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Copyright (c) 2020 The Stdlib Authors.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# Nullary

> Apply a nullary callback and assign results to elements in a strided output array.

<section class="intro">

</section>

<!-- /.intro -->

<section class="usage">

## Usage

```javascript
var nullary = require( '@stdlib/strided/base/nullary' );
```

#### nullary( arrays, shape, strides, fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```javascript
var Float64Array = require( '@stdlib/array/float64' );

function fill() {
    return 3.0;
}

var x = new Float64Array( [ -2.0, 1.0, 3.0, -5.0, 4.0, 0.0, -1.0, -3.0 ] );

nullary( [ x ], [ x.length ], [ 1 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, 3.0, 3.0, 3.0, 3.0, 3.0 ]
```

The function accepts the following arguments:

-   **arrays**: array-like object containing one strided output array.
-   **shape**: array-like object containing a single element, the number of indexed elements.
-   **strides**: array-like object containing the stride length for the strided output array.
-   **fcn**: nullary function to apply.

The `shape` and `strides` parameters determine which elements in the strided output array are accessed at runtime. For example, to index the first `N` elements of the strided output array in reverse order,

```javascript
var Float64Array = require( '@stdlib/array/float64' );

function fill() {
    return 3.0;
}

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );

nullary( [ x ], [ 3 ], [ -1 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, -4.0, -5.0, -6.0 ]
```

Note that indexing is relative to the first index. To introduce an offset, use [`typed array`][mdn-typed-array] views.

```javascript
var Float64Array = require( '@stdlib/array/float64' );

function fill() {
    return 3.0;
}

// Initial arrays...
var x0 = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );

// Create offset views...
var x1 = new Float64Array( x0.buffer, x0.BYTES_PER_ELEMENT*1 ); // start at 2nd element

nullary( [ x1 ], [ 3 ], [ 1 ], fill );
// x0 => <Float64Array>[ -1.0, 3.0, 3.0, 3.0, -5.0, -6.0 ]
```

#### nullary.ndarray( arrays, shape, strides, offsets, fcn )

Applies a nullary callback and assigns results to elements in a strided output array using alternative indexing semantics.

```javascript
var Float64Array = require( '@stdlib/array/float64' );

function fill() {
    return 3.0;
}

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0 ] );

nullary.ndarray( [ x ], [ x.length ], [ 1 ], [ 0 ], fill );
// x => <Float64Array>[ 3.0, 3.0, 3.0, 3.0, 3.0 ]
```

The function accepts the following additional arguments:

-   **offsets**: array-like object containing the starting index (i.e., index offset) for the strided output array.

While [`typed array`][mdn-typed-array] views mandate a view offset based on the underlying `buffer`, the `offsets` parameter supports indexing semantics based on starting indices. For example, to index the last `N` elements in the strided output array,

```javascript
var Float64Array = require( '@stdlib/array/float64' );

function fill() {
    return 3.0;
}

var x = new Float64Array( [ -1.0, -2.0, -3.0, -4.0, -5.0, -6.0 ] );

nullary.ndarray( [ x ], [ 3 ], [ -1 ], [ x.length-1 ], fill );
// x => <Float64Array>[ -1.0, -2.0, -3.0, 3.0, 3.0, 3.0 ]
```

</section>

<!-- /.usage -->

<section class="notes">

</section>

<!-- /.notes -->

<section class="examples">

## Examples

<!-- eslint no-undef: "error" -->

```javascript
var discreteUniform = require( '@stdlib/random/base/discrete-uniform' ).factory;
var filledarray = require( '@stdlib/array/filled' );
var nullary = require( '@stdlib/strided/base/nullary' );

var x = filledarray( 0.0, 10, 'generic' );
console.log( x );

var shape = [ x.length ];
var strides = [ 1 ];
var offsets = [ 0 ];

nullary.ndarray( [ x ], shape, strides, offsets, discreteUniform( -100, 100 ) );
console.log( x );
```

</section>

<!-- /.examples -->

<!-- C interface documentation. -->

* * *

<section class="c">

## C APIs

<!-- Section to include introductory text. Make sure to keep an empty line after the intro `section` element and another before the `/section` close. -->

<section class="intro">

Character codes for data types:

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- charcodes -->

-   **x**: `bool` (boolean).
-   **z**: `complex128` (double-precision floating-point complex number).
-   **c**: `complex64` (single-precision floating-point complex number).
-   **f**: `float32` (single-precision floating-point number).
-   **d**: `float64` (double-precision floating-point number).
-   **k**: `int16` (signed 16-bit integer).
-   **i**: `int32` (signed 32-bit integer).
-   **s**: `int8` (signed 8-bit integer).
-   **t**: `uint16` (unsigned 16-bit integer).
-   **u**: `uint32` (unsigned 32-bit integer).
-   **b**: `uint8` (unsigned 8-bit integer).

<!-- ./charcodes -->

Function name suffix naming convention:

