c++: Add explicit exile_launch() std::basic_string variant

exile.hpp

@@ -174,3 +174,26 @@ typename std::enable_if_t<!std::is_trivially_copyable_v<T> && std::is_copy_const
 
 }
 
+template<class T>
+std::basic_string<typename T::value_type> deserialize_stdstring(const char *buf, size_t n)
+{
+	return std::basic_string<typename T::value_type> { buf, n };
+}
+
+template<class T>
+size_t serialize_stdstring(const std::basic_string<typename T::value_type> &t, char *buf, size_t n)
+{
+	if(n < t.size())
+	{
+		return 0;
+	}
+	memcpy(buf, t.data(), t.size());
+	return t.size();
+}
+
+
+template<typename T, typename U, typename ... Args>
+std::basic_string<typename T::value_type> exile_launch(struct exile_policy *policy, U fn, Args && ... args)
+{
+	return exile_launch<T, U, Args...>(policy, &serialize_stdstring<T>, &deserialize_stdstring<T>, fn, std::forward<Args>(args) ...);
+}

test.cpp

@@ -8,21 +8,6 @@ std::string sandboxed_reverse(std::string str)
 	return str;
 }
 
-std::string deserialize_stdstring(const char *buf, size_t n)
-{
-	return std::string { buf, n };
-}
-
-size_t serialize_stdstring(const std::string &t, char *buf, size_t n)
-{
-	if(n < t.size())
-	{
-		return 0;
-	}
-	memcpy(buf, t.data(), t.size());
-	return t.size();
-}
-
 size_t stdstrlen(const std::string &str)
 {
 	return str.size();
@@ -40,15 +25,41 @@ int test_exile_launch_trivial()
 	return 0;
 }
 
-int test_exile_launch()
+int test_exile_launch_stdstring()
 {
 	std::string str = "abc123";
-	std::string reversed = exile_launch<std::string>(exile_init_policy(), &serialize_stdstring, &deserialize_stdstring, &sandboxed_reverse, str);
+	std::string reversed = exile_launch<std::string>(exile_init_policy(), &sandboxed_reverse, str);
-
 	assert(reversed == "321cba");
 	return 0;
 }
 
+struct not_trivially_copyable
+{
+public:
+	std::string somecontent;
+};
+
+int test_exile_launch_serializer()
+{
+	static_assert(! std::is_trivially_copyable_v<not_trivially_copyable>);
+
+	auto serializer = [](const not_trivially_copyable &obj, char *buf, size_t n){
+		serialize_stdstring<std::string>(obj.somecontent, buf, n);
+		return obj.somecontent.size();
+	};
+
+	auto deserializer = [](const char *buffer, size_t n) {
+		not_trivially_copyable obj;
+		obj.somecontent = deserialize_stdstring<std::string>(buffer, n);
+		return obj;
+	};
+
+	not_trivially_copyable result = exile_launch<not_trivially_copyable>(exile_init_policy(), serializer, deserializer, []() {not_trivially_copyable obj; obj.somecontent = "Just something"; return obj;});
+
+	assert(result.somecontent == "Just something");
+	return 0;
+}
+
 int main(int argc, char *argv[])
 {
 	if(argc < 2)
@@ -58,7 +69,8 @@ int main(int argc, char *argv[])
 	}
 	std::map<std::string, int (*)()> map = {
 		{ "launch-trivial-cpp", &test_exile_launch_trivial} ,
-		{ "launch-cpp", &test_exile_launch }
+		{ "launch-stdstring-cpp", &test_exile_launch_stdstring },
+		{ "launch-serializer-cpp", &test_exile_launch_serializer },
 	};
 
 	std::string test = argv[1];