https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110092
Bug ID: 110092
Summary: Missing warning that internal header is used
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: piotrwn1 at gmail dot com
Target Milestone: ---
Developers new to C++ have sometime problems with including proper std library
header, instead, they sometimes include standard library internal headers -
since the definition is there and some IDE shows "you have this entity here".
I have tried "-Wall -Wextra -pedantic" and nothing warns me when, just for
example purposes, I included `<bits/shared_ptr.h>` whilst `<memory>` should
included.
I see in this "internal" header (bits/shared_ptr.h) the following information:
```
44 /** @file
45 * This is an internal header file, included by other library headers.
46 * Do not attempt to use it directly. @headername{memory}
47 */
```
So, probably it is doable to add warning like: "bist/shared_ptr.h is an
internal header file, included by other library headers. Do not attempt to use
it directly. Use <memory> instead"
