# withNSDKStrings

Source: https://www.nianticspatial.com/docs/api/swift/NSDK.NSDKUtils.method-withNSDKStrings/

withNSDKStrings

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## Declaration

static func withNSDKStrings<Result>(_ body: ((String?) -> ARDK_String) throws -> Result) rethrows -> Result

#### Summary

Safely manages multiple C string conversions with automatic memory cleanup.
This function provides a convenient way to work with multiple C strings in a single scope
while ensuring proper memory management. It automatically allocates memory for C strings
and cleans up all allocated memory when the scope exits.
Use this function when you need to have multiple C strings in a single scope and
the number of nested scopes gets too messy. Otherwise, prefer Swift's built-in
String.withCString for simpler cases.

#### Returns

The result of executing the body closure

#### Throws

Any error thrown by the body closure

#### Example

```swift
let result = NSDKUtils.withNSDKStrings { createString in
    let string1 = createString("Hello")
    let string2 = createString("World")
    let string3 = createString(nil) // Creates empty string
    // Use the NSDK strings with C API calls
    return someCFunction(string1, string2, string3)
}
// Memory is automatically cleaned up here
```

#### Memory Management

The function automatically:

- Allocates memory for each string using `strdup`
- Tracks all allocated pointers
- Frees all memory when the scope exits (even if an error is thrown)
- Handles nil and empty strings gracefully

  ### Parameters

| Name | Type | Summary |
| --- | --- | --- |
| body | ((String?) -> ARDK_String) throws -> Result | A closure that receives a function for creating NSDK strings |

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