Changes in version 0.1.18                        

  - add $get_values to CategoricalVariable
      - add $get_modulo_differences to IntegerVariable
      - add bitset_count_and for quick intersection counts

                       Changes in version 0.1.17                        

  - Add a copy_from method to the Bitset class.
      - Improve performance of bitset operations by making num_bits a
        compile-time constant expression.
      - Support vectors of logicals as an argument to filter_bitset.
      - Allow processes to be named, in order to produce more useful
        call stacks.

                       Changes in version 0.1.16                        

  - Allow events and variables to be added and removed when restoring
    the simulation.

                       Changes in version 0.1.15                        

  - Added an all.equal implementation for bitsets.

                       Changes in version 0.1.14                        

  - Added a flag to the Event constructor to tweak the restore
    semantics.
      - Replaced the Bitset R6 class with named lists, making them
        faster to instantiate.
      - Replaced the bitset sampling implementation with a faster
        algorithm.
      - Various other performance improvements, mostly avoiding copies
        of vectors.

                       Changes in version 0.1.13                        

  - Fixed the website generation.
      - Fix an uninitialized memory-read that could cause spurious event
        triggers.

                       Changes in version 0.1.12                        

  - Simulation state can be saved and restored, allowing the simulation
    to be resumed.

                       Changes in version 0.1.11                        

  - Optimised rendering memory usage and speed
      - Added benchmarks for rendering

                       Changes in version 0.1.10                        

  - Vector-based updates are consolidated into one place
      - Resizing memory bug fixed
      - Simplifed RaggedVariable instantiations to aliases until
        implementations are implemented

                 Changes in version 0.1.9 (2022-07-15)                  

  - All variables and targeted events are resizable
      - Ragged variables for integers and doubles

                        Changes in version 0.1.8                        

  - fix bug with C++ event listeners

                 Changes in version 0.1.7 (2021-10-25)                  

  - Check for bad bitset input when queueing updates to
    CategoricalVariable objects PR here
      - Add "bench" package to suggests and include benchmarking scripts
        of major functionality in tests/performance PR here
      - Update to latest version of "testthat" package so that C++ tests
        of IterableBitset object can be run without giving LTO check
        errors (see src/test-bitset.cpp)
      - Add CITATION file
      - Add method Bitset$clear to zero out all set bits in bitsets PR
        here
      - Fix bug (issue here) where DoubleVariable and IntegerVariable
        updates could change size of the variable object PR here

                 Changes in version 0.1.6 (2021-10-14)                  

  - Added a NEWS.md file to track changes to the package.
      - Add Mac OS files to .gitignore
      - Update pkgdown reference organization.
      - Update R-CMD-check workflow.
      - Event.h now defines class methods outside of the class
        definition for easier readability, and add documentation.
      - TargetedEvent$schedule now dispatches to different C++ functions
        in event.cpp and Event.h depending on if input index is a bitset
        or vector (previous behavior used bitset's $to_vector$ method in
        R to pass a vector).
      - test-event.R now only contains tests for Event class, new test
        file test-targetedevent.R contains a much updated suite of tests
        for the TargetedEvent class.
      - Fix bug where CategoricalVariable could be queued updates for
        indices in a vector that were outside the range of the
        population.
      - Update Bitset$not to operate in place. inplace = FALSE will be
        deprecated in 0.2.0
      - Rename the IterableBitset ~ operator to !

                        Changes in version 0.1.5                        

  - Added package logo.
      - Update DESCRIPTION and remove "reshape2" from suggested
        packages.
      - If given a Bitset for argument index, queue_update methods for
        IntegerVariable and DoubleVariable pass the bitset directly to
        the C++ functions integer_variable_queue_update_bitset and
        double_variable_queue_update_bitset rather than converting to
        vector and using vector methods.
      - CategoricalVariable.h, IntegerVariable.h, and DoubleVariable.h
        now define class methods outside of the class definition for
        easier readability, and add documentation.
      - CategoricalVariable, IntegerVariable, and DoubleVariable classes
        define a virtual destructor with default implementation.
      - get_index_of_set and get_size_of_set_vector methods for
        IntegerVariable now pass arguments by reference.
      - get_values method for IntegerVariable and DoubleVariable
        corrected to return value rather than reference.
      - add overload for get_values for IntegerVariable and
        DoubleVariable to accept std::vector<size_t> as argument rather
        than converting to bitset.
      - add function bitset_to_vector_internal to IterableBitset.h.
      - split testthat/test/test-variables.R into
        testthat/test/test-categoricalvariable.R,
        testthat/test/test-integervariable.R, and
        testthat/test/test-doublevariable.R
      - remove unnecessary #include statements from header files.
      - remove unnecessary comparisons for size_t types.