time-to-botec/squiggle/node_modules/@stdlib/array/safe-casts/README.md

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# Safe Casts

> Return a list of array [data types][@stdlib/array/dtypes] to which a provided array [data type][@stdlib/array/dtypes] can be safely cast.

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## Usage

```javascript
var safeCasts = require( '@stdlib/array/safe-casts' );
```

#### safeCasts( \[dtype] )

If provided a `dtype` argument, returns a list of array [data types][@stdlib/array/dtypes] to which a provided array [data type][@stdlib/array/dtypes] can be safely cast.

```javascript
var out = safeCasts( 'float32' );
// e.g., returns [ 'float32', 'float64', 'generic' ]
```

If not provided a `dtype` argument, the function returns a casting table.

```javascript
var out = safeCasts();
// returns {...}

var f32 = out[ 'float32' ];
// returns {...}

var v = f32[ 'float64' ];
// returns 1
```

If provided an unrecognized or unsupported `dtype`, the function returns `null`.

```javascript
var out = safeCasts( 'foo' );
// returns null
```

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## Examples

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

```javascript
var dtypes = require( '@stdlib/array/dtypes' );
var safeCasts = require( '@stdlib/array/safe-casts' );

var DTYPES;
var list;
var i;

// Get the list of supported array data types:
DTYPES = dtypes();

// Print the list of array data types to which a data type can be safely cast...
for ( i = 0; i < DTYPES.length; i++ ) {
    list = safeCasts( DTYPES[ i ] );
    console.log( '%s: %s', DTYPES[ i ], list.join( ', ' ) );
}
```

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[@stdlib/array/dtypes]: https://www.npmjs.com/package/@stdlib/array/tree/main/dtypes

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