // 1) Container is an indexer
indexer.Parameters.Count != 2) // 2) Exactly 2 parameters
{
throw new ParseException(ParseExceptionKind.UnexpectedSymbol, context.Token, context.Expression);
}
context.Containers.Pop();
}
private static void HandleDereference(ParseContext context)
{
// Validate follows ")", "]", or a property name.
if (context.LastToken == null ||
(context.LastToken.Kind != TokenKind.EndParameter && context.LastToken.Kind != TokenKind.EndIndex && context.LastToken.Kind != TokenKind.PropertyName && context.LastToken.Kind != TokenKind.ExtensionNamedValue && context.LastToken.Kind != TokenKind.UnknownKeyword))
{
throw new ParseException(ParseExceptionKind.UnexpectedSymbol, context.Token, context.Expression);
}
// Wrap the object being indexed into.
var indexer = new IndexerNode();
Node obj = null;
if (context.Containers.Count > 0)
{
ContainerNode container = context.Containers.Peek().Node;
Int32 objIndex = container.Parameters.Count - 1;
obj = container.Parameters[objIndex];
container.ReplaceParameter(objIndex, indexer);
}
else
{
obj = context.Root;
context.Root = indexer;
}
indexer.AddParameter(obj);
// Validate a property name follows.
if (!TryGetNextToken(context))
{
throw new ParseException(ParseExceptionKind.ExpectedPropertyName, context.LastToken, context.Expression);
}
if (context.Token.Kind != TokenKind.PropertyName)
{
throw new ParseException(ParseExceptionKind.UnexpectedSymbol, context.Token, context.Expression);
}
// Add the property name to the indexer, as a string.
String propertyName = context.Token.RawValue;
indexer.AddParameter(new LiteralValueNode(propertyName));
}