October 2025 - Boost - lists.boost.org

A string_view with null-terminator guarantee?
by Andrzej Krzemienski 07 Oct '25

07 Oct '25

Hi Everyone, Would Boost libraries benefit from having a string_view-like type with the guarantee that the underlying character sequence is null-terminated? This could be as yet another Boost library, or as part of Boost.Core. Maybe Boost already has such a type somewhere? The need for such a type surfaces time and again. When a library needs to be passed both const char * and std::string cheaply, only to pass it down to low-level C-libraries later. We have seen one recently during the review of Boost.Sqlite. One is again proposed for standardization: wg21.link/p3655. Regards, &rzej;

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Minimum CMake version raised to 3.8
by Alexander Grund 02 Oct '25

02 Oct '25

Hi maintainers, the Boost superproject build now requires CMake 3.8 or higher. The reason for this is that the CMake feature `cxx_std_11` to declare the C++11 requirement was introduced in that version and is now used by a large amount of libraries, directly or indirectly. This change [1] was made due to users being confused about which CMake versions are required/supported (e.g. [2]). A couple libraries failed to declare the CMake 3.8 requirement even though they were using `cxx_std_11` leading to error messages that were not easy to understand to someone not used to CMake. I opened PRs fixing the requirements in a couple of repositories which I discovered during testing with a range of different CMake versions. Raising the minimum version to 3.8 reduces the number of versions to be tested with a low enough cost given the actual requirement by the many individual libraries and availability of that version (3.8 is old enough that it should be easily available to users, current versions are 3.31 and 4.1.) Note that some features of the Superproject require even higher versions: - BoostTestJamfile requires 3.9 - Automatic installation requires 3.13 So users should be using at least CMake 3.13 anyway. Stay safe! Alex [1] https://github.com/boostorg/boost/pull/1088 [2] https://github.com/boostorg/boost/pull/1081

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[bloom] added bulk operations
by Joaquin M López Muñoz 01 Oct '25

01 Oct '25

For those interested in Boost.Bloom, I've just added bulk operations, which will make it into Boost 1.90: https://43.bloom.prtest3.cppalliance.org/libs/bloom/doc/html/index.html#tut… <https://43.bloom.prtest3.cppalliance.org/libs/bloom/doc/html/index.html#tut…> Joaquín M López Muñoz

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