将std::ref()用于nvcc时，类没有成员“second_argument_type

Question

我试图用cuda 7.5.18和gcc 5.4.0用nvcc编译一个c++文件，但遇到了错误。举个简单的例子：

#include <thrust/functional.h>

struct test_struct {
    //..
}

void f(test_struct& a) {
    //..
}

int main() {
    test_struct a;
    std::function<void()> bound_f = std::bind(f, std::ref(a));
}

使用nvcc -c -std=c++11 test.cu -o test.o编译此代码会导致以下错误输出：

/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/c++/functional(78): error: class "test_struct" has no member "result_type"
          detected during:
            instantiation of class "std::_Maybe_get_result_type<_Functor, void> [with _Functor=test_struct]" 
(86): here
            instantiation of class "std::_Weak_result_type_impl<_Functor> [with _Functor=test_struct]" 
(184): here
            instantiation of class "std::_Weak_result_type<_Functor> [with _Functor=test_struct]" 
(264): here
            instantiation of class "std::_Reference_wrapper_base_impl<true, true, _Tp> [with _Tp=test_struct]" 
(283): here
            instantiation of class "std::_Reference_wrapper_base<_Tp> [with _Tp=test_struct]" 
(399): here
            instantiation of class "std::reference_wrapper<_Tp> [with _Tp=test_struct]" 
test.cu(14): here

/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/c++/functional(266): error: class "test_struct" has no member "argument_type"
          detected during:
            instantiation of class "std::_Reference_wrapper_base_impl<true, true, _Tp> [with _Tp=test_struct]" 
(283): here
            instantiation of class "std::_Reference_wrapper_base<_Tp> [with _Tp=test_struct]" 
(399): here
            instantiation of class "std::reference_wrapper<_Tp> [with _Tp=test_struct]" 
test.cu(14): here

/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/c++/functional(267): error: class "test_struct" has no member "first_argument_type"
          detected during:
            instantiation of class "std::_Reference_wrapper_base_impl<true, true, _Tp> [with _Tp=test_struct]" 
(283): here
            instantiation of class "std::_Reference_wrapper_base<_Tp> [with _Tp=test_struct]" 
(399): here
            instantiation of class "std::reference_wrapper<_Tp> [with _Tp=test_struct]" 
test.cu(14): here

/usr/lib/gcc/x86_64-pc-linux-gnu/5.4.0/include/c++/functional(268): error: class "test_struct" has no member "second_argument_type"
          detected during:
            instantiation of class "std::_Reference_wrapper_base_impl<true, true, _Tp> [with _Tp=test_struct]" 
(283): here
            instantiation of class "std::_Reference_wrapper_base<_Tp> [with _Tp=test_struct]" 
(399): here
            instantiation of class "std::reference_wrapper<_Tp> [with _Tp=test_struct]" 
test.cu(14): here

5 errors detected in the compilation of "/tmp/tmpxft_00003b29_00000000-7_test.cpp1.ii".

我找不到任何与error: ... has no member "second_argument_type"等行相关的nvcc，所以我完全一无所知。显然，不知何故找不到std::function的类成员(参见here)。

我能做些什么来解决这个问题？

Answer 1

错误的原因尚不清楚，但您可以轻松地使用lambda：

std::function<void()> bound_f = [&a](){ return f(a); };