```text
stdlib_strided_<output_data_type>[_as_<callback_return_data_type>]
```

For example,

<!-- run-disable -->

```c
void stdlib_strided_d(...) {...}
```

is a function which accepts one double-precision floating-point strided output array. In other words, the suffix encodes the function type signature.

To support callbacks whose return values are of a different data type than the strided output array data type, the naming convention supports appending an `as` suffix. For example,

<!-- run-disable -->

```c
void stdlib_strided_f_as_d(...) {...}
```

is a function which accepts one single-precision floating-point strided output array. However, the callback returns double-precision floating-point numbers. Accordingly, the output value needs to be cast using the following conversion sequence

```c
// Evaluate the callback:
double out = f();

// Convert the callback return value to single-precision:
y[ i ] = (float)out;
```

</section>

<!-- /.intro -->

<!-- C usage documentation. -->

<section class="usage">

### Usage

```c
#include "stdlib/strided/base/nullary.h"
```

<!-- The following is auto-generated. Do not manually edit. See scripts/loops.js. -->

<!-- loops -->

#### stdlib_strided_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 1 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( void ) {
    // ...
}

// Apply the callback:
stdlib_strided_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_c_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( void ) {
    return 3.0f;
}

// Apply the callback:
stdlib_strided_c_as_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_c_as_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_c_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_c_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_c_as_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( void ) {
    // ...
}

// Apply the callback:
stdlib_strided_c_as_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_c_as_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( void ) {
    return 3.0;
}

// Apply the callback:
stdlib_strided_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( void ) {
    return 3.0f;
}

// Apply the callback:
stdlib_strided_d_as_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_d_as_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 8 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_d_as_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_d_as_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( void ) {
    return 3.0f;
}

// Apply the callback:
stdlib_strided_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_f_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f_as_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( void ) {
    return 3.0;
}

// Apply the callback:
stdlib_strided_f_as_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f_as_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f_as_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_f_as_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f_as_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_f_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_f_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_f_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_f_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_i_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_i_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_i_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_i_as_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_i_as_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_i_as_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_i_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_i_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_i_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_i_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_i_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_i_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_k_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_k_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_k_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_k_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_k_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_k_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 1 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_t_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 2 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_t_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_t_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_u_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_u_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_u_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_u_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 4 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_u_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_u_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_x( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdbool.h>
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 1 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static bool fcn( void ) {
    return true;
}

// Apply the callback:
stdlib_strided_x( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `bool (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_x( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float64/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex128_t fcn( void ) {
    // ...
}

// Apply the callback:
stdlib_strided_z( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex128_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_b( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_b( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_b( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_c( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include "stdlib/complex/float32/ctor.h"
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static stdlib_complex64_t fcn( void ) {
    // ...
}

// Apply the callback:
stdlib_strided_z_as_c( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `stdlib_complex64_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_c( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_d( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static double fcn( void ) {
    return 3.0;
}

// Apply the callback:
stdlib_strided_z_as_d( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `double (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_d( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_f( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static float fcn( void ) {
    return 3.0f;
}

// Apply the callback:
stdlib_strided_z_as_f( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `float (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_f( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_i( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_i( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_i( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_k( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_k( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_k( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_s( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static int8_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_s( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `int8_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_s( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_t( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint16_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_t( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint16_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_t( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

#### stdlib_strided_z_as_u( \*arrays\[], \*shape, \*strides, \*fcn )

Applies a nullary callback and assigns results to elements in a strided output array.

```c
#include <stdint.h>

// Create underlying byte arrays:
uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

// Define a pointer to an array containing pointers to strided arrays:
uint8_t *arrays[] = { out };

// Define the strides:
int64_t strides[] = { 16 };

// Define the number of elements over which to iterate:
int64_t shape[] = { 3 };

// Define a callback:
static uint32_t fcn( void ) {
    return 3;
}

// Apply the callback:
stdlib_strided_z_as_u( arrays, shape, strides, (void *)fcn );
```

The function accepts the following arguments:

-   **arrays**: `[inout] uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `[in] int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `[in] int64_t*` array containing strides (in bytes) for each strided array.
-   **fcn**: `[in] void*` a `uint32_t (*f)()` function to apply provided as a `void` pointer.

