Notes about C++-11 for qpdf 10

TODO

@@ -8,6 +8,36 @@ Fuzz Errors
   * Timeout in xref reconstruction (won't fix): 15659
   * Out of memory: 15730
 
+C++-11 (for qpdf 10)
+====================
+
+* Consider requiring C++-11 for qpdf 10.
+
+* My c++11 branch adds autoconf tests to require C++-11 and
+  re-implements PointerHolder so that it is interchangeable with
+  std::shared_ptr. Once this is in master, it will be possible to
+  globally replace PointerHolder with std::shared_ptr. This will break
+  binary compatibility, but if people want source compatibility, they
+  just have to explicitly include qpdf/PointerHolder.hh. We should
+  actually look at every use of PointerHolder to see which ones need
+  to be std::shared_ptr and which ones can be std::unique_ptr. For
+  source compatibility, all uses of PointerHolder in the API should be
+  changed to std::shared_ptr, though most likely they have to be that
+  anyway since std::unique_ptr is not copiable.
+
+* QIntC.hh could be simplified with type_traits.
+
+* Search for ::iterator and ::const_iterator and replace with either
+  auto or foreach-style iteration.
+
+* There may be some places where std::function and lambdas can
+  simplify handlers rather than using classes with apply methods.
+
+* Find places where we declare but don't define copy and assignment
+  and replace with deleted methods to move errors from link to compile
+  time.
+
+
 Lexical
 =======