/// <summary>
/// Проверка входного орератора на совпадение
/// </summary>
/// <param name="items">Колекция элементов выражений сомпиляции</param>
/// <param name="indexEvent">Индек начала проверки</param>
public bool IsCheck(List <CompiledItem> items, int index)
{
if (items[index].Text != Signatures[0])
{
return(false);
}
int startIndex = 0;
if (_operatorItemList[0].Kind == eCompiledItemKind.Expression)
{
if (index == 0)
{
return(false);
}
else if (items[index - 1].Kind != eCompiledItemKind.Expression)
{
return(false);
}
else
{
startIndex = 1;
}
}
else if (index > 0 && items[index - 1].Kind != eCompiledItemKind.Signature)
{
return(false);
}
for (int i = startIndex; i < _operatorItemList.Count; i++)
{
if (items.Count <= index)
{
return(false);
}
OperatorItem operatorItem = _operatorItemList[i];
CompiledItem compiledItem = items[index];
if (operatorItem.Kind != compiledItem.Kind)
{
return(false);
}
if (operatorItem.Kind == eCompiledItemKind.Signature && operatorItem.Text != compiledItem.Text)
{
return(false);
}
index++;
}
return(true);
}
/// <summary>
/// Компиляция текстового выражения
/// </summary>
/// <param name="sourceString">Строка с выражением</param>
/// <param name="value">Объект занчения объекта переменной</param>
/// <returns>Скомпилированный объект выражения</returns>
public Expression Compile(string sourceString, Value value)
{
if (sourceString == null)
{
throw new ArgumentNullException("sourceString");
}
if (sourceString.Length == 0)
{
throw new ArgumentException("String is empty.", "sourceString");
}
List <CompiledItem> res = new List <CompiledItem>();
int length;
string operandString;
CompiledItem addItem;
string signature;
List <Operator> collection = null;
bool operandStarted = false;
int operandStartIndex = 0;
for (int i = 0; i < sourceString.Length; i++)
{
if (sourceString[i] == ' ')
{
continue;
}
length = 0;
addItem = null;
signature = null;
operandString = sourceString.Substring(i);
foreach (KeyValuePair <string, List <Operator> > pair in _signaturesDictionary)
{
if (operandString.StartsWith(pair.Key) && pair.Key.Length > length)
{
signature = pair.Key;
collection = pair.Value;
}
}
if (signature != null)
{
if (collection[0].Kind == eOperatorKind.Variable)
{
if (collection[0].Signatures.Count == 1)
{
res.Add(GetVariableOrValue(signature, value));
}
else
{
signature = operandString.Substring(0, operandString.IndexOf(collection[0].Signatures[1]) + collection[0].Signatures[1].Length);
res.Add(GetVariableOrValue(signature.Substring(collection[0].Signatures[0].Length,
signature.Length - (collection[0].Signatures[0].Length + collection[0].Signatures[1].Length)), value));
}
i += signature.Length - 1;
continue;
}
addItem = new CompiledItem(signature, collection);
if (operandStarted)
{
res.Add(GetVariableOrValue(sourceString.Substring(operandStartIndex, i - operandStartIndex), value));
operandStarted = false;
}
res.Add(addItem);
if (addItem.Kind == eCompiledItemKind.Signature)
{
i += addItem.Text.Length - 1;
}
}
else if (!operandStarted)
{
operandStarted = true;
operandStartIndex = i;
}
}
if (operandStarted)
{
res.Add(GetVariableOrValue(sourceString.Substring(operandStartIndex), value));
}
return(LinkExpression(res));
}
