[Gretl-devel] Re: Datatypes of json items

On Sat, 15 Jun 2019, Artur Tarassow wrote: > Dear all, > > I hope you had a successful gretl conference in Naples! > > I am currently working with json files again. Using latest git version of > gretl on Ubuntu linux (even though the behavior also occurs for older > versions), I've found that some of the json-elements grabbed are not of the > expected datatype. See the the following example and the file attached: > > > <hansl> > string PATH2JSON = "/home/at/tmp/"                    # set your path > string jsonfile = sprintf("%s/ex_json_num_vector.json", PATH2JSON) > string jread = readfile("@jsonfile") > bundle B = jsongetb(jread) > b = B.JSON > > # Evaluate type of elements > #----------------------------------------------------- > # Item         Expected        Is > # v1        string                null > # v2        string array       string array > # v3        scalar               scalar > # v4        matrix              string array > > loop i=1..nelem(b) -q >     string str = "v$i" >     eval b["@str"] >     eval typestr(typeof(b["@str"])) >     print "" > endloop > </hansl> > > Is there a rational reason for this behavior? Not really. It seems that typeof() is not reaching inside bundles to find the type of their contents. That should be made to happen.