* Make the library modular usable.
* Switch to library requirements instead of source. As source puts extra source in install targets.
* Remove not-needed reference to Conversion dependency.
* Add missing b2 testing module import.
* Add requires-b2 check to top-level build file.
* Bump B2 require to 5.2
* Change all <source> references to <library>.
* Update copyright dates.
* Move inter-lib dependencies to a project variable and into the build targets.
* Update build deps.
Performance improvement: Add move semantics to by-value parameters (iterator and predicate), to eliminate the cost of copy-construction. Both the Predicate (Normally a std::function, or lambda), and custom iterators can have state, which can be expensive to copy. Profiler identified this as a bottleneck while using boost::adaptors::filtered.
The MPL version is slower to compile and `BOOST_STATIC_ASSERT` is
already used in some places. So unify that.
This also fixes `Wzero-as-null-pointer-constant` warnings, see https://github.com/boostorg/mpl/pull/75
The recent commit 5777e9944b broke code such as
(*it++).foo(), where the result of dereferencing would be convertible to
the value type but did not provide the members of the value type. To mitigate
this, return a reference to the value instead of a proxy object. This will only
work for non-writable iterators (and it didn't work for writable iterators
before either) because in that case a proxy is needed to be able to intercept
operator=.
Also fix a similar issue with (it++)->foo() by adding operator-> overloads
to the post-increment result proxies.
Added tests for the fixes.
This allows expressions such as `Iterator it2(it1++)` to compile.
Additionally separated operations that are allowed on the result of
dereferencing the proxy to a separate set of proxies to make the allowed
set of expressions more strict and unambiguous. In particular, it means
`it++` cannot be converted to value type and `*it++` cannot be converted
to the iterator type anymore. Also, make sure `*it1++ = *it2++` works
as expexted by explicitly converting the proxy to the value type on
assignment.
Fixes https://github.com/boostorg/iterator/issues/75.
This fixes incorrect final iterator type being used in iterator_facade, which
results in an internal base class being returned from various facade methods.
Reported in https://github.com/boostorg/iterator/issues/75.
- Added gcc-12 and clang-13 through 15 jobs.
- Added C++23 testing for gcc and clang on Linux.
- Updated clang version for UBSAN job.
- Updated Ubuntu version for clang jobs to avoid having to use external APT
repository.
- Updated python package installation for compatibility with Ubuntu 22.04.
