1 files changed, 20 insertions, 0 deletions
diff --git a/lib/spack/external/_vendoring/ruamel/yaml/anchor.py b/lib/spack/external/_vendoring/ruamel/yaml/anchor.py
new file mode 100644
index 0000000000..1deea78412
--- /dev/null
+++ b/lib/spack/external/_vendoring/ruamel/yaml/anchor.py
@@ -0,0 +1,20 @@
+# coding: utf-8
+if False:  # MYPY
+    from typing import Any, Dict, Optional, List, Union, Optional, Iterator  # NOQA
+
+anchor_attrib = '_yaml_anchor'
+
+
+class Anchor:
+    __slots__ = 'value', 'always_dump'
+    attrib = anchor_attrib
+
+    def __init__(self):
+        # type: () -> None
+        self.value = None
+        self.always_dump = False
+
+    def __repr__(self):
+        # type: () -> Any
+        ad = ', (always dump)' if self.always_dump else ""
+        return 'Anchor({!r}{})'.format(self.value, ad)