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1 新的语言特性https://zh.cppreference.com/cpp/20#新的语言特性
2 新的库特性https://zh.cppreference.com/cpp/20#新的库特性
2.1 新的头文件https://zh.cppreference.com/cpp/20#新的头文件
2.2 库特性https://zh.cppreference.com/cpp/20#库特性
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4 编译器支持情况https://zh.cppreference.com/cpp/20#编译器支持情况
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4.2 C++20 库功能特性https://zh.cppreference.com/cpp/20#C++20_库功能特性
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C++ 编译器支持https://zh.cppreference.com/cpp/compiler_support#C++20_功能特性
lambda 捕获https://zh.cppreference.com/cpp/language/lambda#lambda_捕获
P0409R2https://wg21.link/P0409R2
__VA_OPT__https://zh.cppreference.com/cpp/preprocessor/replace#函数式宏
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P1042R1https://wg21.link/P1042R1
指派初始化器https://zh.cppreference.com/cpp/language/aggregate_initialization#指派初始化器
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_designated_initializers
P0329R4https://wg21.link/P0329R4
泛型 lambda 的模板形参列表https://zh.cppreference.com/cpp/language/lambda#语法
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_generic_lambdas
P0428R2https://wg21.link/P0428R2
位域的默认成员初始化器https://zh.cppreference.com/cpp/language/bit_field#Cpp20_位域的默认成员初始化器
P0683R1https://wg21.link/P0683R1
P0702R1https://wg21.link/P0702R1
P0704R1https://wg21.link/P0704R1
概念https://zh.cppreference.com/cpp/language/constraints
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_concepts
P0734R0https://wg21.link/P0734R0
不求值语境中的 lambdahttps://zh.cppreference.com/cpp/language/lambda#不求值语境中的_lambda
P0315R4https://wg21.link/P0315R4
三路比较https://zh.cppreference.com/cpp/language/operator_comparison#三路比较
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_impl_three_way_comparison
P0515R3https://wg21.link/P0515R3
P0588R1https://wg21.link/P0588R1
基于范围的 for 的初始化语句https://zh.cppreference.com/cpp/language/range-for#语法
P0614R1https://wg21.link/P0614R1
lambdahttps://zh.cppreference.com/cpp/language/lambda
P0624R2https://wg21.link/P0624R2
P0641R2https://wg21.link/P0641R2
P0692R1https://wg21.link/P0692R1
P0846R0https://wg21.link/P0846R0
常量求值所需要https://zh.cppreference.com/cpp/language/constant_expression#常量求值所需要的函数与变量
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_constexpr_in_decltype
P0859R0https://wg21.link/P0859R0
likelyhttps://zh.cppreference.com/cpp/language/attributes/likely
unlikelyhttps://zh.cppreference.com/cpp/language/attributes/likely
P0479R5https://wg21.link/P0479R5
typenamehttps://zh.cppreference.com/cpp/keywords/typename
P0634R3https://wg21.link/P0634R3
lambda 初始化捕获https://zh.cppreference.com/cpp/language/lambda#lambda_捕获
包展开https://zh.cppreference.com/cpp/language/parameter_pack
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_init_captures
P0780R2https://wg21.link/P0780R2
no_unique_addresshttps://zh.cppreference.com/cpp/language/attributes/no_unique_address
P0840R2https://wg21.link/P0840R2
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_concepts
P0848R3https://wg21.link/P0848R3
结构化绑定https://zh.cppreference.com/cpp/language/structured_binding
P0961R1https://wg21.link/P0961R1
范围 for 循环https://zh.cppreference.com/cpp/language/range-for
P0962R1https://wg21.link/P0962R1
P0969R0https://wg21.link/P0969R0
销毁的 operator deletehttps://zh.cppreference.com/cpp/memory/new/operator_delete
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_impl_destroying_delete
P0722R3https://wg21.link/P0722R3
非类型模板形参https://zh.cppreference.com/cpp/language/template_parameters#非类型模板形参
P0732R2https://wg21.link/P0732R2
捕获https://zh.cppreference.com/cpp/language/lambda#Lambda_捕获
P0806R2https://wg21.link/P0806R2
explicit(bool)https://zh.cppreference.com/cpp/language/explicit
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_conditional_explicit
P0892R2https://wg21.link/P0892R2
功能特性测试宏https://zh.cppreference.com/cpp/feature_test
P0941R2https://wg21.link/P0941R2
P1008R1https://wg21.link/P1008R1
虚函数https://zh.cppreference.com/cpp/language/virtual
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_constexpr
P1064R0https://wg21.link/P1064R0
P1120R0https://wg21.link/P1120R0
char8_thttps://zh.cppreference.com/cpp/language/types#char8_t
