Method expression

YACReaderLibrary/db/query_parser.cpp:307–325

}

QueryParser::TreeNode QueryParser::expression()
{
    if (tokenType() == Token::Type::word) {
        auto left = token(true);
        if (isOperatorToken(tokenType())) {
            auto expOperator = token(true);
            if (tokenType() != Token::Type::word && tokenType() != Token::Type::quotedWord) {
                throw std::invalid_argument("missing right operand");
            }
            auto right = token(true);

            return TreeNode("expression", { TreeNode(toLower(left), { }), TreeNode(right, { }) }, expOperator);
        } else {
            return TreeNode("expression", { TreeNode("all", { }), TreeNode(left, { }) });
        }
    }

    return baseToken();
}

QueryParser::TreeNode QueryParser::baseToken()
{