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r
and s
are output iterators and
that v is a value of type Object
.
expression | return type | note |
---|---|---|
r.cmp(s)
|
boolean
| compare two iterators |
r.next()
|
Iterator
| advance the iterator |
r.put(v)
|
Object
| deference the iterator |
NOTE:Assignment through the same value of the iterator happens
only once.
Algorithms on output iterators should never attempt to pass through the
same iterator twice.
They should be single pass algorithms.
Equality and inequality are not necessarily defined.
Algorithms that take output iterators can be used with OutputStream as
the destination for placing data through the OutputStreamIterator
class as well as with insert iterators.
In particular, the following two conditions should hold: first, any
iterator value should be assigned through before it is incremented (this is,
for an output iterator i
,
i.next(); i.next();is not a valid code sequence); second, any value of an output iterator may have at most one active copy at any given time (for example,
i = j.copy(); i.next(); i.put(a); j.put(b);is not a valid code sequence).
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