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_char8_t
P0482R6https://wg21.link/P0482R6
std::is_constant_evaluated()https://zh.cppreference.com/cpp/types/is_constant_evaluated
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_is_constant_evaluated
P0595R2https://wg21.link/P0595R2
P1002R1https://wg21.link/P1002R1
立即函数https://zh.cppreference.com/cpp/language/consteval
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_consteval
P1073R3https://wg21.link/P1073R3
嵌套内联命名空间https://zh.cppreference.com/cpp/language/namespace
P1094R2https://wg21.link/P1094R2
有约束https://zh.cppreference.com/cpp/language/template_parameters#类型模板实参
声明https://zh.cppreference.com/cpp/language/auto
P1141R2https://wg21.link/P1141R2
P1236R1https://wg21.link/P1236R1
常量表达式https://zh.cppreference.com/cpp/language/constant_expression
dynamic_casthttps://zh.cppreference.com/cpp/language/dynamic_cast
typeidhttps://zh.cppreference.com/cpp/language/typeid
P1327R1https://wg21.link/P1327R1
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_constexpr
P1330R0https://wg21.link/P1330R0
协程https://zh.cppreference.com/cpp/language/coroutines
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_impl_coroutine
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_coroutine
P0912R5https://wg21.link/P0912R5
LWG3393https://wg21.link/LWG3393
聚合体初始化https://zh.cppreference.com/cpp/language/aggregate_initialization
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_aggregate_paren_init
P0960R3https://wg21.link/P0960R3
new 表达式https://zh.cppreference.com/cpp/language/new
P1009R2https://wg21.link/P1009R2
模块https://zh.cppreference.com/cpp/language/modules
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_modules
P1103R3https://wg21.link/P1103R3
P1041R4https://wg21.link/P1041R4
P1139R2https://wg21.link/P1139R2
P1185R2https://wg21.link/P1185R2
P1286R2https://wg21.link/P1286R2
P1091R3https://wg21.link/P1091R3
P1381R1https://wg21.link/P1381R1
P0388R4https://wg21.link/P0388R4
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_constexpr_dynamic_alloc
P0784R7https://wg21.link/P0784R7
volatilehttps://zh.cppreference.com/cpp/language/cv#注解
P1152R4https://wg21.link/P1152R4
constinithttps://zh.cppreference.com/cpp/language/constinit
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_constinit
P1143R2https://wg21.link/P1143R2
弃用下标中的逗号运算符https://zh.cppreference.com/cpp/language/operator_other#内建的逗号运算符
P1161R3https://wg21.link/P1161R3
nodiscardhttps://zh.cppreference.com/cpp/language/attributes/nodiscard
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P1331R2https://wg21.link/P1331R2
P1668R1https://wg21.link/P1668R1
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_using_enum
P1099R5https://wg21.link/P1099R5
三路比较https://zh.cppreference.com/cpp/language/operator_comparison#三路比较
P1186R3https://wg21.link/P1186R3
nodiscardhttps://zh.cppreference.com/cpp/language/attributes/nodiscard
P1771R1https://wg21.link/P1771R1
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_deduction_guides
P1814R0https://wg21.link/P1814R0
类模板实参推导https://zh.cppreference.com/cpp/language/class_template_argument_deduction
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_deduction_guides
P1816R0https://wg21.link/P1816R0
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隐式移动https://zh.cppreference.com/cpp/language/return
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P1946R0https://wg21.link/P1946R0
P1959R0https://wg21.link/P1959R0
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_nontype_template_args
P1907R1https://wg21.link/P1907R1
P0593R6https://wg21.link/P0593R6
P1957R2https://wg21.link/P1957R2
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_endian
P0463R1https://wg21.link/P0463R1
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_shared_ptr_arrays
P0674R1https://wg21.link/P0674R1
原子浮点数类型https://zh.cppreference.com/cpp/atomic/atomic#对浮点数类型的特化
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_float
P0020R6https://wg21.link/P0020R6
同步缓冲https://zh.cppreference.com/cpp/io/basic_syncbuf
std::basic_osyncstreamhttps://zh.cppreference.com/cpp/io/basic_osyncstream
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_syncbuf
P0053R7https://wg21.link/P0053R7
https://zh.cppreference.com/cpp/header/algorithm
