---
title: "moveInitialize(from:count:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/unsafemutablepointer/moveinitialize(from:count:)"
---

# moveInitialize(from:count:)

Moves instances from initialized source memory into the uninitialized memory referenced by this pointer, leaving the source memory uninitialized and the memory referenced by this pointer initialized.

## Declaration

```swift
func moveInitialize(from source: UnsafeMutablePointer<Pointee>, count: Int)
```

## Parameters

- `source`: A pointer to the values to copy. The memory region source..<(source + count) must be initialized. The memory regions referenced by source and this pointer may overlap.
- `count`: The number of instances to move from source to this pointer’s memory. count must not be negative.

## Discussion

Discussion The region of memory starting at this pointer and covering count instances of the pointer’s Pointee type must be uninitialized or Pointee must be a trivial type. After calling moveInitialize(from:count:), the region is initialized and the memory region source..<(source + count) is uninitialized. note: Returns without performing work if self and source are equal.