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From: "steve_green at qq dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug c++/109169] New: Feature request: Allow omitted template
 prompts
Date: Fri, 17 Mar 2023 04:36:58 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D109169

            Bug ID: 109169
           Summary: Feature request: Allow omitted template prompts
           Product: gcc
           Version: unknown
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
          Assignee: unassigned at gcc dot gnu.org
          Reporter: steve_green at qq dot com
  Target Milestone: ---

I have a third party library that has this write up
```c++
template<class T>
template struct type_info_t{
        //...
        template<class U>
        static constexpr bool can_convert_to=3DXXX;
        //...
}
template<class T>
constexpr type_info_t<T>type_info{};
```
Since msvc supports such writes, the form of `type_info<T>.can_convert_to<U=
>`,
`compare.able<T>`, `invoke<F>.nothrow<Args... >` are written throughout the
project.
Although this is not the standard way of writing, I would expect gcc to sup=
port
such code.=