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  <title>Several issues about function parameter scope  · Issue #4710 · cplusplus/draft · GitHub</title>



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    <script type="application/ld+json">{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Several issues about function parameter scope ","articleBody":"\u003e A parameter-declaration-clause P introduces a function parameter scope that includes P.\r\n\u003e\u003e - If P is **associated with a declarator** and is preceded by a (possibly-parenthesized) noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e, **its scope extends to** the end of the nearest enclosing init-declarator, member-declarator, declarator of a parameter-declaration or a nodeclspec-function-declaration, or function-definition, but does not include the locus of the associated declarator.\r\n\u003e\u003e - If P is associated with a lambda-declarator, its scope extends to the end of the compound-statement in the lambda-expression.\r\n\u003e\u003e - If P is associated with a requirement-parameter-list, its scope extends to the end of the requirement-body of the requires-expression.\r\n\u003e\u003e - If P is associated with a deduction-guide, its scope extends to the end of the deduction-guide.\r\n\r\nPlease see this example:\r\n````cpp\r\nusing rt = auto(*)(int a)-\u003edecltype(a);\r\n````\r\nIt's obviously P is not associated with any **declarator** instead with **abstract-declarator**, let alone whether it is preceded by *noptr-declarator* of the form *declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e*. In this example, the name of the parameter is used in the place that has exceeded the scope of the function parameter scope introduced by P. However, the case is valid in any major implementation other than MSVC. The other bullets are irrelevant with this case. So, it seems the function parameter scope is underspecified for this case.  \r\n***\r\nIssue 2: \r\n````cpp\r\nauto(* ptr(double a))(int b)-\u003edecltype(a);\r\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       int b      )\r\n         init-declarator-\u003e declarator-\u003e noptr-declarator parameters-and-qualifiers  trailing-return-type\r\n                                         ^^^^^^^^^^^^^^^ \r\n                                         ( ptr-declarator )  \r\n                                                  ↓\r\n                                    (  ptr-operator ptr-declarator )\r\n                                                      ↓\r\n                                    (      *      noptr-declarator)   \r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     noptr-declarator parameters-and-qualifiers)\r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     declarator-id    parameters-and-qualifiers)\r\n                                                  ^^^^^^^^^\r\n                                                   ptr\r\n````\r\nFirst of all, this case is rejected by all major implementations. Assume the parameter-declaration-clause that comprises the parameter declaration `double a` is called P1, the other(comprises `int b`) is called P2. As shown in the Figure, P1 is associated with the declarator of the complete declaration and is preceded by *noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e* that is `ptr`. In terms of the first bullet in the above, the scope should be extended to the nearest enclosing  **init-declarator** `(* ptr(double a))(int b)-\u003edecltype(a)` since the other cases(member-declarator...) are all not suitable here. Hence, the use of the identifier `a` within `decltype` should be valid. But this conclusion is denied by implementations.","author":{"url":"https://github.com/xmh0511","@type":"Person","name":"xmh0511"},"datePublished":"2021-06-21T04:53:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/4710/draft/issues/4710"}</script> 
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  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;blog&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;blog_link_platform_navbar&quot;}" href="https://github.blog">
      Blog

    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
    <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path>
</svg>
</a></li>

                  </ul>
                </div>
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 pb-3">

                      <span class="d-block h4 color-fg-default my-1" id="platform-integrations-heading">Integrations</span>

                  <ul class="list-style-none f5" aria-labelledby="platform-integrations-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;github_marketplace&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;github_marketplace_link_platform_navbar&quot;}" href="https://github.com/marketplace">
      GitHub Marketplace

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;mcp_registry&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;mcp_registry_link_platform_navbar&quot;}" href="https://github.com/mcp">
      MCP Registry

    
</a></li>

                  </ul>
                </div>
            </div>
        </div>

          <div class="HeaderMenu-trailing-link rounded-bottom-2 mt-lg-4 px-lg-4 py-4 py-lg-3 f5 text-semibold">
            <a data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;view_all_features&quot;,&quot;context&quot;:&quot;platform&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;view_all_features_link_platform_navbar&quot;}" href="https://github.com/features">
              View all features
              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-right HeaderMenu-trailing-link-icon">
    <path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path>
</svg>
</a>          </div>
      </div>
</li>


                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
      <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
        Solutions
        <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
    <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path>
</svg>
      </button>

      <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 dropdown-menu-wide">
        <div class="d-lg-flex dropdown-menu-wide">
            <div class="HeaderMenu-column px-lg-4 pb-3 pb-lg-0 border-lg-right">
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 pb-3">

                      <span class="d-block h4 color-fg-default my-1" id="solutions-by-company-size-heading">By company size</span>

                  <ul class="list-style-none f5" aria-labelledby="solutions-by-company-size-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;enterprises&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;enterprises_link_solutions_navbar&quot;}" href="https://github.com/enterprise">
      Enterprises

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;small_and_medium_teams&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;small_and_medium_teams_link_solutions_navbar&quot;}" href="https://github.com/team">
      Small and medium teams

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;startups&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;startups_link_solutions_navbar&quot;}" href="https://github.com/enterprise/startups">
      Startups

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;nonprofits&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;nonprofits_link_solutions_navbar&quot;}" href="/solutions/industry/nonprofits">
      Nonprofits

    
</a></li>

                  </ul>
                </div>
            </div>
            <div class="HeaderMenu-column px-lg-4 pb-3 pb-lg-0 border-lg-right">
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 pb-3">

                      <span class="d-block h4 color-fg-default my-1" id="solutions-by-use-case-heading">By use case</span>

                  <ul class="list-style-none f5" aria-labelledby="solutions-by-use-case-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;app_modernization&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;app_modernization_link_solutions_navbar&quot;}" href="/solutions/use-case/app-modernization">
      App Modernization

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;devsecops&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;devsecops_link_solutions_navbar&quot;}" href="/solutions/use-case/devsecops">
      DevSecOps

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;devops&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;devops_link_solutions_navbar&quot;}" href="/solutions/use-case/devops">
      DevOps

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;ci_cd&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;ci_cd_link_solutions_navbar&quot;}" href="/solutions/use-case/ci-cd">
      CI/CD

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;view_all_use_cases&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;view_all_use_cases_link_solutions_navbar&quot;}" href="/solutions/use-case">
      View all use cases

    
</a></li>

                  </ul>
                </div>
            </div>
            <div class="HeaderMenu-column px-lg-4">
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 pb-3">

                      <span class="d-block h4 color-fg-default my-1" id="solutions-by-industry-heading">By industry</span>

                  <ul class="list-style-none f5" aria-labelledby="solutions-by-industry-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;healthcare&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;healthcare_link_solutions_navbar&quot;}" href="/solutions/industry/healthcare">
      Healthcare

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;financial_services&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;financial_services_link_solutions_navbar&quot;}" href="/solutions/industry/financial-services">
      Financial services

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;manufacturing&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;manufacturing_link_solutions_navbar&quot;}" href="/solutions/industry/manufacturing">
      Manufacturing

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;government&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;government_link_solutions_navbar&quot;}" href="/solutions/industry/government">
      Government

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;view_all_industries&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;view_all_industries_link_solutions_navbar&quot;}" href="/solutions/industry">
      View all industries

    
</a></li>

                  </ul>
                </div>
            </div>
        </div>

          <div class="HeaderMenu-trailing-link rounded-bottom-2 mt-lg-4 px-lg-4 py-4 py-lg-3 f5 text-semibold">
            <a data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;view_all_solutions&quot;,&quot;context&quot;:&quot;solutions&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;view_all_solutions_link_solutions_navbar&quot;}" href="/solutions">
              View all solutions
              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-right HeaderMenu-trailing-link-icon">
    <path d="M6.22 3.22a.75.75 0 0 1 1.06 0l4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L9.94 8 6.22 4.28a.75.75 0 0 1 0-1.06Z"></path>
</svg>
</a>          </div>
      </div>
</li>


                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
      <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
        Resources
        <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
    <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path>
</svg>
      </button>

      <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4 dropdown-menu-wide">
        <div class="d-lg-flex dropdown-menu-wide">
            <div class="HeaderMenu-column px-lg-4 pb-3 pb-lg-0 border-lg-right">
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 pb-3">

                      <span class="d-block h4 color-fg-default my-1" id="resources-topics-heading">Topics</span>

                  <ul class="list-style-none f5" aria-labelledby="resources-topics-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;ai&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;ai_link_resources_navbar&quot;}" href="/resources/articles/ai">
      AI

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;devops&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;devops_link_resources_navbar&quot;}" href="/resources/articles/devops">
      DevOps

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;security&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;security_link_resources_navbar&quot;}" href="/resources/articles/security">
      Security

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;software_development&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;software_development_link_resources_navbar&quot;}" href="/resources/articles/software-development">
      Software Development

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;view_all&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;view_all_link_resources_navbar&quot;}" href="/resources/articles">
      View all

    
</a></li>

                  </ul>
                </div>
            </div>
            <div class="HeaderMenu-column px-lg-4">
                <div class="border-bottom border-lg-bottom-0 pb-lg-0 border-bottom-0">

                      <span class="d-block h4 color-fg-default my-1" id="resources-explore-heading">Explore</span>

                  <ul class="list-style-none f5" aria-labelledby="resources-explore-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary Link--external" target="_blank" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;learning_pathways&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;learning_pathways_link_resources_navbar&quot;}" href="https://resources.github.com/learn/pathways">
      Learning Pathways

    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-link-external HeaderMenu-external-icon color-fg-subtle">
    <path d="M3.75 2h3.5a.75.75 0 0 1 0 1.5h-3.5a.25.25 0 0 0-.25.25v8.5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-3.5a.75.75 0 0 1 1.5 0v3.5A1.75 1.75 0 0 1 12.25 14h-8.5A1.75 1.75 0 0 1 2 12.25v-8.5C2 2.784 2.784 2 3.75 2Zm6.854-1h4.146a.25.25 0 0 1 .25.25v4.146a.25.25 0 0 1-.427.177L13.03 4.03 9.28 7.78a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042l3.75-3.75-1.543-1.543A.25.25 0 0 1 10.604 1Z"></path>
</svg>
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;events_amp_webinars&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;events_amp_webinars_link_resources_navbar&quot;}" href="https://github.com/resources/events">
      Events &amp; Webinars

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;ebooks_amp_whitepapers&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;ebooks_amp_whitepapers_link_resources_navbar&quot;}" href="https://github.com/resources/whitepapers">
      Ebooks &amp; Whitepapers

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;customer_stories&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;customer_stories_link_resources_navbar&quot;}" href="https://github.com/customer-stories">
      Customer Stories

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;partners&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;partners_link_resources_navbar&quot;}" href="https://github.com/partners">
      Partners

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;executive_insights&quot;,&quot;context&quot;:&quot;resources&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;executive_insights_link_resources_navbar&quot;}" href="https://github.com/solutions/executive-insights">
      Executive Insights

    
</a></li>

                  </ul>
                </div>
            </div>
        </div>

      </div>
</li>


                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
      <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
        Open Source
        <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
    <path d="M12.78 5.22a.749.749 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.06 0L3.22 6.28a.749.749 0 1 1 1.06-1.06L8 8.939l3.72-3.719a.749.749 0 0 1 1.06 0Z"></path>
</svg>
      </button>

      <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4">
        <div class="d-lg-flex dropdown-menu-wide">
            <div class="HeaderMenu-column px-lg-4">
                <div class="border-bottom mb-3 mb-lg-3 pb-3">

                  <ul class="list-style-none f5" >
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;github_sponsors&quot;,&quot;context&quot;:&quot;open_source&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;github_sponsors_link_open_source_navbar&quot;}" href="/sponsors">
      
      <div>
        <div class="color-fg-default h4">
          GitHub Sponsors

        </div>

        Fund open source developers
      </div>

    
</a></li>

                  </ul>
                </div>
                <div class="border-bottom mb-3 mb-lg-3 pb-3">

                  <ul class="list-style-none f5" >
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;the_readme_project&quot;,&quot;context&quot;:&quot;open_source&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;the_readme_project_link_open_source_navbar&quot;}" href="https://github.com/readme">
      
      <div>
        <div class="color-fg-default h4">
          The ReadME Project

        </div>

        GitHub community articles
      </div>

    
</a></li>

                  </ul>
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                <div class="border-bottom border-bottom-0">

                      <span class="d-block h4 color-fg-default my-1" id="open-source-repositories-heading">Repositories</span>

                  <ul class="list-style-none f5" aria-labelledby="open-source-repositories-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;topics&quot;,&quot;context&quot;:&quot;open_source&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;topics_link_open_source_navbar&quot;}" href="https://github.com/topics">
      Topics

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;trending&quot;,&quot;context&quot;:&quot;open_source&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;trending_link_open_source_navbar&quot;}" href="https://github.com/trending">
      Trending

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;collections&quot;,&quot;context&quot;:&quot;open_source&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;collections_link_open_source_navbar&quot;}" href="https://github.com/collections">
      Collections

    
</a></li>

                  </ul>
                </div>
            </div>
        </div>

      </div>
</li>


                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
      <button type="button" class="HeaderMenu-link border-0 width-full width-lg-auto px-0 px-lg-2 py-lg-2 no-wrap d-flex flex-items-center flex-justify-between js-details-target" aria-expanded="false">
        Enterprise
        <svg opacity="0.5" aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-chevron-down HeaderMenu-icon ml-1">
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</svg>
      </button>

      <div class="HeaderMenu-dropdown dropdown-menu rounded m-0 p-0 pt-2 pt-lg-4 position-relative position-lg-absolute left-0 left-lg-n3 pb-2 pb-lg-4">
        <div class="d-lg-flex dropdown-menu-wide">
            <div class="HeaderMenu-column px-lg-4">
                <div class="border-bottom mb-3 mb-lg-3 pb-3">

