Merged scope_check into scope_exit.

As suggested by Peter Dimov on boost-dev ML, scope_check functionality
is merged into scope_exit. Thus scope_exit now has an optional condition
function object, which by default always returns true. If a custom
function object is specified, scope_exit works equivalently to the
previous scope_check, i.e. calls the condition function object to check
whether the action function object needs to be called.

include/boost/scope/scope_fail.hpp

@@ -17,7 +17,7 @@
 #include <type_traits>
 #include <boost/scope/detail/config.hpp>
 #include <boost/scope/exception_checker.hpp>
-#include <boost/scope/scope_check.hpp>
+#include <boost/scope/scope_exit.hpp>
 #include <boost/scope/detail/is_not_like.hpp>
 #include <boost/scope/detail/type_traits/conjunction.hpp>
 #include <boost/scope/detail/type_traits/is_invocable.hpp>
@@ -59,19 +59,19 @@ using is_not_like_scope_fail = detail::is_not_like< T, scope_fail >;
  * due to an exception - the action function object will not be called if
  * the scope is left normally.
  *
- * \sa scope_check
+ * \sa scope_exit
  * \sa scope_success
  *
  * \tparam Func Scope guard action function object type.
  * \tparam Cond Scope guard failure condition function object type.
  */
 template< typename Func, typename Cond = exception_checker >
 class scope_fail :
-    public scope_check< Func, Cond >
+    public scope_exit< Func, Cond >
 {
 //! \cond
 private:
-    typedef scope_check< Func, Cond > base_type;
+    typedef scope_exit< Func, Cond > base_type;
 
 //! \endcond
 public:

include/boost/scope/scope_success.hpp

@@ -17,7 +17,7 @@
 #include <type_traits>
 #include <boost/scope/detail/config.hpp>
 #include <boost/scope/exception_checker.hpp>
-#include <boost/scope/scope_check.hpp>
+#include <boost/scope/scope_exit.hpp>
 #include <boost/scope/detail/is_not_like.hpp>
 #include <boost/scope/detail/type_traits/conjunction.hpp>
 #include <boost/scope/detail/type_traits/is_invocable.hpp>
@@ -103,19 +103,19 @@ class logical_not
  * due to an exception - the action function object will only be called if
  * the scope is left normally.
  *
- * \sa scope_check
+ * \sa scope_exit
  * \sa scope_fail
  *
  * \tparam Func Scope guard action function object type.
  * \tparam Cond Scope guard failure condition function object type.
  */
 template< typename Func, typename Cond = exception_checker >
 class scope_success :
-    public scope_check< Func, detail::logical_not< Cond > >
+    public scope_exit< Func, detail::logical_not< Cond > >
 {
 //! \cond
 private:
-    typedef scope_check< Func, detail::logical_not< Cond > > base_type;
+    typedef scope_exit< Func, detail::logical_not< Cond > > base_type;
 
 //! \endcond
 public:

test/Jamfile

@@ -36,6 +36,7 @@ project
             cxx11_lambdas
             cxx11_auto_declarations
             cxx11_unified_initialization_syntax
+            cxx11_hdr_system_error
         ]
     ;