Version 2.0.0-alpha

This is the first pre-release for version 2. Version 2 is an overhaul of the library taking lessons learned.

Major changes:

• Replaced the previous ASSERT/VERIFY nomenclature with DEBUG_ASSERT and ASSERT
• Updated assertion macros to no longer return a value by default
  • Debug-only assertions no longer have to evaluate the assertion expression, and removed NO_ASSERT_RELEASE_EVAL
• Added DEBUG_ASSERT_VAL, ASSERT_VAL, and ASSUME_VAL variants that return values
• Added PANIC and UNREACHABLE
• Removed default throwing behavior for some assertion failures, all assertions now abort by default
• Removed non-fatal assertions
• Improved stringification generation to handle more types and better decide when there is useful information to print
• Added stringification customization point instead of relying on operator<<(std::ostream, const T&)
• Removed macro-based custom assertion failure handler system
• Added libassert::set_failure_handler
• Removed default safe signed-unsigned comparison behavior
• Added LIBASSERT_SAFE_COMPARISONS to opt into safe signed-unsigned comparisons
• Added color palette configuration
• Added configuration for literal formatting
• Reworked structures used to represent assertion information
  • Cleaned up binary_diagnostics_descriptor
  • Removed up extra_diagnostics struct trying to do too much
  • Renamed assertion_printer to assertion_info
  • Made more information available in the assertion_info struct
  • Removed lifetime funniness with the assertion_info struct
• Type prettifying
  • std::__cxx11:: is simplified to std::

Core changes:

• Cleaned up assertion macro expansion
• Cleaned up handling of literal formatting
• Cleaned up stringification generation
• Cleaned up assertion processing logic
• Removed the global lock used while processing assertions
• Lots of internal refactoring, cleanup, and changes to improve maintainability
• Overhauled CMake thanks to a contributor, fixing a lot of issues
• Removed need for user to manually specify ASSERT_STATIC if using the project with cmake and a static build
• Magic enum is now grabbed with FetchContent or externally from an existing install or package manager
• Reworked README.md
• Added CONTRIBUTING.md
• Resolved inconsistent use of ASSERT vs LIBASSERT for the library's macro prefix
• Fixed inconsistent use of assert vs libassert for referring to the library
• Updated the library's cmake target name to libassert::assert
• Updated the library's header to <libasssert/assert.hpp>
• Updated internal error handling to use cpptrace exceptions
• Added cmake integration testing on mingw to CI
• General CI improvements
• General testing improvements