                  <ul class="list-style-none f5" >
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;enterprise_platform&quot;,&quot;context&quot;:&quot;enterprise&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;enterprise_platform_link_enterprise_navbar&quot;}" href="/enterprise">
      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-stack color-fg-subtle mr-3">
    <path d="M11.063 1.456a1.749 1.749 0 0 1 1.874 0l8.383 5.316a1.751 1.751 0 0 1 0 2.956l-8.383 5.316a1.749 1.749 0 0 1-1.874 0L2.68 9.728a1.751 1.751 0 0 1 0-2.956Zm1.071 1.267a.25.25 0 0 0-.268 0L3.483 8.039a.25.25 0 0 0 0 .422l8.383 5.316a.25.25 0 0 0 .268 0l8.383-5.316a.25.25 0 0 0 0-.422Z"></path><path d="M1.867 12.324a.75.75 0 0 1 1.035-.232l8.964 5.685a.25.25 0 0 0 .268 0l8.964-5.685a.75.75 0 0 1 .804 1.267l-8.965 5.685a1.749 1.749 0 0 1-1.874 0l-8.965-5.685a.75.75 0 0 1-.231-1.035Z"></path><path d="M1.867 16.324a.75.75 0 0 1 1.035-.232l8.964 5.685a.25.25 0 0 0 .268 0l8.964-5.685a.75.75 0 0 1 .804 1.267l-8.965 5.685a1.749 1.749 0 0 1-1.874 0l-8.965-5.685a.75.75 0 0 1-.231-1.035Z"></path>
</svg>
      <div>
        <div class="color-fg-default h4">
          Enterprise platform

        </div>

        AI-powered developer platform
      </div>

    
</a></li>

                  </ul>
                </div>
                <div class="border-bottom border-bottom-0">

                      <span class="d-block h4 color-fg-default my-1" id="enterprise-available-add-ons-heading">Available add-ons</span>

                  <ul class="list-style-none f5" aria-labelledby="enterprise-available-add-ons-heading">
                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description mb-lg-3" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;github_advanced_security&quot;,&quot;context&quot;:&quot;enterprise&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;github_advanced_security_link_enterprise_navbar&quot;}" href="https://github.com/security/advanced-security">
      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-shield-check color-fg-subtle mr-3">
    <path d="M16.53 9.78a.75.75 0 0 0-1.06-1.06L11 13.19l-1.97-1.97a.75.75 0 0 0-1.06 1.06l2.5 2.5a.75.75 0 0 0 1.06 0l5-5Z"></path><path d="m12.54.637 8.25 2.675A1.75 1.75 0 0 1 22 4.976V10c0 6.19-3.771 10.704-9.401 12.83a1.704 1.704 0 0 1-1.198 0C5.77 20.705 2 16.19 2 10V4.976c0-.758.489-1.43 1.21-1.664L11.46.637a1.748 1.748 0 0 1 1.08 0Zm-.617 1.426-8.25 2.676a.249.249 0 0 0-.173.237V10c0 5.46 3.28 9.483 8.43 11.426a.199.199 0 0 0 .14 0C17.22 19.483 20.5 15.461 20.5 10V4.976a.25.25 0 0 0-.173-.237l-8.25-2.676a.253.253 0 0 0-.154 0Z"></path>
</svg>
      <div>
        <div class="color-fg-default h4">
          GitHub Advanced Security

        </div>

        Enterprise-grade security features
      </div>

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description mb-lg-3" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;copilot_for_business&quot;,&quot;context&quot;:&quot;enterprise&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;copilot_for_business_link_enterprise_navbar&quot;}" href="/features/copilot/copilot-business">
      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-copilot color-fg-subtle mr-3">
    <path d="M23.922 16.992c-.861 1.495-5.859 5.023-11.922 5.023-6.063 0-11.061-3.528-11.922-5.023A.641.641 0 0 1 0 16.736v-2.869a.841.841 0 0 1 .053-.22c.372-.935 1.347-2.292 2.605-2.656.167-.429.414-1.055.644-1.517a10.195 10.195 0 0 1-.052-1.086c0-1.331.282-2.499 1.132-3.368.397-.406.89-.717 1.474-.952 1.399-1.136 3.392-2.093 6.122-2.093 2.731 0 4.767.957 6.166 2.093.584.235 1.077.546 1.474.952.85.869 1.132 2.037 1.132 3.368 0 .368-.014.733-.052 1.086.23.462.477 1.088.644 1.517 1.258.364 2.233 1.721 2.605 2.656a.832.832 0 0 1 .053.22v2.869a.641.641 0 0 1-.078.256ZM12.172 11h-.344a4.323 4.323 0 0 1-.355.508C10.703 12.455 9.555 13 7.965 13c-1.725 0-2.989-.359-3.782-1.259a2.005 2.005 0 0 1-.085-.104L4 11.741v6.585c1.435.779 4.514 2.179 8 2.179 3.486 0 6.565-1.4 8-2.179v-6.585l-.098-.104s-.033.045-.085.104c-.793.9-2.057 1.259-3.782 1.259-1.59 0-2.738-.545-3.508-1.492a4.323 4.323 0 0 1-.355-.508h-.016.016Zm.641-2.935c.136 1.057.403 1.913.878 2.497.442.544 1.134.938 2.344.938 1.573 0 2.292-.337 2.657-.751.384-.435.558-1.15.558-2.361 0-1.14-.243-1.847-.705-2.319-.477-.488-1.319-.862-2.824-1.025-1.487-.161-2.192.138-2.533.529-.269.307-.437.808-.438 1.578v.021c0 .265.021.562.063.893Zm-1.626 0c.042-.331.063-.628.063-.894v-.02c-.001-.77-.169-1.271-.438-1.578-.341-.391-1.046-.69-2.533-.529-1.505.163-2.347.537-2.824 1.025-.462.472-.705 1.179-.705 2.319 0 1.211.175 1.926.558 2.361.365.414 1.084.751 2.657.751 1.21 0 1.902-.394 2.344-.938.475-.584.742-1.44.878-2.497Z"></path><path d="M14.5 14.25a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Zm-5 0a1 1 0 0 1 1 1v2a1 1 0 0 1-2 0v-2a1 1 0 0 1 1-1Z"></path>
</svg>
      <div>
        <div class="color-fg-default h4">
          Copilot for business

        </div>

        Enterprise-grade AI features
      </div>

    
</a></li>

                      <li>
  <a class="HeaderMenu-dropdown-link d-block no-underline position-relative py-2 Link--secondary d-flex flex-items-center Link--has-description" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;premium_support&quot;,&quot;context&quot;:&quot;enterprise&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;premium_support_link_enterprise_navbar&quot;}" href="/premium-support">
      <svg aria-hidden="true" height="24" viewBox="0 0 24 24" version="1.1" width="24" data-view-component="true" class="octicon octicon-comment-discussion color-fg-subtle mr-3">
    <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 14.25 14H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 15.543V14H1.75A1.75 1.75 0 0 1 0 12.25v-9.5C0 1.784.784 1 1.75 1ZM1.5 2.75v9.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-9.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Z"></path><path d="M22.5 8.75a.25.25 0 0 0-.25-.25h-3.5a.75.75 0 0 1 0-1.5h3.5c.966 0 1.75.784 1.75 1.75v9.5A1.75 1.75 0 0 1 22.25 20H21v1.543a1.457 1.457 0 0 1-2.487 1.03L15.939 20H10.75A1.75 1.75 0 0 1 9 18.25v-1.465a.75.75 0 0 1 1.5 0v1.465c0 .138.112.25.25.25h5.5a.75.75 0 0 1 .53.22l2.72 2.72v-2.19a.75.75 0 0 1 .75-.75h2a.25.25 0 0 0 .25-.25v-9.5Z"></path>
</svg>
      <div>
        <div class="color-fg-default h4">
          Premium Support

        </div>

        Enterprise-grade 24/7 support
      </div>

    
</a></li>

                  </ul>
                </div>
            </div>
        </div>

      </div>
</li>


                <li class="HeaderMenu-item position-relative flex-wrap flex-justify-between flex-items-center d-block d-lg-flex flex-lg-nowrap flex-lg-items-center js-details-container js-header-menu-item">
    <a class="HeaderMenu-link no-underline px-0 px-lg-2 py-3 py-lg-2 d-block d-lg-inline-block" data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;platform&quot;,&quot;context&quot;:&quot;global&quot;,&quot;tag&quot;:&quot;link&quot;,&quot;label&quot;:&quot;platform_link_global_navbar&quot;}" href="https://github.com/pricing">Pricing</a>
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        <div class="d-flex flex-column flex-lg-row width-full flex-justify-end flex-lg-items-center text-center mt-3 mt-lg-0 text-lg-left ml-lg-3">
                


<qbsearch-input class="search-input" data-scope="repo:cplusplus/draft" data-custom-scopes-path="/search/custom_scopes" data-delete-custom-scopes-csrf="nw463CurKUZN5PUjD2rqFTHJ8pd8Qo6RrNTLu5ghhZfakPoCjy8NKnbp4plX9A-p4Mbp-cdTFL9E5yhfV5P2IQ" data-max-custom-scopes="10" data-header-redesign-enabled="false" data-initial-value="" data-blackbird-suggestions-path="/search/suggestions" data-jump-to-suggestions-path="/_graphql/GetSuggestedNavigationDestinations" data-current-repository="cplusplus/draft" data-current-org="cplusplus" data-current-owner="" data-logged-in="false" data-copilot-chat-enabled="false" data-nl-search-enabled="false" data-retain-scroll-position="true">
  <div
    class="search-input-container search-with-dialog position-relative d-flex flex-row flex-items-center mr-4 rounded"
    data-action="click:qbsearch-input#searchInputContainerClicked"
  >
      <button
        type="button"
        class="header-search-button placeholder  input-button form-control d-flex flex-1 flex-self-stretch flex-items-center no-wrap width-full py-0 pl-2 pr-0 text-left border-0 box-shadow-none"
        data-target="qbsearch-input.inputButton"
        aria-label="Search or jump to…"
        aria-haspopup="dialog"
        placeholder="Search or jump to..."
        data-hotkey=s,/
        autocapitalize="off"
        data-analytics-event="{&quot;location&quot;:&quot;navbar&quot;,&quot;action&quot;:&quot;searchbar&quot;,&quot;context&quot;:&quot;global&quot;,&quot;tag&quot;:&quot;input&quot;,&quot;label&quot;:&quot;searchbar_input_global_navbar&quot;}"
        data-action="click:qbsearch-input#handleExpand"
      >
        <div class="mr-2 color-fg-muted">
          <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search">
    <path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path>
</svg>
        </div>
        <span class="flex-1" data-target="qbsearch-input.inputButtonText">Search or jump to...</span>
          <div class="d-flex" data-target="qbsearch-input.hotkeyIndicator">
            <svg xmlns="http://www.w3.org/2000/svg" width="22" height="20" aria-hidden="true" class="mr-1"><path fill="none" stroke="#979A9C" opacity=".4" d="M3.5.5h12c1.7 0 3 1.3 3 3v13c0 1.7-1.3 3-3 3h-12c-1.7 0-3-1.3-3-3v-13c0-1.7 1.3-3 3-3z"></path><path fill="#979A9C" d="M11.8 6L8 15.1h-.9L10.8 6h1z"></path></svg>
          </div>
      </button>

    <input type="hidden" name="type" class="js-site-search-type-field">

    
<div class="Overlay--hidden " data-modal-dialog-overlay>
  <modal-dialog data-action="close:qbsearch-input#handleClose cancel:qbsearch-input#handleClose" data-target="qbsearch-input.searchSuggestionsDialog" role="dialog" id="search-suggestions-dialog" aria-modal="true" aria-labelledby="search-suggestions-dialog-header" data-view-component="true" class="Overlay Overlay--width-large Overlay--height-auto">
      <h1 id="search-suggestions-dialog-header" class="sr-only">Search code, repositories, users, issues, pull requests...</h1>
    <div class="Overlay-body Overlay-body--paddingNone">
      
          <div data-view-component="true">        <div class="search-suggestions position-fixed width-full color-shadow-large border color-fg-default color-bg-default overflow-hidden d-flex flex-column query-builder-container"
          style="border-radius: 12px;"
          data-target="qbsearch-input.queryBuilderContainer"
          hidden
        >
          <!-- '"` --><!-- </textarea></xmp> --></option></form><form id="query-builder-test-form" action="" accept-charset="UTF-8" method="get">
  <query-builder data-target="qbsearch-input.queryBuilder" id="query-builder-query-builder-test" data-filter-key=":" data-view-component="true" class="QueryBuilder search-query-builder">
    <div class="FormControl FormControl--fullWidth">
      <label id="query-builder-test-label" for="query-builder-test" class="FormControl-label sr-only">
        Search
      </label>
      <div
        class="QueryBuilder-StyledInput width-fit "
        data-target="query-builder.styledInput"
      >
          <span id="query-builder-test-leadingvisual-wrap" class="FormControl-input-leadingVisualWrap QueryBuilder-leadingVisualWrap">
            <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search FormControl-input-leadingVisual">
    <path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path>
</svg>
          </span>
        <div data-target="query-builder.styledInputContainer" class="QueryBuilder-StyledInputContainer">
          <div
            aria-hidden="true"
            class="QueryBuilder-StyledInputContent"
            data-target="query-builder.styledInputContent"
          ></div>
          <div class="QueryBuilder-InputWrapper">
            <div aria-hidden="true" class="QueryBuilder-Sizer" data-target="query-builder.sizer"></div>
            <input id="query-builder-test" name="query-builder-test" value="" autocomplete="off" type="text" role="combobox" spellcheck="false" aria-expanded="false" aria-describedby="validation-30b479f0-d1dd-4722-b5f0-df849cc3d7b1" data-target="query-builder.input" data-action="
          input:query-builder#inputChange
          blur:query-builder#inputBlur
          keydown:query-builder#inputKeydown
          focus:query-builder#inputFocus
        " data-view-component="true" class="FormControl-input QueryBuilder-Input FormControl-medium" />
          </div>
        </div>
          <span class="sr-only" id="query-builder-test-clear">Clear</span>
          <button role="button" id="query-builder-test-clear-button" aria-labelledby="query-builder-test-clear query-builder-test-label" data-target="query-builder.clearButton" data-action="
                click:query-builder#clear
                focus:query-builder#clearButtonFocus
                blur:query-builder#clearButtonBlur
              " variant="small" hidden="hidden" type="button" data-view-component="true" class="Button Button--iconOnly Button--invisible Button--medium mr-1 px-2 py-0 d-flex flex-items-center rounded-1 color-fg-muted">  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x-circle-fill Button-visual">
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</svg>
</button>

      </div>
      <template id="search-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-search">
    <path d="M10.68 11.74a6 6 0 0 1-7.922-8.982 6 6 0 0 1 8.982 7.922l3.04 3.04a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215ZM11.5 7a4.499 4.499 0 1 0-8.997 0A4.499 4.499 0 0 0 11.5 7Z"></path>
</svg>
</template>

