C++ concepts: OutputIterator

 

C++

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C++ concepts

Basic
DefaultConstructible CopyAssignable CopyConstructible	MoveAssignable (C++11) MoveConstructible (C++11) Destructible
Library-Wide
EqualityComparable LessThanComparable Swappable (C++11) ValueSwappable (C++11)	NullablePointer (C++11) Hash (C++11) Allocator
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Container SequenceContainer ReversibleContainer	AssociativeContainer AllocatorAwareContainer UnorderedAssociativeContainer (C++11)
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CopyInsertable (C++11) MoveInsertable (C++11)	EmplaceConstructible (C++11)
Iterator
Iterator OutputIterator InputIterator	ForwardIterator BidirectionalIterator RandomAccessIterator
Stream I/O
FormattedInputFunction UnformattedInputFunction	FormattedOutputFunction UnformattedOutputFunction
Random Numbers
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BasicLockable (C++11) Lockable (C++11) TimedLockable (C++11)	Mutex (C++11) TimedMutex (C++11)
Other
CharTraits pos_type off_type Clock (C++11)	UnaryTypeTrait (C++11) BinaryTypeTrait (C++11) TransformationTrait (C++11) TrivialClock (C++11)

 

An OutputIterator is an Iterator that can write to the pointed-to element.

An example of a type that implements OutputIterator is std::ostream_iterator.

When ForwardIterator, BidirectionalIterator, or RandomAccessIterator satisfies the OutputIterator requirements in addition to its own requirements, it is described as mutable.

Requirements

• Iterator

In addition to the above requirement, for a type It to be an OutputIterator, instances i and o of It must:

Expression	Return	Equivalent expression	Notes
*i = o			it may not be possible to write twice in the same iterator
++i	It&		After this, copies of i may be invalidated. Post: &r == &++r
i++	const It&	It temp = i; ++i; return temp;
*i++ = o		*i = o; ++i;