```c
void stdlib_strided_z_as_u( uint8_t *arrays[], const int64_t *shape, const int64_t *strides, void *fcn );
```

<!-- ./loops -->

<!-- macros -->

* * *

#### STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE

Macro containing the preamble for a loop which updates a strided output array.

```c
STDLIB_STRIDED_NULLARY_LOOP_PREMABLE {
    // Loop body...
}
```

The macro expects the following variables to be defined:

-   **arrays**: `uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `int64_t*` array containing strides (in bytes) for each strided array.

The macro defines the following variables:

-   **op1**: `uint8_t*` pointer to the first indexed element of the output strided array.
-   **os1**: `int64_t` index increment for the output strided array.
-   **n**: `int64_t` number of indexed elements.
-   **i**: `int64_t` loop counter.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE               \
    uint8_t *op1 = arrays[ 0 ];                            \
    int64_t os1 = strides[ 0 ];                            \
    int64_t n = shape[ 0 ];                                \
    int64_t i;                                             \
    if ( n <= 0 ) {                                        \
        return;                                            \
    }                                                      \
    if ( os1 < 0 ) {                                       \
        op1 += (1-n) * os1;                                \
    }                                                      \
    for ( i = 0; i < n; i++, op1 += os1 )
```

#### STDLIB_STRIDED_NULLARY_LOOP_TWO_OUT_PREAMBLE

Macro containing the preamble for a loop which updates two strided output arrays.

```c
STDLIB_STRIDED_NULLARY_LOOP_TWO_OUT_PREMABLE {
    // Loop body...
}
```

The macro expects the following variables to be defined:

-   **arrays**: `uint8_t**` array whose only element is a pointer to a strided output array.
-   **shape**: `int64_t*` array whose only element is the number of elements over which to iterate.
-   **strides**: `int64_t*` array containing strides (in bytes) for each strided array.

The macro defines the following variables:

-   **op1**: `uint8_t*` pointer to the first indexed element of the first output strided array.
-   **op2**: `uint8_t*` pointer to the first indexed element of the second output strided array.
-   **os1**: `int64_t` index increment for the first output strided array.
-   **os2**: `int64_t` index increment for the second output strided array.
-   **n**: `int64_t` number of indexed elements.
-   **i**: `int64_t` loop counter.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_TWO_OUT_PREAMBLE       \
    uint8_t *op1 = arrays[ 0 ];                            \
    uint8_t *op2 = arrays[ 1 ];                            \
    int64_t os1 = strides[ 0 ];                            \
    int64_t os2 = strides[ 1 ];                            \
    int64_t n = shape[ 0 ];                                \
    int64_t i;                                             \
    if ( n <= 0 ) {                                        \
        return;                                            \
    }                                                      \
    if ( os1 < 0 ) {                                       \
        op1 += (1-n) * os1;                                \
    }                                                      \
    if ( os2 < 0 ) {                                       \
        op2 += (1-n) * os2;                                \
    }                                                      \
    for ( i = 0; i < n; i++, op1 += os1, op2 += os2 )
```

#### STDLIB_STRIDED_NULLARY_LOOP_INLINE( tout, expr )

Macro for a nullary loop which inlines an expression.

```c
STDLIB_STRIDED_NULLARY_LOOP_INLINE( double, *out = (double)1.0 )
```

The macro expects the following arguments:

-   **tout**: output strided array element type.
-   **expr**: expression to inline.

In addition to the variables defined by the `STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE` macro, the macro defines the following variables:

-   **out**: `<tout>*` pointer to an output strided array element.

The macro expects a provided expression to store the result via `*out`.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_INLINE( tout, expr )   \
    STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE {                 \
        tout *out = (tout *)op1;                           \
        expr;                                              \
    }
```

#### STDLIB_STRIDED_NULLARY_LOOP_CLBK( tout )

Macro for a nullary loop which invokes a callback.

```c
STDLIB_STRIDED_NULLARY_LOOP_CLBK( double )
```

The macro expects the following arguments:

-   **tout**: output strided array element data type.

In addition to the variables expected by `STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE`, the macro expects the following variables to be defined:

-   **f**: nullary callback.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_CLBK( tout )           \
    STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE {                 \
        *(tout *)op1 = (tout)f();                          \
    }
```

#### STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_NOCAST( tout )

Macro for a nullary loop which invokes a callback and does not cast the return callback's return value (e.g., a `struct`).

