[struct_pack] how to support QString and QTL of Qt

[xiaocai123123]

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• I searched the issues and found no similar issues.

What happened + What you expected to happen

When i use struct_pack to serialized a struct like below
struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
An error occurred during compile when i use struct_pack::serializestd::string(Test)：1.If the struct is empty,which is not allowed in struct_pack type system.

Reproduction way

Anything else

Are you willing to submit a PR?

• Yes I am willing to submit a PR!

[poor-circle]

struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
template <>
constexpr std::size_t struct_pack::members_count<Test> = 3;

Could you try this?

[xiaocai123123]

It’s not working.
I think I'm using the Qt third-party library data type like QString、QVector、QMap, and I don't know how to integrate it with struct_pack.
Maybe i can only use std::string、std::vector、std::map

[poor-circle]

It’s not working. I think I'm using the Qt third-party library data type like QString、QVector、QMap, and I don't know how to integrate it with struct_pack. Maybe i can only use std::string、std::vector、std::map

Could you show me the error message

[poor-circle]

It’s not working. I think I'm using the Qt third-party library data type like QString、QVector、QMap, and I don't know how to integrate it with struct_pack. Maybe i can only use std::string、std::vector、std::map

Here is a example of support third-party type:

https://alibaba.github.io/yalantinglibs/en/struct_pack/struct_pack_intro.html#the-type-cannot-be-abstracted-to-a-type-already-in-the-type-system-1

[poor-circle]

You can add the helper function in QT namespace to support Qstring/QVector/QMap.

[xiaocai123123]

The error message was
"1. If the struct is empty, which is not allowed in struct_pack type system.\n"
"2. If the strut is not empty, it means struct_pack can't calculate your struct members' count. You can use macro STRUCT_PACK_REFL(Typename, field1, field2...)."

Yes! I am learning how to integrate third party library types and it is a learning process. Thanks a lot!

[poor-circle]

The error message was "1. If the struct is empty, which is not allowed in struct_pack type system.\n" "2. If the strut is not empty, it means struct_pack can't calculate your struct members' count. You can use macro STRUCT_PACK_REFL(Typename, field1, field2...)."

Yes! I am learning how to integrate third party library types and it is a learning process. Thanks a lot!

Or you can try this:

struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
STRUCT_PACK_REFL(Test, str, iArray, name2Sb);

[xiaocai123123]

The error message was "1. If the struct is empty, which is not allowed in struct_pack type system.\n" "2. If the strut is not empty, it means struct_pack can't calculate your struct members' count. You can use macro STRUCT_PACK_REFL(Typename, field1, field2...)."
Yes! I am learning how to integrate third party library types and it is a learning process. Thanks a lot!

Or you can try this:

struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
STRUCT_PACK_REFL(Test, str, iArray, name2Sb);

I registered QString、QVector、QMap with sp_get_needed_size、sp_serialize_to、sp_deserialize_to,and used STRUCT_PACK_REFL(Test, str, iArray, name2Sb);
It`s good work with struct_packderialize(),but an error occurred during compile when i use
std::ofstream writer("struct_pack_demo.data"), std::ofstream::out|std::ofstream::binary);
struct_pack::serialize_to(writer, test);

The complier error message: read_bytes_array Cannot find identifier(找不到标识符)
I think I still need to implement some else template functions

[poor-circle]

The error message was "1. If the struct is empty, which is not allowed in struct_pack type system.\n" "2. If the strut is not empty, it means struct_pack can't calculate your struct members' count. You can use macro STRUCT_PACK_REFL(Typename, field1, field2...)."
Yes! I am learning how to integrate third party library types and it is a learning process. Thanks a lot!

Or you can try this:

struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
STRUCT_PACK_REFL(Test, str, iArray, name2Sb);

I registered QString、QVector、QMap with sp_get_needed_size、sp_serialize_to、sp_deserialize_to,and used STRUCT_PACK_REFL(Test, str, iArray, name2Sb); It`s good work with struct_packderialize(),but an error occurred during compile when i use std::ofstream writer("struct_pack_demo.data"), std::ofstream::out|std::ofstream::binary); struct_pack::serialize_to(writer, test);

The complier error message: read_bytes_array Cannot find identifier(找不到标识符) I think I still need to implement some else template functions

Sorry for my late, it's a code bug, fixed by #776

[xiaocai123123]

The error message was "1. If the struct is empty, which is not allowed in struct_pack type system.\n" "2. If the strut is not empty, it means struct_pack can't calculate your struct members' count. You can use macro STRUCT_PACK_REFL(Typename, field1, field2...)."
Yes! I am learning how to integrate third party library types and it is a learning process. Thanks a lot!

Or you can try this:

struct Test
{
QString str;
QVector iArray;
QMap<QString, QString> name2Sb;
};
STRUCT_PACK_REFL(Test, str, iArray, name2Sb);

I registered QString、QVector、QMap with sp_get_needed_size、sp_serialize_to、sp_deserialize_to,and used STRUCT_PACK_REFL(Test, str, iArray, name2Sb); It`s good work with struct_packderialize(),but an error occurred during compile when i use std::ofstream writer("struct_pack_demo.data"), std::ofstream::out|std::ofstream::binary); struct_pack::serialize_to(writer, test);
The complier error message: read_bytes_array Cannot find identifier(找不到标识符) I think I still need to implement some else template functions

Sorry for my late, it's a code bug, fixed by #776

强！我更新到最新版本了，发现部分宏都改变了，源码文件也有些改动。试了一下，问题迎刃而解了。非常感谢！