public bool TryParse(string input, out string result)
{
result = "";
int index = 0;
foreach (char c in input)
{
if (_parenthesesProvider.IsStartParenthesis(c))
{
//a parenthesis was opened
_openedParentheses.AddParenthesis(c, index);
}
else if (_parenthesesProvider.IsEndParenthesis(c))
{
if (!_openedParentheses.HasAnyOpen())
{
//found an end paranthesis without a start one
result = _stringResultProvider.GetResultString(input, index);
return(false);
}
(char lastOpened, int lastIndex) = _openedParentheses.GetLast();
if (!c.Equals(_parenthesesProvider.GetEndParenthesis(lastOpened)))
{
//found a different closed parenthesis
result = _stringResultProvider.GetResultString(input, index);
return(false);
}
}
index++;
}
if (_openedParentheses.HasAnyOpen())
{
//found unclosed paranthesis
(char lastOpened, int lastIndex) = _openedParentheses.GetLast();
result = _stringResultProvider.GetResultString(input, lastIndex);
return(false);
}
return(true);
}
