/*
* LocationPathPattern ::= '/' RelativePathPattern? | '//'? RelativePathPattern | IdKeyPattern (('/' | '//') RelativePathPattern)?
*/
private QilNode ParseLocationPathPattern()
{
QilNode opnd;
switch (_scanner.Kind)
{
case LexKind.Slash:
_scanner.NextLex();
opnd = _ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null);
if (XPathParser.IsStep(_scanner.Kind))
{
opnd = _ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern());
}
return(opnd);
case LexKind.SlashSlash:
_scanner.NextLex();
return(_ptrnBuilder.JoinStep(
_ptrnBuilder.Axis(XPathAxis.Root, XPathNodeType.All, null, null),
_ptrnBuilder.JoinStep(
_ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null),
ParseRelativePathPattern()
)
));
case LexKind.Name:
if (_scanner.CanBeFunction && _scanner.Prefix.Length == 0 && (_scanner.Name == "id" || _scanner.Name == "key"))
{
opnd = ParseIdKeyPattern();
switch (_scanner.Kind)
{
case LexKind.Slash:
_scanner.NextLex();
opnd = _ptrnBuilder.JoinStep(opnd, ParseRelativePathPattern());
break;
case LexKind.SlashSlash:
_scanner.NextLex();
opnd = _ptrnBuilder.JoinStep(opnd,
_ptrnBuilder.JoinStep(
_ptrnBuilder.Axis(XPathAxis.DescendantOrSelf, XPathNodeType.All, null, null),
ParseRelativePathPattern()
)
);
break;
}
return(opnd);
}
break;
}
opnd = ParseRelativePathPattern();
return(opnd);
}