Add clang-16 CI jobs, switch to clang-15 from stock Ubuntu repos.

diff --git a/.github/workflows b/.github/workflows
Andrey Semashev 6d02c36718 Add clang-16 CI jobs, switch to clang-15 from stock Ubuntu repos.		6 days ago
.github/workflows	Add clang-16 CI jobs, switch to clang-15 from stock Ubuntu repos.	6 days ago
doc	Fixed a link to library docs and silenced b2 warning about unescaped character.	2 years ago
example	Trim trailing spaces.	1 year ago
include/boost	Extracted is_iterator trait to a separate header.	3 weeks ago
meta	[skip ci] Add "cxxstd" json field. The "cxxstd" json field is being added to each Boost library's meta json information for libraries in order to specify the minumum C++ standard compilation level. The value of this field matches one of the values for 'cxxstd' in Boost.Build. The purpose of doing this is to provide information for the Boost website documentation for each library which will specify the minimum C++ standard compilation that an end-user must employ in order to use the particular library. This will aid end-users who want to know if they can successfully use a Boost library based on their C++ compiler's compilation level, without having to search the library's documentation to find this out.	2 years ago
test	Extracted is_iterator trait to a separate header.	3 weeks ago
.gitattributes	This commit was generated by cvs2svn to compensate for changes in r4,	23 years ago
CMakeLists.txt	Update CMakeLists.txt	2 years ago
README.md	Updated link to AppVeyor badge.	2 years ago
appveyor.yml	Added VS2022 job and C++20 and C++latest jobs to AppVeyor CI.	1 year ago
index.html	Removed executable flags from docs, tests and examples.	9 years ago