public static IMathExpressionParser CreateParser(IOperationFactory operationFactory)
{
_operationFactory = operationFactory ?? throw new ArgumentNullException(nameof(operationFactory));
var highPriorityParser = new MathExpressionParser(operationFactory.CreateHighPriorityOperation, ParseUnary);
var lowPriorityParser = new MathExpressionParser(operationFactory.CreateLowPriorityOperation, highPriorityParser.Parse);
_expressionParser = lowPriorityParser;
return(lowPriorityParser);
}
public IExpression ParseExpression(ITokenizer tokenizer)
{
if (tokenizer == null)
{
throw new ArgumentNullException(nameof(tokenizer));
}
tokenizer.Init();
var expressionParser = MathExpressionParser.CreateParser(_operationFactory);
var expression = expressionParser.Parse(tokenizer);
tokenizer.CurrentToken.EnsureEndOfFileSymbol();
return(expression);
}