More tests

test/cereal_specialize_enums.cpp

@@ -0,0 +1,110 @@
+#include <cassert>
+#include <cstdio>
+#include <fstream>
+#include <string>
+#include <unordered_map>
+
+#include <cereal/archives/json.hpp>
+#include <cereal/types/string.hpp>
+#include <cereal/types/unordered_map.hpp>
+#include <magic_enum.hpp>
+
+enum class Keys {
+    blue,
+    green,
+    yellow,
+    orange,
+    red,
+};
+
+enum Values {
+    YES,
+    NO,
+    MAYBE
+};
+
+namespace cereal {
+    template <
+        class Archive,
+        traits::EnableIf<traits::is_text_archive<Archive>::value> = traits::sfinae
+    > inline
+    void save(Archive& ar, const std::unordered_map<Keys, Values>& map ) {
+        for(auto&& i : magic_enum::enum_entries<Keys>()) {
+            auto it = map.find(i.first);
+            if (it != map.end()) {
+                ar(
+                    cereal::make_nvp(
+                        std::string{i.second},
+                        std::string{magic_enum::enum_name(it->second)}
+                    )
+                );
+            }
+        }
+    }
+
+    template <
+        class Archive,
+        traits::EnableIf<traits::is_text_archive<Archive>::value> = traits::sfinae
+    > inline
+    void load(Archive& ar, std::unordered_map<Keys, Values>& map ) {
+        map.clear();
+        while(true) {
+            const auto namePtr = ar.getNodeName();
+            if (not namePtr) {
+                break;
+            }
+            std::string key_str = namePtr;
+            std::string value_str;
+            ar(value_str);
+
+            auto key = magic_enum::enum_cast<Keys>(key_str);
+            if (not key.has_value()) {
+                throw std::runtime_error("Invalid Key : "+key_str);
+            }
+
+            auto value = magic_enum::enum_cast<Values>(value_str);
+            if (not value.has_value()) {
+                throw std::runtime_error("Invalid Value : "+value_str);
+            }
+
+            map.emplace(*key, *value);
+        }
+    }
+} // namespace cereal
+
+struct MyThingWithAnUnorderedMap {
+    std::unordered_map<Keys, Values> m_map;
+};
+
+struct Indirect {
+    MyThingWithAnUnorderedMap m;
+
+    template<class Archive>
+    void serialize(Archive & archive) {
+        archive(
+            cereal::make_nvp("map", m.m_map)
+        ); 
+    }
+};
+
+int main(int argc, char const *argv[]) {
+    Indirect ref;
+    ref.m.m_map = {{Keys::blue, YES}, {Keys::green, MAYBE}};
+    {
+        std::ofstream file;
+        file.open("cereal_test_specialize_enums.json", std::ofstream::trunc | std::ofstream::out);
+        cereal::JSONOutputArchive archive{file};
+        archive(ref);
+    }
+
+    Indirect test;
+    {
+        std::ifstream file;
+        file.open("cereal_test_specialize_enums.json", std::ifstream::in);
+        cereal::JSONInputArchive archive{file};
+        archive(test);
+    }
+    assert((ref.m.m_map == test.m.m_map));
+    std::remove("cereal_test_specialize_enums.json");
+    return 0;
+}

test/cereal_unordered_map.cpp

@@ -1,3 +1,5 @@
+#include <cassert>
+#include <cstdio>
 #include <fstream>
 #include <string>
 #include <unordered_map>
@@ -52,8 +54,7 @@ int main(int argc, char const *argv[]) {
         cereal::JSONInputArchive archive{file};
         archive(test);
     }
-    if (ref.m.m_map != test.m.m_map) {
-        return -1;
-    }
+    assert((ref.m.m_map == test.m.m_map));
+    std::remove("cereal_test_specialize_enums.json");
     return 0;
 }

test/meson.build

@@ -1,7 +1,13 @@
-cereal_unordered_map = executable(
-    'cereal_unordered_map',
-    'cereal_unordered_map.cpp',
-    include_directories : inc
-)
+test_files = [
+    'cereal_specialize_enums.cpp',
+    'cereal_unordered_map.cpp'
+]
 
-test('cereal unordered_map test', cereal_unordered_map)
+foreach test_file : test_files
+    test_executable = executable(
+        test_file+'.out',
+        test_file,
+        include_directories : inc
+    )
+    test(test_file+' test', test_executable)
+endforeach