'c4Internal::Database' has protected destructor

[Adam Wilson]

I'm using LiteCoreStatic lib in a C++ project, and hit this compilation error: 

'c4Internal::Database' has protected destructor

My sample code:

#include "Database.hh"

static const C4DatabaseConfig kDBConfig = {

    .flags = (kC4DB_Create | kC4DB_AutoCompact | kC4DB_SharedKeys),

    .storageEngine = kC4SQLiteStorageEngine,

    .versioning = kC4RevisionTrees,

};

//==============================================================================

int main (int argc, char* argv[])

{

    Database db ("./c4db/db", kDBConfig);

    db.putRawDocument("test", slice("myKey"), slice(""), slice("goldenRatio") );

    Record record = db.getRawDocument("test", slice("myKey"));

    std::cout << record.key().asString() << ":" << record.body().asString();

}

Should I be instantiating the Database class differently?

[Adam Wilson]

Looking into the library code a bit more, I realised I just need to use the C4Database subclass. 

[Jens Alfke]

On May 27, 2018, at 2:07 AM, Adam Wilson <adam.el...@gmail.com> wrote:

Should I be instantiating the Database class differently?

Database (and its subclass C4Database) are ref-counted, so they can only be allocated on the heap, like this:

Retained<Database> db = new Database(…);

Using LiteCore directly is unsupported, and using its C++ API is doubly unsupported — that’s not even considered a public API of LiteCore, it’s just the internal implementation. Please use the C API instead. (There are some convenience wrappers in c4.hh that make it a lot more convenient to use in C++.)

—Jens

Jens Alfke — Mobile Architect — Couchbase, Inc.

[adam wilson]

Thanks Jens. I'll reconsider my approach. 

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