What is C++23?
In February of 2023, the ISO (International Organization for Standardization) approved a new version of C++, called C++23.
New improvements in C++23
For your interest, here’s a list of the major changes that C++23 adds. Note that this list is not comprehensive, but rather intended to highlight some of the key changes of interest.
- Constexpr <cmath> (e.g.
std::abs()), and <cstdlib> (6.7 -- Relational operators and floating point comparisons).
- Constexpr
std::unique_ptr (no lesson yet).
- Explicit
this parameter (no lesson yet).
- Fixed-size floating point types (via <stdfloat>) (no lesson yet).
- Formatted printing functions
std::print and std::println (no lesson yet)
- Literal suffixes for
std::size_t and the corresponding signed type (5.2 -- Literals).
- Multidimensional subscript
operator[] (Mentioned in lesson 17.13 -- Multidimensional std::array).
- Multidimensional span
std::mdspan (17.13 -- Multidimensional std::array).
- Preprocessor directives
#elifdef and #elifndef (no lesson yet).
- Preprocessor directive
#warning (no lesson yet).
- Stacktrace library (no lesson yet)
- Standard library modules
std (and std.compat) (no lesson yet).
- Static
operator() and operator[] (no lesson yet).
std::bitset now fully constexpr.
std::expected (no lesson yet)
std::ranges algorithms starts_with, ends_with, contains (no lesson yet)
std::string::contains and std::string_view::contains (no lesson yet)
std::to_underlying to get the underlying type of enum (13.6 -- Scoped enumerations (enum classes)).
std::unreachable() (no lesson yet).
- Using unknown pointers and references in constant expressions (17.2 -- std::array length and indexing).
B.5 — Introduction to C++23
What is C++23?
In February of 2023, the ISO (International Organization for Standardization) approved a new version of C++, called C++23.
New improvements in C++23
For your interest, here’s a list of the major changes that C++23 adds. Note that this list is not comprehensive, but rather intended to highlight some of the key changes of interest.
std::abs()), and <cstdlib> (6.7 -- Relational operators and floating point comparisons).std::unique_ptr(no lesson yet).thisparameter (no lesson yet).std::printandstd::println(no lesson yet)std::size_tand the corresponding signed type (5.2 -- Literals).operator[](Mentioned in lesson 17.13 -- Multidimensional std::array).std::mdspan(17.13 -- Multidimensional std::array).#elifdefand#elifndef(no lesson yet).#warning(no lesson yet).std(andstd.compat) (no lesson yet).operator()andoperator[](no lesson yet).std::bitsetnow fully constexpr.std::expected(no lesson yet)std::rangesalgorithmsstarts_with,ends_with,contains(no lesson yet)std::string::containsandstd::string_view::contains(no lesson yet)std::to_underlyingto get the underlying type of enum (13.6 -- Scoped enumerations (enum classes)).std::unreachable()(no lesson yet).