 __    __   _______   __       __    __       ___      
|  |  |  | |       \ |  |     |  |  |  |     /   \     
|  |  |  | |  .--.  ||  |     |  |  |  |    /  ^  \    
|  |  |  | |  |  |  ||  |     |  |  |  |   /  /_\  \   
|  `--'  | |  '--'  ||  `----.|  `--'  |  /  _____  \  
 \______/  |_______/ |_______| \______/  /__/     \__\

⭐ Star us on GitHub — it helps!

UDLua

Ubpa Lua base on UDRefl (the "best" C++20 dynamic reflection library), which make it easy to use C++ in Lua.

Documents

todo

How to use

the example code is here

Suppose you need to use struct vec

struct vec {
  float x;
  float y;
  float norm() const { return std::sqrt(x * x + y * y); }
};

Manual registration on Lua

if you want to do it on C++, check out this link ->.

local vec = UDRefl.RegisterType({
  type = "vec",
  fields = {
    { type = "float32", name = "x" },
    { type = "float32", name = "y" },
  },
  methods = {
    {
      name = "norm",
      result = "float32",
      body = function (p)
        return math.sqrt(UDRefl.unbox(p.x * p.x + p.y * p.y))
      end
    }
  }
})

Iterate over members

for iter in ObjectView.new(vec):GetFields():__range() do
  local name, info = iter:__indirection():__tuple_bind()
  print(name:GetView())
end

for iter in ObjectView.new(vec):GetMethods():__range() do
  local name, info = iter:__indirection():__tuple_bind()
  print(name:GetView())
end

Constructing types

v = SharedObject.new(vec)
print(v:GetType():GetName()) -- prints "vec"

Set/get variables

v.x = 3
v.y = 4
print("x: " .. v.x) -- prints "3"

Invoke Methods

print("norm: " .. v:norm()) -- prints "5"

Iterate over varables

for iter in v:GetTypeFieldVars():__range() do
  local name, var = iter:__indirection():__tuple_bind()
  print(name:GetView() .. ": ".. var)
end

Compiler compatibility

Clang/LLVM >= 10.0
GCC >= 10.0
MSVC >= 1926

Tested platforms:

Windows 10: VS2019 16.8.5

Ubuntu 20: GCC 10.2, Clang 11.0

MacOS 11.0 : GCC 10.2

AppleClang 12 and Clang 11 is not supported

Does not compile (Does compile after some tweaking)

俺C++也就搬砖工水平，不太能确定这个是不是正常现象，如果这个issue显得比较蠢求轻拍（

OS: Linux Mint 20.1 x86_64
Compiler: gcc-10 (Ubuntu 10.3.0-1ubuntu1~20.04) 10.3.0
UDRefl: master(8e0c18a)
ULuaW: master(239b2fa)

