std::ostream_iterator<T,CharT,Traits>::operator=

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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
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Algorithm concepts and utilities

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indirectly_unary_invocableindirectly_regular_unary_invocable

(C++20)(C++20)

indirect_unary_predicate (C++20)
indirect_binary_predicate (C++20)

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indirectly_movable (C++20)
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(C++20)

(C++20)

(C++26)

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
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inserter
insert_iterator
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move_sentinel (C++20)

common_iterator (C++20)
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const_sentinel (C++23)
make_const_iterator (C++23)
make_const_sentinel (C++23)

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istream_iterator
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Range access

begincbegin (C++11)(C++14)
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endcend (C++11)(C++14)
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sizessize (C++17)(C++20)
empty (C++17)
data (C++17)

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std::ostream_iterator

Member functions
ostream_iterator::ostream_iterator
ostream_iterator::~ostream_iterator
ostream_iterator::operator=
ostream_iterator::operator*
ostream_iterator::operator++ostream_iterator::operator++(int)

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ostream_iterator& operator=(const ostream_iterator&);	(1)
ostream_iterator& operator=(const T& value);	(2)

1) Copy assignment operator. Assigns the contents ofother

2) Insertsvalue into the associated stream, then inserts the delimiter, if one was specified at construction time.

Ifout_stream is a pointer to the associatedstd::basic_ostream anddelim is the delimiter specified at the construction of this object, then the effect is equivalent to

*out_stream<< value;
if(delim!=0)
*out_stream<< delim;
return*this;

[edit]Parameters

value

the object to insert

[edit]Return value

*this

[edit]Notes

T can be any class with a user-definedoperator<<.

Prior to C++20, the existence of the copy assignment operator relied on thedeprecated implicit generation.

[edit]Example

Run this code

#include <iostream>#include <iterator> int main(){std::ostream_iterator<int> i1(std::cout,", ");*i1++=1;// usual form, used by standard algorithms*++i1=2;    i1=3;// neither * nor ++ are necessarystd::ostream_iterator<double> i2(std::cout);    i2=3.14;std::cout<<'\n';}