cryo examples

example.cpp

using namespace cryo;

// define some entities
struct author
{
    autogenerate<int>::type id;
    std::string name;
};

CRYO_DECLARE_ENTITY(author, id, (name));

struct book
{
    autogenerate<int>::type id;
    std::string title;
    author auth;
};

CRYO_DECLARE_ENTITY(book, id, (title)(auth));

// query a database that already has data
template <typename Connection>
typename Connection::uint_type count_books_for_author(
    Connection const& conn, std::string const& name)
{
    return count<book>(
        col(&book::auth)(&author::name) == name);
}