这里列出了所有文档化的类成员，并附带类所属的文件:

- v -

• valid() : packaged_task< Res(Args...)>
• value : compressed_pair< IfEmpty, T, Compressed >, compressed_pair< IfEmpty, T, false >, integral_constant< T, Value >, optional< T >, optional< T & >
• value_or() : optional< T >, optional< T & >
• value_type : allocated_ptr< Alloc >, atomic< T >, atomic< bool >, atomic< char >, atomic< char16_t >, atomic< char32_t >, atomic< double >, atomic< float >, atomic< int >, atomic< long >, atomic< long double >, atomic< long long >, atomic< short >, atomic< signed char >, atomic< T & >, atomic< T * >, atomic< unsigned char >, atomic< unsigned int >, atomic< unsigned long >, atomic< unsigned long long >, atomic< unsigned short >, atomic< wchar_t >, atomic_base< T >, atomic_base< T * >, atomic_flag, atomic_float_base< Float >, atomic_ref_base< Float, false, true >, atomic_ref_base< T, false, false >, atomic_ref_base< T, true, false >, back_insert_iterator< Container >, front_insert_iterator< Container >, insert_iterator< Container >, integer_sequence< T, Values >, integral_constant< T, Value >, iterator_traits< T * >, normal_iterator< Iterator >, optional< T & >, reverse_iterator< Iterator >, standard_allocator< T >, temporary_buffer< Iterator >
• variant() : variant< Types >
• visit() : variant< Types >