namespace filesystem.

CMakeLists.txt

@@ -51,10 +51,13 @@ endif()
 
 if(CXX_STD_FILESYSTEM_NAMESPACE)
 	set(FS_NAMESPACE "std::filesystem")
+	set(IMPORT_FS_NAMESPACE "namespace filesystem = std::filesystem;")
 elseif(CXX_HAVE_EXPERIMENTAL_FILESYSTEM)
 	set(FS_NAMESPACE "std::experimental::filesystem")
+	set(IMPORT_FS_NAMESPACE "namespace filesystem = std::experimental::filesystem;")
 else()
 	set(FS_NAMESPACE "filesystem")
+	set(IMPORT_FS_NAMESPACE " ")
 endif()
 
 configure_file(filesystem.h.in ${CMAKE_CURRENT_SOURCE_DIR}/filesystem.h)

filesystem.h

@@ -1,6 +1,10 @@
 /* default header.  will be replaced if CMake is used. */
+/* use git update-index --assume-unchanged filesystem.h to ignore changes */
 
 #define FS_HEADER "cxx_filesystem.h"
 #define FS_NAMESPACE filesystem
+#define IMPORT_FS_NAMESPACE  
 
 #include FS_HEADER
+
+IMPORT_FS_NAMESPACE

filesystem.h.in

@@ -1,6 +1,10 @@
 /* auto-generated by CMake from filesystem.h.in */
+/* use git update-index --assume-unchanged filesystem.h to ignore changes */
 
 #cmakedefine FS_HEADER @FS_HEADER@
 #cmakedefine FS_NAMESPACE @FS_NAMESPACE@
+#cmakedefine IMPORT_FS_NAMESPACE @IMPORT_FS_NAMESPACE@
 
 #include FS_HEADER
+
+IMPORT_FS_NAMESPACE

mapped_file.h

@@ -12,6 +12,7 @@ class mapped_file_base {
 	typedef FS_NAMESPACE::path path_type;
 
 	enum mapmode { readonly, readwrite, priv };
+	enum createmode { truncate, exclusive };
 
 	void close();