__cpp_lib_constexpr_unordered_set202502L(C++26)constexprstd::unordered_set Example Run this code #include <iostream>#include <unordered_set>voidprint(constauto&set){for(constauto&elem:set)std::cout<<elem<<' ';st
cppreference.com Page Discussion std::unordered_set<Key,Hash,KeyEqual,Allocator>::findC++ Containers library std::unordered_set iterator find( const Key& key ); (1) (since C++11) (constexpr since C++26) const_iterator find( const Key& key ) const; (2) (since C++11) (constexpr since...
cppreference.com Create account Page Discussion Standard revision: View Edit History std::unordered_set<Key,Hash,KeyEqual,Allocator>::containsC++ Containers library std::unordered_set bool contains( const Key& key ) const; (1) (since C++20) template< class K > bool contains( const K& x ...
From cppreference.com std::unordered_set (1) iterator erase(iterator pos); (since C++11) (until C++23) iterator erase(iterator pos) requires(!std::same_as<iterator, const_iterator>); (since C++23) iterator erase(const_iterator pos); ...
你想做的事情可以通过std::unodered_set::extract完成。cppreference的例子：
const_referenceconst value_type& pointerstd::allocator_traits<Allocator>::pointer const_pointerstd::allocator_traits<Allocator>::const_pointer iterator常遗留向前迭代器(LegacyForwardIterator) const_iterator常向前迭代器 local_iterator类别、值、差、指针和引用类型都与iterator相同的迭代器类型。
我起初完全支持该看法，但是我在 cppreference 上看到了非常吊诡的一幕。除了 vector 以外，其他所有容器...
cppreferencewrote: Explanation 1) If the argument is an unparenthesized id-expression or an unparenthesized class member access expression, then decltype yields the type of the entity named by this expression. If there is no such entity, or if the argument names a set of overloaded functions, ...
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