# initializeMemory(as:repeating:count:) Initializes the memory referenced by this pointer with the given value, binds the memory to the value’s type, and returns a typed pointer to the initialized memory. ``` @discardableResult func initializeMemory(as type: T.Type, repeating repeatedValue: T, count: Int) -> UnsafeMutablePointer ``` ## Parameters `type` The type to bind this memory to. `repeatedValue` The instance to copy into memory. `count` The number of copies of `value` to copy into memory. `count` must not be negative. ## Return Value A typed pointer to the memory referenced by this raw pointer. ## Discussion The memory referenced by this pointer must be uninitialized or initialized to a trivial type, and must be properly aligned for accessing `T`. The following example allocates enough raw memory to hold four instances of `Int8`, and then uses the `initializeMemory(as:repeating:count:)` method to initialize the allocated memory. ``` let count = 4 let bytesPointer = UnsafeMutableRawPointer.allocate( byteCount: count * MemoryLayout.stride, alignment: MemoryLayout.alignment) let int8Pointer = bytesPointer.initializeMemory( as: Int8.self, repeating: 0, count: count) // After using 'int8Pointer': int8Pointer.deallocate() ``` After calling this method on a raw pointer `p`, the region starting at `self` and continuing up to `p + count * MemoryLayout.stride` is bound to type `T` and initialized. If `T` is a nontrivial type, you must eventually deinitialize or move from the values in this region to avoid leaks. --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)