<template id="code-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code">
    <path d="m11.28 3.22 4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L13.94 8l-3.72-3.72a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215Zm-6.56 0a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042L2.06 8l3.72 3.72a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L.47 8.53a.75.75 0 0 1 0-1.06Z"></path>
</svg>
</template>

<template id="file-code-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-file-code">
    <path d="M4 1.75C4 .784 4.784 0 5.75 0h5.586c.464 0 .909.184 1.237.513l2.914 2.914c.329.328.513.773.513 1.237v8.586A1.75 1.75 0 0 1 14.25 15h-9a.75.75 0 0 1 0-1.5h9a.25.25 0 0 0 .25-.25V6h-2.75A1.75 1.75 0 0 1 10 4.25V1.5H5.75a.25.25 0 0 0-.25.25v2.5a.75.75 0 0 1-1.5 0Zm1.72 4.97a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734l1.47-1.47-1.47-1.47a.75.75 0 0 1 0-1.06ZM3.28 7.78 1.81 9.25l1.47 1.47a.751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018l-2-2a.75.75 0 0 1 0-1.06l2-2a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042Zm8.22-6.218V4.25c0 .138.112.25.25.25h2.688l-.011-.013-2.914-2.914-.013-.011Z"></path>
</svg>
</template>

<template id="history-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-history">
    <path d="m.427 1.927 1.215 1.215a8.002 8.002 0 1 1-1.6 5.685.75.75 0 1 1 1.493-.154 6.5 6.5 0 1 0 1.18-4.458l1.358 1.358A.25.25 0 0 1 3.896 6H.25A.25.25 0 0 1 0 5.75V2.104a.25.25 0 0 1 .427-.177ZM7.75 4a.75.75 0 0 1 .75.75v2.992l2.028.812a.75.75 0 0 1-.557 1.392l-2.5-1A.751.751 0 0 1 7 8.25v-3.5A.75.75 0 0 1 7.75 4Z"></path>
</svg>
</template>

<template id="repo-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo">
    <path d="M2 2.5A2.5 2.5 0 0 1 4.5 0h8.75a.75.75 0 0 1 .75.75v12.5a.75.75 0 0 1-.75.75h-2.5a.75.75 0 0 1 0-1.5h1.75v-2h-8a1 1 0 0 0-.714 1.7.75.75 0 1 1-1.072 1.05A2.495 2.495 0 0 1 2 11.5Zm10.5-1h-8a1 1 0 0 0-1 1v6.708A2.486 2.486 0 0 1 4.5 9h8ZM5 12.25a.25.25 0 0 1 .25-.25h3.5a.25.25 0 0 1 .25.25v3.25a.25.25 0 0 1-.4.2l-1.45-1.087a.249.249 0 0 0-.3 0L5.4 15.7a.25.25 0 0 1-.4-.2Z"></path>
</svg>
</template>

<template id="bookmark-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bookmark">
    <path d="M3 2.75C3 1.784 3.784 1 4.75 1h6.5c.966 0 1.75.784 1.75 1.75v11.5a.75.75 0 0 1-1.227.579L8 11.722l-3.773 3.107A.751.751 0 0 1 3 14.25Zm1.75-.25a.25.25 0 0 0-.25.25v9.91l3.023-2.489a.75.75 0 0 1 .954 0l3.023 2.49V2.75a.25.25 0 0 0-.25-.25Z"></path>
</svg>
</template>

<template id="plus-circle-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-plus-circle">
    <path d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM1.5 8a6.5 6.5 0 1 0 13 0 6.5 6.5 0 0 0-13 0Zm7.25-3.25v2.5h2.5a.75.75 0 0 1 0 1.5h-2.5v2.5a.75.75 0 0 1-1.5 0v-2.5h-2.5a.75.75 0 0 1 0-1.5h2.5v-2.5a.75.75 0 0 1 1.5 0Z"></path>
</svg>
</template>

<template id="circle-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-dot-fill">
    <path d="M8 4a4 4 0 1 1 0 8 4 4 0 0 1 0-8Z"></path>
</svg>
</template>

<template id="trash-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-trash">
    <path d="M11 1.75V3h2.25a.75.75 0 0 1 0 1.5H2.75a.75.75 0 0 1 0-1.5H5V1.75C5 .784 5.784 0 6.75 0h2.5C10.216 0 11 .784 11 1.75ZM4.496 6.675l.66 6.6a.25.25 0 0 0 .249.225h5.19a.25.25 0 0 0 .249-.225l.66-6.6a.75.75 0 0 1 1.492.149l-.66 6.6A1.748 1.748 0 0 1 10.595 15h-5.19a1.75 1.75 0 0 1-1.741-1.575l-.66-6.6a.75.75 0 1 1 1.492-.15ZM6.5 1.75V3h3V1.75a.25.25 0 0 0-.25-.25h-2.5a.25.25 0 0 0-.25.25Z"></path>
</svg>
</template>

<template id="team-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-people">
    <path d="M2 5.5a3.5 3.5 0 1 1 5.898 2.549 5.508 5.508 0 0 1 3.034 4.084.75.75 0 1 1-1.482.235 4 4 0 0 0-7.9 0 .75.75 0 0 1-1.482-.236A5.507 5.507 0 0 1 3.102 8.05 3.493 3.493 0 0 1 2 5.5ZM11 4a3.001 3.001 0 0 1 2.22 5.018 5.01 5.01 0 0 1 2.56 3.012.749.749 0 0 1-.885.954.752.752 0 0 1-.549-.514 3.507 3.507 0 0 0-2.522-2.372.75.75 0 0 1-.574-.73v-.352a.75.75 0 0 1 .416-.672A1.5 1.5 0 0 0 11 5.5.75.75 0 0 1 11 4Zm-5.5-.5a2 2 0 1 0-.001 3.999A2 2 0 0 0 5.5 3.5Z"></path>
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</template>

<template id="project-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-project">
    <path d="M1.75 0h12.5C15.216 0 16 .784 16 1.75v12.5A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0ZM1.5 1.75v12.5c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25ZM11.75 3a.75.75 0 0 1 .75.75v7.5a.75.75 0 0 1-1.5 0v-7.5a.75.75 0 0 1 .75-.75Zm-8.25.75a.75.75 0 0 1 1.5 0v5.5a.75.75 0 0 1-1.5 0ZM8 3a.75.75 0 0 1 .75.75v3.5a.75.75 0 0 1-1.5 0v-3.5A.75.75 0 0 1 8 3Z"></path>
</svg>
</template>

<template id="pencil-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-pencil">
    <path d="M11.013 1.427a1.75 1.75 0 0 1 2.474 0l1.086 1.086a1.75 1.75 0 0 1 0 2.474l-8.61 8.61c-.21.21-.47.364-.756.445l-3.251.93a.75.75 0 0 1-.927-.928l.929-3.25c.081-.286.235-.547.445-.758l8.61-8.61Zm.176 4.823L9.75 4.81l-6.286 6.287a.253.253 0 0 0-.064.108l-.558 1.953 1.953-.558a.253.253 0 0 0 .108-.064Zm1.238-3.763a.25.25 0 0 0-.354 0L10.811 3.75l1.439 1.44 1.263-1.263a.25.25 0 0 0 0-.354Z"></path>
</svg>
</template>

<template id="copilot-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copilot">
    <path d="M7.998 15.035c-4.562 0-7.873-2.914-7.998-3.749V9.338c.085-.628.677-1.686 1.588-2.065.013-.07.024-.143.036-.218.029-.183.06-.384.126-.612-.201-.508-.254-1.084-.254-1.656 0-.87.128-1.769.693-2.484.579-.733 1.494-1.124 2.724-1.261 1.206-.134 2.262.034 2.944.765.05.053.096.108.139.165.044-.057.094-.112.143-.165.682-.731 1.738-.899 2.944-.765 1.23.137 2.145.528 2.724 1.261.566.715.693 1.614.693 2.484 0 .572-.053 1.148-.254 1.656.066.228.098.429.126.612.012.076.024.148.037.218.924.385 1.522 1.471 1.591 2.095v1.872c0 .766-3.351 3.795-8.002 3.795Zm0-1.485c2.28 0 4.584-1.11 5.002-1.433V7.862l-.023-.116c-.49.21-1.075.291-1.727.291-1.146 0-2.059-.327-2.71-.991A3.222 3.222 0 0 1 8 6.303a3.24 3.24 0 0 1-.544.743c-.65.664-1.563.991-2.71.991-.652 0-1.236-.081-1.727-.291l-.023.116v4.255c.419.323 2.722 1.433 5.002 1.433ZM6.762 2.83c-.193-.206-.637-.413-1.682-.297-1.019.113-1.479.404-1.713.7-.247.312-.369.789-.369 1.554 0 .793.129 1.171.308 1.371.162.181.519.379 1.442.379.853 0 1.339-.235 1.638-.54.315-.322.527-.827.617-1.553.117-.935-.037-1.395-.241-1.614Zm4.155-.297c-1.044-.116-1.488.091-1.681.297-.204.219-.359.679-.242 1.614.091.726.303 1.231.618 1.553.299.305.784.54 1.638.54.922 0 1.28-.198 1.442-.379.179-.2.308-.578.308-1.371 0-.765-.123-1.242-.37-1.554-.233-.296-.693-.587-1.713-.7Z"></path><path d="M6.25 9.037a.75.75 0 0 1 .75.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 .75-.75Zm4.25.75v1.501a.75.75 0 0 1-1.5 0V9.787a.75.75 0 0 1 1.5 0Z"></path>
</svg>
</template>

<template id="copilot-error-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-copilot-error">
    <path d="M16 11.24c0 .112-.072.274-.21.467L13 9.688V7.862l-.023-.116c-.49.21-1.075.291-1.727.291-.198 0-.388-.009-.571-.029L6.833 5.226a4.01 4.01 0 0 0 .17-.782c.117-.935-.037-1.395-.241-1.614-.193-.206-.637-.413-1.682-.297-.683.076-1.115.231-1.395.415l-1.257-.91c.579-.564 1.413-.877 2.485-.996 1.206-.134 2.262.034 2.944.765.05.053.096.108.139.165.044-.057.094-.112.143-.165.682-.731 1.738-.899 2.944-.765 1.23.137 2.145.528 2.724 1.261.566.715.693 1.614.693 2.484 0 .572-.053 1.148-.254 1.656.066.228.098.429.126.612.012.076.024.148.037.218.924.385 1.522 1.471 1.591 2.095Zm-5.083-8.707c-1.044-.116-1.488.091-1.681.297-.204.219-.359.679-.242 1.614.091.726.303 1.231.618 1.553.299.305.784.54 1.638.54.922 0 1.28-.198 1.442-.379.179-.2.308-.578.308-1.371 0-.765-.123-1.242-.37-1.554-.233-.296-.693-.587-1.713-.7Zm2.511 11.074c-1.393.776-3.272 1.428-5.43 1.428-4.562 0-7.873-2.914-7.998-3.749V9.338c.085-.628.677-1.686 1.588-2.065.013-.07.024-.143.036-.218.029-.183.06-.384.126-.612-.18-.455-.241-.963-.252-1.475L.31 4.107A.747.747 0 0 1 0 3.509V3.49a.748.748 0 0 1 .625-.73c.156-.026.306.047.435.139l14.667 10.578a.592.592 0 0 1 .227.264.752.752 0 0 1 .046.249v.022a.75.75 0 0 1-1.19.596Zm-1.367-.991L5.635 7.964a5.128 5.128 0 0 1-.889.073c-.652 0-1.236-.081-1.727-.291l-.023.116v4.255c.419.323 2.722 1.433 5.002 1.433 1.539 0 3.089-.505 4.063-.934Z"></path>
</svg>
</template>

<template id="workflow-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-workflow">
    <path d="M0 1.75C0 .784.784 0 1.75 0h3.5C6.216 0 7 .784 7 1.75v3.5A1.75 1.75 0 0 1 5.25 7H4v4a1 1 0 0 0 1 1h4v-1.25C9 9.784 9.784 9 10.75 9h3.5c.966 0 1.75.784 1.75 1.75v3.5A1.75 1.75 0 0 1 14.25 16h-3.5A1.75 1.75 0 0 1 9 14.25v-.75H5A2.5 2.5 0 0 1 2.5 11V7h-.75A1.75 1.75 0 0 1 0 5.25Zm1.75-.25a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Zm9 9a.25.25 0 0 0-.25.25v3.5c0 .138.112.25.25.25h3.5a.25.25 0 0 0 .25-.25v-3.5a.25.25 0 0 0-.25-.25Z"></path>
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</template>

<template id="book-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-book">
    <path d="M0 1.75A.75.75 0 0 1 .75 1h4.253c1.227 0 2.317.59 3 1.501A3.743 3.743 0 0 1 11.006 1h4.245a.75.75 0 0 1 .75.75v10.5a.75.75 0 0 1-.75.75h-4.507a2.25 2.25 0 0 0-1.591.659l-.622.621a.75.75 0 0 1-1.06 0l-.622-.621A2.25 2.25 0 0 0 5.258 13H.75a.75.75 0 0 1-.75-.75Zm7.251 10.324.004-5.073-.002-2.253A2.25 2.25 0 0 0 5.003 2.5H1.5v9h3.757a3.75 3.75 0 0 1 1.994.574ZM8.755 4.75l-.004 7.322a3.752 3.752 0 0 1 1.992-.572H14.5v-9h-3.495a2.25 2.25 0 0 0-2.25 2.25Z"></path>
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</template>

<template id="code-review-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code-review">
    <path d="M1.75 1h12.5c.966 0 1.75.784 1.75 1.75v8.5A1.75 1.75 0 0 1 14.25 13H8.061l-2.574 2.573A1.458 1.458 0 0 1 3 14.543V13H1.75A1.75 1.75 0 0 1 0 11.25v-8.5C0 1.784.784 1 1.75 1ZM1.5 2.75v8.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h6.5a.25.25 0 0 0 .25-.25v-8.5a.25.25 0 0 0-.25-.25H1.75a.25.25 0 0 0-.25.25Zm5.28 1.72a.75.75 0 0 1 0 1.06L5.31 7l1.47 1.47a.751.751 0 0 1-.018 1.042.751.751 0 0 1-1.042.018l-2-2a.75.75 0 0 1 0-1.06l2-2a.75.75 0 0 1 1.06 0Zm2.44 0a.75.75 0 0 1 1.06 0l2 2a.75.75 0 0 1 0 1.06l-2 2a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L10.69 7 9.22 5.53a.75.75 0 0 1 0-1.06Z"></path>
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</template>

