C++ operator sugar - a C++ way of looping through array #14

Hi,

The C++ wrapper is great, but I'm missing one thing: a way to loop through array in a c++ fool-proof way. I know that I can do this:

json_value arr = (*settings)["web_server"]["cgi_extensions"];
if (arr.type == json_array) {
    int length = arr.u.array.length;
    for (int i = 0; i < length; i++) {
    ...
    }
}

But, a newbie might forget the type checking and just go with:

json_value arr = (*settings)["web_server"]["cgi_extensions"];
int length = arr.u.array.length;
for (int i = 0; i < length; i++) {
...
}

If someone makes a mistake in the json file, so that array is missing or becomes a string, then this code will crash the application.

I love the C++ wrapper mostly that it is fool-proof, I can reference to a non-existing key and it just returns an empty string, I will mistake the types and it will just return 0, nothing bad happens. But when it comes to looping through arrays it's easy to make a mistake, I've done it already and I'm a little scared of writing such code.

What I'm looking for is some method like GetArrayLength() that will return array length or 0 when value is not an array.

Czarek.