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std::reverse_iterator<Iter>::reverse_iterator

(1) 
reverse_iterator();
 (until C++17) 
constexpr reverse_iterator();
 (since C++17)
(2) 
explicit reverse_iterator( iterator_type x );
 (until C++17) 
constexpr explicit reverse_iterator( iterator_type x );
 (since C++17)
(3) 
template< class U >
reverse_iterator( const reverse_iterator<U>& other );
 (until C++17) 
template< class U >
constexpr reverse_iterator( const reverse_iterator<U>& other );
 (since C++17)

Constructs a new iterator adaptor.

1) Default constructor. The underlying iterator is value-initialized. Operations on the resulting iterator have defined behavior if and only if the corresponding operations on a value-initialized Iter also have defined behavior.
2) The underlying iterator is initialized with x.
3) The underlying iterator is initialized with that of other. This overload participates in overload resolution only if U is not the same type as Iter and std::convertible_to<const U&, Iter> is modeled(since C++20).

Parameters

x - iterator to adapt
other - iterator adaptor to copy

Example

Defect reports

The following behavior-changing defect reports were applied retroactively to previously published C++ standards.

DR Applied to Behavior as published Correct behavior
LWG 235 C++98 the effect of the default constructor was not specified specified
LWG 1012 C++98 the underlying iterator was default-initialized it is value-initialized
LWG 3435 C++20 the converting constructor from another reverse_iterator was not constrained constrained

See also

assigns another iterator adaptor
(public member function)
(C++14)
creates a std::reverse_iterator of type inferred from the argument
(function template)

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