<template id="codespaces-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-codespaces">
    <path d="M0 11.25c0-.966.784-1.75 1.75-1.75h12.5c.966 0 1.75.784 1.75 1.75v3A1.75 1.75 0 0 1 14.25 16H1.75A1.75 1.75 0 0 1 0 14.25Zm2-9.5C2 .784 2.784 0 3.75 0h8.5C13.216 0 14 .784 14 1.75v5a1.75 1.75 0 0 1-1.75 1.75h-8.5A1.75 1.75 0 0 1 2 6.75Zm1.75-.25a.25.25 0 0 0-.25.25v5c0 .138.112.25.25.25h8.5a.25.25 0 0 0 .25-.25v-5a.25.25 0 0 0-.25-.25Zm-2 9.5a.25.25 0 0 0-.25.25v3c0 .138.112.25.25.25h12.5a.25.25 0 0 0 .25-.25v-3a.25.25 0 0 0-.25-.25Z"></path><path d="M7 12.75a.75.75 0 0 1 .75-.75h4.5a.75.75 0 0 1 0 1.5h-4.5a.75.75 0 0 1-.75-.75Zm-4 0a.75.75 0 0 1 .75-.75h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1-.75-.75Z"></path>
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</template>

<template id="comment-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment">
    <path d="M1 2.75C1 1.784 1.784 1 2.75 1h10.5c.966 0 1.75.784 1.75 1.75v7.5A1.75 1.75 0 0 1 13.25 12H9.06l-2.573 2.573A1.458 1.458 0 0 1 4 13.543V12H2.75A1.75 1.75 0 0 1 1 10.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h2a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h4.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path>
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</template>

<template id="comment-discussion-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-comment-discussion">
    <path d="M1.75 1h8.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 10.25 10H7.061l-2.574 2.573A1.458 1.458 0 0 1 2 11.543V10h-.25A1.75 1.75 0 0 1 0 8.25v-5.5C0 1.784.784 1 1.75 1ZM1.5 2.75v5.5c0 .138.112.25.25.25h1a.75.75 0 0 1 .75.75v2.19l2.72-2.72a.749.749 0 0 1 .53-.22h3.5a.25.25 0 0 0 .25-.25v-5.5a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25Zm13 2a.25.25 0 0 0-.25-.25h-.5a.75.75 0 0 1 0-1.5h.5c.966 0 1.75.784 1.75 1.75v5.5A1.75 1.75 0 0 1 14.25 12H14v1.543a1.458 1.458 0 0 1-2.487 1.03L9.22 12.28a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215l2.22 2.22v-2.19a.75.75 0 0 1 .75-.75h1a.25.25 0 0 0 .25-.25Z"></path>
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</template>

<template id="organization-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-organization">
    <path d="M1.75 16A1.75 1.75 0 0 1 0 14.25V1.75C0 .784.784 0 1.75 0h8.5C11.216 0 12 .784 12 1.75v12.5c0 .085-.006.168-.018.25h2.268a.25.25 0 0 0 .25-.25V8.285a.25.25 0 0 0-.111-.208l-1.055-.703a.749.749 0 1 1 .832-1.248l1.055.703c.487.325.779.871.779 1.456v5.965A1.75 1.75 0 0 1 14.25 16h-3.5a.766.766 0 0 1-.197-.026c-.099.017-.2.026-.303.026h-3a.75.75 0 0 1-.75-.75V14h-1v1.25a.75.75 0 0 1-.75.75Zm-.25-1.75c0 .138.112.25.25.25H4v-1.25a.75.75 0 0 1 .75-.75h2.5a.75.75 0 0 1 .75.75v1.25h2.25a.25.25 0 0 0 .25-.25V1.75a.25.25 0 0 0-.25-.25h-8.5a.25.25 0 0 0-.25.25ZM3.75 6h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 3.75A.75.75 0 0 1 3.75 3h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 3.75Zm4 3A.75.75 0 0 1 7.75 6h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 7 6.75ZM7.75 3h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5ZM3 9.75A.75.75 0 0 1 3.75 9h.5a.75.75 0 0 1 0 1.5h-.5A.75.75 0 0 1 3 9.75ZM7.75 9h.5a.75.75 0 0 1 0 1.5h-.5a.75.75 0 0 1 0-1.5Z"></path>
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</template>

<template id="rocket-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-rocket">
    <path d="M14.064 0h.186C15.216 0 16 .784 16 1.75v.186a8.752 8.752 0 0 1-2.564 6.186l-.458.459c-.314.314-.641.616-.979.904v3.207c0 .608-.315 1.172-.833 1.49l-2.774 1.707a.749.749 0 0 1-1.11-.418l-.954-3.102a1.214 1.214 0 0 1-.145-.125L3.754 9.816a1.218 1.218 0 0 1-.124-.145L.528 8.717a.749.749 0 0 1-.418-1.11l1.71-2.774A1.748 1.748 0 0 1 3.31 4h3.204c.288-.338.59-.665.904-.979l.459-.458A8.749 8.749 0 0 1 14.064 0ZM8.938 3.623h-.002l-.458.458c-.76.76-1.437 1.598-2.02 2.5l-1.5 2.317 2.143 2.143 2.317-1.5c.902-.583 1.74-1.26 2.499-2.02l.459-.458a7.25 7.25 0 0 0 2.123-5.127V1.75a.25.25 0 0 0-.25-.25h-.186a7.249 7.249 0 0 0-5.125 2.123ZM3.56 14.56c-.732.732-2.334 1.045-3.005 1.148a.234.234 0 0 1-.201-.064.234.234 0 0 1-.064-.201c.103-.671.416-2.273 1.15-3.003a1.502 1.502 0 1 1 2.12 2.12Zm6.94-3.935c-.088.06-.177.118-.266.175l-2.35 1.521.548 1.783 1.949-1.2a.25.25 0 0 0 .119-.213ZM3.678 8.116 5.2 5.766c.058-.09.117-.178.176-.266H3.309a.25.25 0 0 0-.213.119l-1.2 1.95ZM12 5a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path>
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</template>

<template id="shield-check-icon">
  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-shield-check">
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<template id="package-icon">
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<template id="credit-card-icon">
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<template id="play-icon">
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<template id="code-square-icon">
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<template id="device-desktop-icon">
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        <div class="position-relative">
                <ul
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                  class="ActionListWrap QueryBuilder-ListWrap"
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                name="custom_scope_name"
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                required
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            <label for="custom_scope_query">Query</label>
            <input
              type="text"
              name="custom_scope_query"
              id="custom_scope_query"
              data-target="custom-scopes.customScopesQueryField"
              class="form-control"
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              placeholder="(repo:mona/a OR repo:mona/b) AND lang:python"
              required
              maxlength="500">
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          <p class="text-small color-fg-muted">
            To see all available qualifiers, see our <a class="Link--inTextBlock" href="https://docs.github.com/search-github/github-code-search/understanding-github-code-search-syntax">documentation</a>.
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                data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;site header menu&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;SIGN_UP&quot;,&quot;originating_url&quot;:&quot;https://github.com/cplusplus/draft/issues/4710&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="58c3f79d8322d38610139aa373a87fdfaa233a8d200333a330ad32f9d0ef394d"
                data-analytics-event="{&quot;category&quot;:&quot;Marketing nav&quot;,&quot;action&quot;:&quot;click to go to homepage&quot;,&quot;label&quot;:&quot;ref_page:Marketing;ref_cta:Sign in;ref_loc:Header&quot;}"
              >
                Sign in
              </a>
            </div>

              <a href="/signup?ref_cta=Sign+up&amp;ref_loc=header+logged+out&amp;ref_page=%2F%3Cuser-name%3E%2F%3Crepo-name%3E%2Fvoltron%2Fissues_fragments%2Fissue_layout&amp;source=header-repo&amp;source_repo=cplusplus%2Fdraft"
                class="HeaderMenu-link HeaderMenu-link--sign-up HeaderMenu-button flex-shrink-0 d-flex d-lg-inline-flex no-underline border color-border-default rounded px-2 py-1"
                data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;site header menu&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;SIGN_UP&quot;,&quot;originating_url&quot;:&quot;https://github.com/cplusplus/draft/issues/4710&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="58c3f79d8322d38610139aa373a87fdfaa233a8d200333a330ad32f9d0ef394d"
                data-analytics-event="{&quot;category&quot;:&quot;Sign up&quot;,&quot;action&quot;:&quot;click to sign up for account&quot;,&quot;label&quot;:&quot;ref_page:/&lt;user-name&gt;/&lt;repo-name&gt;/voltron/issues_fragments/issue_layout;ref_cta:Sign up;ref_loc:header logged out&quot;}"
              >
                Sign up
              </a>

                <div class="AppHeader-appearanceSettings">
    <react-partial-anchor>
      <button data-target="react-partial-anchor.anchor" id="icon-button-7332adf8-c7e1-459f-851a-62f297f9dd0b" aria-labelledby="tooltip-4fd1bb25-6be8-4668-bd13-5f52931cf046" type="button" disabled="disabled" data-view-component="true" class="Button Button--iconOnly Button--invisible Button--medium AppHeader-button HeaderMenu-link border cursor-wait">  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-sliders Button-visual">
    <path d="M15 2.75a.75.75 0 0 1-.75.75h-4a.75.75 0 0 1 0-1.5h4a.75.75 0 0 1 .75.75Zm-8.5.75v1.25a.75.75 0 0 0 1.5 0v-4a.75.75 0 0 0-1.5 0V2H1.75a.75.75 0 0 0 0 1.5H6.5Zm1.25 5.25a.75.75 0 0 0 0-1.5h-6a.75.75 0 0 0 0 1.5h6ZM15 8a.75.75 0 0 1-.75.75H11.5V10a.75.75 0 1 1-1.5 0V6a.75.75 0 0 1 1.5 0v1.25h2.75A.75.75 0 0 1 15 8Zm-9 5.25v-2a.75.75 0 0 0-1.5 0v1.25H1.75a.75.75 0 0 0 0 1.5H4.5v1.25a.75.75 0 0 0 1.5 0v-2Zm9 0a.75.75 0 0 1-.75.75h-6a.75.75 0 0 1 0-1.5h6a.75.75 0 0 1 .75.75Z"></path>
</svg>
</button><tool-tip id="tooltip-4fd1bb25-6be8-4668-bd13-5f52931cf046" for="icon-button-7332adf8-c7e1-459f-851a-62f297f9dd0b" popover="manual" data-direction="s" data-type="label" data-view-component="true" class="sr-only position-absolute">Appearance settings</tool-tip>

      <template data-target="react-partial-anchor.template">
        <link crossorigin="anonymous" media="all" rel="stylesheet" href="https://github.githubassets.com/assets/appearance-settings.6c63a6de228d6520804d.module.css" />

<react-partial
  partial-name="appearance-settings"
  data-ssr="false"
  data-attempted-ssr="false"
  data-react-profiling="false"
>
  
  <script type="application/json" data-target="react-partial.embeddedData">{"props":{}}</script>
  <div data-target="react-partial.reactRoot"></div>
</react-partial>


      </template>
    </react-partial-anchor>
  </div>

          <button type="button" class="sr-only js-header-menu-focus-trap d-block d-lg-none">Resetting focus</button>
        </div>
      </div>
    </div>
  </div>
</header>

      <div hidden="hidden" data-view-component="true" class="js-stale-session-flash stale-session-flash flash flash-warn flash-full">
  
        <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-alert">
    <path d="M6.457 1.047c.659-1.234 2.427-1.234 3.086 0l6.082 11.378A1.75 1.75 0 0 1 14.082 15H1.918a1.75 1.75 0 0 1-1.543-2.575Zm1.763.707a.25.25 0 0 0-.44 0L1.698 13.132a.25.25 0 0 0 .22.368h12.164a.25.25 0 0 0 .22-.368Zm.53 3.996v2.5a.75.75 0 0 1-1.5 0v-2.5a.75.75 0 0 1 1.5 0ZM9 11a1 1 0 1 1-2 0 1 1 0 0 1 2 0Z"></path>
</svg>
        <span class="js-stale-session-flash-signed-in" hidden>You signed in with another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span>
        <span class="js-stale-session-flash-signed-out" hidden>You signed out in another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span>
        <span class="js-stale-session-flash-switched" hidden>You switched accounts on another tab or window. <a class="Link--inTextBlock" href="">Reload</a> to refresh your session.</span>

    <button id="icon-button-3d309ee2-ee59-417f-a973-31e483e0b32d" aria-labelledby="tooltip-93085b06-0c48-4fd2-b91b-56d122f05629" type="button" data-view-component="true" class="Button Button--iconOnly Button--invisible Button--medium flash-close js-flash-close">  <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x Button-visual">
    <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path>
</svg>
</button><tool-tip id="tooltip-93085b06-0c48-4fd2-b91b-56d122f05629" for="icon-button-3d309ee2-ee59-417f-a973-31e483e0b32d" popover="manual" data-direction="s" data-type="label" data-view-component="true" class="sr-only position-absolute">Dismiss alert</tool-tip>


  
</div>
    </div>

  <div id="start-of-content" class="show-on-focus"></div>








    <div id="js-flash-container" class="flash-container" data-turbo-replace>




  <template class="js-flash-template">
    
<div class="flash flash-full   {{ className }}">
  <div >
    <button autofocus class="flash-close js-flash-close" type="button" aria-label="Dismiss this message">
      <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-x">
    <path d="M3.72 3.72a.75.75 0 0 1 1.06 0L8 6.94l3.22-3.22a.749.749 0 0 1 1.275.326.749.749 0 0 1-.215.734L9.06 8l3.22 3.22a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L8 9.06l-3.22 3.22a.751.751 0 0 1-1.042-.018.751.751 0 0 1-.018-1.042L6.94 8 3.72 4.78a.75.75 0 0 1 0-1.06Z"></path>
</svg>
    </button>
    <div aria-atomic="true" role="alert" class="js-flash-alert">
      
      <div>{{ message }}</div>

    </div>
  </div>
</div>
  </template>
</div>


    






  <div
    class="application-main "
    data-commit-hovercards-enabled
    data-discussion-hovercards-enabled
    data-issue-and-pr-hovercards-enabled
    data-project-hovercards-enabled
  >
        <div itemscope itemtype="http://schema.org/SoftwareSourceCode" class="">
    <main id="js-repo-pjax-container" >
      