```c
#include "stdlib/complex/float64/ctor.h"

STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_NOCAST( stdlib_complex128_t )
```

The macro expects the following arguments:

-   **tout**: output strided array element data type.

In addition to the variables expected by `STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE`, the macro expects the following variables to be defined:

-   **f**: nullary callback.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_NOCAST( tout )                    \
    STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE {                                     \
        *(tout *)op1 = f();                                                    \
    }
```

#### STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_CAST_FCN( tout, cout )

Macro for a nullary loop which invokes a callback whose return values should be cast to a different type via casting functions.

```c
#include "stdlib/complex/float32/ctor.h"
#include "stdlib/complex/float64/ctor.h"

STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_CAST_FCN( stdlib_complex64_t, stdlib_complex128_to_complex64 )
```

The macro expects the following arguments:

-   **tout**: output strided array element data type.
-   **cout**: function for casting an callback's return value to the output array data type.

In addition to the variables expected by `STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE`, the macro expects the following variables to be defined:

-   **f**: nullary callback.

```c
#define STDLIB_STRIDED_NULLARY_LOOP_CLBK_RET_CAST_FCN( tout, cout )            \
    STDLIB_STRIDED_NULLARY_LOOP_PREAMBLE {                                     \
        *(tout *)op1 = cout( f() );                                            \
    }
```

<!-- ./macros -->

</section>

<!-- /.usage -->

<!-- C API usage notes. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="notes">

</section>

<!-- /.notes -->

<!-- C API usage examples. -->

* * *

<section class="examples">

### Examples

```c
#include "stdlib/strided/base/nullary.h"
#include <stdint.h>
#include <stdio.h>
#include <inttypes.h>

// Define a callback:
static double fill( void ) {
    return 10.0;
}

int main( void ) {
    // Create underlying byte arrays:
    uint8_t out[] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };

    // Define a pointer to an array containing pointers to strided arrays:
    uint8_t *arrays[] = { out };

    // Define the strides:
    int64_t strides[] = { 8 }; // 8 bytes per double

    // Define the number of elements over which to iterate:
    int64_t shape[] = { 3 };

    // Apply the callback:
    stdlib_strided_d( arrays, shape, strides, (void *)fill );

    // Print the contents of the output array:
    uint8_t *op1 = out;
    for ( int64_t i = 0; i < shape[0]; i++, op1 += strides[0] ) {
        const double v = *(double *)op1;
        printf( "out[ %"PRId64" ] = %lf\n", i, v );
    }
}
```

</section>

<!-- /.examples -->

</section>

<!-- /.c -->

<!-- Section for related `stdlib` packages. Do not manually edit this section, as it is automatically populated. -->

<section class="related">

* * *

## See Also

-   <span class="package-name">[`@stdlib/strided/base/binary`][@stdlib/strided/base/binary]</span><span class="delimiter">: </span><span class="description">apply a binary callback to elements in strided input arrays and assign results to elements in a strided output array.</span>
-   <span class="package-name">[`@stdlib/strided/base/quaternary`][@stdlib/strided/base/quaternary]</span><span class="delimiter">: </span><span class="description">apply a quaternary callback to strided input array elements and assign results to elements in a strided output array.</span>
-   <span class="package-name">[`@stdlib/strided/base/quinary`][@stdlib/strided/base/quinary]</span><span class="delimiter">: </span><span class="description">apply a quinary callback to strided input array elements and assign results to elements in a strided output array.</span>
-   <span class="package-name">[`@stdlib/strided/base/ternary`][@stdlib/strided/base/ternary]</span><span class="delimiter">: </span><span class="description">apply a ternary callback to strided input array elements and assign results to elements in a strided output array.</span>
-   <span class="package-name">[`@stdlib/strided/base/unary`][@stdlib/strided/base/unary]</span><span class="delimiter">: </span><span class="description">apply a unary callback to elements in a strided input array and assign results to elements in a strided output array.</span>

</section>

<!-- /.related -->

<!-- Section for all links. Make sure to keep an empty line after the `section` element and another before the `/section` close. -->

<section class="links">

[mdn-typed-array]: https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/TypedArray

<!-- <related-links> -->

[@stdlib/strided/base/binary]: https://github.com/stdlib-js/strided/tree/main/base/binary

[@stdlib/strided/base/quaternary]: https://github.com/stdlib-js/strided/tree/main/base/quaternary

[@stdlib/strided/base/quinary]: https://github.com/stdlib-js/strided/tree/main/base/quinary

[@stdlib/strided/base/ternary]: https://github.com/stdlib-js/strided/tree/main/base/ternary

[@stdlib/strided/base/unary]: https://github.com/stdlib-js/strided/tree/main/base/unary

<!-- </related-links> -->

</section>

<!-- /.links -->