补全边角

core/tests/compile_fail/missing_key.cpp

@@ -0,0 +1,8 @@
+#include <structive/property/property.hpp>
+struct Missing_Key {
+    int value{};
+};
+int main() {
+    auto schema = structive::object<Missing_Key>(structive::field<&Missing_Key::value>());
+    return static_cast<int>(schema.property_count);
+}