      
    

    






  
  <div id="repository-container-header"  class="pt-3 hide-full-screen" style="background-color: var(--page-header-bgColor, var(--color-page-header-bg));" data-turbo-replace>

      <div class="d-flex flex-nowrap flex-justify-end mb-3  px-3 px-lg-5" style="gap: 1rem;">

        <div class="flex-auto min-width-0 width-fit">
            
  <div class=" d-flex flex-wrap flex-items-center wb-break-word f3 text-normal">
      <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo color-fg-muted mr-2">
    <path d="M2 2.5A2.5 2.5 0 0 1 4.5 0h8.75a.75.75 0 0 1 .75.75v12.5a.75.75 0 0 1-.75.75h-2.5a.75.75 0 0 1 0-1.5h1.75v-2h-8a1 1 0 0 0-.714 1.7.75.75 0 1 1-1.072 1.05A2.495 2.495 0 0 1 2 11.5Zm10.5-1h-8a1 1 0 0 0-1 1v6.708A2.486 2.486 0 0 1 4.5 9h8ZM5 12.25a.25.25 0 0 1 .25-.25h3.5a.25.25 0 0 1 .25.25v3.25a.25.25 0 0 1-.4.2l-1.45-1.087a.249.249 0 0 0-.3 0L5.4 15.7a.25.25 0 0 1-.4-.2Z"></path>
</svg>
    
    <span class="author flex-self-stretch" itemprop="author">
      <a class="url fn" rel="author" data-hovercard-type="organization" data-hovercard-url="/orgs/cplusplus/hovercard" data-octo-click="hovercard-link-click" data-octo-dimensions="link_type:self" href="/cplusplus">
        cplusplus
</a>    </span>
    <span class="mx-1 flex-self-stretch color-fg-muted">/</span>
    <strong itemprop="name" class="mr-2 flex-self-stretch">
      <a data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" href="/cplusplus/draft">draft</a>
    </strong>

    <span></span><span class="Label Label--secondary v-align-middle mr-1">Public</span>
  </div>


        </div>

        <div id="repository-details-container" class="flex-shrink-0" data-turbo-replace style="max-width: 70%;">
            <ul class="pagehead-actions flex-shrink-0 d-none d-md-inline" style="padding: 2px 0;">
    
      

  <li>
            <a href="/login?return_to=%2Fcplusplus%2Fdraft" rel="nofollow" id="repository-details-watch-button" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;notification subscription menu watch&quot;,&quot;repository_id&quot;:null,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/cplusplus/draft/issues/4710&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="1d85429128c68e3b92745e3126e05bf4ad3d9bf16f4e4a96e6022477f4df3ba3" aria-label="You must be signed in to change notification settings" data-view-component="true" class="btn-sm btn">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-bell mr-2">
    <path d="M8 16a2 2 0 0 0 1.985-1.75c.017-.137-.097-.25-.235-.25h-3.5c-.138 0-.252.113-.235.25A2 2 0 0 0 8 16ZM3 5a5 5 0 0 1 10 0v2.947c0 .05.015.098.042.139l1.703 2.555A1.519 1.519 0 0 1 13.482 13H2.518a1.516 1.516 0 0 1-1.263-2.36l1.703-2.554A.255.255 0 0 0 3 7.947Zm5-3.5A3.5 3.5 0 0 0 4.5 5v2.947c0 .346-.102.683-.294.97l-1.703 2.556a.017.017 0 0 0-.003.01l.001.006c0 .002.002.004.004.006l.006.004.007.001h10.964l.007-.001.006-.004.004-.006.001-.007a.017.017 0 0 0-.003-.01l-1.703-2.554a1.745 1.745 0 0 1-.294-.97V5A3.5 3.5 0 0 0 8 1.5Z"></path>
</svg>Notifications
</a>    <tool-tip id="tooltip-434272fb-573a-452e-afb6-b78fb4d80bf9" for="repository-details-watch-button" popover="manual" data-direction="s" data-type="description" data-view-component="true" class="sr-only position-absolute">You must be signed in to change notification settings</tool-tip>

  </li>

  <li>
          <a icon="repo-forked" id="fork-button" href="/login?return_to=%2Fcplusplus%2Fdraft" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;repo details fork button&quot;,&quot;repository_id&quot;:2216249,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/cplusplus/draft/issues/4710&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="02e05d26d7a829821dfd9cb0c9e23213c2c66f7bc3f2e8f2bf98d6de6b137709" data-view-component="true" class="btn-sm btn">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-repo-forked mr-2">
    <path d="M5 5.372v.878c0 .414.336.75.75.75h4.5a.75.75 0 0 0 .75-.75v-.878a2.25 2.25 0 1 1 1.5 0v.878a2.25 2.25 0 0 1-2.25 2.25h-1.5v2.128a2.251 2.251 0 1 1-1.5 0V8.5h-1.5A2.25 2.25 0 0 1 3.5 6.25v-.878a2.25 2.25 0 1 1 1.5 0ZM5 3.25a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Zm6.75.75a.75.75 0 1 0 0-1.5.75.75 0 0 0 0 1.5Zm-3 8.75a.75.75 0 1 0-1.5 0 .75.75 0 0 0 1.5 0Z"></path>
</svg>Fork
    <span id="repo-network-counter" data-pjax-replace="true" data-turbo-replace="true" title="793" data-view-component="true" class="Counter">793</span>
</a>
  </li>

  <li>
        <div data-view-component="true" class="BtnGroup d-flex">
        <a href="/login?return_to=%2Fcplusplus%2Fdraft" rel="nofollow" data-hydro-click="{&quot;event_type&quot;:&quot;authentication.click&quot;,&quot;payload&quot;:{&quot;location_in_page&quot;:&quot;star button&quot;,&quot;repository_id&quot;:2216249,&quot;auth_type&quot;:&quot;LOG_IN&quot;,&quot;originating_url&quot;:&quot;https://github.com/cplusplus/draft/issues/4710&quot;,&quot;user_id&quot;:null}}" data-hydro-click-hmac="2257a0d308661af177d2d5174184f02eb6e4ee9eeb75ae82df3bc485e620eed1" aria-label="You must be signed in to star a repository" data-view-component="true" class="tooltipped tooltipped-sw btn-sm btn">    <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-star v-align-text-bottom d-inline-block mr-2">
    <path d="M8 .25a.75.75 0 0 1 .673.418l1.882 3.815 4.21.612a.75.75 0 0 1 .416 1.279l-3.046 2.97.719 4.192a.751.751 0 0 1-1.088.791L8 12.347l-3.766 1.98a.75.75 0 0 1-1.088-.79l.72-4.194L.818 6.374a.75.75 0 0 1 .416-1.28l4.21-.611L7.327.668A.75.75 0 0 1 8 .25Zm0 2.445L6.615 5.5a.75.75 0 0 1-.564.41l-3.097.45 2.24 2.184a.75.75 0 0 1 .216.664l-.528 3.084 2.769-1.456a.75.75 0 0 1 .698 0l2.77 1.456-.53-3.084a.75.75 0 0 1 .216-.664l2.24-2.183-3.096-.45a.75.75 0 0 1-.564-.41L8 2.694Z"></path>
</svg><span data-view-component="true" class="d-inline">
          Star
</span>          <span id="repo-stars-counter-star" aria-label="5938 users starred this repository" data-singular-suffix="user starred this repository" data-plural-suffix="users starred this repository" data-turbo-replace="true" title="5,938" data-view-component="true" class="Counter js-social-count">5.9k</span>
</a></div>
  </li>

</ul>

        </div>
      </div>

        <div id="responsive-meta-container" data-turbo-replace>
</div>


          <nav data-pjax="#js-repo-pjax-container" aria-label="Repository" data-view-component="true" class="js-repo-nav js-sidenav-container-pjax js-responsive-underlinenav overflow-hidden UnderlineNav px-3 px-md-4 px-lg-5">

  <ul data-view-component="true" class="UnderlineNav-body list-style-none">
      <li data-view-component="true" class="d-inline-flex">
  <a id="code-tab" href="/cplusplus/draft" data-tab-item="i0code-tab" data-selected-links="repo_source repo_downloads repo_commits repo_releases repo_tags repo_branches repo_packages repo_deployments repo_attestations /cplusplus/draft" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g c" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Code&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
    
              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-code UnderlineNav-octicon d-none d-sm-inline">
    <path d="m11.28 3.22 4.25 4.25a.75.75 0 0 1 0 1.06l-4.25 4.25a.749.749 0 0 1-1.275-.326.749.749 0 0 1 .215-.734L13.94 8l-3.72-3.72a.749.749 0 0 1 .326-1.275.749.749 0 0 1 .734.215Zm-6.56 0a.751.751 0 0 1 1.042.018.751.751 0 0 1 .018 1.042L2.06 8l3.72 3.72a.749.749 0 0 1-.326 1.275.749.749 0 0 1-.734-.215L.47 8.53a.75.75 0 0 1 0-1.06Z"></path>
</svg>
        <span data-content="Code">Code</span>
          <span id="code-repo-tab-count" data-pjax-replace="" data-turbo-replace="" title="Not available" data-view-component="true" class="Counter"></span>


    
</a></li>
      <li data-view-component="true" class="d-inline-flex">
  <a id="issues-tab" href="/cplusplus/draft/issues" data-tab-item="i1issues-tab" data-selected-links="repo_issues repo_labels repo_milestones /cplusplus/draft/issues" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g i" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Issues&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" aria-current="page" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item selected">
    
              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-issue-opened UnderlineNav-octicon d-none d-sm-inline">
    <path d="M8 9.5a1.5 1.5 0 1 0 0-3 1.5 1.5 0 0 0 0 3Z"></path><path d="M8 0a8 8 0 1 1 0 16A8 8 0 0 1 8 0ZM1.5 8a6.5 6.5 0 1 0 13 0 6.5 6.5 0 0 0-13 0Z"></path>
</svg>
        <span data-content="Issues">Issues</span>
          <span id="issues-repo-tab-count" data-pjax-replace="" data-turbo-replace="" title="685" data-view-component="true" class="Counter">685</span>


    
</a></li>
      <li data-view-component="true" class="d-inline-flex">
  <a id="pull-requests-tab" href="/cplusplus/draft/pulls" data-tab-item="i2pull-requests-tab" data-selected-links="repo_pulls checks /cplusplus/draft/pulls" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g p" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Pull requests&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
    
              <svg aria-hidden="true" height="16" viewBox="0 0 16 16" version="1.1" width="16" data-view-component="true" class="octicon octicon-git-pull-request UnderlineNav-octicon d-none d-sm-inline">
    <path d="M1.5 3.25a2.25 2.25 0 1 1 3 2.122v5.256a2.251 2.251 0 1 1-1.5 0V5.372A2.25 2.25 0 0 1 1.5 3.25Zm5.677-.177L9.573.677A.25.25 0 0 1 10 .854V2.5h1A2.5 2.5 0 0 1 13.5 5v5.628a2.251 2.251 0 1 1-1.5 0V5a1 1 0 0 0-1-1h-1v1.646a.25.25 0 0 1-.427.177L7.177 3.427a.25.25 0 0 1 0-.354ZM3.75 2.5a.75.75 0 1 0 0 1.5.75.75 0 0 0 0-1.5Zm0 9.5a.75.75 0 1 0 0 1.5.75.75 0 0 0 0-1.5Zm8.25.75a.75.75 0 1 0 1.5 0 .75.75 0 0 0-1.5 0Z"></path>
</svg>
        <span data-content="Pull requests">Pull requests</span>
          <span id="pull-requests-repo-tab-count" data-pjax-replace="" data-turbo-replace="" title="298" data-view-component="true" class="Counter">298</span>


    
</a></li>
      <li data-view-component="true" class="d-inline-flex">
  <a id="actions-tab" href="/cplusplus/draft/actions" data-tab-item="i3actions-tab" data-selected-links="repo_actions /cplusplus/draft/actions" data-pjax="#repo-content-pjax-container" data-turbo-frame="repo-content-turbo-frame" data-hotkey="g a" data-analytics-event="{&quot;category&quot;:&quot;Underline navbar&quot;,&quot;action&quot;:&quot;Click tab&quot;,&quot;label&quot;:&quot;Actions&quot;,&quot;target&quot;:&quot;UNDERLINE_NAV.TAB&quot;}" data-view-component="true" class="UnderlineNav-item no-wrap js-responsive-underlinenav-item js-selected-navigation-item">
    
