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### 1257. Header <ios> still contains a `concept_map`

Section: 31.5 [iostreams.base] Status: C++11 Submitter: Beman Dawes Opened: 2009-11-04 Last modified: 2016-01-28

Priority: Not Prioritized

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Discussion:

The current WP still contains a `concept_map`.

[ 2009-11-11 Moved to Tentatively Ready after 5 positive votes on c++std-lib. ]

Proposed resolution:

Change Iostreams base classes 31.5 [iostreams.base], Header <ios> synopsis, as indicated:

>     concept_map ErrorCodeEnum<io_errc> { };
>     template <> struct is_error_code_enum<io_errc> : true_type { }
>     error_code make_error_code(io_errc e);
>     error_condition make_error_condition(io_errc e);
>     const error_category& iostream_category();