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authorBoris Kolpackov <boris@codesynthesis.com>2011-08-04 13:29:43 +0200
committerBoris Kolpackov <boris@codesynthesis.com>2011-08-04 13:29:43 +0200
commit18ef14486e46064f4317ab407c5fe0afa3209d4b (patch)
treef70e9fb4a7d492197dca3f1fcbf05ffdf308af1a /common/wrapper/driver.cxx
parent84b6d8488a2415c1c6c91b2234993497ab8f792b (diff)
Add support for value wrappers
Wrapper is a class that wraps another type. Examples of wrappers are various smart pointers, holders, etc. A wrapper can be transparent or it can handle the NULL semantics. The new odb::nullable class template is a NULL wrapper that helps to add the NULL semantics to a value type. New test: common/wrapper.
Diffstat (limited to 'common/wrapper/driver.cxx')
-rw-r--r--common/wrapper/driver.cxx73
1 files changed, 73 insertions, 0 deletions
diff --git a/common/wrapper/driver.cxx b/common/wrapper/driver.cxx
new file mode 100644
index 0000000..ed4d83f
--- /dev/null
+++ b/common/wrapper/driver.cxx
@@ -0,0 +1,73 @@
+// file : common/wrapper/driver.cxx
+// author : Boris Kolpackov <boris@codesynthesis.com>
+// copyright : Copyright (c) 2009-2011 Code Synthesis Tools CC
+// license : GNU GPL v2; see accompanying LICENSE file
+
+// Test wrapper machinery.
+//
+
+#include <memory> // std::auto_ptr
+#include <cassert>
+#include <iostream>
+
+#include <odb/database.hxx>
+#include <odb/transaction.hxx>
+
+#include <common/common.hxx>
+
+#include "test.hxx"
+#include "test-odb.hxx"
+
+using namespace std;
+using namespace odb::core;
+
+int
+main (int argc, char* argv[])
+{
+ try
+ {
+ auto_ptr<database> db (create_database (argc, argv));
+
+ //
+ //
+ unsigned long id;
+ {
+ object o;
+ o.num.reset (new unsigned long (123));
+ o.nstrs.push_back (nullable_string ());
+ o.nstrs.push_back (nullable_string ("123"));
+#ifdef HAVE_TR1_MEMORY
+ o.tr1_strs.push_back (tr1_nullable_string ());
+ o.tr1_strs.push_back (tr1_nullable_string (new string ("123")));
+#endif
+
+ transaction t (db->begin ());
+ id = db->persist (o);
+ t.commit ();
+ }
+
+ //
+ //
+ {
+ transaction t (db->begin ());
+ auto_ptr<object> o (db->load<object> (id));
+ t.commit ();
+
+ assert (*o->num == 123);
+ assert (o->str.get () == 0);
+ assert (o->nstr.null ());
+ assert (o->nstrs[0].null ());
+ assert (o->nstrs[1].get () == "123");
+#ifdef HAVE_TR1_MEMORY
+ assert (!o->tr1_str);
+ assert (!o->tr1_strs[0]);
+ assert (*o->tr1_strs[1] == "123");
+#endif
+ }
+ }
+ catch (const odb::exception& e)
+ {
+ cerr << e.what () << endl;
+ return 1;
+ }
+}