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  <script type="application/json" data-target="react-app.embeddedData">{"payload":{"preloaded_records":{},"structured_data":{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Several issues about function parameter scope ","articleBody":"\u003e A parameter-declaration-clause P introduces a function parameter scope that includes P.\r\n\u003e\u003e - If P is **associated with a declarator** and is preceded by a (possibly-parenthesized) noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e, **its scope extends to** the end of the nearest enclosing init-declarator, member-declarator, declarator of a parameter-declaration or a nodeclspec-function-declaration, or function-definition, but does not include the locus of the associated declarator.\r\n\u003e\u003e - If P is associated with a lambda-declarator, its scope extends to the end of the compound-statement in the lambda-expression.\r\n\u003e\u003e - If P is associated with a requirement-parameter-list, its scope extends to the end of the requirement-body of the requires-expression.\r\n\u003e\u003e - If P is associated with a deduction-guide, its scope extends to the end of the deduction-guide.\r\n\r\nPlease see this example:\r\n````cpp\r\nusing rt = auto(*)(int a)-\u003edecltype(a);\r\n````\r\nIt's obviously P is not associated with any **declarator** instead with **abstract-declarator**, let alone whether it is preceded by *noptr-declarator* of the form *declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e*. In this example, the name of the parameter is used in the place that has exceeded the scope of the function parameter scope introduced by P. However, the case is valid in any major implementation other than MSVC. The other bullets are irrelevant with this case. So, it seems the function parameter scope is underspecified for this case.  \r\n***\r\nIssue 2: \r\n````cpp\r\nauto(* ptr(double a))(int b)-\u003edecltype(a);\r\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       int b      )\r\n         init-declarator-\u003e declarator-\u003e noptr-declarator parameters-and-qualifiers  trailing-return-type\r\n                                         ^^^^^^^^^^^^^^^ \r\n                                         ( ptr-declarator )  \r\n                                                  ↓\r\n                                    (  ptr-operator ptr-declarator )\r\n                                                      ↓\r\n                                    (      *      noptr-declarator)   \r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     noptr-declarator parameters-and-qualifiers)\r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     declarator-id    parameters-and-qualifiers)\r\n                                                  ^^^^^^^^^\r\n                                                   ptr\r\n````\r\nFirst of all, this case is rejected by all major implementations. Assume the parameter-declaration-clause that comprises the parameter declaration `double a` is called P1, the other(comprises `int b`) is called P2. As shown in the Figure, P1 is associated with the declarator of the complete declaration and is preceded by *noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e* that is `ptr`. In terms of the first bullet in the above, the scope should be extended to the nearest enclosing  **init-declarator** `(* ptr(double a))(int b)-\u003edecltype(a)` since the other cases(member-declarator...) are all not suitable here. Hence, the use of the identifier `a` within `decltype` should be valid. But this conclusion is denied by implementations.","author":{"url":"https://github.com/xmh0511","@type":"Person","name":"xmh0511"},"datePublished":"2021-06-21T04:53:49.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":3},"url":"https://github.com/4710/draft/issues/4710"},"preloadedQueries":[{"queryId":"cee21fcf82c877ad153a2db35b36eb94","queryName":"IssueViewerViewQuery","variables":{"count":15,"id":"repository","number":4710,"owner":"cplusplus","repo":"draft"},"result":{"data":{"repository":{"isOwnerEnterpriseManaged":false,"issue":{"id":"MDU6SXNzdWU5MjU4MjI3NTQ=","updatedAt":"2021-07-02T01:11:51Z","title":"Several issues about function parameter scope ","number":4710,"repository":{"nameWithOwner":"cplusplus/draft","id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5","name":"draft","owner":{"__typename":"Organization","login":"cplusplus","id":"MDEyOk9yZ2FuaXphdGlvbjU5Mjc2","url":"https://github.com/cplusplus","databaseId":59276},"isArchived":false,"isPrivate":false,"databaseId":2216249,"slashCommandsEnabled":false,"visibility":"PUBLIC","viewerCanPush":false,"viewerCanInteract":false,"viewerInteractionLimitReasonHTML":"","planFeatures":{"maximumAssignees":10},"isCopilotAgentEnabled":null,"pinnedIssues":{"totalCount":0},"viewerCanPinIssues":false,"viewerIssueCreationPermissions":{"triageable":false},"issueTypes":{"edges":[{"node":{"id":"IT_kwDN54zOAAFvmw"}},{"node":{"id":"IT_kwDN54zOAAFvnQ"}},{"node":{"id":"IT_kwDN54zOAAFvog"}}]}},"titleHTML":"Several issues about function parameter scope ","url":"https://github.com/cplusplus/draft/issues/4710","viewerCanUpdateNext":false,"issueType":null,"state":"OPEN","stateReason":null,"duplicateOf":null,"linkedPullRequests":{"nodes":[]},"subIssuesSummary":{"total":0,"completed":0},"__isLabelable":"Issue","labels":{"edges":[],"pageInfo":{"endCursor":null,"hasNextPage":false}},"__isNode":"Issue","assignedActors":{"nodes":[]},"milestone":null,"databaseId":925822754,"viewerDidAuthor":false,"locked":false,"author":{"__typename":"User","__isActor":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx","profileUrl":"https://github.com/xmh0511","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4"},"__isComment":"Issue","body":"\u003e A parameter-declaration-clause P introduces a function parameter scope that includes P.\r\n\u003e\u003e - If P is **associated with a declarator** and is preceded by a (possibly-parenthesized) noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e, **its scope extends to** the end of the nearest enclosing init-declarator, member-declarator, declarator of a parameter-declaration or a nodeclspec-function-declaration, or function-definition, but does not include the locus of the associated declarator.\r\n\u003e\u003e - If P is associated with a lambda-declarator, its scope extends to the end of the compound-statement in the lambda-expression.\r\n\u003e\u003e - If P is associated with a requirement-parameter-list, its scope extends to the end of the requirement-body of the requires-expression.\r\n\u003e\u003e - If P is associated with a deduction-guide, its scope extends to the end of the deduction-guide.\r\n\r\nPlease see this example:\r\n````cpp\r\nusing rt = auto(*)(int a)-\u003edecltype(a);\r\n````\r\nIt's obviously P is not associated with any **declarator** instead with **abstract-declarator**, let alone whether it is preceded by *noptr-declarator* of the form *declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e*. In this example, the name of the parameter is used in the place that has exceeded the scope of the function parameter scope introduced by P. However, the case is valid in any major implementation other than MSVC. The other bullets are irrelevant with this case. So, it seems the function parameter scope is underspecified for this case.  \r\n***\r\nIssue 2: \r\n````cpp\r\nauto(* ptr(double a))(int b)-\u003edecltype(a);\r\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       int b      )\r\n         init-declarator-\u003e declarator-\u003e noptr-declarator parameters-and-qualifiers  trailing-return-type\r\n                                         ^^^^^^^^^^^^^^^ \r\n                                         ( ptr-declarator )  \r\n                                                  ↓\r\n                                    (  ptr-operator ptr-declarator )\r\n                                                      ↓\r\n                                    (      *      noptr-declarator)   \r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     noptr-declarator parameters-and-qualifiers)\r\n                                                      ↓\r\n                                                                   (  double a     )\r\n                                    (      *     declarator-id    parameters-and-qualifiers)\r\n                                                  ^^^^^^^^^\r\n                                                   ptr\r\n````\r\nFirst of all, this case is rejected by all major implementations. Assume the parameter-declaration-clause that comprises the parameter declaration `double a` is called P1, the other(comprises `int b`) is called P2. As shown in the Figure, P1 is associated with the declarator of the complete declaration and is preceded by *noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e* that is `ptr`. In terms of the first bullet in the above, the scope should be extended to the nearest enclosing  **init-declarator** `(* ptr(double a))(int b)-\u003edecltype(a)` since the other cases(member-declarator...) are all not suitable here. Hence, the use of the identifier `a` within `decltype` should be valid. But this conclusion is denied by implementations.","bodyHTML":"\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eA parameter-declaration-clause P introduces a function parameter scope that includes P.\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cul dir=\"auto\"\u003e\n\u003cli\u003eIf P is \u003cstrong\u003eassociated with a declarator\u003c/strong\u003e and is preceded by a (possibly-parenthesized) noptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e, \u003cstrong\u003eits scope extends to\u003c/strong\u003e the end of the nearest enclosing init-declarator, member-declarator, declarator of a parameter-declaration or a nodeclspec-function-declaration, or function-definition, but does not include the locus of the associated declarator.\u003c/li\u003e\n\u003cli\u003eIf P is associated with a lambda-declarator, its scope extends to the end of the compound-statement in the lambda-expression.\u003c/li\u003e\n\u003cli\u003eIf P is associated with a requirement-parameter-list, its scope extends to the end of the requirement-body of the requires-expression.\u003c/li\u003e\n\u003cli\u003eIf P is associated with a deduction-guide, its scope extends to the end of the deduction-guide.\u003c/li\u003e\n\u003c/ul\u003e\n\u003c/blockquote\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003ePlease see this example:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"using rt = auto(*)(int a)-\u0026gt;decltype(a);\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003eusing\u003c/span\u003e rt = \u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e(*)(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e a)-\u0026gt;\u003cspan class=\"pl-en\"\u003edecltype\u003c/span\u003e(a);\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eIt's obviously P is not associated with any \u003cstrong\u003edeclarator\u003c/strong\u003e instead with \u003cstrong\u003eabstract-declarator\u003c/strong\u003e, let alone whether it is preceded by \u003cem\u003enoptr-declarator\u003c/em\u003e of the form \u003cem\u003edeclarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e\u003c/em\u003e. In this example, the name of the parameter is used in the place that has exceeded the scope of the function parameter scope introduced by P. However, the case is valid in any major implementation other than MSVC. The other bullets are irrelevant with this case. So, it seems the function parameter scope is underspecified for this case.\u003c/p\u003e\n\u003chr\u003e\n\u003cp dir=\"auto\"\u003eIssue 2:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"auto(* ptr(double a))(int b)-\u0026gt;decltype(a);\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       int b      )\n         init-declarator-\u0026gt; declarator-\u0026gt; noptr-declarator parameters-and-qualifiers  trailing-return-type\n                                         ^^^^^^^^^^^^^^^ \n                                         ( ptr-declarator )  \n                                                  ↓\n                                    (  ptr-operator ptr-declarator )\n                                                      ↓\n                                    (      *      noptr-declarator)   \n                                                      ↓\n                                                                   (  double a     )\n                                    (      *     noptr-declarator parameters-and-qualifiers)\n                                                      ↓\n                                                                   (  double a     )\n                                    (      *     declarator-id    parameters-and-qualifiers)\n                                                  ^^^^^^^^^\n                                                   ptr\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e(* \u003cspan class=\"pl-en\"\u003eptr\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003edouble\u003c/span\u003e a))(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e b)-\u0026gt;decltype(a);\n    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       \u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e b      )\n         init-declarator-\u0026gt; declarator-\u0026gt; noptr-declarator parameters-\u003cspan class=\"pl-k\"\u003eand\u003c/span\u003e-qualifiers  trailing-\u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e-type\n                                         ^^^^^^^^^^^^^^^ \n                                         ( ptr-declarator )  \n                                                  ↓\n                                    (  ptr-\u003cspan class=\"pl-k\"\u003eoperator\u003c/span\u003e ptr-declarator )\n                                                      ↓\n                                    (      *      noptr-declarator)   \n                                                      ↓\n                                                                   (  \u003cspan class=\"pl-k\"\u003edouble\u003c/span\u003e a     )\n                                    (      *     noptr-declarator parameters-\u003cspan class=\"pl-k\"\u003eand\u003c/span\u003e-qualifiers)\n                                                      ↓\n                                                                   (  \u003cspan class=\"pl-k\"\u003edouble\u003c/span\u003e a     )\n                                    (      *     declarator-id    parameters-\u003cspan class=\"pl-k\"\u003eand\u003c/span\u003e-qualifiers)\n                                                  ^^^^^^^^^\n                                                   ptr\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eFirst of all, this case is rejected by all major implementations. Assume the parameter-declaration-clause that comprises the parameter declaration \u003ccode class=\"notranslate\"\u003edouble a\u003c/code\u003e is called P1, the other(comprises \u003ccode class=\"notranslate\"\u003eint b\u003c/code\u003e) is called P2. As shown in the Figure, P1 is associated with the declarator of the complete declaration and is preceded by \u003cem\u003enoptr-declarator of the form declarator-id attribute-specifier-seq \u003csub\u003eopt\u003c/sub\u003e\u003c/em\u003e that is \u003ccode class=\"notranslate\"\u003eptr\u003c/code\u003e. In terms of the first bullet in the above, the scope should be extended to the nearest enclosing  \u003cstrong\u003einit-declarator\u003c/strong\u003e \u003ccode class=\"notranslate\"\u003e(* ptr(double a))(int b)-\u0026gt;decltype(a)\u003c/code\u003e since the other cases(member-declarator...) are all not suitable here. Hence, the use of the identifier \u003ccode class=\"notranslate\"\u003ea\u003c/code\u003e within \u003ccode class=\"notranslate\"\u003edecltype\u003c/code\u003e should be valid. But this conclusion is denied by implementations.