operator==, !=, <, <=, >, >=, <=> (std::shared_ptr)
Defined in header <memory>
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Compare two shared_ptr objects. |
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template< class T, class U > bool operator==( const std::shared_ptr<T>& lhs, |
(1) | (since C++11) |
template< class T, class U > bool operator!=( const std::shared_ptr<T>& lhs, |
(2) | (since C++11) (until C++20) |
template< class T, class U > bool operator<( const std::shared_ptr<T>& lhs, |
(3) | (since C++11) (until C++20) |
template< class T, class U > bool operator>( const std::shared_ptr<T>& lhs, |
(4) | (since C++11) (until C++20) |
template< class T, class U > bool operator<=( const std::shared_ptr<T>& lhs, |
(5) | (since C++11) (until C++20) |
template< class T, class U > bool operator>=( const std::shared_ptr<T>& lhs, |
(6) | (since C++11) (until C++20) |
template< class T, class U > std::strong_ordering operator<=>( const std::shared_ptr<T>& lhs, |
(7) | (since C++20) |
Compare a shared_ptr with a null pointer. |
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template< class T > bool operator==( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(8) | (since C++11) |
template< class T > bool operator==( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(9) | (since C++11) (until C++20) |
template< class T > bool operator!=( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(10) | (since C++11) (until C++20) |
template< class T > bool operator!=( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(11) | (since C++11) (until C++20) |
template< class T > bool operator<( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(12) | (since C++11) (until C++20) |
template< class T > bool operator<( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(13) | (since C++11) (until C++20) |
template< class T > bool operator>( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(14) | (since C++11) (until C++20) |
template< class T > bool operator>( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(15) | (since C++11) (until C++20) |
template< class T > bool operator<=( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(16) | (since C++11) (until C++20) |
template< class T > bool operator<=( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(17) | (since C++11) (until C++20) |
template< class T > bool operator>=( const std::shared_ptr<T>& lhs, std::nullptr_t ) noexcept; |
(18) | (since C++11) (until C++20) |
template< class T > bool operator>=( std::nullptr_t, const std::shared_ptr<T>& rhs ) noexcept; |
(19) | (since C++11) (until C++20) |
template< class T > std::strong_ordering operator<=>( const std::shared_ptr<T>& lhs, |
(20) | (since C++20) |
Compares two shared_ptr<T>
objects or compares shared_ptr<T>
with a null pointer.
Note that the comparison operators for shared_ptr
simply compare pointer values; the actual objects pointed to are not compared. Having operator<
defined for shared_ptr
allows shared_ptr
s to be used as keys in associative containers, like std::map and std::set.
The |
(since C++20) |
Contents |
[edit] Parameters
lhs | - | the left-hand shared_ptr to compare
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rhs | - | the right-hand shared_ptr to compare
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