首次提交

2026-08-07 16:21:44 +08:00
parent 396311246c
commit 1e903dfe1e
33 changed files with 5960 additions and 1 deletions
@@ -0,0 +1,51 @@
+#include <structive/property/property.hpp>
+#include <iostream>
+#include <string>
+using namespace structive;
+struct Device : Property_Object<Device> {
+    double temperature{25.0};
+    double pressure{101.3};
+    double min_speed{10.0};
+    double max_speed{100.0};
+    std::string name{"device-1"};
+};
+template <>
+struct structive::Type_Descriptor<Device> {
+    static auto get() {
+        return object<Device>(
+            defaults(external_access<External_Access::read_write>, persistence_access<Persistence_Access::load_store>),
+            synchronization(sync_all_independent, sync_group<&Device::min_speed, &Device::max_speed>("speed_range")),
+            field<&Device::temperature>(key<"temperature">, unit<"C">, min_value<-50.0>, max_value<200.0>),
+            field<&Device::pressure>(key<"pressure">, unit<"kPa">),
+            field<&Device::min_speed>(key<"min_speed">),
+            field<&Device::max_speed>(key<"max_speed">),
+            field<&Device::name>(key<"name">)
+        );
+    }
+};
+static bool update_speed_range(Device& device, double min_speed, double max_speed) {
+    auto guard = device.lock_unique<&Device::min_speed, &Device::max_speed>();
+    auto old_min = guard.get<&Device::min_speed>();
+    auto old_max = guard.get<&Device::max_speed>();
+    guard.set < &Device::min_speed > (min_speed);
+    guard.set < &Device::max_speed > (max_speed);
+    if (min_speed <= max_speed) {
+        return true;
+    }
+    guard.set < &Device::min_speed > (old_min);
+    guard.set < &Device::max_speed > (old_max);
+    return false;
+}
+int main() {
+    Device device;
+    device.external().write < &Device::temperature > (30.0);
+    std::cout << "temperature=" << device.external().read<&Device::temperature>() << '\n';
+    std::cout << "temperature lock slot=" << device.lock_slot<&Device::temperature>() << '\n';
+    std::cout << "min/max shared slot=" << device.lock_slot<&Device::min_speed>() << '\n';
+    std::cout << "max_speed key=" << device.schema().property<&Device::max_speed>().key() << '\n';
+    if (!update_speed_range(device, 120.0, 80.0)) {
+        std::cout << "invalid range rolled back by business logic\n";
+    }
+    device.temperature = 31.0;
+    std::cout << "raw temperature=" << device.temperature << '\n';
+}