Move field accessors from Value to Struct in C++

api/sixtyfps-cpp/include/sixtyfps_interpreter.h

@@ -73,6 +73,9 @@ public:
     iterator end() const;
 #endif
 
+    inline std::optional<Value> get_field(std::string_view name) const;
+    inline void set_field(std::string_view name, const Value &value);
+
     // internal
     Struct(const sixtyfps::cbindgen_private::StructOpaque &other)
     {
@@ -117,11 +120,6 @@ public:
 
     using Type = cbindgen_private::ValueType;
 
-    // only works on Type::Struct
-    std::optional<Value> get_field(std::string_view) const;
-    // only works on Type::Struct
-    bool set_field(std::string_view, Value); // returns false if Value is not a Struct
-
     // optional<int> to_int() const;
     // optional<float> to_float() const;
     std::optional<double> to_number() const
@@ -187,9 +185,13 @@ public:
 
     Type type() const { return cbindgen_private::sixtyfps_interpreter_value_type(&inner); }
 
+    // internal
+    Value(const sixtyfps::cbindgen_private::ValueOpaque &inner) : inner(inner) { }
+
 private:
     using ValueOpaque = sixtyfps::cbindgen_private::ValueOpaque;
     ValueOpaque inner;
+    friend class Struct;
 };
 
 inline Value::Value(const sixtyfps::SharedVector<Value> &array)
@@ -206,17 +208,18 @@ inline std::optional<sixtyfps::SharedVector<Value>> Value::to_array() const
         return {};
     }
 }
-inline Value::Value(const std::shared_ptr<sixtyfps::Model<Value>> &model) {
+inline Value::Value(const std::shared_ptr<sixtyfps::Model<Value>> &model)
+{
     using cbindgen_private::ModelAdaptorVTable;
     using vtable::VRef;
-    struct ModelWrapper : AbstractRepeaterView {
+    struct ModelWrapper : AbstractRepeaterView
+    {
         std::shared_ptr<sixtyfps::Model<Value>> model;
         cbindgen_private::ModelNotifyOpaque notify;
-        // This kind of mean that the rust code has ownership of "this" until the drop funciton is called
+        // This kind of mean that the rust code has ownership of "this" until the drop funciton is
+        // called
         std::shared_ptr<AbstractRepeaterView> self;
-        ~ModelWrapper() {
+        ~ModelWrapper() { cbindgen_private::sixtyfps_interpreter_model_notify_destructor(&notify); }
-            cbindgen_private::sixtyfps_interpreter_model_notify_destructor(&notify);
-        }
 
         void row_added(int index, int count) override
         {
@@ -250,7 +253,8 @@ inline Value::Value(const std::shared_ptr<sixtyfps::Model<Value>> &model) {
         Value v = *reinterpret_cast<const Value *>(value);
         reinterpret_cast<ModelWrapper *>(self.instance)->model->set_row_data(row, v);
     };
-    auto get_notify = [](VRef<ModelAdaptorVTable> self) -> const cbindgen_private::ModelNotifyOpaque* {
+    auto get_notify =
+            [](VRef<ModelAdaptorVTable> self) -> const cbindgen_private::ModelNotifyOpaque * {
         return &reinterpret_cast<ModelWrapper *>(self.instance)->notify;
     };
     auto drop = [](vtable::VRefMut<ModelAdaptorVTable> self) {
@@ -262,4 +266,25 @@ inline Value::Value(const std::shared_ptr<sixtyfps::Model<Value>> &model) {
     cbindgen_private::sixtyfps_interpreter_value_new_model(wrap, &inner);
 }
 
+inline std::optional<Value> Struct::get_field(std::string_view name) const
+{
+    cbindgen_private::Slice<uint8_t> name_view {
+        const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(name.data())),
+        name.size()
+    };
+    if (auto *value = cbindgen_private::sixtyfps_interpreter_struct_get_field(&inner, name_view)) {
+        return *value;
+    } else {
+        return {};
+    }
+}
+inline void Struct::set_field(std::string_view name, const Value &value)
+{
+    cbindgen_private::Slice<uint8_t> name_view {
+        const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(name.data())),
+        name.size()
+    };
+    cbindgen_private::sixtyfps_interpreter_struct_set_field(&inner, name_view, &value.inner);
+}
+
 }

api/sixtyfps-cpp/tests/tests.cpp

@@ -128,10 +128,12 @@ SCENARIO("Value API")
     SECTION("Construct a model")
     {
         // And test that it is properly destroyed when the value is destroyed
-        struct M : sixtyfps::VectorModel<Value> {
+        struct M : sixtyfps::VectorModel<Value>
+        {
             bool *destroyed;
             explicit M(bool *destroyed) : destroyed(destroyed) { }
-            void play() {
+            void play()
+            {
                 this->push_back(Value(4.));
                 this->set_row_data(0, Value(9.));
             }
@@ -155,3 +157,18 @@ SCENARIO("Value API")
     }
 }
 
+SCENARIO("Struct API")
+{
+    using namespace sixtyfps::interpreter;
+    Struct struc;
+
+    REQUIRE(!struc.get_field("not_there"));
+
+    struc.set_field("field_a", Value(true));
+
+    auto value_opt = struc.get_field("field_a");
+    REQUIRE(value_opt.has_value());
+    auto value = value_opt.value();
+    REQUIRE(value.to_bool().has_value());
+    REQUIRE(value.to_bool().value() == true);
+}