private static IEnumerable<Loc> Process(string source)
{
var buffer = new CharBuffer(source);
var sb = new StringBuilder(source);
while (buffer.MoveNext())
{
var c = buffer.GetCurrent();
if ((c == KS || c == BS || c == IS) && IsStart(buffer))
{
var type = c == KS ? ItemType.Keyword :
c == BS ? ItemType.Bold :
c == IS ? ItemType.Italic :
ItemType.Italic;
var a = buffer.SetAnchor();
var rc = c;
while (!EndSym(rc, buffer.GetNext()))
buffer.MoveNext();
if (buffer.GetNext() != rc)
buffer.BackToAnchor();
else
{
yield return new Loc(a, buffer.Offset - a + 2, type);
buffer.MoveNext();
}
}
}
}
private static bool IsStart(CharBuffer buffer)
{
if (buffer.Offset == 1)
return true;
var c = buffer.GetPrevious();
return !Char.IsLetterOrDigit(c);
}