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3107. istreambuf_iterator has public exposition-only member

Section: 23.6.4 [istreambuf.iterator] Status: New Submitter: Billy O'Neal III Opened: 2018-04-26 Last modified: 2020-09-06

Priority: 4

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Discussion:

LWG has said recently that we don't want public exposition-only things, as that may encourage users to try to use those names (and some implementers to actually use those names).

[2018-06-18 after reflector discussion]

Priority set to 4

Proposed resolution:

This wording is relative to N4741.

  1. Edit 23.6.4 [istreambuf.iterator] as indicated:

    namespace std {
      template<class charT, class traits = char_traits<charT>>
      class istreambuf_iterator {
      public:
        […]
        using istream_type = basic_istream<charT,traits>;
      
        class proxy; // exposition only
      
        constexpr istreambuf_iterator() noexcept;
        […]
      private:
        class proxy; // exposition only
        streambuf_type* sbuf_; // exposition only
      };
      […]
    }