[jira] Commented: (STDCXX-979) __rw_is_scalar or is_scalar need to take std::nullptr_t into account

["Martin Sebor (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/STDCXX-979?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12614633#action_12614633 ] 

Martin Sebor commented on STDCXX-979:
-------------------------------------

The solution should be straightforward: add a config test for {{nullptr_t}} and conditionally implement {{is_scalar<std::nullptr_t>}} when the test detects support for the type.

> __rw_is_scalar or is_scalar need to take std::nullptr_t into account
> --------------------------------------------------------------------
>
>                 Key: STDCXX-979
>                 URL: https://issues.apache.org/jira/browse/STDCXX-979
>             Project: C++ Standard Library
>          Issue Type: Bug
>          Components: TR1.4 - Metaprogramming and Type Traits
>    Affects Versions: 4.3.x
>            Reporter: Travis Vitek
>            Assignee: Travis Vitek
>             Fix For: 4.3.x
>
>   Original Estimate: 1h
>  Remaining Estimate: 1h
>
> The standard requires that {{std::is_scalar<std::nullptr_t>::value}} evaluate to true. The current implementation doesn't consider the {{std::nullptr_t}} type because it is not implemented yet.

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