merge(3p/immer): Subtree merge at 'ad3e3556d' as 'third_party/immer'

Change-Id: I9636a41ad44b4218293833fd3e9456d9b07c731b

third_party/immer/doc/containers.rst

@@ -0,0 +1,50 @@
+.. highlight:: c++
+
+Containers
+==========
+
+This section describes all the containers provided by the library.
+Check the :ref:`design` section for a general discussion of these
+containers and how to use them.
+
+box
+---
+
+.. doxygenclass:: immer::box
+    :members:
+    :undoc-members:
+
+array
+-----
+
+.. doxygenclass:: immer::array
+    :members:
+    :undoc-members:
+
+vector
+------
+
+.. doxygenclass:: immer::vector
+    :members:
+    :undoc-members:
+
+flex_vector
+-----------
+
+.. doxygenclass:: immer::flex_vector
+    :members:
+    :undoc-members:
+
+set
+---
+
+.. doxygenclass:: immer::set
+    :members:
+    :undoc-members:
+
+map
+---
+
+.. doxygenclass:: immer::map
+    :members:
+    :undoc-members: