meta/info: split the system info printing into a unit

CMakeLists.txt

@@ -152,6 +152,9 @@ list (APPEND sources
     swapchain.hpp
     traits.cpp
     traits.hpp
+
+    meta/info.cpp
+    meta/info.hpp
 )
 
 

meta/info.cpp

@@ -0,0 +1,41 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright:
+ *      2017-2018, Danny Robson <danny@nerdcruft.net>
+ */
+
+#include "info.hpp"
+
+#include "load/ostream.hpp"
+
+#include "instance.hpp"
+#include "physical_device.hpp"
+#include "ostream.hpp"
+
+#include "load/vendor.hpp"
+#include "load/vtable.hpp"
+
+#include <cruft/util/iterator/infix.hpp>
+
+#include <ostream>
+
+
+///////////////////////////////////////////////////////////////////////////////
+std::ostream&
+cruft::vk::meta::operator<< (std::ostream &os, info const &)
+{
+    cruft::vk::instance instance;
+
+    os << "[ "
+        << "available_layers: [ "
+        << cruft::iterator::make_infix (cruft::vk::instance::available_layers ())
+        << " ] }"
+        << ", instance: " << instance
+        << ", devices: [ " << cruft::iterator::make_infix (cruft::vk::physical_device::find (instance)) << " ], "
+        << " } ]\n";
+
+    return os;
+}

meta/info.hpp

@@ -0,0 +1,19 @@
+/*
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * Copyright:
+ *      2019, Danny Robson <danny@nerdcruft.net>
+ */
+
+#pragma once
+
+#include <iosfwd>
+
+
+namespace cruft::vk::meta {
+    struct info {};
+
+    std::ostream& operator<< (std::ostream &os, info const&);
+};

tools/info.cpp

@@ -4,36 +4,17 @@
  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
  *
  * Copyright:
- *      2017-2018, Danny Robson <danny@nerdcruft.net>
+ *      2019, Danny Robson <danny@nerdcruft.net>
  */
 
-#include <cruft/util/iterator/infix.hpp>
+#include "../meta/info.hpp"
-
-#include "load/ostream.hpp"
-#include "load/vtable.hpp"
-
-#include "instance.hpp"
-#include "physical_device.hpp"
-#include "ostream.hpp"
 
 #include <iostream>
 
 
-#include "../load/vendor.hpp"
-#include "load/vtable.hpp"
-
-
 ///////////////////////////////////////////////////////////////////////////////
 int
 main (int, char**)
 {
-    cruft::vk::instance instance;
+    std::cout << cruft::vk::meta::info {} << '\n';
-
-    std::cout << "[ "
-        << "available_layers: [ "
-            << cruft::iterator::make_infix (cruft::vk::instance::available_layers ())
-        << " ] }"
-        << ", instance: " << instance
-        << ", devices: [ " << cruft::iterator::make_infix (cruft::vk::physical_device::find (instance)) << " ], "
-        << " } ]\n";
 }