implement `TargetIdGenerator` in C++ for Firestore (#701)

* implement `TargetIdGenerator`

* address changes

1 files changed, 20 insertions, 0 deletions

diff --git a/Firestore/core/src/firebase/firestore/core/CMakeLists.txt b/Firestore/core/src/firebase/firestore/core/CMakeLists.txt
new file mode 100644
index 0000000..a62985c
--- /dev/null
+++ b/Firestore/core/src/firebase/firestore/core/CMakeLists.txt
@@ -0,0 +1,20 @@
+# Copyright 2018 Google
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+cc_library(
+  firebase_firestore_core
+  SOURCES
+    target_id_generator.cc
+    target_id_generator.h
+)