//============================================================
private static int SeekWithoutClamping(this StringView str, int start, SeekMode mode, Ward1D ward)
{
if (mode == SeekMode.MoveOneChar)
{
return(start + ward.GetOffset());
}
else if (mode == SeekMode.UntilNewline)
{
if (ward == Ward1D.Backward)
{
return(str.FindLast('\n', start + 1));
}
else if (ward == Ward1D.Forward)
{
return(str.FindFirst('\n', start));
}
}
else
{
Debug.Assert((mode
& (SeekMode.LiterallySpaced | SeekMode.PassingQuotation | SeekMode.BracketBalanced)) != 0);
if (ward == Ward1D.Backward)
{
return(str.SeekToSpaceBalanced(start, mode, -1, -1) - 1);
}
else if (ward == Ward1D.Forward)
{
return(str.SeekToSpaceBalanced(start + 1, mode, 1, 0));
}
}
throw new Exception();
}
public static int GetLastSpaceBoundary(this StringView str)
{
return(str.FindLast(ChrCategory.WhitespacePredicate.InvertCondition()));
}
public static int FindLast(this StringView str, char c, int start)
{
return(str.FindLast((char chr) => chr == c, start));
}
public static int FindLast(this StringView str, char c)
{
return(str.FindLast((char chr) => chr == c, str.Length));
}
public static int FindLast(this StringView str, System.Predicate <char> pred)
{
return(str.FindLast(pred, str.Length));
}