std::shared_ptr::operator==, !=, <, <=, >, >=

 

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rel_ops::operator!=rel_ops::operator>rel_ops::operator<=rel_ops::operator>=

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std::shared_ptr

Member functions

shared_ptr::shared_ptr

shared_ptr::~shared_ptr

shared_ptr::operator=

Modifiers

shared_ptr::reset

shared_ptr::swap

Observers

shared_ptr::get

shared_ptr::operator*shared_ptr::operator->

shared_ptr::use_count

shared_ptr::unique

shared_ptr::operator bool

shared_ptr::owner_before

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std::swap

make_shared

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static_pointer_castdynamic_pointer_castconst_pointer_cast

get_deleter

operator==operator|=operator<operator<=operator>operator>=

operator<<

atomic_is_lock_freeatomic_loadatomic_load_explicitatomic_storeatomic_store_explicitatomic_exchangeatomic_exchange_explicitatomic_compare_exchange_weakatomic_compare_exchange_strongatomic_compare_exchange_weak_explicitatomic_compare_exchange_strong_explicit

std::hash

 

Compare two shared_ptr objects
template < class T, class U > bool operator==( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(1)	(since C++11)
template< class T, class U > bool operator!=( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(2)	(since C++11)
template< class T, class U > bool operator<( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(3)	(since C++11)
template< class T, class U > bool operator>( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(4)	(since C++11)
template< class T, class U > bool operator<=( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(5)	(since C++11)
template< class T, class U > bool operator>=( const shared_ptr<T>& lhs, const shared_ptr<U>& rhs );	(6)	(since C++11)
Compare a shared_ptr with a null pointer
template< class T > bool operator==( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(7)	(since C++11)
template< class T > bool operator==( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(8)	(since C++11)
template< class T > bool operator!=( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(9)	(since C++11)
template< class T > bool operator!=( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(10)	(since C++11)
template< class T > bool operator<( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(11)	(since C++11)
template< class T > bool operator<( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(12)	(since C++11)
template< class T > bool operator<=( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(13)	(since C++11)
template< class T > bool operator<=( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(14)	(since C++11)
template< class T > bool operator>( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(15)	(since C++11)
template< class T > bool operator>( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(16)	(since C++11)
template< class T > bool operator>=( const shared_ptr<T>& lhs, std::nullptr_t rhs );	(17)	(since C++11)
template< class T > bool operator>=( std::nullptr_t lhs, const shared_ptr<T>& rhs );	(18)	(since C++11)

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_ptrs to be used as keys in associative containers, like std::map and std::set.

Parameters

lhs	-	the left-hand shared_ptr to compare
rhs	-	the right-hand shared_ptr to compare

Return value

1) lhs.get() == rhs.get()

2) !(lhs == rhs)

3) std::less<V>()(lhs.get(), rhs.get()), where V is the composite pointer type of T* and U*

4) rhs < lhs

5) !(rhs < lhs)

6) !(lhs < rhs)

7) !lhs

8) !rhs

9) (bool)lhs

10) (bool)rhs

11) std::less<T*>()(lhs.get(), nullptr)

12) std::less<T*>()(nullptr, rhs.get())

13) nullptr < lhs

14) rhs < nullptr

15) !(nullptr < lhs)

16) !(rhs < nullptr)

17) !(lhs < nullptr)

18) !(nullptr < rhs)

Exceptions

noexcept specification:  

noexcept

  

See also

get	returns a pointer to the managed object (public member function)