https://zh.cppreference.com/cpp/header/utility
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_algorithms
P0202R3https://wg21.link/P0202R3
https://zh.cppreference.com/cpp/header/complex
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_complex
P0415R1https://wg21.link/P0415R1
P0439R0https://wg21.link/P0439R0
字符串https://zh.cppreference.com/cpp/string/basic_string
前缀https://zh.cppreference.com/cpp/string/basic_string/starts_with
后缀https://zh.cppreference.com/cpp/string/basic_string/ends_with
stringhttps://zh.cppreference.com/cpp/string/basic_string/starts_with
(_view)https://zh.cppreference.com/cpp/string/basic_string_view/starts_with
::starts_withhttps://zh.cppreference.com/cpp/string/basic_string/starts_with
ends_withhttps://zh.cppreference.com/cpp/string/basic_string_view/ends_with
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_starts_ends_with
P0457R2https://wg21.link/P0457R2
operator<=>https://zh.cppreference.com/cpp/language/operator_comparison#三路比较
https://zh.cppreference.com/cpp/header/compare
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_three_way_comparison
P0768R1https://wg21.link/P0768R1
std::remove_cvrefhttps://zh.cppreference.com/cpp/types/remove_cvref
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_remove_cvref
P0550R2https://wg21.link/P0550R2
标准库https://zh.cppreference.com/cpp/language/attributes/nodiscard#标准库
nodiscardhttps://zh.cppreference.com/cpp/language/attributes/nodiscard
P0600R1https://wg21.link/P0600R1
数值算法https://zh.cppreference.com/cpp/algorithm#数值运算
std::movehttps://zh.cppreference.com/cpp/utility/move
P0616R0https://wg21.link/P0616R0
工具https://zh.cppreference.com/cpp/memory/to_address
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_to_address
P0653R2https://wg21.link/P0653R2
std::shared_ptrhttps://zh.cppreference.com/cpp/memory/shared_ptr/atomic2
std::weak_ptrhttps://zh.cppreference.com/cpp/memory/weak_ptr/atomic2
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_shared_ptr
P0718R2https://wg21.link/P0718R2
std::spanhttps://zh.cppreference.com/cpp/container/span
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_span
P0122R7https://wg21.link/P0122R7
日历https://zh.cppreference.com/cpp/chrono#日历
时区https://zh.cppreference.com/cpp/chrono#时区
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_chrono
P0355R7https://wg21.link/P0355R7
部分https://libcxx.llvm.org/Status/Cxx20.html#note-p0355
https://zh.cppreference.com/cpp/header/version
P0754R2https://wg21.link/P0754R2
P0809R0https://wg21.link/P0809R0
常量表达式迭代器 (ConstexprIterator) https://zh.cppreference.com/cpp/named_req/ConstexprIterator
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_string_view
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_array_constexpr
P0858R0https://wg21.link/P0858R0
P0966R1https://wg21.link/P0966R1
原子比较交换https://zh.cppreference.com/cpp/atomic/atomic/compare_exchange
P0528R3https://wg21.link/P0528R3
std::atomic_refhttps://zh.cppreference.com/cpp/atomic/atomic_ref
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_ref
P0019R8https://wg21.link/P0019R8
std::map::contains()https://zh.cppreference.com/cpp/container/map/contains
P0458R2https://wg21.link/P0458R2
逐片构造https://zh.cppreference.com/cpp/memory/scoped_allocator_adaptor/construct
P0475R1https://wg21.link/P0475R1
std::bit_cast()https://zh.cppreference.com/cpp/numeric/bit_cast
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_bit_cast
P0476R2https://wg21.link/P0476R2
2 的整数次幂运算https://zh.cppreference.com/cpp/utility/bit
std::bit_ceil()https://zh.cppreference.com/cpp/numeric/bit_ceil
std::bit_floor()https://zh.cppreference.com/cpp/numeric/bit_floor
std::bit_width()https://zh.cppreference.com/cpp/numeric/bit_width
std::has_single_bit()https://zh.cppreference.com/cpp/numeric/has_single_bit
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_int_pow2
P0556R3https://wg21.link/P0556R3
P1956R1https://wg21.link/P1956R1
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_list_remove_return_type
P0646R1https://wg21.link/P0646R1
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_destroying_delete
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_is_nothrow_convertible
P0758R1https://wg21.link/P0758R1
std::shift_left/righthttps://zh.cppreference.com/cpp/algorithm/shift
