From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: by sourceware.org (Postfix, from userid 2181) id D18223861032; Tue, 8 Dec 2020 13:05:50 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org D18223861032 To: gcc-cvs-wwwdocs@gcc.gnu.org Subject: gcc-wwwdocs branch master updated. 927e80dc01f505a625f1fcc4e1ca38aeb9f88e67 X-Git-Refname: refs/heads/master X-Git-Reftype: branch X-Git-Oldrev: 7c56c86ebe102849ec239f0c57e93988169d90f4 X-Git-Newrev: 927e80dc01f505a625f1fcc4e1ca38aeb9f88e67 Message-Id: <20201208130550.D18223861032@sourceware.org> Date: Tue, 8 Dec 2020 13:05:50 +0000 (GMT) From: Jonathan Wakely X-BeenThere: gcc-cvs-wwwdocs@gcc.gnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gcc-cvs-wwwdocs mailing list List-Unsubscribe: , List-Archive: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 08 Dec 2020 13:05:50 -0000 This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "gcc-wwwdocs". The branch, master has been updated via 927e80dc01f505a625f1fcc4e1ca38aeb9f88e67 (commit) from 7c56c86ebe102849ec239f0c57e93988169d90f4 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 927e80dc01f505a625f1fcc4e1ca38aeb9f88e67 Author: Jonathan Wakely Date: Tue Dec 8 13:05:42 2020 +0000 Document libstdc++ changes in GCC 11 Also add porting-to notes about tr1::bind. diff --git a/htdocs/gcc-11/changes.html b/htdocs/gcc-11/changes.html index 4d3efed5..50e35505 100644 --- a/htdocs/gcc-11/changes.html +++ b/htdocs/gcc-11/changes.html @@ -239,7 +239,28 @@ a work-in-progress.

- +

Runtime Library (libstdc++)

+
    +
  • Improved C++17 support, including: +
      +
    • std::from_chars for floating-point types. +
        + +
      • Improved experimental C++2a support, including: +
          +
        • Calendar additions to <chrono>.
          • +
        • std::bit_cast
          • +
        • std::source_location
          • +
        • Atomic wait and notify operations.
          • +
        • <latch> and <semaphore>
          • +
        • <syncstream>
          • +
        • Efficient access to basic_stringbuf's buffer.
          • +
        +
        • +
      • Faster std::uniform_int_distribution, + thanks to Daniel Lemire. +
        • +

      Fortran

      diff --git a/htdocs/gcc-11/porting_to.html b/htdocs/gcc-11/porting_to.html index 41efc3b6..4187dd8e 100644 --- a/htdocs/gcc-11/porting_to.html +++ b/htdocs/gcc-11/porting_to.html @@ -114,6 +114,33 @@ be included explicitly when compiled with GCC 11:
    +

    Old iostream Members

    +

    +The deprecated iostream members ios_base::io_state, +ios_base::open_mode, ios_base::seek_dir, and +basic_streambuf::stossc are not available in C++17 mode. +References to those members should be replaced by std::iostate, +std::openmode, std::seekdir, and +basic_streambuf::sbumpc respectively. +

    + +

    Call of overloaded 'bind(...)' is ambiguous

    +

    +The placeholders for std::tr1::bind have been changed to use +the same placeholder objects as std::bind. This means that +following using std::tr1::bind; an unqualified call to +bind(f, std::tr1::placeholders::_1) may be ambiguous. +This happens because std::tr1::bind is brought into scope by +the using-declaration and std::bind is found by +Argument-Dependent Lookup due to the type of the _1 placeholder. +

    +

    +To resolve this ambiguity replace unqualified calls to bind +with std::tr1::bind or std::bind. Alternatively, +change the code to not include the <tr1/functional> header, +so that only std::bind is declared. +

    + ----------------------------------------------------------------------- Summary of changes: htdocs/gcc-11/changes.html | 23 ++++++++++++++++++++++- htdocs/gcc-11/porting_to.html | 27 +++++++++++++++++++++++++++ 2 files changed, 49 insertions(+), 1 deletion(-) hooks/post-receive -- gcc-wwwdocs