private static bool ParseOpenParenthesis(Parser.ParseContext context)
{
context.BpOrder.Push(TokenType.OpenParenthesis);
ValidateTokenOrder(context, TokenType.OpenParenthesis);
Element element = new ElementGrouping(TokenType.OpenParenthesis);
context.Ouput.Push(element);
context.Stack.Push(element);
context.TokenPosition++;
return(true);
}
private static bool ParseCloseParenthesis(Parser.ParseContext context)
{
if (context.BpOrder.Count == 0 || context.BpOrder.Pop() != TokenType.OpenParenthesis)
{
throw new ELException("Invalid token at " + context.TokenPosition);
}
ValidateTokenOrder(context, TokenType.CloseParenthesis);
Element element = new ElementGrouping(TokenType.CloseParenthesis);
while (context.Stack.Count > 0)
{
Element lastElement = context.Stack.Pop();
if (lastElement.Type.Equals(TokenType.OpenParenthesis))
{
break;
}
context.Ouput.Push(lastElement);
}
context.Ouput.Push(element);
context.TokenPosition++;
return(true);
}
