# tbb::blocked_range< Value > Class Template Reference
[Algorithms]

A range over which to iterate. More...

`#include <blocked_range.h>`

List of all members.

## Public Types

typedef Value | const_iterator
| Type of a value.
typedef std::size_t | size_type
| Type for size of a range.

## Public Member Functions

| blocked_range ()
| Construct range with default-constructed values for begin and end.
| blocked_range (Value begin_, Value end_, size_type grainsize_=1)
| Construct range over half-open interval [begin,end), with the given grainsize.
const_iterator | begin () const
| Beginning of range.
const_iterator | end () const
| One past last value in range.
size_type | size () const
| Size of the range.
size_type | grainsize () const
| The grain size for this range.
bool | empty () const
| True if range is empty.
bool | is_divisible () const
| True if range is divisible.
| blocked_range (blocked_range &r, split)
| Split range.

## Friends

class | blocked_range2d
class | blocked_range3d

## Detailed Description

### template<typename Value>
class tbb::blocked_range< Value >

A range over which to iterate.

## Member Typedef Documentation

template<typename Value>

typedef Value tbb::blocked_range< Value >::const_iterator

Type of a value.

Called a const_iterator for sake of algorithms that need to treat a blocked_range as an STL container.

## Constructor & Destructor Documentation

template<typename Value>

tbb::blocked_range< Value >::blocked_range | ( |  | ) | `[inline]`

Construct range with default-constructed values for begin and end.

Requires that Value have a default constructor.

template<typename Value>

tbb::blocked_range< Value >::blocked_range | ( | blocked_range< Value > & | r,
|  | split |  |
| ) |  |  | `[inline]`

Split range.

The new Range *this has the second half, the old range r has the first half. Unspecified if end()<begin() or !is_divisible().

## Member Function Documentation

template<typename Value>

bool tbb::blocked_range< Value >::is_divisible | ( |  | ) | const`[inline]`

True if range is divisible.

Unspecified if end()<begin().

template<typename Value>

size_type tbb::blocked_range< Value >::size | ( |  | ) | const`[inline]`

Size of the range.

Unspecified if end()<begin().

The documentation for this class was generated from the following file:

- blocked_range.h

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