operator==,!=(std::istreambuf_iterator<CharT,Traits>)

 

C++

Compiler support

Freestanding and hosted

Language

Standard library

Standard library headers

Named requirements

Feature test macros (C++20)

Language support library

Concepts library (C++20)

Metaprogramming library (C++11)

Diagnostics library

General utilities library

Strings library

Containers library

Iterators library

Ranges library (C++20)

Algorithms library

Numerics library

Localizations library

Input/output library

Filesystem library (C++17)

Regular expressions library (C++11)

Concurrency support library (C++11)

Execution support library (C++26)

Technical specifications

Symbols index

External libraries

 

Iterator library

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

 

std::istreambuf_iterator

Member functions

istreambuf_iterator::istreambuf_iterator

istreambuf_iterator::operator*

istreambuf_iterator::operator++istreambuf_iterator::operator++(int)

istreambuf_iterator::equal

Non-member functions

operator==operator!= (until C++20)

 

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

Checks whether both lhs and rhs are valid, or both are invalid, regardless of the stream buffer objects they use.

1) Equivalent to lhs.equal(rhs).

2) Equivalent to !lhs.equal(rhs).

3) Checks whether lhs is invalid. Equivalent to lhs.equal(istreambuf_iterator{}).
This function is not visible to ordinary unqualified or qualified lookup, and can only be found by argument-dependent lookup when std::istreambuf_iterator<CharT,Traits> is an associated class of the arguments.

The != operator is synthesized from operator==.

(since C++20)

Parameters

lhs, rhs

-

stream buffer iterators to compare

Return value

1) The result of lhs.equal(rhs).

2) The result of !lhs.equal(rhs).

3) The result of lhs.equal(istreambuf_iterator{}).

Exceptions

May throw implementation-defined exceptions.