# std::experimental::ranges::next

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< cpp‎ | experimental‎ | ranges

Defined in header `<experimental/ranges/iterator>` |  |
namespace { constexpr /* unspecified */ next = /* unspecified */; } |  | (ranges TS) (customization point object)
Call signature |  |
template< Iterator I > constexpr I next( I i ); | (1) |
template< Iterator I > constexpr I next( I i, ranges::difference_type_t<I> n ); | (2) |
template< Iterator I, Sentinel<I> S > constexpr I next( I i, S bound ); | (3) |
template< Iterator I, Sentinel<I> S > constexpr I next( I i, ranges::difference_type_t<I> n, S bound ); | (4) |

Advances the iterator i n times, or until bound is reached, whichever comes first, and returns the advanced iterator.

1) Equivalent to ++i; return i;.
2) Equivalent to ranges::advance(i, n); return i;.
3) Equivalent to ranges::advance(i, bound); return i;.
4) Equivalent to ranges::advance(i, n, bound); return i;.

### Customization point objects

The name `ranges::next` denotes a customization point object, which is a function object of a literal `Semiregular` class type (denoted, for exposition purposes, as `NextT`). All instances of `NextT` are equal. Thus, `ranges::next` can be copied freely and its copies can be used interchangeably.

Given a set of types `Args...`, if std::declval<Args>()... meet the requirements for arguments to `ranges::next` above, `NextT` will satisfy ranges::Invocable<const NextT, Args...>. Otherwise, no function call operator of `NextT` participates in overload resolution.

In every translation unit in which `ranges::next` is defined, it refers to the same instance of the customization point object. (This means that it can be used freely in things like inline functions and function templates without violating the one-definition rule.)

### Return value

The advanced iterator.

### Notes

Even though omitting n for overload (2) behaves as if n is 1, omitting n for overload (4) effectively behaves as if n is infinity (always advance to bound).

### Example

| This section is incomplete Reason: no example

### See also

next (C++11) | increment an iterator (function template)
advance | advances an iterator by given distance (function template)
prev | decrement an iterator (function template)
distance | returns the distance between an iterator and a sentinel, or between the beginning and the end of a range (function template)

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