Failed to compile for struct with constructors which have more than 1 arguments

[Yikai-Liao]

The following 3 cases could pass compile

struct Foo1 {
    int data;
};

struct Foo2 {
    int data;
    Foo2() = default;
};

struct Foo3 {
    int data;
    Foo3(const int data): data{data} {}
};

But once the constructor accepts more than one arugments, we will get an error, like this:

struct Foo4 {
    int data;
    Foo4() = default; // with or without it just lead to the same error
    Foo4(const int data, const bool bar): data{data} {}
}

FAILED: CMakeFiles/symusic.dir/src/io/alpaca.cpp.obj 
C:\PROGRA~1\MICROS~1\2022\COMMUN~1\VC\Tools\MSVC\1438~1.331\bin\Hostx64\x64\cl.exe  /nologo /TP -DFMT_HEADER_ONLY=1 -IC:\Users\nhy\symusic-libra\include -IC:\Users\nhy\symusic-libra\3rdparty\minimidi\include -IC:\Users\nhy\symusic-libra\3rdparty\pdqsort -IC:\Users\nhy\symusic-libra\3rdparty\zpp_bits -IC:\Users\nhy\symusic-libra\3rdparty\fmt\include -IC:\Users\nhy\symusic-libra\3rdparty\alpaca\include /DWIN32 /D_WINDOWS /EHsc /Zi /Ob0 /Od /RTC1 -std:c++20 -MDd /GL -bigobj /showIncludes /FoCMakeFiles\symusic.dir\src\io\alpaca.cpp.obj /FdCMakeFiles\symusic.dir\symusic.pdb /FS -c C:\Users\nhy\symusic-libra\src\io\alpaca.cpp
C:\Users\nhy\symusic-libra\3rdparty\alpaca\include\alpaca/detail/struct_nth_field.h(21): error C3448: the number of identifiers must match the number of array elements or members in a structured binding declaration
C:\Users\nhy\symusic-libra\3rdparty\alpaca\include\alpaca/detail/struct_nth_field.h(21): note: the template instantiation context (the oldest one first) is
C:\Users\nhy\symusic-libra\src\io\alpaca.cpp(104): note: see reference to function template instantiation 'std::vector<uint8_t,std::allocator<uint8_t>> symusic::details::serailize_alpaca<symusic::Foo4>(const symusic::Foo4 &)' being compiled
C:\Users\nhy\symusic-libra\src\io\alpaca.cpp(29): note: see reference to function template instantiation 'size_t alpaca::serialize<T,2,std::vector<uint8_t,std::allocator<uint8_t>>>(const T &,Container &)' being compiled
        with
        [
            T=symusic::Foo4,
            Container=std::vector<uint8_t,std::allocator<uint8_t>>
        ]
C:\Users\nhy\symusic-libra\3rdparty\alpaca\include\alpaca/alpaca.h(152): note: see reference to function template instantiation 'void alpaca::detail::serialize_helper<alpaca::options::none,T,2,std::vector<uint8_t,std::allocator<uint8_t>>,0>(const T &,Container &,size_t &)' being compiled
        with
        [
            T=symusic::Foo4,
            Container=std::vector<uint8_t,std::allocator<uint8_t>>
        ]
C:\Users\nhy\symusic-libra\3rdparty\alpaca\include\alpaca/alpaca.h(135): note: see reference to function template instantiation 'decltype(auto) alpaca::detail::get<0,const T&,2>(type) noexcept' being compiled
        with
        [
            T=symusic::Foo4,
            type=const symusic::Foo4 &
        ]
ninja: build stopped: subcommand failed.

Note that I'm using c++20 and msvc 19.38.33133.0 on windows11. And I have read the similar issue #24

[xgdgsc]

I also get similar error with Clang 11 and GCC 9 on linux like

 /data/include/alpaca/detail/struct_nth_field.h:14:11: error: type 'const hos::xs::Sk<float>' decomposes into 6 elements, but only 1 names were provided
[build]     auto &[p1] = value;

The only 1 names part would change to only 2 names if I change the constructor from 1 argument to 2 arguments. The struct Sk has 6 members.