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std::common_iterator<I,S>::operator*,->

From cppreference.com
 
C++
 
Iterator library
Iterator concepts
Iterator primitives
Algorithm concepts and utilities
Indirect callable concepts
Common algorithm requirements
(C++20)
(C++20)
(C++20)
Utilities
(C++20)
Iterator adaptors
Range access
(C++11)(C++14)
(C++14)(C++14)  
(C++11)(C++14)
(C++14)(C++14)  
(C++17)(C++20)
(C++17)
(C++17)
 
std::common_iterator
 
constexpr decltype(auto) operator*();
 (1) (since C++20)
constexpr decltype(auto) operator*() const
    requires /*dereferenceable*/<const I>;
 (2) (since C++20)
constexpr auto operator->() const
    requires /* see description */;
 (3) (since C++20)
Helper types
class /*proxy*/ {

    std::iter_value_t<I> keep_;
    constexpr proxy(std::iter_reference_t<I>&& x)
        : keep_(std::move(x)) {}
public:
    constexpr const