C++ binding (#129)

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

bindings/cpp/CMakeLists.txt

@@ -0,0 +1,28 @@
+# Copyright (c) Microsoft
+# Licensed under the MIT License.
+
+cmake_minimum_required(VERSION 3.12 FATAL_ERROR)
+include(FetchContent)
+
+FetchContent_Declare(
+    Corrosion
+    GIT_REPOSITORY https://github.com/corrosion-rs/corrosion.git
+    GIT_TAG v0.4 # Optionally specify a commit hash, version tag or branch here
+)
+FetchContent_MakeAvailable(Corrosion)
+
+project("regorus-test")
+set(CMAKE_CXX_STANDARD 17)
+
+corrosion_import_crate(
+  # Path to <regorus-source-folder>/bindings/ffi/Cargo.toml
+  MANIFEST_PATH "../ffi/Cargo.toml"
+  # Always build regorus in Release mode.
+  PROFILE "release"
+  # Only build the "regorusc" crate.
+  CRATES "regorus-ffi")
+
+add_executable(regorus_test main.cpp)
+# Add path to <regorus-source-folder>/bindings/ffi
+target_include_directories(regorus_test PRIVATE "../ffi")
+target_link_libraries(regorus_test regorus-ffi)