为什么在运行Boost代码时总是收到警告？

Question

当我从Boost网站运行代码示例时，我注意到我收到了大量的警告。例如，这个程序：

#include <cassert>
#include <string>
#include <boost/iostreams/device/back_inserter.hpp>
#include <boost/iostreams/filtering_stream.hpp>

namespace io = boost::iostreams;

int main()
{
    using namespace std;

    string                 result;
    io::filtering_ostream  out(io::back_inserter(result));
    out << "Hello World!";
    out.flush();
    std::cout << result;
}

这些是我得到的警告(我已经取出了大部分的血液和内脏)：

warning: declaration of 'close' shadows a member of 'this' [-Wshadow]
warning: declaration of 'ptr' shadows a member of 'this' [-Wshadow]
warning: declaration of 'close' shadows a member of 'this' [-Wshadow]
warning: declaration of 'next' shadows a member of 'this' [-Wshadow]
warning: declaration of 'component_type' shadows a member of 'this' [-Wshadow]
warning: declaration of 'close' shadows a member of 'this' [-Wshadow]
warning: declaration of 'component_type' shadows a member of 'this' [-Wshadow]
warning: declaration of 'next' shadows a member of 'this' [-Wshadow]
warning: declaration of 'close' shadows a member of 'this' [-Wshadow]
warning: declaration of 'next' shadows a member of 'this' [-Wshadow]
warning: declaration of 'close' shadows a member of 'this' [-Wshadow]

为什么会发生这种情况？我在安装助推器时可能做错了什么吗？

Answer 1

不仅仅是你。其他人也对这一问题进行了已报告。不过，您的代码很好。

Answer 2

这很可能只是意味着编译器实现了更严格的警告。

如果支持编译器版本/平台，上游将(通常)修复这些编译器的代码。

您通常可以通过执行以下操作来隐藏系统标头的警告。

-isystem /path/to/boost

(即代替-I /path/to/boost)