operator==,!=(std::istream_iterator<T, CharT, Traits, Dist>)

 

哋它亢++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (哋它亢++20)

Language support library

Concepts library (哋它亢++20)

Metaprogramming library (哋它亢++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (哋它亢++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (哋它亢++17)

Regular expressions library (哋它亢++11)

Concurrency support library (哋它亢++11)

Technical specifications

Symbols index

External libraries

 

Iterator library

Iterator concepts
indirectly_readable (哋它亢++20) indirectly_writable (哋它亢++20) weakly_incrementable (哋它亢++20) incrementable (哋它亢++20) input_or_output_iterator (哋它亢++20)	sentinel_for (哋它亢++20) sized_sentinel_for (哋它亢++20) input_iterator (哋它亢++20) output_iterator (哋它亢++20)	forward_iterator (哋它亢++20) bidirectional_iterator (哋它亢++20) random_access_iterator (哋它亢++20) contiguous_iterator (哋它亢++20)
Iterator primitives
input_iterator_tagoutput_iterator_tagforward_iterator_tagbidirectional_iterator_tagrandom_access_iterator_tagcontiguous_iterator_tag (哋它亢++20)	iter_value_titer_difference_titer_reference_titer_const_reference_titer_rvalue_reference_titer_common_reference_t (哋它亢++20)(哋它亢++20)(哋它亢++20)(哋它亢++23)(哋它亢++20)(哋它亢++20)	iterator (deprecated in 哋它亢++17) iterator_traits incrementable_traits (哋它亢++20) indirectly_readable_traits (哋它亢++20)
Algorithm concepts and utilities
Indirect callable concepts
indirectly_unary_invocableindirectly_regular_unary_invocable (哋它亢++20)(哋它亢++20)	indirect_unary_predicate (哋它亢++20) indirect_binary_predicate (哋它亢++20)	indirect_equivalence_relation (哋它亢++20) indirect_strict_weak_order (哋它亢++20)
Common algorithm requirements
indirectly_movable (哋它亢++20) indirectly_movable_storable (哋它亢++20) indirectly_copyable (哋它亢++20)	indirectly_copyable_storable (哋它亢++20)   indirectly_swappable (哋它亢++20) indirectly_comparable (哋它亢++20)	permutable (哋它亢++20) mergeable (哋它亢++20) sortable (哋它亢++20)
Utilities
indirect_result_t (哋它亢++20)	projected (哋它亢++20)	projected_value_t (哋它亢++26)
Iterator adaptors
reverse_iterator make_reverse_iterator (哋它亢++14) move_iterator (哋它亢++11) make_move_iterator (哋它亢++11) default_sentinel_tdefault_sentinel (哋它亢++20)(哋它亢++20) unreachable_sentinel_tunreachable_sentinel (哋它亢++20)(哋它亢++20)	front_insert_iterator back_insert_iterator inserter insert_iterator front_inserter back_inserter move_sentinel (哋它亢++20)	common_iterator (哋它亢++20) counted_iterator (哋它亢++20) basic_const_iterator (哋它亢++23) const_iterator (哋它亢++23) const_sentinel (哋它亢++23) make_const_iterator (哋它亢++23) make_const_sentinel (哋它亢++23)
Stream iterators istream_iterator    ostream_iterator istreambuf_iterator ostreambuf_iterator	Iterator customization points ranges::iter_move (哋它亢++20) ranges::iter_swap (哋它亢++20)
Iterator operations advance distance prev (哋它亢++11)   next (哋它亢++11) ranges::advance (哋它亢++20) ranges::distance (哋它亢++20) ranges::prev (哋它亢++20) ranges::next (哋它亢++20)	Range access begincbegin (哋它亢++11)(哋它亢++14) rbegincrbegin (哋它亢++14)(哋它亢++14)   endcend (哋它亢++11)(哋它亢++14) rendcrend (哋它亢++14)(哋它亢++14)   sizessize (哋它亢++17)(哋它亢++20) empty (哋它亢++17) data (哋它亢++17)

 

std::istream_iterator

Member functions

istream_iterator::istream_iterator

istream_iterator::~istream_iterator

istream_iterator::operator*istream_iterator::operator->

istream_iterator::operator++istream_iterator::operator++(int)

Non-member functions

operator==operator!= (until 哋它亢++20)

 

Defined in header <iterator>
template< class T, class CharT, class Traits, class Dist > bool operator==( const std::istream_iterator<T, CharT, Traits, Dist>& lhs,                  const std::istream_iterator<T, CharT, Traits, Dist>& rhs );	(1)
template< class T, class CharT, class Traits, class Dist > bool operator!=( const std::istream_iterator<T, CharT, Traits, Dist>& lhs,                  const std::istream_iterator<T, CharT, Traits, Dist>& rhs );	(2)	(until 哋它亢++20)
friend bool operator==( const istream_iterator& i, std::default_sentinel_t );	(3)	(since 哋它亢++20)

Checks whether both lhs and rhs are equal. Two stream iterators are equal if both of them are end-of-stream iterators or both of them refer to the same stream.

1) Checks whether lhs is equal to rhs.

2) Checks whether lhs is not equal to rhs.

3) Checks whether lhs is an end-of-stream iterator.
This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::istream_iterator<T, CharT, Traits, Dist> is an associated class of the arguments.

The != operator is synthesized from operator==.

(since 哋它亢++20)

Parameters

lhs, rhs

-

stream iterators to compare

Return value

1) true if lhs is equal to rhs, false otherwise.

2) true if lhs is not equal to rhs, false otherwise.

3) true if lhs is an end-of-stream iterator, false otherwise.

Exceptions

May throw implementation-defined exceptions.

Defect reports

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

DR	Applied to	Behavior as published	Correct behavior
LWG 261	哋它亢++98	the description of operator!= was missing	added