https://zh.cppreference.com/cpp/header/algorithm
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_shift
P0769R2https://wg21.link/P0769R2
P0879R0https://wg21.link/P0879R0
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_type_identity
P0887R1https://wg21.link/P0887R1
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比较运算符https://zh.cppreference.com/cpp/container/array/operator_cmp
P1023R0https://wg21.link/P1023R0
std::unwrap_ref_decay 与 std::unwrap_referencehttps://zh.cppreference.com/cpp/utility/functional/unwrap_reference
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_unwrap_ref
P0318R1https://wg21.link/P0318R1
std::bind_front()https://zh.cppreference.com/cpp/utility/functional/bind_front
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_bind_front
P0356R5https://wg21.link/P0356R5
P0357R3https://wg21.link/P0357R3
operator>>(basic_istream&, CharT*)https://zh.cppreference.com/cpp/io/basic_istream/operator_gtgt2
P0487R1https://wg21.link/P0487R1
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FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_char8_t
P0482R6https://wg21.link/P0482R6
使用分配器https://zh.cppreference.com/cpp/memory/make_obj_using_allocator
构造https://zh.cppreference.com/cpp/memory/uninitialized_construct_using_allocator
工具函数https://zh.cppreference.com/cpp/memory/uses_allocator_construction_args
P0591R4https://wg21.link/P0591R4
P0602R4https://wg21.link/P0602R4
P0608R3https://wg21.link/P0608R3
noexcepthttps://zh.cppreference.com/cpp/language/noexcept
P0771R1https://wg21.link/P0771R1
唯一https://zh.cppreference.com/cpp/iterator
范围https://zh.cppreference.com/cpp/ranges
提案https://zh.cppreference.com/cpp/algorithm/ranges
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_ranges
P0896R4https://wg21.link/P0896R4
无序关联容器https://zh.cppreference.com/cpp/container#无序关联容器
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_generic_unordered_lookup
P0919R3https://wg21.link/P0919R3
P1690R1https://wg21.link/P1690R1
https://zh.cppreference.com/cpp/header/chrono
noexcepthttps://zh.cppreference.com/cpp/language/noexcept
P0972R0https://wg21.link/P0972R0
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_memory
P1006R1https://wg21.link/P1006R1
std::assume_aligned()https://zh.cppreference.com/cpp/memory/assume_aligned
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_assume_aligned
P1007R3https://wg21.link/P1007R3
make_unique_for_overwritehttps://zh.cppreference.com/cpp/memory/unique_ptr/make_unique
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_smart_ptr_for_overwrite
P1020R1https://wg21.link/P1020R1
P1973R1https://wg21.link/P1973R1
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_array_constexpr
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_functional
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_iterator
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_tuple
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_utility
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_string_view
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P1165R1https://wg21.link/P1165R1
std::erase(std::vector)https://zh.cppreference.com/cpp/container/vector/erase2
std::erase_if(std::map)https://zh.cppreference.com/cpp/container/map/erase_if
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_erase_if
P1209R0https://wg21.link/P1209R0
P1115R3https://wg21.link/P1115R3
P1502R1https://wg21.link/P1502R1
polymorphic_allocator<>https://zh.cppreference.com/cpp/memory/polymorphic_allocator
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_polymorphic_allocator
P0339R6https://wg21.link/P0339R6
std::execution::unseqhttps://zh.cppreference.com/cpp/algorithm/execution_policy_tag
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_execution
P1001R2https://wg21.link/P1001R2
std::lerp()https://zh.cppreference.com/cpp/numeric/lerp
std::midpoint()https://zh.cppreference.com/cpp/numeric/midpoint
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_interpolate
P0811R3https://wg21.link/P0811R3
std::spanhttps://zh.cppreference.com/cpp/container/span
P1024R3https://wg21.link/P1024R3
std::create_directory()https://zh.cppreference.com/cpp/filesystem/create_directory
P1164R1https://wg21.link/P1164R1