\u003c/p\u003e","bodyVersion":"0c283d6818b7577420c081685827258addbddf39b71d9de1b9766521d68bc5f4","createdAt":"2021-06-21T04:53:49Z","__isReactable":"Issue","reactionGroups":[{"content":"THUMBS_UP","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"THUMBS_DOWN","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"LAUGH","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HOORAY","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"CONFUSED","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HEART","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"ROCKET","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"EYES","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}}],"viewerCanUpdateMetadata":false,"viewerCanComment":false,"viewerCanAssign":false,"viewerCanLabel":false,"__isIssueOrPullRequest":"Issue","projectItemsNext":{"edges":[],"pageInfo":{"endCursor":null,"hasNextPage":false}},"viewerCanSetMilestone":false,"isPinned":false,"viewerCanDelete":false,"viewerCanTransfer":false,"viewerCanConvertToDiscussion":false,"viewerCanLock":false,"viewerCanType":false,"viewerCanSetFields":false,"issueFieldValues":{"nodes":[]},"frontTimelineItems":{"pageInfo":{"hasNextPage":false,"endCursor":"Y3Vyc29yOnYyOpPPAAABejFuomAAqTg2NTQ2MTE2NQ=="},"totalCount":6,"edges":[{"node":{"__typename":"RenamedTitleEvent","__isIssueTimelineItems":"RenamedTitleEvent","__isTimelineEvent":"RenamedTitleEvent","databaseId":4914511293,"createdAt":"2021-06-21T04:55:54Z","actor":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx","__isActor":"User","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?s=64\u0026u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4","profileResourcePath":"/xmh0511"},"currentTitle":"Function parameter scope of the abtract-declarator","previousTitle":"Function parameter scope of abtract-declarator","__isNode":"RenamedTitleEvent","id":"MDE3OlJlbmFtZWRUaXRsZUV2ZW50NDkxNDUxMTI5Mw=="},"cursor":"Y3Vyc29yOnYyOpPPAAABeizsy5ABqjQ5MTQ1MTEyOTM="},{"node":{"__typename":"RenamedTitleEvent","__isIssueTimelineItems":"RenamedTitleEvent","__isTimelineEvent":"RenamedTitleEvent","databaseId":4914511520,"createdAt":"2021-06-21T04:56:01Z","actor":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx","__isActor":"User","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?s=64\u0026u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4","profileResourcePath":"/xmh0511"},"currentTitle":"Function parameter scope of the abstract-declarator","previousTitle":"Function parameter scope of the abtract-declarator","__isNode":"RenamedTitleEvent","id":"MDE3OlJlbmFtZWRUaXRsZUV2ZW50NDkxNDUxMTUyMA=="},"cursor":"Y3Vyc29yOnYyOpPPAAABeizs5ugBqjQ5MTQ1MTE1MjA="},{"node":{"__typename":"RenamedTitleEvent","__isIssueTimelineItems":"RenamedTitleEvent","__isTimelineEvent":"RenamedTitleEvent","databaseId":4915361704,"createdAt":"2021-06-21T08:32:27Z","actor":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx","__isActor":"User","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?s=64\u0026u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4","profileResourcePath":"/xmh0511"},"currentTitle":"Several issues about function parameter scope ","previousTitle":"Function parameter scope of the abstract-declarator","__isNode":"RenamedTitleEvent","id":"MDE3OlJlbmFtZWRUaXRsZUV2ZW50NDkxNTM2MTcwNA=="},"cursor":"Y3Vyc29yOnYyOpPPAAABei2zDXgBqjQ5MTUzNjE3MDQ="},{"node":{"__typename":"IssueComment","__isIssueTimelineItems":"IssueComment","databaseId":864984688,"viewerDidAuthor":false,"issue":{"author":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDU6SXNzdWU5MjU4MjI3NTQ=","number":4710,"locked":false,"databaseId":925822754},"author":{"__typename":"User","login":"xmh0511","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4","profileUrl":"https://github.com/xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDEyOklzc3VlQ29tbWVudDg2NDk4NDY4OA==","body":"The first issue might be interpreted by the following rule: \r\n\u003e In all contexts, a declarator is interpreted as given below. Where an abstract-declarator can be used (or omitted) in place of a declarator ([dcl.fct], [except.pre]), it is as if a unique identifier were included in the appropriate place ([dcl.name]).    \r\n\r\nThat means MSVC has a wrong implementation. The second issue still remains no explanation.","bodyHTML":"\u003cp dir=\"auto\"\u003eThe first issue might be interpreted by the following rule:\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eIn all contexts, a declarator is interpreted as given below. Where an abstract-declarator can be used (or omitted) in place of a declarator ([dcl.fct], [except.pre]), it is as if a unique identifier were included in the appropriate place ([dcl.name]).\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eThat means MSVC has a wrong implementation. The second issue still remains no explanation.\u003c/p\u003e","bodyVersion":"85981b663723fac3f304d094a7e2980d79bc65e8bc156b9b9779e30ac422e9a3","viewerCanUpdate":false,"url":"https://github.com/cplusplus/draft/issues/4710#issuecomment-864984688","createdAt":"2021-06-21T12:14:06Z","authorAssociation":"CONTRIBUTOR","viewerCanDelete":false,"viewerCanMinimize":false,"viewerCanUnminimize":false,"viewerCanReport":false,"viewerCanReportToMaintainer":false,"viewerCanBlockFromOrg":false,"viewerCanUnblockFromOrg":false,"viaApp":null,"isHidden":false,"minimizedReason":null,"showSpammyBadge":false,"createdViaEmail":false,"authorToRepoOwnerSponsorship":null,"repository":{"id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5","name":"draft","owner":{"__typename":"Organization","id":"MDEyOk9yZ2FuaXphdGlvbjU5Mjc2","login":"cplusplus","url":"https://github.com/cplusplus"},"isPrivate":false,"slashCommandsEnabled":false,"nameWithOwner":"cplusplus/draft","databaseId":2216249},"__isComment":"IssueComment","viewerCanReadUserContentEdits":true,"lastEditedAt":"2021-06-21T12:14:16Z","lastUserContentEdit":{"editor":{"__typename":"User","url":"https://github.com/xmh0511","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDE1OlVzZXJDb250ZW50RWRpdElzc3VlQ29tbWVudEVkaXQ6NDcxNDc4OTEy"},"__isReactable":"IssueComment","reactionGroups":[{"content":"THUMBS_UP","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"THUMBS_DOWN","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"LAUGH","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HOORAY","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"CONFUSED","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HEART","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"ROCKET","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"EYES","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}}],"__isNode":"IssueComment"},"cursor":"Y3Vyc29yOnYyOpPPAAABei59-rAAqTg2NDk4NDY4OA=="},{"node":{"__typename":"IssueComment","__isIssueTimelineItems":"IssueComment","databaseId":865200268,"viewerDidAuthor":false,"issue":{"author":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDU6SXNzdWU5MjU4MjI3NTQ=","number":4710,"locked":false,"databaseId":925822754},"author":{"__typename":"User","login":"opensdh","avatarUrl":"https://avatars.githubusercontent.com/u/51904686?u=7f7aa4a0e0db073e1dc98fa6683ba3bed889e6e4\u0026v=4","profileUrl":"https://github.com/opensdh","id":"MDQ6VXNlcjUxOTA0Njg2"},"id":"MDEyOklzc3VlQ29tbWVudDg2NTIwMDI2OA==","body":"First, this is not the place to file core issues, even if Jens is often kind enough to relay them.\r\n\r\nConsidering that\r\n```cpp\r\nauto f(int) -\u003e int;\r\nauto (*p)(int a) -\u003e decltype(a) = f;\r\n```\r\nis accepted by all of the usual suspects but that\r\n```cpp\r\ntemplate\u003cclass T\u003e int g(std::remove_pointer_t\u003cT\u003e);\r\nint (*q)(int a) = g\u003cdecltype(a)\u003e;\r\n```\r\nis just as universally rejected, we evidently need a new rule for non-function declarations that doesn't use _init-declarator_ as the extent.  You're right about the case of a function returning a function pointer, but we need to figure out what the rule should be for non-function declarations before we try to fix the \"function but not the outermost function declarator\" case.","bodyHTML":"\u003cp dir=\"auto\"\u003eFirst, this is not the place to file core issues, even if Jens is often kind enough to relay them.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eConsidering that\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"auto f(int) -\u0026gt; int;\nauto (*p)(int a) -\u0026gt; decltype(a) = f;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ef\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e) -\u0026gt; int;\n\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e (*p)(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e a) -\u0026gt; \u003cspan class=\"pl-en\"\u003edecltype\u003c/span\u003e(a) = f;\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eis accepted by all of the usual suspects but that\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"template\u0026lt;class T\u0026gt; int g(std::remove_pointer_t\u0026lt;T\u0026gt;);\nint (*q)(int a) = g\u0026lt;decltype(a)\u0026gt;;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003etemplate\u003c/span\u003e\u0026lt;\u003cspan class=\"pl-k\"\u003eclass\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eT\u003c/span\u003e\u0026gt; \u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eg\u003c/span\u003e(std::\u003cspan class=\"pl-c1\"\u003eremove_pointer_t\u003c/span\u003e\u0026lt;T\u0026gt;);\n\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e (*q)(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e a) = g\u0026lt;\u003cspan class=\"pl-k\"\u003edecltype\u003c/span\u003e(a)\u0026gt;;\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eis just as universally rejected, we evidently need a new rule for non-function declarations that doesn't use \u003cem\u003einit-declarator\u003c/em\u003e as the extent.  You're right about the case of a function returning a function pointer, but we need to figure out what the rule should be for non-function declarations before we try to fix the \"function but not the outermost function declarator\" case.\u003c/p\u003e","bodyVersion":"da41d170a05a59c7d899da8f61b35710a83183d6bc88b7432c243c023713c309","viewerCanUpdate":false,"url":"https://github.com/cplusplus/draft/issues/4710#issuecomment-865200268","createdAt":"2021-06-21T17:05:47Z","authorAssociation":"CONTRIBUTOR","viewerCanDelete":false,"viewerCanMinimize":false,"viewerCanUnminimize":false,"viewerCanReport":false,"viewerCanReportToMaintainer":false,"viewerCanBlockFromOrg":false,"viewerCanUnblockFromOrg":false,"viaApp":null,"isHidden":false,"minimizedReason":null,"showSpammyBadge":false,"createdViaEmail":false,"authorToRepoOwnerSponsorship":null,"repository":{"id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5","name":"draft","owner":{"__typename":"Organization","id":"MDEyOk9yZ2FuaXphdGlvbjU5Mjc2","login":"cplusplus","url":"https://github.com/cplusplus"},"isPrivate":false,"slashCommandsEnabled":false,"nameWithOwner":"cplusplus/draft","databaseId":2216249},"__isComment":"IssueComment","viewerCanReadUserContentEdits":true,"lastEditedAt":null,"lastUserContentEdit":null,"__isReactable":"IssueComment","reactionGroups":[{"content":"THUMBS_UP","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"THUMBS_DOWN","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"LAUGH","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HOORAY","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"CONFUSED","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HEART","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"ROCKET","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"EYES","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}}],"__isNode":"IssueComment"},"cursor":"Y3Vyc29yOnYyOpPPAAABei-JBfgAqTg2NTIwMDI2OA=="},{"node":{"__typename":"IssueComment","__isIssueTimelineItems":"IssueComment","databaseId":865461165,"viewerDidAuthor":false,"issue":{"author":{"__typename":"User","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDU6SXNzdWU5MjU4MjI3NTQ=","number":4710,"locked":false,"databaseId":925822754},"author":{"__typename":"User","login":"xmh0511","avatarUrl":"https://avatars.githubusercontent.com/u/17973891?u=4644fae26cfb3747712a5956cb193f4067b86016\u0026v=4","profileUrl":"https://github.com/xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDEyOklzc3VlQ29tbWVudDg2NTQ2MTE2NQ==","body":"\u003e First, this is not the place to file core issues, even if Jens is often kind enough to relay them.\r\n\u003e \r\n\u003e Considering that\r\n\u003e \r\n\u003e ```c++\r\n\u003e auto f(int) -\u003e int;\r\n\u003e auto (*p)(int a) -\u003e decltype(a) = f;\r\n\u003e ```\r\n\u003e \r\n\u003e is accepted by all of the usual suspects but that\r\n\u003e \r\n\u003e ```c++\r\n\u003e template\u003cclass T\u003e int g(std::remove_pointer_t\u003cT\u003e);\r\n\u003e int (*q)(int a) = g\u003cdecltype(a)\u003e;\r\n\u003e ```\r\n\u003e \r\n\u003e is just as universally rejected, we evidently need a new rule for non-function declarations that doesn't use _init-declarator_ as the extent. You're right about the case of a function returning a function pointer, but we need to figure out what the rule should be for non-function declarations before we try to fix the \"function but not the outermost function declarator\" case.\r\n\r\n@jensmaurer Thanks. @opensdh  I just don't find an high efficiently channel to discuss these issues except here. Back to the issue itself, if the behavior of these implementations is correct, we might need to define the rule for concept what is `P` associated with a **declarator**(which declarator is it?), it might be:   \r\n\r\n\u003e \u003cdel\u003e P is associated with a **declarator** of which a parameters-and-qualifiers is a direct component and the parameters-and-qualifiers **directly enclose** the P, and the **declarator** has the form *noptr-declarator parameters-and-qualifiers trailing-return-type* or *noptr-declarator parameters-and-qualifiers*. \u003c/del\u003e\r\n\u003e P is associated with a component if P is firstly introduced by the component (i.e, P is the direct component of that component on grammar).  \r\n\u003e\r\n\u003e If P is associated with a declarator, its scope extends to the end of the declarator, or function-definition of which the declarator declares a function. \r\n\r\nExample:\r\n````cpp\r\nauto(* ptr(double a))(int b)-\u003edecltype(b); //ok  auto D(int b)-\u003e decltype(b), b extends to the end of the declarator\r\n\r\nauto(* fun(double a))(int b)-\u003eint{\r\n    a = 1;   //ok  fun(double a) declares a function, a can be named here\r\n    b = 0; //error auto (* D)(int b)-\u003eint, since `(* D)(int b)-\u003eint` does not declare a function\r\n    return nullptr;\r\n}\r\n````","bodyHTML":"\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003eFirst, this is not the place to file core issues, even if Jens is often kind enough to relay them.\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eConsidering that\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"auto f(int) -\u0026gt; int;\nauto (*p)(int a) -\u0026gt; decltype(a) = f;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e \u003cspan class=\"pl-en\"\u003ef\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e) -\u0026gt; int;\n\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e (*p)(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e a) -\u0026gt; \u003cspan class=\"pl-en\"\u003edecltype\u003c/span\u003e(a) = f;\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eis accepted by all of the usual suspects but that\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"template\u0026lt;class T\u0026gt; int g(std::remove_pointer_t\u0026lt;T\u0026gt;);\nint (*q)(int a) = g\u0026lt;decltype(a)\u0026gt;;\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003etemplate\u003c/span\u003e\u0026lt;\u003cspan class=\"pl-k\"\u003eclass\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eT\u003c/span\u003e\u0026gt; \u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e \u003cspan class=\"pl-en\"\u003eg\u003c/span\u003e(std::\u003cspan class=\"pl-c1\"\u003eremove_pointer_t\u003c/span\u003e\u0026lt;T\u0026gt;);\n\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e (*q)(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e a) = g\u0026lt;\u003cspan class=\"pl-k\"\u003edecltype\u003c/span\u003e(a)\u0026gt;;\u003c/pre\u003e\u003c/div\u003e\n\u003cp dir=\"auto\"\u003eis just as universally rejected, we evidently need a new rule for non-function declarations that doesn't use \u003cem\u003einit-declarator\u003c/em\u003e as the extent. You're right about the case of a function returning a function pointer, but we need to figure out what the rule should be for non-function declarations before we try to fix the \"function but not the outermost function declarator\" case.