template< class R, class T > constexpr bool in_range( T t ) noexcept { return std::cmp_greater_equal(t, std::numeric_limits<R>::min()) && std::cmp_less_equal(t, std::numeric_limits<R>::max()); }注解此函数不能用于 std::byte、 char、 char8_t、 char16_t、 char32_t、 ...
std::in_range std::declval std::forward std::move std::move_if_noexcept std::chars_format std::piecewise_construct_t std::piecewise_construct std::in_place, std::in_place_type, std::in_place_index, std::in_place_t, std::in_place_type_t, std::in_place_index_t 注释 类型支持(基...
Defined in header <utility> template< class R, class T > constexpr bool in_range( T t ) noexcept; (since C++20) Returns true if the value of t is in the range of values that can be represented in R, that is, if t can be converted to R in a value-preserving manner. It ...
std::__wrap_iter<constint*>>'evaluatedtofalseindirectly_movable<_In,
GCC支持在编译的时候使用-std选项来选择编译语言的标准。程序本身也是在发展的，不断变化的。以 C 语言...
再提一嘴：C++20 标准化的范围库并不是超前的特性，它的前身是开源库 Range-v3 链接：ericniebler/...
2) Equivalent to return {std::move(in1), std::move(in2), std::move(out)};. Standard library The following standard library functions use ranges::in_in_out_result as the return type: Algorithm functions ranges::transform (C++20) applies a function to a range of elements(algorithm ...
Ifkdoes not match the key of any element in the container, the function throws anout_of_rangeexception. 如果容器中没有匹配的k键,该函数将抛出一个out_of_range异常 如何避免std::out_of_range异常 正确使用 错误使用 1.std::map::at的正确使用 ...
insert_range (C++23) inserts a range of elements (public member function) emplace (C++11) constructs element in-place (public member function) erase erases elements (public member function) push_back adds an element to the end (public member function) ...
Defined in header <type_traits> template< class T > struct add_pointer; (since C++11) 如果T是一个引用类型,然后提供成员类型type它是指向引用类型的指针。 否则,如果T为对象类型命名,则不属于cv或ref限定%28的函数类型(因为C++17%29)或%28(可能是cv限定%29空类型)提供了type哪种类型T...