public void PushCurrent(QNode newCurrent)
{
if (current != null)
prevElements.Add(current);
current = newCurrent;
}
public static QNode[] Parse(string text, int index = 0, int state = 0)
{
var stack = new Stack<ParseInfo>();
var info = new ParseInfo();
Action PopWhileSingle = () =>
{
for (; stack.Count > 0 && info.isSingle == true; )
{
var parent = stack.Pop();
parent.PushChild(info);
info = parent;
}
};
var lexemBuilder = new System.Text.StringBuilder();
for (; ; )
{
char ch = index < text.Length ? text[index] : (char)0;
var isEnd = index >= text.Length;
if (state == 0)
{
if (index >= text.Length)
{
PopWhileSingle();
if (stack.Count > 0)
throw new Exception($"Не хватает закрывающихся скобок - '{stack.Count}' шт.");
return info.allElements;
}
else if (char.IsWhiteSpace(ch))
{
index++;
continue;
}
else if (ch == Quote)
{
state = 2;
lexemBuilder = new System.Text.StringBuilder();
index++;
continue;
}
else if (ch == DoubleQuote)
{
state = 3;
lexemBuilder = new System.Text.StringBuilder();
index++;
continue;
}
else if (char.IsLetter(ch) || char.IsDigit(ch) || ch == '-' || ch == '_')
{
state = 1;
lexemBuilder = new System.Text.StringBuilder();
lexemBuilder.Append(ch);
index++;
continue;
}
else if (ch == ':' && (index + 1) < text.Length && text[index + 1] == ':')
{
state = 1;
lexemBuilder = new System.Text.StringBuilder();
lexemBuilder.Append(text.Substring(index, 2));
index += 2;
}
else if (ch == ':')
{
stack.Push(info);
info = new ParseInfo { isSingle = true };
index++;
continue;
}
else if (ch == '{' || ch == '(')
{
stack.Push(info);
info = new ParseInfo();
index++;
continue;
}
else if (ch == '}' || ch == ')')
{
PopWhileSingle();
var parentInfo = stack.Pop();
parentInfo.PushChild(info);
info = parentInfo;
index++;
continue;
}
else if (ch == ',' || ch == ';')
{
PopWhileSingle();
info.PushCurrent(null);
index++;
continue;
}
else if (ch == '/' && (index + 1) < text.Length && text[index + 1] == '/')
{
state = 4;
lexemBuilder = new System.Text.StringBuilder();
index += 2;
continue;
}
else
{
throw new Exception(string.Format("invalid char in index:{0}", index));
//index++;
//continue;
}
}
else if (state == 1)
{
if (char.IsLetter(ch) || char.IsDigit(ch) || ch == '-' || ch == '_')
{
lexemBuilder.Append(ch);
index++;
continue;
}
else
{
var q = new QNode(lexemBuilder.ToString());
info.PushCurrent(q);
state = 0;
continue;
}
}
else if (state == 2 || state == 3)
{
var quote = state == 2 ? Quote : DoubleQuote;
if (isEnd)
throw new Exception(string.Format("не законченная строка '{0}'", lexemBuilder));
else if (ch == quote)
{
if ((index + 1) < text.Length && text[index + 1] == quote)
{
lexemBuilder.Append(quote);
index += 2;
continue;
}
else
{
var q = new QNode(lexemBuilder.ToString());
info.PushCurrent(q);
state = 0;
index++;
continue;
}
}
else
{
lexemBuilder.Append(ch);
index++;
continue;
}
}
else if (state == 4)
{
if (ch == '\r' || ch == '\n')
{
//var q = new QElement(lexemBuilder.ToString());
//info.PushCurrent(q);
state = 0;
index++;
continue;
}
else
{
lexemBuilder.Append(ch);
index++;
continue;
}
}
}
}
