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News for Package RcppCCTZ

No longer set compilation standard as recent R version set a sufficiently high minimum
Qualify a call to cctz::format (Michael Quinn in #44)
Routine updates to continuous integration and badges
Switch to Authors@R in DESCRIPTION

Switch CI use to r-ci
Applied patch by Tomas Kalibera for Windows UCRT under the upcoming R 4.2.0 expected for April.

Added three new nothrow variants (needed for win32) needed by the expanded nanotime package (Leonardo in #37)

Added functions _RcppCCTZ_convertToCivilSecond that converts a time point to the number of seconds since epoch, and _RcppCCTZ_convertToTimePoint that converts a number of seconds since epoch into a time point; these functions are only callable from C level (Leonardo in #34 and #35).
Added function _RcppCCTZ_getOffset that returns the offset at a speficied time-point for a specified timezone; this function is only callable from C level (Leonardo in #32).

Synchronized with upstream CCTZ release 2.3 plus commits accrued since then (Dirk in #30).
The package now uses tinytest for unit tests (Dirk in #31).

Parsing to Datetime was corrected on systems that do not have nanosecond support in C++11 chrono (#28).
DatetimeVector objects are now created with their timezone attribute when available.
The toTz functions is now vectorized (#29).
More unit tests were added, and some conditioning on Solaris (mostly due to missing timezone info) was removed.

An unused main() in src/time_tool.cc was #ifdef'ed away to please another compiler/OS combination.
The tzDiff function now supports a vector argument (#24).
An unnecessary #include was removed (#25).
Some tests are not conditioning on Solaris to not fail there (#26).
The CCTZ code was updated to the newest upstream version (#27).
Unit tests now use the RUnit package replacing a simpler tests script.

On Windows, the TZDIR environment variable is now set in .onLoad()
Replaced init.c with registration code inside of RcppExports.cpp thanks to Rcpp 0.12.11.

Synchronized with upstream CCTZ
The time_point object is instantiated explicitly for nanosecond use which appears to be required on macOS

Conversion from timepoint to two double values now rounds correctly (#14 closing #12, with thanks to Leonardo)
The Description was expanded to stress the need for a modern C++11 compiler; g++-4.8 (as on 'trusty' eg in Travis CI) works
Travis CI is now driven via run.sh from our fork

Windows compilation was enabled by defining OFFSET() and ABBR() for MinGW (#10 partially addressing #9)
Windows use completed with backport of std::get_time from LLVM's libc++ to enable strptime semantics (Dan Dillon in #11 completing #9)
Timezone information on Windows is supplied via R's own copy of zoneinfo with TZDIR set (also #10)
The interface to formatDouble was cleaned up

Synchronized with CCTZ upstream.
New parsing and formating helpers for Datetime vectors
New parsing and formating helpers for (two) double vectors representing full std::chrono nanosecond resolutions
Updated documentation and examples.

New utility example functions toTz() and tzDiff
Synchronized with small upstream change for additional #ifdef for compiler differentiation

Additional #ifdef statements suggested by Bradley White in CCTZ ticket #5 permitting compilation on Solaris – with thanks to Jeroen for testing our branch.