2.2.0

• (!) feat: C++ modules support added by @JohelEGP
• (!) feat: New formatting specification implemented
• (!) feat: has_unit_symbol support removed
• (!) feat: ABI concerns resolved with introduction of u8 strings for symbols
• (!) feat: API-related Conan, CMake, and preprocessor options redesigned
• (!) feat: core.h removed
• (!) feat: from now on units, dimensions, quantity specifications, and point origins have to be marked as final
• feat: implicit point origins support added
• feat: unit default point origin support added
• feat: fma, isfinite, isinf, and isnan math function added by @NAThompson
• feat: fma for quantity points added
• feat: quantity_point support added for quantity_cast and value_cast
• feat: value_cast<Unit, Representation> added
• feat: value_cast<Quantity>(q), value_cast<Quantity>(qp) and value_cast<QuantityPoint>(qp) added by @burnpanck
• feat: interconvertible(QuantitySpec, QuantitySpec) added
• feat: qp.quantity_from_zero() added
• feat: value_type type trait added
• feat: do not print space between a number and percent or per_mille
• feat: ppm parts per million added by @nebkat
• feat: atan2 2-argument arctangent added by @nebkat
• feat: fmod floating-point division remainder added by @nebkat
• feat: remainder IEEE division remainder added by @nebkat
• feat: std::format support added
• feat: unit text output support added
• feat: formatting error messages improved
• feat: improve types readability by eliminating extraneous () in references, prefixes, and kind_of
• feat: dimension and unit text output added
• feat: some light and radiation ISQ quantities added
• feat: allow configuring GSL library use
• feat: freestanding support added
• (!) refactor: zero_Fahrenheit renamed to zeroth_degree_Fahrenheit
• (!) refactor: SI-related trigonometric functions moved to the si subnamespace
• (!) refactor: math.h header file broke up to smaller pieces
• (!) refactor: fixed_string interface refactored
• (!) refactor: ReferenceOf does not take a dimension anymore
• (!) refactor: 'o' replaced with '1' as a modifier for unit_symbol_solidus::one_denominator
• (!) refactor: get_kind() now returns kind_of
• (!) refactor: FMT macros moved to compat_macros.h
• (!) refactor: fixed_string refactored to reflect the latest changes to P3094R2
• (!) refactor: basic_symbol_text renamed to symbol_text
• (!) refactor: ratio hidden as an implementation detail behind mag_ratio
• (!) refactor: framework.h introduced
• (!) refactor: type list tools made an implementation detail of the library
• (!) refactor: header files with the entire system definitions moved up in the directory tree
• (!) refactor: absolute_point_origin does not use CRTP anymore
• refactor: system's units do not inherit from one another anymore
• refactor: all units made final
• refactor: math functions constraints refactored
• refactor: si_quantities.h added to improve compile-times
• refactor: validate_ascii_string refactored to is_basic_literal_character_set
• refactor: underlying_type split to wrapped_type and value_type and used in code
• refactor: code refactored to comply with clang-tidy
• refactor: remove dependency on <ranges> header and switch to use an iterator-based copy algorithm
• refactor: terminate replaced with abort and a header file added
• refactor: most std::remove_const_t removed and some replaced with the GCC-specific workaround
• refactor: not needed remove_reference_t and remove_cvref_t removed
• fix: QuantityLike conversions required Q::rep instead of using one provided by quantity_like_traits
• fix: QuantitySpec[Unit] replaced with make_reference in value_cast
• fix: ice_point is now defined with the integral offset from absolute_zero
• fix: performance regression in sudo_cast fixed
• fix: explicit object parameter support fixed
• fix: missing version header file added to hacks.h
• fix: quantity_cast to accept lvalue references (thanks @burnpanck)
• fix: value_cast with lvalue references to quantity_point (thanks @burnpanck)
• docs: project blog and first posts added
• docs: project documentation layout refactored
• docs: "Interoperability with Other Libraries" chapter added
• docs: "Framework Basics" chapters updated and cleaned up
• docs: smoot unit example added to the main page
• docs: "Code Example" chapter renamed to "Look and Feel" and reordered in TOC to be after "Quick Start"
• docs: "Quick Start" chapter reworked to be simpler and include quantity points
• docs: "Quantity points" chapter extended
• docs: "The Affine Space" chapter updated to reflect the recent design changes
• docs: "Working with Legacy interfaces" chapter added
• docs: "Text Output" chapter updated
• docs: mkdocs social plugin enabled
• docs: project logo and custom color scheme added
• docs: minimum compiler requirements updated
• docs: unit symbols admonition extended in the "Quick Start" chapter
• docs: Cairo dependency described in the MkDocs section
• docs: "hello units" example updated with dimensions output
• docs: "Text Output" chapter updated with the recent formatting changes
• docs: formatting grammar language changed to EBNF
• docs: "Project structure" chapter expanded
• docs: CITATION.cff updated
• (!) build: Conan and CMake options refactored
• (!) build: MP_UNITS_AS_SYSTEM_HEADERS renamed to MP_UNITS_BUILD_AS_SYSTEM_HEADERS
• (!) build: MP_UNITS_BUILD_LA and MP_UNITS_IWYU CMake options now have _DEV_ in the name
• build: gsl-lite updated to 0.41.0
• build: catch2 updated to 3.5.1
• build: fmt updated to 10.2.1
• build: gitpod environment updated
• build: check_cxx_feature_supported added
• build: IWYU path handling fixed
• build: IWYU enabled on GCC
• build: CMAKE_EXPORT_COMPILE_COMMANDS flag enabled for the developer's build
• build(conan): generate() now set cache_variables
• build(conan): can_run check added before running tests
• ci: Conan and CMake CI now use different cache names
• ci: gcc-14 added
• ci: clang-tidy CI added