IsolateQuotedWord(
string Text, int Bx, TextTraits Traits)
{
ScanPatternResults spr = null;
int? ex = null;
string wordText = null;
char ch1 = Text[Bx];
LiteralType litType = LiteralType.none;
// is start of a verbatim string literal
if ((Traits.VerbatimLiteralPattern != null) &&
(Traits.VerbatimLiteralPattern.Match(Text, Bx)))
{
var rv = VerbatimLiteral.ScanCloseQuote(
Text, Traits.VerbatimLiteralPattern, Bx);
ex = rv.Item1;
wordText = rv.Item2;
litType = LiteralType.VerbatimString;
}
// is a quoted literal
else if (Traits.IsQuoteChar(ch1) == true)
{
ex = Scanner.ScanCloseQuote(Text, Bx, Traits.QuoteEncapsulation);
if (ex.Value != -1)
{
int lx = ex.Value - Bx + 1;
wordText = Text.Substring(Bx, lx);
// correct the following at some point. Should be either string or
// char lit.
litType = LiteralType.String;
}
}
// not a quoted literal
if ((ex == null) || (ex.Value == -1))
{
throw (new ApplicationException(
"Closing quote not found starting at position " +
Bx.ToString() + " in " + Text));
}
else
{
// setup the non word which follows the closing quote.
int ix = ex.Value + 1;
if (Text.IsPastEnd(ix))
{
spr = new ScanPatternResults(-1);
}
else
{
// the char that follows the closing quote must be a delim
int remLx = Text.Length - ix;
spr = Scanner.ScanEqualAny(Text, ix, remLx, Traits.NonWordPatterns);
if (spr.FoundPos != ix)
{
throw new ApplicationException(
"invalid char follows close quote at pos " + ix.ToString() +
" in " + Stringer.Head(Text, 80));
}
}
}
return(new Tuple <int, int?, string, LiteralType, ScanPatternResults>
(Bx, ex, wordText, litType, spr));
}