Implement {query,execute}_{one,value}() shortcut functions

Useful in situations where the query is know to return at most one element
(*_one) or exactly one element (*_value).

1 files changed, 23 insertions, 0 deletions

diff --git a/odb/prepared-query.hxx b/odb/prepared-query.hxx
index b321564..5fc4783 100644
--- a/odb/prepared-query.hxx
+++ b/odb/prepared-query.hxx
@@ -86,6 +86,29 @@ namespace odb
       return r;
     }
 
+    typename object_traits<T>::pointer_type
+    execute_one ()
+    {
+      return execute (false).one ();
+    }
+
+    bool
+    execute_one (T& object)
+    {
+      return execute (false).one (object);
+    }
+
+    T
+    execute_value ()
+    {
+      // Compiler error pointing here? The object must be default-
+      // constructible in order to use the return-by-value API.
+      //
+      T o;
+      execute (false).value (o);
+      return o;
+    }
+
     const char*
     name () const
     {