std::ssize()https://zh.cppreference.com/cpp/iterator/size
std::spanhttps://zh.cppreference.com/cpp/container/span
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_ssize
P1227R2https://wg21.link/P1227R2
有界https://zh.cppreference.com/cpp/types/is_bounded_array
无界https://zh.cppreference.com/cpp/types/is_unbounded_array
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_bounded_array_traits
P1357R1https://wg21.link/P1357R1
std::to_array()https://zh.cppreference.com/cpp/container/array/to_array
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_to_array
P0325R4https://wg21.link/P0325R4
P0408R7https://wg21.link/P0408R7
布局https://zh.cppreference.com/cpp/types/is_layout_compatible
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指针https://zh.cppreference.com/cpp/types/is_pointer_interconvertible_base_of
可互转换性https://zh.cppreference.com/cpp/types/is_pointer_interconvertible_with_class
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_is_layout_compatible
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_is_pointer_interconvertible
P0466R5https://wg21.link/P0466R5
位操作https://zh.cppreference.com/cpp/utility/bit
rotl()https://zh.cppreference.com/cpp/numeric/rotl
rotr()https://zh.cppreference.com/cpp/numeric/rotr
countl_zero()https://zh.cppreference.com/cpp/numeric/countl_zero
countl_one()https://zh.cppreference.com/cpp/numeric/countl_one
countr_zero()https://zh.cppreference.com/cpp/numeric/countr_zero
countr_one()https://zh.cppreference.com/cpp/numeric/countr_one
popcount()https://zh.cppreference.com/cpp/numeric/popcount
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_bitops
P0553R4https://wg21.link/P0553R4
数学常数https://zh.cppreference.com/cpp/numeric/constants
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_math_constants
P0631R8https://wg21.link/P0631R8
文本格式化https://zh.cppreference.com/cpp/utility/format
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_format
P0645R10https://wg21.link/P0645R10
std::stop_tokenhttps://zh.cppreference.com/cpp/thread/stop_token
std::jthreadhttps://zh.cppreference.com/cpp/thread/jthread
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_jthread
P0660R10https://wg21.link/P0660R10
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_dynamic_alloc
P0784R7https://wg21.link/P0784R7
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_string
P0426R1https://wg21.link/P0426R1
P1032R1https://wg21.link/P1032R1
P0980R1https://wg21.link/P0980R1
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_vector
P1004R2https://wg21.link/P1004R2
范围适配器https://zh.cppreference.com/cpp/ranges
P1035R7https://wg21.link/P1035R7
P1065R2https://wg21.link/P1065R2
std::counting_semaphorehttps://zh.cppreference.com/cpp/thread/counting_semaphore
std::latchhttps://zh.cppreference.com/cpp/thread/latch
std::barrierhttps://zh.cppreference.com/cpp/thread/barrier
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_flag_test
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_lock_free_type_aliases
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_wait
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_barrier
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_latch
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_semaphore
P1135R6https://wg21.link/P1135R6
std::source_locationhttps://zh.cppreference.com/cpp/utility/source_location
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_source_location
P1208R6https://wg21.link/P1208R6
<=>https://zh.cppreference.com/cpp/language/operator_comparison#三路比较
P1614R2https://wg21.link/P1614R2
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_atomic_value_initialization
P0883R2https://wg21.link/P0883R2
数值算法https://zh.cppreference.com/cpp/numeric#数值运算
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_constexpr_numeric
P1645R1https://wg21.link/P1645R1
安全整数比较https://zh.cppreference.com/cpp/utility#整数比较函数
FTMhttps://zh.cppreference.com/cpp/feature_test#cpp_lib_integer_comparison_functions
P0586R2https://wg21.link/P0586R2
C++20https://en.wikipedia.org/wiki/C%2B%2B20
C++20 可行样例https://github.com/makelinux/examples/blob/HEAD/cpp/20.cpp
分类https://zh.cppreference.com/Special:%E9%A1%B5%E9%9D%A2%E5%88%86%E7%B1%BB
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