c++ - 没有名为_M_impl的成员或方法，如何使用pvector打印clang++和libc++编译的C++的STL vector ，

test.cc 非常简单:

#include <iostream>
#include <vector>

using namespace std;

int main(int argc, char *argv[])
{
  vector<int32_t> vec{1,2,3};

  return 0;
}

clang++ test.cc -std=c++17 -stdlib=libc++ -g

guo@dllab$ gdb ./a.out
GNU gdb (Ubuntu 7.7.1-0ubuntu5~14.04.3) 7.7.1
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License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
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and "show warranty" for details.
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Type "show configuration" for configuration details.
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For help, type "help".
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Reading symbols from ./a.out...done.
(gdb) l
1   #include <iostream>
2   #include <vector>
3
4   using namespace std;
5
6   int main(int argc, char *argv[])
7   {
8     vector<int32_t> vec{1,2,3};
9
10    return 0;
(gdb) b 9
Breakpoint 1 at 0x400ca5: file test.cc, line 9.
(gdb) r
Starting program: /home/guo/a.out
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".

Breakpoint 1, main (argc=1, argv=0x7fffffffd718) at test.cc:10
10    return 0;
(gdb) p vec
$1 = {
  <std::__1::__vector_base<int, std::__1::allocator<int> >> = {
    <std::__1::__vector_base_common<true>> = {<No data fields>},
    members of std::__1::__vector_base<int, std::__1::allocator<int> >:
    __begin_ = 0x603010,
    __end_ = 0x60301c,
    __end_cap_ = {
      <std::__1::__compressed_pair_elem<int*, 0, false>> = {
        __value_ = 0x60301c
      },
      <std::__1::__compressed_pair_elem<std::__1::allocator<int>, 1, true>> = {
        <std::__1::allocator<int>> = {<No data fields>}, <No data fields>}, <No data fields>}
  }, <No data fields>}
(gdb) pvector vec
There is no member or method named _M_impl.

我已经通过 cat stl-views-1.0.3.gdb > ~/.gdbinit 安装了 STL-views-1.0.3.gdb 。
所以应该使用 pvector 。

最佳答案

STL-views 是一种在 gdb 中检查 C++ 容器的过时方法。相反，对于 libstdc++，有 python pretty printers 是 gcc 的一部分。在许多 Linux 发行版中，它们都是开箱即用的。对于 libc++，没有官方的 pretty-print ，但是在 3rd Party implementation 中推荐了一个 libc++ documentation :

关于c++ - 没有名为_M_impl的成员或方法，如何使用pvector打印clang++和libc++编译的C++的STL vector ，，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/46473660/