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003ca class=\"user-mention notranslate\" data-hovercard-type=\"user\" data-hovercard-url=\"/users/jensmaurer/hovercard\" data-octo-click=\"hovercard-link-click\" data-octo-dimensions=\"link_type:self\" href=\"https://github.com/jensmaurer\"\u003e@jensmaurer\u003c/a\u003e Thanks. \u003ca class=\"user-mention notranslate\" data-hovercard-type=\"user\" data-hovercard-url=\"/users/opensdh/hovercard\" data-octo-click=\"hovercard-link-click\" data-octo-dimensions=\"link_type:self\" href=\"https://github.com/opensdh\"\u003e@opensdh\u003c/a\u003e  I just don't find an high efficiently channel to discuss these issues except here. Back to the issue itself, if the behavior of these implementations is correct, we might need to define the rule for concept what is \u003ccode class=\"notranslate\"\u003eP\u003c/code\u003e associated with a \u003cstrong\u003edeclarator\u003c/strong\u003e(which declarator is it?), it might be:\u003c/p\u003e\n\u003cblockquote\u003e\n\u003cp dir=\"auto\"\u003e\u003cdel\u003e P is associated with a \u003cstrong\u003edeclarator\u003c/strong\u003e of which a parameters-and-qualifiers is a direct component and the parameters-and-qualifiers \u003cstrong\u003edirectly enclose\u003c/strong\u003e the P, and the \u003cstrong\u003edeclarator\u003c/strong\u003e has the form \u003cem\u003enoptr-declarator parameters-and-qualifiers trailing-return-type\u003c/em\u003e or \u003cem\u003enoptr-declarator parameters-and-qualifiers\u003c/em\u003e. \u003c/del\u003e\u003cbr\u003e\nP is associated with a component if P is firstly introduced by the component (i.e, P is the direct component of that component on grammar).\u003c/p\u003e\n\u003cp dir=\"auto\"\u003eIf P is associated with a declarator, its scope extends to the end of the declarator, or function-definition of which the declarator declares a function.\u003c/p\u003e\n\u003c/blockquote\u003e\n\u003cp dir=\"auto\"\u003eExample:\u003c/p\u003e\n\u003cdiv class=\"highlight highlight-source-c++ notranslate position-relative overflow-auto\" dir=\"auto\" data-snippet-clipboard-copy-content=\"auto(* ptr(double a))(int b)-\u0026gt;decltype(b); //ok  auto D(int b)-\u0026gt; decltype(b), b extends to the end of the declarator\n\nauto(* fun(double a))(int b)-\u0026gt;int{\n    a = 1;   //ok  fun(double a) declares a function, a can be named here\n    b = 0; //error auto (* D)(int b)-\u0026gt;int, since `(* D)(int b)-\u0026gt;int` does not declare a function\n    return nullptr;\n}\"\u003e\u003cpre class=\"notranslate\"\u003e\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e(* \u003cspan class=\"pl-en\"\u003eptr\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003edouble\u003c/span\u003e a))(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e b)-\u0026gt;decltype(b); \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003eok  auto D(int b)-\u0026gt; decltype(b), b extends to the end of the declarator\u003c/span\u003e\n\n\u003cspan class=\"pl-k\"\u003eauto\u003c/span\u003e(* \u003cspan class=\"pl-en\"\u003efun\u003c/span\u003e(\u003cspan class=\"pl-k\"\u003edouble\u003c/span\u003e a))(\u003cspan class=\"pl-k\"\u003eint\u003c/span\u003e b)-\u0026gt;int{\n    a = \u003cspan class=\"pl-c1\"\u003e1\u003c/span\u003e;   \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003eok  fun(double a) declares a function, a can be named here\u003c/span\u003e\n    b = \u003cspan class=\"pl-c1\"\u003e0\u003c/span\u003e; \u003cspan class=\"pl-c\"\u003e\u003cspan class=\"pl-c\"\u003e//\u003c/span\u003eerror auto (* D)(int b)-\u0026gt;int, since `(* D)(int b)-\u0026gt;int` does not declare a function\u003c/span\u003e\n    \u003cspan class=\"pl-k\"\u003ereturn\u003c/span\u003e \u003cspan class=\"pl-c1\"\u003enullptr\u003c/span\u003e;\n}\u003c/pre\u003e\u003c/div\u003e","bodyVersion":"69c82aa5f097283c6dc7b59487632c81049fd3ed5f073efa501ce2fc28d1382f","viewerCanUpdate":false,"url":"https://github.com/cplusplus/draft/issues/4710#issuecomment-865461165","createdAt":"2021-06-22T01:56:12Z","authorAssociation":"CONTRIBUTOR","viewerCanDelete":false,"viewerCanMinimize":false,"viewerCanUnminimize":false,"viewerCanReport":false,"viewerCanReportToMaintainer":false,"viewerCanBlockFromOrg":false,"viewerCanUnblockFromOrg":false,"viaApp":null,"isHidden":false,"minimizedReason":null,"showSpammyBadge":false,"createdViaEmail":false,"authorToRepoOwnerSponsorship":null,"repository":{"id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5","name":"draft","owner":{"__typename":"Organization","id":"MDEyOk9yZ2FuaXphdGlvbjU5Mjc2","login":"cplusplus","url":"https://github.com/cplusplus"},"isPrivate":false,"slashCommandsEnabled":false,"nameWithOwner":"cplusplus/draft","databaseId":2216249},"__isComment":"IssueComment","viewerCanReadUserContentEdits":true,"lastEditedAt":"2021-07-02T01:11:51Z","lastUserContentEdit":{"editor":{"__typename":"User","url":"https://github.com/xmh0511","login":"xmh0511","id":"MDQ6VXNlcjE3OTczODkx"},"id":"MDE1OlVzZXJDb250ZW50RWRpdElzc3VlQ29tbWVudEVkaXQ6NDc0OTI3MjQ2"},"__isReactable":"IssueComment","reactionGroups":[{"content":"THUMBS_UP","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"THUMBS_DOWN","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"LAUGH","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HOORAY","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"CONFUSED","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"HEART","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"ROCKET","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}},{"content":"EYES","viewerHasReacted":false,"reactors":{"totalCount":0,"nodes":[]}}],"__isNode":"IssueComment"},"cursor":"Y3Vyc29yOnYyOpPPAAABejFuomAAqTg2NTQ2MTE2NQ=="}]},"backTimelineItems":{"pageInfo":{"hasPreviousPage":true,"startCursor":null},"totalCount":6,"edges":[]}},"id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5"},"safeViewer":null}},"timestamp":1759108795}]},"title":null,"appPayload":{"initial_view_content":{"team_id":null,"can_edit_view":true},"current_user":null,"current_user_settings":{"preferred_emoji_skin_tone":null,"copilot_show_functionality":false,"use_single_key_shortcut":false},"paste_url_link_as_plain_text":false,"base_avatar_url":"https://avatars.githubusercontent.com","help_url":"https://docs.github.com","sso_organizations":null,"current_sso_orgs_match_dismissed_cookie":null,"multi_tenant":false,"tracing":false,"tracing_flamegraph":false,"catalog_service":"github/issues","scoped_repository":{"id":"MDEwOlJlcG9zaXRvcnkyMjE2MjQ5","owner":"cplusplus","name":"draft","is_archived":false},"enabled_features":{"use_pull_request_subscriptions_enabled":false,"pull_request_single_subscription":true,"disable_issues_react_ssr":false,"issue_dependencies":true,"copilot_natural_language_github_search":false,"private_avatars":false,"reserved_domain":true,"projects_classic_sunset_override":false,"issues_react_bypass_es_limits":true,"notifyd_issue_watch_activity_notify":false,"notifyd_enable_issue_thread_subscriptions":false,"timeline_best_effort_count_optimization":false,"copilot_auto_assign_metadata":false,"issues_react_bots_timeline_pagination":true,"copilot_workspace_cross_repo_selection":false,"copilot_agent_mode":true,"issues_react_force_turbo_nav":false,"copilot_swe_agent":true,"copilot_workspace":null,"tasklist_block":false,"issues_react_perf_test":false}}}</script>
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id=":R3sldklmb:">Issue body actions</span></div></div></div></div></div><div class="IssueBodyViewer-module__IssueBody--Zg6Wy" id="issue-body-viewer" data-testid="issue-body-viewer"><div data-testid="markdown-body" data-team-hovercards-enabled="true" class="markdown-body" data-turbolinks="false"><div class="Box-sc-g0xbh4-0 markdown-body NewMarkdownViewer-module__safe-html-box--dKCgP"><blockquote>
<p dir="auto">A parameter-declaration-clause P introduces a function parameter scope that includes P.</p>
<blockquote>
<ul dir="auto">
<li>If P is <strong>associated with a declarator</strong> and is preceded by a (possibly-parenthesized) noptr-declarator of the form declarator-id attribute-specifier-seq <sub>opt</sub>, <strong>its scope extends to</strong> the end of the nearest enclosing init-declarator, member-declarator, declarator of a parameter-declaration or a nodeclspec-function-declaration, or function-definition, but does not include the locus of the associated declarator.</li>
<li>If P is associated with a lambda-declarator, its scope extends to the end of the compound-statement in the lambda-expression.</li>
<li>If P is associated with a requirement-parameter-list, its scope extends to the end of the requirement-body of the requires-expression.</li>
<li>If P is associated with a deduction-guide, its scope extends to the end of the deduction-guide.</li>
</ul>
</blockquote>
</blockquote>
<p dir="auto">Please see this example:</p>
<div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="using rt = auto(*)(int a)-&gt;decltype(a);"><pre class="notranslate"><span class="pl-k">using</span> rt = <span class="pl-k">auto</span>(*)(<span class="pl-k">int</span> a)-&gt;<span class="pl-en">decltype</span>(a);</pre></div>
<p dir="auto">It's obviously P is not associated with any <strong>declarator</strong> instead with <strong>abstract-declarator</strong>, let alone whether it is preceded by <em>noptr-declarator</em> of the form <em>declarator-id attribute-specifier-seq <sub>opt</sub></em>. In this example, the name of the parameter is used in the place that has exceeded the scope of the function parameter scope introduced by P. However, the case is valid in any major implementation other than MSVC. The other bullets are irrelevant with this case. So, it seems the function parameter scope is underspecified for this case.</p>
<hr>
<p dir="auto">Issue 2:</p>
<div class="highlight highlight-source-c++ notranslate position-relative overflow-auto" dir="auto" data-snippet-clipboard-copy-content="auto(* ptr(double a))(int b)-&gt;decltype(a);
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       int b      )
         init-declarator-&gt; declarator-&gt; noptr-declarator parameters-and-qualifiers  trailing-return-type
                                         ^^^^^^^^^^^^^^^ 
                                         ( ptr-declarator )  
                                                  ↓
                                    (  ptr-operator ptr-declarator )
                                                      ↓
                                    (      *      noptr-declarator)   
                                                      ↓
                                                                   (  double a     )
                                    (      *     noptr-declarator parameters-and-qualifiers)
                                                      ↓
                                                                   (  double a     )
                                    (      *     declarator-id    parameters-and-qualifiers)
                                                  ^^^^^^^^^
                                                   ptr"><pre class="notranslate"><span class="pl-k">auto</span>(* <span class="pl-en">ptr</span>(<span class="pl-k">double</span> a))(<span class="pl-k">int</span> b)-&gt;decltype(a);
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^                  (       <span class="pl-k">int</span> b      )
         init-declarator-&gt; declarator-&gt; noptr-declarator parameters-<span class="pl-k">and</span>-qualifiers  trailing-<span class="pl-k">return</span>-type
                                         ^^^^^^^^^^^^^^^ 
                                         ( ptr-declarator )  
                                                  ↓
                                    (  ptr-<span class="pl-k">operator</span> ptr-declarator )
                                                      ↓
                                    (      *      noptr-declarator)   
                                                      ↓
                                                                   (  <span class="pl-k">double</span> a     )
                                    (      *     noptr-declarator parameters-<span class="pl-k">and</span>-qualifiers)
                                                      ↓
                                                                   (  <span class="pl-k">double</span> a     )
                                    (      *     declarator-id    parameters-<span class="pl-k">and</span>-qualifiers)
                                                  ^^^^^^^^^
                                                   ptr</pre></div>
<p dir="auto">First of all, this case is rejected by all major implementations. Assume the parameter-declaration-clause that comprises the parameter declaration <code class="notranslate">double a</code> is called P1, the other(comprises <code class="notranslate">int b</code>) is called P2. As shown in the Figure, P1 is associated with the declarator of the complete declaration and is preceded by <em>noptr-declarator of the form declarator-id attribute-specifier-seq <sub>opt</sub></em> that is <code class="notranslate">ptr</code>. In terms of the first bullet in the above, the scope should be extended to the nearest enclosing  <strong>init-declarator</strong> <code class="notranslate">(* ptr(double a))(int b)-&gt;decltype(a)</code> since the other cases(member-declarator...) are all not suitable here. Hence, the use of the identifier <code class="notranslate">a</code> within <code class="notranslate">decltype</code> should be valid. But this conclusion is denied by implementations.</p></div></div><div class="IssueBodyViewer-module__IssueBodyTaskList--xb3uu"><!--$--><div role="toolbar" aria-label="Reactions" class="d-flex gap-1 flex-wrap"></div><!--/$--></div></div></div></div></div></div></div><div data-testid="issue-viewer-comments-container" class="react-comments-container"><div class="IssueViewer-module__commentsContainer--H8wxg"><!--$!--><template></template><div class="issue-timeline-loading-module__delaySkeletonLoad--OE2Lq" data-testid="issue-timeline-loading"><div><div class="CommentLoading-module__CommentLoadingContainer--I9JkW"><div height="40px" width="40px" class="Box-sc-g0xbh4-0 LoadingSkeleton-sc-14d3f1fe-0 kqdiwS gALJmv"></div><div class="CommentLoading-module__CommentLoadingContentWrapper--Qd0Vg"><div class="CommentDivider-module__CommentDividerContainer--fCCZA"><div class="Box-sc-g0xbh4-0 HpFDd CommentDivider-module__CommentDividerLeftLine--TwR8y"></div><div class="Box-sc-g0xbh4-0 HpFDd 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      </button>
      <div class="octocat-spinner my-6 js-details-dialog-spinner"></div>
    </details-dialog>
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    <div class="Popover js-hovercard-content position-absolute" style="display: none; outline: none;">
  <div class="Popover-message Popover-message--bottom-left Popover-message--large Box color-shadow-large" style="width:360px;">
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    <template id="snippet-clipboard-copy-button">
  <div class="zeroclipboard-container position-absolute right-0 top-0">
    <clipboard-copy aria-label="Copy" class="ClipboardButton btn js-clipboard-copy m-2 p-0" data-copy-feedback="Copied!" data-tooltip-direction="w">
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    <path d="M0 6.75C0 5.784.784 5 1.75 5h1.5a.75.75 0 0 1 0 1.5h-1.5a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-1.5a.75.75 0 0 1 1.5 0v1.5A1.75 1.75 0 0 1 9.25 16h-7.5A1.75 1.75 0 0 1 0 14.25Z"></path><path d="M5 1.75C5 .784 5.784 0 6.75 0h7.5C15.216 0 16 .784 16 1.75v7.5A1.75 1.75 0 0 1 14.25 11h-7.5A1.75 1.75 0 0 1 5 9.25Zm1.75-.25a.25.25 0 0 0-.25.25v7.5c0 .138.112.25.25.25h7.5a.25.25 0 0 0 .25-.25v-7.5a.25.25 0 0 0-.25-.25Z"></path>
</svg>
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</svg>
    </clipboard-copy>
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</template>
<template id="snippet-clipboard-copy-button-unpositioned">
  <div class="zeroclipboard-container">
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</svg>
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</svg>
    </clipboard-copy>
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