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

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std::istreambuf_iterator
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.

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