> make
Scanning dependencies of target UDLua_core
[ 20%] Building CXX object src/core/CMakeFiles/UDLua_core.dir/UDLua.cpp.o
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp: In function ‘int f_meta(lua_State*)’:
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:76:48: error: expected primary-expression before ‘>’ token
   76 |     else if (functor.type.Is<UDRefl::ObjectView>()) {
      |                                                ^
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:76:50: error: expected primary-expression before ‘)’ token
   76 |     else if (functor.type.Is<UDRefl::ObjectView>()) {
      |                                                  ^
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:80:50: error: expected primary-expression before ‘>’ token
   80 |     else if (functor.type.Is<UDRefl::SharedObject>()) {
      |                                                  ^
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:80:52: error: expected primary-expression before ‘)’ token
   80 |     else if (functor.type.Is<UDRefl::SharedObject>()) {
      |                                                    ^
In file included from /usr/include/c++/10/memory:63,
                 from /usr/Ubpa/ULuaW_0_1_1/include/ULuaW/LuaState.h:5,
                 from /usr/Ubpa/ULuaW_0_1_1/include/ULuaW/ULuaW.h:3,
                 from /home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/Util.h:3,
                 from /home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:3:
/usr/include/c++/10/bits/stl_algobase.h: In instantiation of ‘constexpr _Iterator std::__find_if(_Iterator, _Iterator, _Predicate) [with _Iterator = Ubpa::UDRefl::MethodRange::iterator; _Predicate = __gnu_cxx::__ops::_Iter_pred<f_ObjectView_index(lua_State*)::<lambda(Ubpa::UDRefl::ObjectView, Ubpa::Name)>::<lambda(const auto:42&)> >]’:
/usr/include/c++/10/bits/stl_algo.h:3934:28:   required from ‘constexpr _IIter std::find_if(_IIter, _IIter, _Predicate) [with _IIter = Ubpa::UDRefl::MethodRange::iterator; _Predicate = f_ObjectView_index(lua_State*)::<lambda(Ubpa::UDRefl::ObjectView, Ubpa::Name)>::<lambda(const auto:42&)>]’
/home/ikigai/SoftData/libs/ubpa-multi/UDLua/src/core/UDLua.cpp:407:4:   required from here
/usr/include/c++/10/bits/stl_algobase.h:1974:23: error: no matching function for call to ‘__find_if(Ubpa::UDRefl::MethodRange::iterator&, Ubpa::UDRefl::MethodRange::iterator&, __gnu_cxx::__ops::_Iter_pred<f_ObjectView_index(lua_State*)::<lambda(Ubpa::UDRefl::ObjectView, Ubpa::Name)>::<lambda(const auto:42&)> >&, std::__iterator_traits<Ubpa::UDRefl::MethodRange::iterator, void>::iterator_category)’
 1974 |       return __find_if(__first, __last, __pred,
      |              ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
 1975 |          std::__iterator_category(__first));
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1909:5: note: candidate: ‘template<class _InputIterator, class _Predicate> constexpr _InputIterator std::__find_if(_InputIterator, _InputIterator, _Predicate, std::input_iterator_tag)’
 1909 |     __find_if(_InputIterator __first, _InputIterator __last,
      |     ^~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1909:5: note:   template argument deduction/substitution failed:
/usr/include/c++/10/bits/stl_algobase.h:1975:34: note:   cannot convert ‘std::__iterator_category<Ubpa::UDRefl::MethodRange::iterator>(__first)’ (type ‘std::__iterator_traits<Ubpa::UDRefl::MethodRange::iterator, void>::iterator_category’ {aka ‘std::output_iterator_tag’}) to type ‘std::input_iterator_tag’
 1975 |          std::__iterator_category(__first));
      |          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1921:5: note: candidate: ‘template<class _RandomAccessIterator, class _Predicate> constexpr _RandomAccessIterator std::__find_if(_RandomAccessIterator, _RandomAccessIterator, _Predicate, std::random_access_iterator_tag)’
 1921 |     __find_if(_RandomAccessIterator __first, _RandomAccessIterator __last,
      |     ^~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1921:5: note:   template argument deduction/substitution failed:
/usr/include/c++/10/bits/stl_algobase.h:1975:34: note:   cannot convert ‘std::__iterator_category<Ubpa::UDRefl::MethodRange::iterator>(__first)’ (type ‘std::__iterator_traits<Ubpa::UDRefl::MethodRange::iterator, void>::iterator_category’ {aka ‘std::output_iterator_tag’}) to type ‘std::random_access_iterator_tag’
 1975 |          std::__iterator_category(__first));
      |          ~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1972:5: note: candidate: ‘template<class _Iterator, class _Predicate> constexpr _Iterator std::__find_if(_Iterator, _Iterator, _Predicate)’
 1972 |     __find_if(_Iterator __first, _Iterator __last, _Predicate __pred)
      |     ^~~~~~~~~
/usr/include/c++/10/bits/stl_algobase.h:1972:5: note:   template argument deduction/substitution failed:
/usr/include/c++/10/bits/stl_algobase.h:1974:23: note:   candidate expects 3 arguments, 4 provided
 1974 |       return __find_if(__first, __last, __pred,
      |              ~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
 1975 |          std::__iterator_category(__first));
      |          ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
make[2]: *** [src/core/CMakeFiles/UDLua_core.dir/build.make:63: src/core/CMakeFiles/UDLua_core.dir/UDLua.cpp.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:115: src/core/CMakeFiles/UDLua_core.dir/all] Error 2
make: *** [Makefile:152: all] Error 2

My tweaks:

UDLua.cpp 76:
- else if (functor.type.Is<UDRefl::ObjectView>()) {
+ else if (functor.type.template Is<UDRefl::ObjectView>()) {

UDLua.cpp 80:
- else if (functor.type.Is<UDRefl::SharedObject>()) {
+ else if (functor.type.template Is<UDRefl::SharedObject>()) {

UDLua.cpp 405-407:
- return std::find_if(methods.begin(), methods.end(), [name](const auto& name_methodinfo) {
- 	return std::get<const Name>(name_methodinfo) == name;
- }) != methods.end();
+ for (auto& method : methods){
+ 	if (std::get<const Name>(method) == name){
+ 		return true;
+ 	}
+ }
+ return false;

ubpa / udlua Goto Github PK

udlua's Introduction

UDLua

Documents

How to use

Manual registration on Lua

Iterate over members

Constructing types

Set/get variables

Invoke Methods

Iterate over varables

Compiler compatibility

udlua's People

Contributors

Stargazers

Watchers

Forkers

udlua's Issues

Recommend Projects

Recommend Topics

Recommend Org