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

Change-Id: I9636a41ad44b4218293833fd3e9456d9b07c731b

third_party/immer/example/CMakeLists.txt

@@ -0,0 +1,17 @@
+
+#  Targets
+#  =======
+
+add_custom_target(examples
+  COMMENT "Build all examples.")
+add_dependencies(check examples)
+
+file(GLOB_RECURSE immer_examples "*.cpp")
+foreach(_file IN LISTS immer_examples)
+  immer_target_name_for(_target _output "${_file}")
+  add_executable(${_target} EXCLUDE_FROM_ALL "${_file}")
+  add_dependencies(examples ${_target})
+  set_target_properties(${_target} PROPERTIES OUTPUT_NAME ${_output})
+  target_link_libraries(${_target} PUBLIC immer-dev)
+  add_test("example/${_output}" ${_output})
+endforeach()