private static void parseBalanced(ASTNode node, SubNodeFactory snf, int lToken, int rToken)
{
if (node is ASTNodeAbstractExpr)
{
ASTNodeAbstractExpr absNode = (ASTNodeAbstractExpr)node;
int i = 0;
while (i < absNode.content.Count)
{
int type = absNode.getTokenType(i);
if (type == rToken)
{
throw new XPathSyntaxException(); //unbalanced
}
else if (type == lToken)
{
int j = absNode.indexOfBalanced(i, rToken, lToken, rToken);
if (j == -1)
{
throw new XPathSyntaxException(); //mismatched
}
absNode.condense(snf.newNode(absNode.extract(i + 1, j)), i, j + 1);
}
i++;
}
}
for (IEnumerator e = node.getChildren().GetEnumerator(); e.MoveNext();)
{
parseBalanced((ASTNode)e.Current, snf, lToken, rToken);
}
}
//i == index of token beginning func call (func name)
private static void condenseFuncCall(ASTNodeAbstractExpr node, int funcStart)
{
ASTNodeFunctionCall funcCall = new ASTNodeFunctionCall((XPathQName)node.getToken(funcStart).val);
int funcEnd = node.indexOfBalanced(funcStart + 1, Token.RPAREN, Token.LPAREN, Token.RPAREN);
if (funcEnd == -1)
{
throw new XPathSyntaxException(); //mismatched parens
}
ASTNodeAbstractExpr.Partition args = node.partitionBalanced(Token.COMMA, funcStart + 1, Token.LPAREN, Token.RPAREN);
if (args.pieces.Count == 1 && ((ASTNodeAbstractExpr)args.pieces[0]).content.Count == 0)
{
//no arguments
}
else
{
//process arguments
funcCall.args = args.pieces;
}
node.condense(funcCall, funcStart, funcEnd + 1);
}