Allow lambdas & std::functions as query factories with C++-98 builds of libodb

1 files changed, 15 insertions, 0 deletions

diff --git a/reference/list b/reference/list
index 570537e..8d95506 100644
--- a/reference/list
+++ b/reference/list
@@ -11,3 +11,18 @@
   * support via bool flag and make user instantiate - burdensome
   * support via bool flag and instantiate stderr_full_tracer - code bloat
     but seems the best option
+
++ C++11 support is not trully header only [c++11]
+
+  Added a new class details::function_wrapper<F>, which can be used similarly
+  to std::function<F>. In particular, C++11 code can construct a
+  function_wrapper from a lambda, or a std::function, or another
+  function_wrapper. But it differs from std::function in this respect:
+  C++98 code can declare and define function_wrapper objects.
+
+  Now all builds (98 or 11) of libodb keep their callbacks in
+  function_wrappers. C++11 user code can register std::functions or lambdas as
+  callbacks, and the glue that turns those into function_wrappers for libodb is
+  header-only.
+
+  This technique is currently used for data migrations and query factories.