public CompositeSegment?Next()
{
while (_currentIndex < _compositeFormatString.Length)
{
char c = _compositeFormatString[_currentIndex];
if (c == '{')
{
if (_state == State.Literal)
{
_state = State.New;
return(CompositeSegment.Literal(_spanStart, _currentIndex));
}
_currentIndex++;
return(ParseInsertionPoint());
}
else
{
if (_state != State.Literal)
{
_state = State.Literal;
_spanStart = _currentIndex;
}
}
_currentIndex++;
}
if (_state == State.Literal)
{
_state = State.New;
return(CompositeSegment.Literal(_spanStart, _currentIndex));
}
return(null);
}
public CompositeSegment?Next()
{
while (_currentIndex < _compositeFormatString.Length)
{
char c = _compositeFormatString[_currentIndex];
if (c == '{')
{
if (_state == State.Literal)
{
_state = State.New;
return(CompositeSegment.Literal(_spanStart, _currentIndex));
}
if ((_currentIndex + 1 < _compositeFormatString.Length) && (_compositeFormatString[_currentIndex + 1] == c))
{
_state = State.Literal;
_currentIndex++;
_spanStart = _currentIndex;
}
else
{
_currentIndex++;
return(ParseInsertionPoint());
}
}
else if (c == '}')
{
if ((_currentIndex + 1 < _compositeFormatString.Length) && (_compositeFormatString[_currentIndex + 1] == c))
{
if (_state == State.Literal)
{
_state = State.New;
return(CompositeSegment.Literal(_spanStart, _currentIndex));
}
_state = State.Literal;
_currentIndex++;
_spanStart = _currentIndex;
}
else
{
throw new Exception("missing start bracket");
}
}
else
{
if (_state != State.Literal)
{
_state = State.Literal;
_spanStart = _currentIndex;
}
}
_currentIndex++;
}
if (_state == State.Literal)
{
_state = State.New;
return(CompositeSegment.Literal(_spanStart, _currentIndex));
}
return(null);
}