New example that shows C++11 support, build infrastructure for C++11

1 files changed, 207 insertions, 0 deletions

diff --git a/c++11/driver.cxx b/c++11/driver.cxx
new file mode 100644
index 0000000..68793b1
--- /dev/null
+++ b/c++11/driver.cxx
@@ -0,0 +1,207 @@
+// file      : c++11/driver.cxx
+// copyright : not copyrighted - public domain
+
+#include <memory>   // std::unique_ptr
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/session.hxx>
+#include <odb/transaction.hxx>
+
+#include "database.hxx" // create_database
+
+#include "employee.hxx"
+#include "employee-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+  try
+  {
+    unique_ptr<database> db (create_database (argc, argv));
+
+    // Create a few persistent objects.
+    //
+    {
+      pension_fund bf ("Bright Future");
+
+      // Simple Tech Ltd.
+      //
+      {
+        shared_ptr<employer> er (new employer ("Simple Tech Ltd"));
+
+        shared_ptr<employee> john (new employee ("John", "Doe", er));
+        shared_ptr<employee> jane (new employee ("Jane", "Doe", er));
+
+        john->emails ().insert ("john_d@example.com");
+        john->emails ().insert ("john.doe@example.com");
+
+        jane->emails ().insert ("jane_d@example.com");
+        jane->emails ().insert ("jane.doe@example.com");
+
+        // Set the inverse side of the employee-employer relationship.
+        //
+        er->employees ().push_back (john);
+        er->employees ().push_back (jane);
+
+        transaction t (db->begin ());
+
+        db->persist (er);
+
+        db->persist (john);
+        db->persist (jane);
+
+        t.commit ();
+
+        bf.members ().push_back (lazy_shared_ptr<employee> (*db, john));
+      }
+
+      // Complex Systems Inc.
+      //
+      {
+        shared_ptr<employer> er (new employer ("Complex Systems Inc"));
+
+        shared_ptr<employee> john (new employee ("John", "Smith", er));
+        shared_ptr<employee> jane (new employee ("Jane", "Smith", er));
+
+        john->emails ().insert ("john_s@example.com");
+        john->emails ().insert ("john.smith@example.com");
+
+        jane->emails ().insert ("jane_s@example.com");
+        jane->emails ().insert ("jane.smith@example.com");
+
+        // Set the inverse side of the employee-employer relationship.
+        //
+        er->employees ().push_back (john);
+        er->employees ().push_back (jane);
+
+        transaction t (db->begin ());
+
+        db->persist (er);
+
+        db->persist (john);
+        db->persist (jane);
+
+        t.commit ();
+
+        bf.members ().push_back (lazy_shared_ptr<employee> (*db, jane));
+      }
+
+      transaction t (db->begin ());
+      db->persist (bf);
+      t.commit ();
+    }
+
+    // Load the Bright Future pension fund and print its members.
+    //
+    {
+      session s;
+      transaction t (db->begin ());
+
+      unique_ptr<pension_fund> bf (db->load<pension_fund> ("Bright Future"));
+
+      for (auto i (bf->members ().begin ()); i != bf->members ().end (); ++i)
+      {
+        lazy_shared_ptr<employee>& p (*i);
+        p.load ();
+
+        cout << p->first () << ' ' << p->last () << ", " <<
+          p->employer ()->name () << endl;
+      }
+
+      // Alternative implementation using range-based for-loop.
+      //
+      /*
+      for (lazy_shared_ptr<employee>& p: bf->members ())
+      {
+        p.load ();
+        cout << p->first () << ' ' << p->last () << ", " <<
+          p->employer ()->name () << endl;
+      }
+      */
+
+      cout << endl;
+    }
+
+    // Load Simple Tech Ltd and print its employees.
+    //
+    {
+      session s;
+      transaction t (db->begin ());
+
+      shared_ptr<employer> st (db->load<employer> ("Simple Tech Ltd"));
+
+      for (auto i (st->employees ().begin ());
+           i != st->employees ().end ();
+           ++i)
+      {
+        lazy_weak_ptr<employee>& lwp (*i);
+        shared_ptr<employee> p (lwp.load ()); // Load and lock.
+
+        cout << p->first () << ' ' << p->last () << endl
+             << "  employer: " << p->employer ()->name () << endl;
+
+        for (auto j (p->emails ().begin ()); j != p->emails ().end (); ++j)
+        {
+          cout << "  email: " << *j << endl;
+        }
+
+        cout << endl;
+      }
+
+      // Alternative implementation using range-based for-loop.
+      //
+      /*
+      for (lazy_weak_ptr<employee>& lwp: st->employees ())
+      {
+        shared_ptr<employee> p (lwp.load ()); // Load and lock.
+
+        cout << p->first () << ' ' << p->last () << endl
+             << "  employer: " << p->employer ()->name () << endl;
+
+        for (const string& e: p->emails ())
+          cout << "  email: " << e << endl;
+
+        cout << endl;
+      }
+      */
+
+      t.commit ();
+    }
+
+
+    // Search for Complex Systems Inc employees with the John first name.
+    //
+    {
+      typedef odb::query<employee> query;
+      typedef odb::result<employee> result;
+
+      session s;
+      transaction t (db->begin ());
+
+      result r (db->query<employee> (
+                  query::employer->name == "Complex Systems Inc" &&
+                  query::first == "John"));
+
+      for (auto i (r.begin ()); i != r.end (); ++i)
+        cout << i->first () << ' ' << i->last () << endl;
+
+      // Alternative implementation using range-based for-loop.
+      //
+      /*
+      for (const employee& e: r)
+        cout << e.first () << ' ' << e.last () << endl;
+      */
+
+      t.commit ();
+    }
+  }
+  catch (const odb::exception& e)
+  {
+    cerr << e.what () << endl;
+    return 1;
+  }
+}