fs_path.h (path::_List): Use vector instead of list.

	* include/experimental/fs_path.h (path::_List): Use vector instead of
	list.
	* python/libstdcxx/v6/printers.py (StdExpPathPrinter): Adapt.
	* src/filesystem/path.cc: Use std::prev instead of decrementing
	rvalues. Fix whitespace.
	* testsuite/experimental/filesystem/path/decompose/parent_path.cc:
	Do not decrement iterators before begin.

From-SVN: r222702

1 files changed, 44 insertions, 9 deletions

diff --git a/libstdc++-v3/python/libstdcxx/v6/printers.py b/libstdc++-v3/python/libstdcxx/v6/printers.py
index 37c3b9b..c6f96d7 100644
--- a/libstdc++-v3/python/libstdcxx/v6/printers.py
+++ b/libstdc++-v3/python/libstdcxx/v6/printers.py
@@ -984,16 +984,51 @@ class StdExpPathPrinter:
 
     def __init__ (self, typename, val):
         self.val = val
-        self.list_visualizer = gdb.default_visualizer(val['_M_cmpts'])
+        start = self.val['_M_cmpts']['_M_impl']['_M_start']
+        finish = self.val['_M_cmpts']['_M_impl']['_M_finish']
+        self.num_cmpts = int (finish - start)
+
+    def _path_type(self):
+        t = str(self.val['_M_type'])
+        if t[-9:] == '_Root_dir':
+            return "root-directory"
+        if t[-10:] == '_Root_name':
+            return "root-name"
+        return None
 
     def to_string (self):
-        path = self.val ['_M_pathname']
-        if self.list_visualizer:
-            list_head = self.val['_M_cmpts']['_M_impl']['_M_node']
-            if list_head.address != list_head['_M_next']:
-                cmpts = self.list_visualizer.to_string()
-                path = "%s [Components %s]" % (path, cmpts)
-        return path
+        path = "%s" % self.val ['_M_pathname']
+        if self.num_cmpts == 0:
+            t = self._path_type()
+            if t:
+                path = '%s [%s]' % (path, t)
+        return "filesystem::path %s" % path
+
+    class _iterator(Iterator):
+        def __init__(self, cmpts):
+            self.item = cmpts['_M_impl']['_M_start']
+            self.finish = cmpts['_M_impl']['_M_finish']
+            self.count = 0
+
+        def __iter__(self):
+            return self
+
+        def __next__(self):
+            if self.item == self.finish:
+                raise StopIteration
+            item = self.item.dereference()
+            count = self.count
+            self.count = self.count + 1
+            self.item = self.item + 1
+            path = item['_M_pathname']
+            t = StdExpPathPrinter(item.type.name, item)._path_type()
+            if not t:
+                t = count
+            return ('[%s]' % t, path)
+
+    def children(self):
+        return self._iterator(self.val['_M_cmpts'])
+
 
 # A "regular expression" printer which conforms to the
 # "SubPrettyPrinter" protocol from gdb.printing.
@@ -1383,7 +1418,7 @@ def build_libstdcxx_dictionary ():
     # Filesystem TS components
     libstdcxx_printer.add_version('std::experimental::filesystem::v1::',
                                   'path', StdExpPathPrinter)
-    libstdcxx_printer.add_version('std::experimental::filesystem::v1::__cxx11',
+    libstdcxx_printer.add_version('std::experimental::filesystem::v1::__cxx11::',
                                   'path', StdExpPathPrinter)
 
     # Extensions.