Support for case method call

According to OData documentation (https://docs.oasis-open.org/odata/odata/v4.01/odata-v4.01-part2-url-conventions.html#sec_case) we should be able to use case method call. I tried this with Microsoft.AspNetCore.OData version 8.0.11.

Client called this URL

http://localhost:60600/odata/Search?$select=name&$compute=case(indexof(name, 'test') eq -1:10000,true:indexof(name, 'test')) as rank&$orderby=rank asc

it returns following error

{
    "error": {
        "code": "",
        "message": "The query specified in the URI is not valid. ')' or ',' expected at position 32 in 'case(indexof(name, 'test') eq -1:10000,true:indexof(name, 'test')) as rank'.",
        "details": [],
        "innererror": {
            "message": "')' or ',' expected at position 32 in 'case(indexof(name, 'test') eq -1:10000,true:indexof(name, 'test')) as rank'.",
            "type": "Microsoft.OData.ODataException",
            "stacktrace": "   at Microsoft.OData.UriParser.FunctionCallParser.ParseArgumentListOrEntityKeyList(Action restoreAction)\r\n   at Microsoft.OData.UriParser.FunctionCallParser.TryParseIdentifierAsFunction(QueryToken parent, QueryToken& result)\r\n   at Microsoft.OData.UriParser.IdentifierTokenizer.ParseIdentifier(QueryToken parent)\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParsePrimary()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseInHas()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseUnary()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseMultiplicative()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseAdditive()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseComparison()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseLogicalAnd()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseLogicalOr()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseExpression()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseComputeExpression()\r\n   at Microsoft.OData.UriParser.UriQueryExpressionParser.ParseCompute(String compute)\r\n   at Microsoft.OData.UriParser.ODataQueryOptionParser.ParseComputeImplementation(String compute, ODataUriParserConfiguration configuration, ODataPathInfo odataPathInfo)\r\n   at Microsoft.OData.UriParser.ODataQueryOptionParser.ParseCompute()\r\n   at Microsoft.AspNetCore.OData.Query.Validator.ODataQueryValidator.Validate(ODataQueryOptions options, ODataValidationSettings validationSettings)\r\n   at Microsoft.AspNetCore.OData.Query.EnableQueryAttribute.ValidateQuery(HttpRequest request, ODataQueryOptions queryOptions)\r\n   at Microsoft.AspNetCore.OData.Query.EnableQueryAttribute.OnActionExecuting(ActionExecutingContext actionExecutingContext)"
        }
    }
}

seems like case is not supported

Reproduce the case expression from the issue in the $compute query and start with the ODataQueryOptionParser.ParseCompute entry point and the FunctionCallParser stack frames. Trace how the expression is parsed, then verify that the documented case syntax is accepted and the query can order by the computed rank.