/// <summary>
/// Instantiate expression tree from tokens.
/// </summary>
private static FilterExpressionRoot CompileFilters(IEnumerable<Token> token)
{
var reader = new TokenReader(token);
var op = CompileL0(reader);
if (reader.IsRemainToken)
throw new FilterQueryException("Invalid token: " + reader.Get(), reader.RemainQuery);
return new FilterExpressionRoot() { Operator = op };
}
