| Type support (basic types, RTTI) |
| Library feature-test macros (C++20) |
| Program utilities |
| Variadic functions |
| initializer_list(C++11) |
| is_constant_evaluated(C++20) |
| is_within_lifetime(C++26) |
| source_location(C++20) |
| Coroutine support (C++20) |
| Contract support (C++26) |
| Three-way comparison |
| three_way_comparablethree_way_comparable_with(C++20)(C++20) |
| strong_ordering(C++20) |
| weak_ordering(C++20) |
| partial_ordering(C++20) |
| common_comparison_category(C++20) |
| compare_three_way_result(C++20) |
| compare_three_way(C++20) |
| strong_order(C++20) |
| weak_order(C++20) |
| partial_order(C++20) |
| compare_strong_order_fallback(C++20) |
| compare_weak_order_fallback(C++20) |
| compare_partial_order_fallback(C++20) |
| is_eqis_ltis_lteq(C++20)(C++20)(C++20) is_neqis_gtis_gteq(C++20)(C++20)(C++20) |
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