From dee5f10d1d75eee43596ad1dfb47ecec9e0b1307 Mon Sep 17 00:00:00 2001
From: Michael Shepanski <michael@codesynthesis.com>
Date: Wed, 22 Oct 2014 16:42:05 +0200
Subject: Allow lambdas & std::functions as query factories with C++-98 builds
 of libodb

---
 common/prepared/driver.cxx | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

diff --git a/common/prepared/driver.cxx b/common/prepared/driver.cxx
index 5c622c0..dfbdf13 100644
--- a/common/prepared/driver.cxx
+++ b/common/prepared/driver.cxx
@@ -249,7 +249,7 @@ main (int argc, char* argv[])
       }
 
       db->query_factory ("person-params-query",
-                         database::query_factory_type ());
+                         database::query_factory_ptr ());
     }
 
     // Cached query with wildcard factory.
@@ -273,7 +273,7 @@ main (int argc, char* argv[])
         t.commit ();
       }
 
-      db->query_factory ("", database::query_factory_type ());
+      db->query_factory ("", database::query_factory_ptr ());
     }
 
     // Cached query with lambda factory.
@@ -312,7 +312,47 @@ main (int argc, char* argv[])
       }
 
       db->query_factory ("person-params-query-2",
-                         database::query_factory_type ());
+                         database::query_factory_ptr ());
+    }
+
+    // Cached query with lambda factory using closure. Forces nonoptimized
+    // representation of std::function.
+    //
+    {
+      const std::string person_name ("John First");
+
+      db->query_factory (
+        "person-params-query-3",
+        [person_name] (const char* name, connection& c)
+        {
+          typedef odb::query<person> query;
+
+          prepared_query<person> pq (
+            c.prepare_query<person> (
+              name,
+              query::age > 50 && query::name != person_name));
+          c.cache_query (pq);
+        });
+
+      {
+        transaction t (db->begin ());
+
+        prep_query pq (db->lookup_query<person> ("person-params-query-3"));
+        assert (pq);
+
+        result r (pq.execute ());
+        assert (size (r) == 4);
+
+        t.commit ();
+      }
+
+      db->query_factory ("person-params-query-3",
+#ifdef HAVE_CXX11_NULLPTR
+                         nullptr
+#else
+                         database::query_factory_ptr ()
+#endif
+      );
     }
 #endif
 
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