From 1d6b732496f396217e4dcb1c5861713b8d9cbcc7 Mon Sep 17 00:00:00 2001
From: Christoph Purrer <chpurrer@meta.com>
Date: Tue, 25 Oct 2022 12:32:30 -0700
Subject: [PATCH] react-native bridging > Add support for std::set

Summary:
There are use cases in which we want to pass a set of unique elements from C++ to JS and back. We can do this simple by re-using a plain JS array for these purposes.

Changelog:
[Internal][Added] react-native bridging > Add support for std::set

Reviewed By: cipolleschi

Differential Revision: D40668244

fbshipit-source-id: d06603440569e5f760c2859a54cf6e4232c7d97a
---
 ReactCommon/react/bridging/Array.h            | 19 +++++++++++++++++++
 .../react/bridging/tests/BridgingTest.cpp     |  6 ++++++
 2 files changed, 25 insertions(+)

diff --git a/ReactCommon/react/bridging/Array.h b/ReactCommon/react/bridging/Array.h
index 330e2e1a4f8b6f..af36c392d06af7 100644
--- a/ReactCommon/react/bridging/Array.h
+++ b/ReactCommon/react/bridging/Array.h
@@ -13,6 +13,7 @@
 #include <deque>
 #include <initializer_list>
 #include <list>
+#include <set>
 #include <tuple>
 #include <utility>
 #include <vector>
@@ -105,4 +106,22 @@ struct Bridging<std::vector<T>>
   }
 };
 
+template <typename T>
+struct Bridging<std::set<T>> : array_detail::BridgingDynamic<std::set<T>> {
+  static std::set<T> fromJs(
+      facebook::jsi::Runtime &rt,
+      const jsi::Array &array,
+      const std::shared_ptr<CallInvoker> &jsInvoker) {
+    size_t length = array.length(rt);
+
+    std::set<T> set;
+    for (size_t i = 0; i < length; i++) {
+      set.insert(
+          bridging::fromJs<T>(rt, array.getValueAtIndex(rt, i), jsInvoker));
+    }
+
+    return set;
+  }
+};
+
 } // namespace facebook::react
diff --git a/ReactCommon/react/bridging/tests/BridgingTest.cpp b/ReactCommon/react/bridging/tests/BridgingTest.cpp
index 0e2a99d38f3b72..a1f50fec988833 100644
--- a/ReactCommon/react/bridging/tests/BridgingTest.cpp
+++ b/ReactCommon/react/bridging/tests/BridgingTest.cpp
@@ -431,6 +431,8 @@ TEST_F(BridgingTest, supportTest) {
   EXPECT_TRUE((bridging::supportsFromJs<std::string>));
   EXPECT_TRUE((bridging::supportsFromJs<std::string, jsi::String>));
   EXPECT_TRUE((bridging::supportsFromJs<std::string, jsi::String &>));
+  EXPECT_TRUE((bridging::supportsFromJs<std::set<int>, jsi::Array>));
+  EXPECT_TRUE((bridging::supportsFromJs<std::set<int>, jsi::Array &>));
   EXPECT_TRUE((bridging::supportsFromJs<std::vector<int>, jsi::Array>));
   EXPECT_TRUE((bridging::supportsFromJs<std::vector<int>, jsi::Array &>));
   EXPECT_TRUE(
@@ -453,6 +455,8 @@ TEST_F(BridgingTest, supportTest) {
   EXPECT_FALSE((bridging::supportsFromJs<double, jsi::Object &>));
   EXPECT_FALSE((bridging::supportsFromJs<std::string, jsi::Object>));
   EXPECT_FALSE((bridging::supportsFromJs<std::string, jsi::Object &>));
+  EXPECT_FALSE((bridging::supportsFromJs<std::set<int>, jsi::String>));
+  EXPECT_FALSE((bridging::supportsFromJs<std::set<int>, jsi::String &>));
   EXPECT_FALSE((bridging::supportsFromJs<std::vector<int>, jsi::String>));
   EXPECT_FALSE((bridging::supportsFromJs<std::vector<int>, jsi::String &>));
 
@@ -494,6 +498,8 @@ TEST_F(BridgingTest, supportTest) {
   EXPECT_TRUE((bridging::supportsToJs<double>));
   EXPECT_TRUE((bridging::supportsToJs<std::string>));
   EXPECT_TRUE((bridging::supportsToJs<std::string, jsi::String>));
+  EXPECT_TRUE((bridging::supportsToJs<std::set<int>>));
+  EXPECT_TRUE((bridging::supportsToJs<std::set<int>, jsi::Array>));
   EXPECT_TRUE((bridging::supportsToJs<std::vector<int>>));
   EXPECT_TRUE((bridging::supportsToJs<std::vector<int>, jsi::Array>));
   EXPECT_TRUE((bridging::supportsToJs<std::map<std::string, int>>));