How to build and user ponder with windows7?

[acyyhaa]

I want to build ponder for visual studio 2019

[billyquith]

What is stopping you from doing that?

[thegoodtgg]

I also failed to build ponder-v3.0.0 on visual studio 2019. Then I tried to build it on visual studio 2015 and it also failed. The error happened while building the "args.cpp".
I think it failed on forward declaration for "ponder::Value". Then I digged into source then find that "ponder::Value" dependent on "ponder::UserObject", "ponder::UserObject" dependent on "ponder::Args" and "ponder::Value", "ponder::Args" dependent on "Ponder::Value". So @billyquith used forward declaration in the "args.hpp" for "ponder::Value".
However, I don't understand how std::vector instantiate while missing "ponder::Value" definition.

1>args.cpp
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\vector(1279): error C2036: 'const ponder::Value *': unknown size
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\vector(1276): note: while compiling class template member function 'void std::vector<ponder::Value,std::allocator<_Ty>>::push_back(const ponder::Value &)'
1> with
1> [
1> _Ty=ponder::Value
1> ]
1>D:\third-party\C++\common\reflection\ponder-3.0.0\src\args.cpp(63): note: see reference to function template instantiation 'void std::vector<ponder::Value,std::allocator<_Ty>>::push_back(const ponder::Value &)' being compiled
1> with
1> [
1> _Ty=ponder::Value
1> ]
1>D:\third-party\C++\common\reflection\ponder-3.0.0\include\ponder/args.hpp(143): note: see reference to class template instantiation 'std::vector<ponder::Value,std::allocator<_Ty>>' being compiled
1> with
1> [
1> _Ty=ponder::Value
1> ]
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\vector(1285): error C2036: 'ponder::Value *': unknown size
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\vector(1294): error C2036: 'ponder::Value *': unknown size
1>C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\vector(1296): error C2036: 'ponder::Value *': unknown size

[thegoodtgg]

I try the code below. It do failed.

`
// Foo.h
#pragma once
struct Foo {
int v_;
}

// FooList.h
#pragma once
#include

struct Foo;
struct FooList {
void push_back(Foo &f);

std::vector<Foo> vec_foo_;

};

// FooList.cpp
#include "FooList.hpp"
#include "Foo.hpp"

void FooList::push_back(Foo &f) {
vec_foo_.push_back(f);
}

// main.cpp
#include "FooList.hpp"

int main(int argc, char **argv) {
FooList list;
return 0;
}
`