private Exception InvalidTokenError(Token token)
{
return new TestSelectionParserException(string.Format(
"Unexpected token '{0}' at position {1} in selection expression.", token.Text, token.Pos));
}
private static string EmitElement(string fmt, Token lhs, Token rhs)
{
return string.Format(fmt, lhs.Text, XmlEscape(rhs.Text));
}
private static string EmitFilterElement(Token lhs, Token op, Token rhs)
{
string fmt = null;
if (op == EQ_OP1 || op == EQ_OP2)
fmt = "<{0}>{1}</{0}>";
else if (op == NE_OP)
fmt = "<not><{0}>{1}</{0}></not>";
else if (op == MATCH_OP)
fmt = "<{0} re='1'>{1}</{0}>";
else if (op == NOMATCH_OP)
fmt = "<not><{0} re='1'>{1}</{0}></not>";
else
fmt = "<{0} op='" + op.Text + "'>{1}</{0}>";
return EmitElement(fmt, lhs, rhs);
}
private static string EmitPropertyElement(Token lhs, Token op, Token rhs)
{
string fmt = null;
if (op == EQ_OP1 || op == EQ_OP2)
fmt = "<prop name='{0}'>{1}</prop>";
else if (op == NE_OP)
fmt = "<not><prop name='{0}'>{1}</prop></not>";
else if (op == MATCH_OP)
fmt = "<prop name='{0}' re='1'>{1}</prop>";
else if (op == NOMATCH_OP)
fmt = "<not><prop name='{0}' re='1'>{1}</prop></not>";
else
fmt = "<prop name='{0}' op='" + op.Text + "'>{1}</prop>";
return EmitElement(fmt, lhs, rhs);
}
public Token NextToken()
{
Token result = _lookahead ?? GetNextToken();
_lookahead = null;
return result;
}